Schneider Electric CAD32BD — 24VDC Control Relay Buyer Review

By Abdullah Zahid
14 min read
Schneider Electric CAD32BD TeSys Deca 3NO 2NC 24VDC control relay mounted on DIN rail in industrial control panel

Schneider Electric CAD32BD — TeSys Deca Control Relay, 3NO+2NC, 690V, 24V DC Standard Coil: Specifications, Selection Guide and Buyer Review

Controls engineers and maintenance technicians searching for a 24VDC control relay with a 3NO+2NC contact configuration and 690VAC load rating frequently land on the Schneider Electric CAD32BD — and for good reason. This TeSys Deca series relay fits the most common auxiliary relay slot in North American machine control panels: DIN rail mounted, screw clamp terminals, compact 45mm width, and fully listed to UL, CSA, CE, and IEC standards. If you already know this is your part, the next step is straightforward.

If you have already confirmed this is the right part, check current pricing and availability for the CAD32BD at LeadTime.ca — ships worldwide.

Who Should Buy the CAD32BD — and Who Shouldn't

The Schneider Electric CAD32BD is the right relay for your application when all of the following are true:

  • Your control circuit operates on 24VDC — not 110VAC, 230VAC, or any AC line voltage.
  • You need exactly 3 normally open and 2 normally closed contacts (5 poles total) — not 4NO, 2NO+3NC, or any other configuration.
  • Your load voltage is 600VAC or below (the relay is rated to 690VAC IEC and 600VAC UL/CSA, giving you the margin most industrial circuits need).
  • Your load current does not exceed 10A continuous at rated voltage — including inrush transients.
  • You are mounting to a standard 35mm DIN rail and have at least 45mm of unobstructed panel width.
  • You require UL, CSA, CE, and IEC certifications for machine compliance — all are present on this part.

If your application needs an AC coil, a different contact configuration, or contact current above 10A, the CAD32BD is not the correct choice. A different suffix in the CAD32 family covers AC coil variants and alternate terminal types; the TeSys K series addresses higher current requirements. The variant comparison table below identifies the relevant alternatives by name.

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What the CAD32BD Actually Does in a Control System

The Schneider Electric CAD32BD is a TeSys Deca series industrial control relay that converts a low-voltage 24VDC control signal — sourced from a PLC output, pushbutton circuit, or sensor — into high-voltage load switching of up to 690VAC or 220VDC. It is not a power contactor; it is an interface device that sits between logic and load, enabling a small-signal controller to operate multiple independent circuits simultaneously through its 3NO+2NC contact configuration.

The five-pole contact arrangement is what makes this relay useful beyond simple on/off switching. Three normally open contacts can activate three separate downstream circuits when the coil energizes; the two normally closed contacts can simultaneously open interlocks, signal alarms, or de-energize parallel branches. Silver-nickel serrated contacts provide a wiping action that reduces contact resistance buildup and minimizes chattering in 12–24V control circuits — a practical advantage in systems where contact bounce can produce spurious PLC inputs or false safety signals.

The coil draws low power by design, which suits tight PLC output cards with limited drive current. The relay mounts to a standard 35mm DIN rail, occupies only 45mm of panel width, and presents screw clamp terminals that accept 0.5–2.5mm² wire at a torque of approximately 0.8–1.0 N·m. Operating temperature spans -40°C to +60°C ambient, making it suitable across cold-storage facilities, outdoor enclosures in moderate climates, and heat-intensive process areas alike.

Typical System Architecture for the CAD32BD

The CAD32BD sits in the middle of the signal chain — downstream of the PLC or logic controller and upstream of the load equipment it switches. Understanding where it fits helps avoid wiring errors and wrong-part selections.

  • PLC digital output card (24VDC sourcing or sinking) energizes the CAD32BD coil through a 24VDC control supply circuit.
  • The CAD32BD coil energizes, closing 3NO contacts and opening 2NC contacts simultaneously.
  • NO contacts switch load circuits operating at up to 690VAC or 220VDC — motor starters, solenoid valves, indicator lamps, or downstream relay coils.
  • NC contacts open interlock lines or drop safety signals to upstream controllers or alarm panels.
  • Surge suppression (freewheeling diode across DC coil, or RC snubber on AC load circuits) is installed at the coil terminals and at inductive load terminals as applicable.

Where the CAD32BD Gets Deployed: Industries and Use Cases

In manufacturing automation, the CAD32BD is a standard replacement relay for legacy control panels built to IEC or NEMA machine control standards. Controls engineers routinely specify it for switchgear retrofits, PLC-based machine control upgrades, and new panel builds where the 24VDC logic standard and 10A load rating align with the application.

HVAC and building control systems use this relay class for compressor sequencing, fan motor switching, and multi-zone control logic where a central controller drives multiple independent circuits from a single output. The 45mm compact width allows dense relay banks in HVAC control cabinets where panel space is a constant constraint.

Process and batch manufacturing — pharmaceutical mixing, chemical processing, food and beverage filling lines — rely on the CAD32BD for pump and valve actuation circuits and for alarm and status signaling. The -40°C to +60°C operating range accommodates cold-room installations common in food processing environments.

Conveyor systems and material handling equipment use the relay as an interlock logic device: a conveyor segment cannot start until an upstream segment confirms run status, with NC contacts from the CAD32BD holding the downstream start circuit open until the interlock condition is satisfied.

Application Typical Deployment
Machine control panel retrofit Replacement auxiliary relay in legacy PLC-based switchgear; DIN rail installation with existing 24VDC logic supply
HVAC motor and compressor control Compact relay bank in HVAC control cabinet; multi-zone sequencing from BAS controller 24VDC outputs
Conveyor interlock logic Interlock relay between conveyor segments; NC contacts break downstream start circuit until upstream run is confirmed
Batch process pump and valve actuation Interface between distributed I/O 24VDC output and 480VAC pump motor starter or solenoid valve
VFD and soft-starter pre-control Auxiliary contact extension relay in VFD bypass or pre-charge circuits; 24VDC coil driven by drive enable output
OEM machine builder panel New control panel design for light industrial machinery; standardized 24VDC relay across the machine for UL/CSA compliance

CAD32BD Specifications an Engineer Needs to Make a Purchase Decision

Specification Value
Coil Voltage 24VDC
Contact Configuration 3NO + 2NC (5 poles total)
Contact Current Rating 10A
Maximum Load Voltage (AC) 690VAC (IEC rated); 600VAC (UL/CSA rated)
Maximum Load Voltage (DC) 220VDC
AC Duty Rating AC-15 (general industrial AC)
DC Duty Rating DC-13 (general industrial DC)
Operating Temperature -40°C to +60°C ambient
Mounting / Width 35mm DIN rail / 45mm wide
Certifications UL 508, CSA C22.2 No. 14, CE, IEC 60947-4-3, RoHS, REACH

Full technical specifications are available on the product page at LeadTime.ca.

CAD32BD vs Competitor Equivalents: Which Relay Do You Actually Need?

The table below compares the Schneider Electric CAD32BD directly against the two most commonly cited competitor equivalents at the same contact rating and coil voltage. It also surfaces the key internal TeSys family alternatives for buyers whose application falls outside the CAD32BD's parameters.

Feature Schneider Electric CAD32BD Siemens 3RT2024-1AF00 ABB AF09-04-00-13
Contact Configuration 3NO / 2NC 3NO / 2NC 3NO / 1NC
Coil Voltage 24VDC 24VDC 24VDC
Contact Current Rating 10A at 690VAC 10A at 690VAC 16A at 690VAC
Mounting DIN Rail 35mm DIN Rail 35mm DIN Rail 35mm
Width 45mm 45mm 45mm
Certifications UL / CSA / CE / IEC UL / CSA / CE / IEC UL / CSA / CE / IEC
Contact Material Silver-nickel serrated Per Siemens datasheet Per ABB datasheet
Green Premium / RoHS Yes (Schneider Green Premium) Verify with Siemens Verify with ABB

The key differentiator between the CAD32BD and the ABB AF09-04-00-13 is the NC contact count: the ABB provides only 1NC versus the CAD32BD's 2NC. If your interlock or signaling circuit requires two independent NC outputs, the CAD32BD is the correct choice and the ABB is not a direct drop-in equivalent. If your load current exceeds 10A or you need more than 1NC contact, evaluate accordingly before finalizing the order — check current availability at LeadTime.ca.

Expert Verdict: Is the CAD32BD Worth Ordering?

The Schneider Electric CAD32BD earns its place as a standard stock item in the toolbox of any controls engineer or maintenance shop running 24VDC machine control systems. The combination of silver-nickel serrated contacts — which deliver wiping action and low chattering across the rated cycle life of up to 180 cycles per minute — with a verified operating range of -40°C to +60°C and full UL/CSA/CE/IEC certification makes this a low-risk, high-confidence selection for both new OEM panel builds and legacy system replacements. The Green Premium designation (RoHS 2011/65/EU and REACH 1907/2006 compliant) satisfies environmental procurement requirements at no added complexity. For facilities already standardized on Schneider Electric products, the CAD32BD fits directly into established supplier channels and approval lists without requiring new vendor qualification.

The relay's real constraints are narrow and well-defined. It is 24VDC coil only — there is no workaround for an AC control circuit without external conversion. The 3NO+2NC configuration is fixed; if your circuit needs 4NO contacts, a different suffix in the CAD32 family is the correct path. At 10A maximum contact current, the CAD32BD is not appropriate for motor inrush loads that spike above that threshold — the TeSys K series with higher amperage ratings is the correct alternative in those applications. And while the CAD32BD is widely used in conditional interlock circuits, it carries no safety-relay certification; emergency stop chains and Category 3 or 4 safety functions require dedicated safety-rated hardware.

From a procurement standpoint, the CAD32BD benefits from being a well-established part in the TeSys Deca and TeSys D family with broad distribution across North America and globally. Ordering through a specialist automation distributor rather than a generic marketplace matters most when lead time is a production constraint or when pre-order application confirmation prevents a wrong-part delivery. LeadTime.ca maintains inventory, provides technical pre-sales confirmation, and ships worldwide — check current pricing and stock status for the CAD32BD on the product page.

For volume pricing or to confirm lead time before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the CAD32BD

Community discussion for the Schneider Electric CAD32BD specifically — and the broader TeSys Deca family — is sparse across the major automation forums. That absence does not indicate a trouble-free record; it more accurately reflects that a well-specified, correctly installed relay in this class simply does not generate fault reports. What it does mean is that the most actionable intelligence for first-time buyers and engineers specifying this part on a new project comes from understanding the documented failure patterns that occur when the wrong part is ordered or when installation details are overlooked.

The single most common ordering error in this relay class — and the one that causes the most downstream disruption — is coil voltage mismatch. The suffix BD in the catalog number designates a 24VDC coil with screw clamp terminals. A purchaser working from a bill of materials entry that reads only "CAD32" or who references a different model in the same family can easily receive an AC coil variant. The relay is physically identical; the failure only appears at first power-up when the coil will not energize. Avoiding this requires one step: verify the full model number including the BD suffix against the official Schneider Electric datasheet before the purchase order is submitted, not after delivery.

The second documented risk is contact current undersizing. The CAD32BD is rated at 10A contact current. That figure applies to continuous steady-state current under AC-15 or DC-13 duty. Inrush current on motor loads, solenoids, and transformer primaries regularly exceeds steady-state by a factor of 2 to 6 times. A load drawing 8A running current with a 13A inrush will eventually weld the contacts, typically within the first few dozen cold-start cycles. If your load profile includes any inductive or motor-type inrush, calculate the peak transient and verify it remains within 10A, or step up to a relay with a higher contact rating. For applications where these questions arise during the specification phase, the LeadTime.ca team provides pre-sales technical confirmation before the order is placed — saving the cost of an expedited emergency replacement.

Wiring and Installation Overview

  • De-energize all circuits before installation. Verify zero voltage at control and load terminals with a calibrated multimeter. Apply lockout/tagout per site procedure before touching terminals.
  • Mount to 35mm DIN rail by aligning the relay's bottom clip, then pressing downward until both clips engage firmly. The relay must not rock or slide laterally once seated.
  • Connect 24VDC coil supply to the coil terminals as marked on the relay body and in the manufacturer's wiring diagram. Strip 5–7mm of insulation; insert wire into screw clamp terminal; tighten to approximately 0.8–1.0 N·m. Use wire in the 0.5–2.5mm² (AWG 20–14) range. After tightening, tug lightly on each wire to confirm it is seated.
  • Connect load circuits to the appropriate NO and NC contact terminals per your circuit design. Do not exceed 10A at 690VAC or 220VDC per contact. Label each circuit at the terminal for future maintenance reference.
  • Install surge suppression as required: a freewheeling diode across the DC coil terminals is standard practice on 24VDC coil relays; an RC snubber or MOV may be added at inductive AC load terminals. Refer to manufacturer application notes for suppression device selection. Full wiring procedures are documented in the Schneider Electric TeSys Deca installation manual.

Compatible Accessories and System Expansion

The TeSys Deca and TeSys D product family supports a range of accessories that extend or protect the CAD32BD in panel and machine applications. The following are relevant to buyers evaluating total system cost and compatibility:

  • Surge suppression modules — Schneider Electric offers dedicated coil suppression accessories for TeSys D family relays; confirm the correct accessory reference for 24VDC coil versions with the distributor or manufacturer documentation.
  • DIN rail mounting accessories — Standard 35mm (TS 35) DIN rail and end stops are compatible; no special mounting hardware is required for the CAD32BD's 45mm width.
  • Terminal marking and labeling accessories — Standard DIN rail terminal marking systems are compatible with the screw clamp terminal format on the CAD32BD.
  • Alternative suffix variants in the CAD32 family — CAD32BE provides spring-loaded terminals for vibration-prone installations; other catalog suffixes address AC coil voltages (110VAC, 230VAC) for systems where the control supply is AC line voltage rather than 24VDC.

Wrong-Part Prevention Checklist

Before finalizing a purchase order for the Schneider Electric CAD32BD, work through each item on this checklist. Every item corresponds to a documented ordering or installation failure mode.

  1. Verify coil voltage: This part is 24VDC only. Confirm your control circuit is DC, not AC line voltage.
  2. Confirm contact count: Requires 3NO+2NC (5 poles total). Count contacts needed before ordering.
  3. Check load voltage: Ensure equipment to be switched is 600VAC or 690VAC rated, not higher.
  4. Validate contact current: 10A maximum. Measure actual inrush and steady-state current of the load.
  5. Confirm mounting: DIN rail 35mm standard. Check panel space allows 45mm width.
  6. Verify terminal type: Screw clamp provided. Spring or PCB terminals require different CAD32 suffix.
  7. Check approval certifications: Confirm UL/CSA/CE marks meet your regional and customer requirements.
  8. Confirm lead time: Verify in-stock status with distributor; order surplus stock if cycle time is critical.

If any item on this checklist raises a question about fit, contact the LeadTime.ca team before ordering — confirming application compatibility takes minutes and avoids the cost of a wrong-part return and expedited re-shipment.

Frequently Asked Questions

Can the CAD32BD be used in a safety-rated e-stop or emergency stop circuit?

No. The CAD32BD is a general-purpose industrial control relay and carries no safety relay certification. Emergency stop chains, Category 3 or 4 safety functions, and e-stop circuits under IEC 62061 or ISO 13849 require dedicated safety-rated relays or safety controllers. The CAD32BD may be used in conditional interlock circuits that are not part of a certified safety function, but it must not be specified as the safety-rated switching element in a functional safety design.

My control supply is 24VAC, not 24VDC — will the CAD32BD work?

No. The coil in the CAD32BD is rated for 24VDC only. Applying 24VAC will result in either no operation or coil damage, depending on the transient voltage level. If your control supply is 24VAC, order the corresponding AC coil variant from the CAD32 family. Verify the full catalog suffix against the Schneider Electric datasheet before placing the order.

What is the electrical contact life of the CAD32BD, and does it vary by load type?

Manufacturer documentation specifies electrical contact life of 100,000 to 500,000 cycles at rated AC-15 or DC-13 duty per IEC 60947-4-3 testing standards. The range reflects the significant impact of load type: resistive loads at the lower end of rated current will achieve the higher cycle count, while inductive or capacitive loads near the 10A maximum will reduce contact life toward the lower end of the range. Mechanical life — without electrical load — is rated at 2 million cycles or more.

Is the CAD32BD a direct replacement for TeSys D series auxiliary relays with the same catalog suffix?

The TeSys Deca family is the current generation successor to the TeSys D series, and Schneider Electric has designed the form factor to maintain compatibility with existing DIN rail installations. The CAD32BD shares the same 45mm width and 35mm DIN rail mounting as its TeSys D predecessors. Verify terminal pinout and wiring diagram against your existing installation before treating any replacement as a guaranteed drop-in; manufacturer documentation should be the authoritative reference for specific footprint and wiring compatibility.

What does the operating cycle rating of 180 cycles per minute mean in practice?

The 180 cycles per minute figure represents the maximum mechanical switching rate under favorable conditions — stable 24VDC supply, no shock loads on the contacts, and clean contact surfaces. In typical machine control and HVAC applications, actual cycle rates are far below this limit. This rating becomes relevant only in high-frequency switching applications such as rapid pulse control or fast-scan PLC output cycling, where exceeding the rated cycle rate accelerates mechanical wear and reduces service life.

Does the CAD32BD require an external surge suppression device on the coil?

On 24VDC coil circuits, a freewheeling diode installed across the coil terminals is standard practice in industrial wiring to suppress the voltage spike generated when the coil de-energizes. Without it, the transient can damage the PLC output card driving the relay. Some panel designs use a resistor-diode combination instead of a diode alone to improve drop-off speed. Refer to Schneider Electric application notes and your PLC output card specifications for the recommended suppression method for your specific circuit.

Why Order the CAD32BD Through LeadTime.ca

  • LeadTime.ca ships worldwide — the CAD32BD is available to buyers in any region, not limited to a single market or geography.
  • Pre-sales technical support confirms application fit before the order is placed, reducing wrong-part returns on coil voltage, contact configuration, and current rating questions.
  • Volume pricing and bulk order support are available — contact the team directly for multi-unit pricing on OEM builds, panel shop orders, and MRO stocking programs.
  • Hard-to-source and short lead time scenarios: when standard distributor channels show extended backorder, a specialist distributor can identify in-stock inventory faster than a general marketplace search.

CAD32BD At-a-Glance Summary

  • Official product name: TeSys Deca Control Relay, 3NO+2NC, 690V, 24V DC Standard Coil
  • Coil voltage: 24VDC only — no AC coil option in this catalog number
  • Contact configuration: 3 normally open + 2 normally closed (5 poles total)
  • Contact current rating: 10A maximum
  • Maximum load voltage: 690VAC (IEC) / 600VAC (UL/CSA) / 220VDC
  • AC duty: AC-15; DC duty: DC-13 per IEC 60947-4-3
  • Operating temperature: -40°C to +60°C ambient
  • Mounting: 35mm DIN rail; 45mm wide; screw clamp terminals (0.5–2.5mm², 0.8–1.0 N·m torque)
  • Dimensions: 76.8mm H × 45mm W × 92.9mm D; weight 0.58 kg
  • Max switching rate: up to 180 cycles per minute under favorable conditions
  • Electrical contact life: 100,000–500,000 cycles at rated duty; mechanical life 2+ million cycles
  • Certifications: UL 508, CSA C22.2 No. 14, CE, IEC 60947-4-3, RoHS 2011/65/EU, REACH 1907/2006 (Green Premium)
  • Not suitable for: AC coil circuits, contact configurations other than 3NO+2NC, loads above 10A inrush, or certified safety relay applications

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