Schneider NSYCCOTHO — ClimaSys CC Thermostat Buying Guide

By Abdullah Zahid
13 min read
Schneider Electric NSYCCOTHO ClimaSys CC bimetal thermostat mounted on DIN rail inside industrial electrical enclosure

Schneider Electric NSYCCOTHO ClimaSys CC Simple Thermostat — Specifications, Wiring, and Selection Guide

Controls engineers and panel builders searching for the Schneider Electric NSYCCOTHO thermostat are typically at the final verification stage — they have identified the ClimaSys CC family as the right product category and now need to confirm that this specific model matches their enclosure voltage, switching load, and mounting constraints before committing to a purchase. The NSYCCOTHO is a bimetal-sensor thermostat rated at 10 A at 250 VAC with a 0–60°C setpoint range, designed for simple on-off control of fans, contactors, and alarm devices inside industrial electrical enclosures — no programming, no external controller, no commissioning required.

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

Who Should Buy the NSYCCOTHO — and Who Shouldn't

The NSYCCOTHO is the correct choice for engineers and panel builders who need a mechanically simple, no-commissioning thermal switch for enclosure fan or alarm control. This model is right for your application if all of the following are true:

  • Your electrical supply is 250 VAC AC — this model does not operate on DC or low-voltage AC supplies
  • Your switching load is within 10 A at 250 VAC for resistive loads, or 2 A at 120–250 VAC for inductive loads at 0.6 pf
  • Your target temperature setpoint falls within the 0–60°C adjustment range
  • Enclosure ambient operating conditions remain within -20 to +80°C
  • A normally open (NO) contact configuration satisfies your relay logic — this model has no NC contact option
  • DIN rail, plate, or cross-rail mounting is available in your enclosure layout

If you require a programmable or remotely adjustable setpoint, multiple temperature stages, or integrated monitoring output, the NSYCCOTHO is not the right choice. In those cases, evaluate the NSYEC or NSYE electronic thermostat variants from the ClimaSys CC family before ordering.

On this page:

What the NSYCCOTHO Actually Does in Your Enclosure

The Schneider Electric NSYCCOTHO ClimaSys CC Simple Thermostat functions as a standalone temperature switch. Its bimetal sensor responds mechanically to rising air temperature inside an electrical enclosure — no electronics, no firmware, no external power supply beyond the 250 VAC switching circuit itself. When the enclosure air temperature reaches the dialed setpoint (anywhere from 0 to 60°C), the bimetal strip deflects and closes the single normally open (NO) relay contact, energizing whatever load is wired downstream — typically a fan motor contactor, a cooling unit relay coil, or an alarm indicator.

The mechanical simplicity is intentional and is one of the primary reasons this model is specified over electronic alternatives. There is no startup sequence, no calibration software, and no risk of firmware corruption. The 100,000-cycle bimetal sensor life rating means that at a typical duty cycle of 27 actuations per day, the device is rated for approximately a decade of continuous service. UL listing and UL94 V0 flammability rating of the polycarbonate housing confirm compliance with North American electrical code and fire safety requirements. RoHS compliance covers international export requirements for most global markets.

The IP20 protection rating means this thermostat is appropriate for clean, dry indoor enclosures. It is not sealed against water ingress and is not suitable for outdoor installations or wash-down environments without additional protective housing.

Where the NSYCCOTHO Sits in a Typical Control System

The NSYCCOTHO sits at the sensing and switching layer of an enclosure thermal management circuit — downstream of the panel power distribution and upstream of the cooling load or alarm device it controls.

  • 250 VAC panel supply feeds directly to the NSYCCOTHO terminal block (Terminal 1 and Terminal 2)
  • NSYCCOTHO NO contact output (Terminals 3 and 4) connects to the coil of a motor contactor or intermediate relay
  • The contactor or relay then switches the full motor load — fan motor, compressor, or cooling unit — independently of the thermostat contact
  • Alarm output variant: the NO contact drives an indicator lamp or alarm relay coil directly when the setpoint is reached
  • All wiring uses 2.5 mm² wire maximum at the thermostat terminal clamps; downstream protection via circuit breaker or thermal overload per local electrical code

Typical Applications for the NSYCCOTHO

The most common deployment for the NSYCCOTHO is fan activation in motor control centers and machine control panels. As drive components and contactors dissipate heat during high-load operation, the thermostat detects rising internal air temperature and closes its contact, energizing the cooling fan contactor. The fan runs until the enclosure cools below the setpoint hysteresis band, then the bimetal reopens the contact.

In sealed electrical cabinets — particularly those housing variable frequency drives or power supplies — the NSYCCOTHO provides ventilation triggering without requiring any PLC input or programmed logic block. This is valuable in retrofit or upgrade projects where adding a thermostat function to an existing PLC program is impractical.

Alarm signal triggering is the second most common use case. Wired in series with an indicator lamp or connected to an alarm relay coil, the NSYCCOTHO provides a high-temperature warning when enclosure air exceeds the setpoint — relevant in telecommunications rooms, transformer rooms, and process control installations where thermal events need to be flagged without full supervisory control infrastructure.

The NSYCCOTHO is also used in compressor and chiller activation circuits, where a temperature threshold triggers a cooling cycle, and in transformer or reactor thermal management applications where a simple switching response to a temperature threshold is the entire functional requirement.

Application Typical Deployment
Motor control center (MCC) fan cooling Thermostat controls fan contactor coil; fan activates at setpoint temperature
Sealed machine cabinet ventilation NO contact triggers ventilation relay; no PLC input required
High-temperature alarm indication NO contact closes alarm lamp or relay coil circuit at setpoint
Compressor or chiller activation Thermostat energizes compressor starter contactor coil at threshold
Telecommunications equipment room Passive thermal switch activates supplemental cooling without network control
Transformer and reactor enclosures Simple on-off switching for cooling fan based on winding area air temperature

Key Specifications and Switching Ratings

Specification Value
Supply Voltage 250 VAC (AC only — not suitable for DC circuits)
Switching Capacity — Resistive 10 A at 250 VAC
Switching Capacity — Inductive 2 A at 120–250 VAC at 0.6 pf
Contact Configuration 1 NO (normally open) — no NC option on this model
Contact Resistance <10 mohm
Temperature Setpoint Range 0–60°C (user-adjustable via dial)
Operating Temperature Range -20 to +80°C
Sensor Type / Cycle Life Bimetal strip — 100,000 mechanical cycles
Dimensions (H x W x D) 68 mm x 33 mm x 44 mm
Mounting / Compliance DIN rail, plate, cross-rail / UL listed, UL94 V0, RoHS, PROP65

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

NSYCCOTHO vs. Electronic Thermostat: Which Do You Actually Need?

The decision between the NSYCCOTHO and an electronic thermostat variant like the NSYEC comes down to three practical questions: Do you need a fixed setpoint or adjustable remote control? Do you need ±3°C mechanical accuracy or tighter electronic accuracy? And do you need the device commissioned and connected in minutes, or can you allocate time for programming and parameter setup?

Feature NSYCCOTHO (Bimetal) NSYEC (Electronic)
Setpoint Adjustment Fixed dial, 0–60°C Programmable / remote
Accuracy ±3°C typical (mechanical) ±1°C (electronic)
Commissioning Time None Requires programming
Cost Lower Higher
Electrical Complexity Simple relay — no powered electronics Powered electronics required
Cycle Life 100,000 mechanical cycles Longer (electronic switching)
Monitoring / Alarm Output No Yes

If your application requires a remotely adjustable setpoint, integrated alarm output, or tighter than ±3°C temperature control, the NSYEC or NSYE electronic thermostat variants are the correct specification. For a fixed setpoint, no-commissioning fan or alarm circuit, the NSYCCOTHO is the faster and more cost-effective path — check current availability at LeadTime.ca.

Expert Verdict: Is the NSYCCOTHO the Right Thermostat for Your Project?

The NSYCCOTHO earns its place in industrial panel design by doing exactly one thing with complete mechanical reliability: it detects enclosure air temperature via a bimetal sensor and closes a single NO contact when the dial setpoint is reached. For electrical contractors, panel builders, and OEM manufacturers who need a thermal switch that installs in minutes, requires zero commissioning, and delivers 100,000-cycle reliability without any electronics to fail, this is the correct specification. The compact 68 mm x 33 mm x 44 mm DIN rail footprint fits even tight MCC bay layouts, and UL listing with UL94 V0 housing satisfies North American code compliance without additional documentation work. The 10 A at 250 VAC resistive switching capacity covers direct contactor coil control for most standard cooling fan circuits.

The NSYCCOTHO has real limits that should be stated plainly. It offers no NC contact option — if your relay logic requires a normally closed fail-safe circuit, you will need an additional relay stage or a different thermostat model entirely. The inductive load derating to 2 A at 0.6 pf means you cannot directly switch most fractional-horsepower motor loads without an intermediate contactor. And the ±3°C mechanical accuracy of the bimetal sensor is adequate for enclosure cooling but not appropriate for temperature-sensitive process control where tight setpoint precision matters. Applications requiring programmable setpoints, multi-stage temperature control, remote monitoring, or data logging should be directed to the NSYEC or NSYE electronic thermostat family instead.

From a procurement standpoint, the NSYCCOTHO is a passive mechanical component that stocking distributors carry consistently — typical lead times align with standard industrial hardware availability. Ordering through a specialist industrial distributor rather than a generic channel gives you access to pre-sale technical support to confirm voltage and load compatibility, application-specific wiring guidance, and warranty backup if the device has been misapplied. Both the SKU number (2232268) and UPC (00785901753797) are available for distributor cross-reference and inventory lookup. View current pricing and stock status at LeadTime.ca — we ship worldwide.

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 NSYCCOTHO

Community forum discussion specific to the NSYCCOTHO is limited — this is a passive mechanical component that tends to be specified, installed, and forgotten rather than discussed at length in automation forums. That said, the technical risks that generate the most pre-purchase questions are well-documented in the product specifications, and three ordering mistakes appear consistently enough across the ClimaSys CC product family to warrant detailed attention before you commit to a purchase.

The most consequential mistake is supply voltage mismatch. The NSYCCOTHO is rated for 250 VAC AC only. It will not operate correctly on 120 VAC or any DC supply voltage. Engineers working on North American panels sometimes assume a thermostat rated at 250 VAC will also function at 120 VAC — it will not. Before ordering, measure the actual supply voltage at the terminal block where the thermostat will connect, and confirm it against the 250 VAC rating. This is not a bilingual-voltage device.

The second recurring issue is relay contact overloading, specifically connecting an inductive motor load directly to the thermostat NO contact without an intermediate contactor. The 10 A at 250 VAC rating applies to resistive loads only. Inductive loads — including motor windings and contactor coils with low power factors — are limited to 2 A at 0.6 pf. Engineers who read only the resistive rating and wire a motor directly to the thermostat contact will see contact erosion and premature failure within months of installation. The correct approach is to use the NSYCCOTHO to switch a contactor coil (typically within the 1–2 A inductive range), and let the contactor carry the full motor load. When community data is sparse and the manufacturer datasheet is the primary reference, a specialist distributor at LeadTime.ca can confirm your specific load and wiring configuration before the part ships.

Wiring and Installation Overview

The NSYCCOTHO installs on a standard 35 mm DIN rail and connects via a 4-terminal block accepting 2.5 mm² wire. The following points summarize the key requirements for a correct installation — full wiring diagrams and terminal torque specifications are available in the Schneider Electric ClimaSys CC product documentation.

  • Mount on a 35 mm DIN rail by hooking the rear clip onto the top edge and rotating the body down until the clip seats firmly; plate mount and cross-rail alternatives are also supported
  • Supply 250 VAC AC to Terminal 1 (line in); connect the neutral return to Terminal 2 — confirm zero voltage on the supply before connecting any terminals
  • Connect Terminal 3 (NO contact output) to the input coil of the motor contactor or alarm relay; connect Terminal 4 (NO contact return) to the neutral busbar
  • Use 2.5 mm² minimum wire gauge at all terminals; verify all connections are fully seated with no loose strands
  • Position the thermostat to sense representative enclosure air temperature — avoid mounting directly adjacent to heat-generating components or in dead-air pockets where thermal response will be delayed

Wrong-Part Prevention Checklist

Before finalizing your order for the NSYCCOTHO, verify every item on this checklist against your enclosure design documents and nameplate data:

  1. Verify supply voltage is 250 VAC AC (not DC; this model is AC-only)
  2. Confirm load switching capacity is adequate: 10 A at 250 VAC for resistive loads, 2 A at 120-250 VAC for 0.6 pf inductive loads
  3. Check that setpoint range 0-60°C covers your target temperature band
  4. Confirm operating temperature range -20 to +80°C matches enclosure ambient conditions
  5. Verify NO (normally open) contact configuration is required; this model does not offer NC contact
  6. Ensure mounting space accommodates DIN rail or plate mount; thermal stacking must be considered when placing multiple devices

If any item on this checklist cannot be confirmed against your specifications, contact the LeadTime.ca team before ordering — we can help verify compatibility and identify the correct variant if the NSYCCOTHO does not match your requirements.

Frequently Asked Questions

Can the NSYCCOTHO be used on a 120 VAC supply circuit?

No. The NSYCCOTHO is rated for 250 VAC AC only. Connecting it to a 120 VAC or any DC supply is outside the product specification and will result in incorrect operation. If your enclosure supply is 120 VAC, verify the appropriate ClimaSys CC variant for your voltage before ordering.

What happens if I connect a motor load larger than the rated switching capacity directly to the NO contact?

Exceeding the rated switching capacity — particularly with inductive loads above 2 A at 0.6 pf — will cause accelerated contact erosion and premature failure of the relay contact. The correct approach is to wire the NSYCCOTHO to switch a motor contactor coil (typically within the 1–2 A inductive range) rather than switching the motor load directly. The contactor then carries the full motor current.

Is there a normally closed (NC) version of the NSYCCOTHO?

No. The NSYCCOTHO provides a single normally open (NO) contact only — the contact is open when the enclosure temperature is below the setpoint and closes when the setpoint is reached. If your circuit requires a normally closed configuration, you will need to add a separate NO/NC relay stage downstream, or specify a different thermostat model. Contact LeadTime.ca to identify the appropriate alternative.

How do I adjust the temperature setpoint after installation?

The setpoint is adjusted using the dial on the front face of the NSYCCOTHO. A small flathead screwdriver is used to turn the dial within the 0–60°C range — clockwise increases the setpoint, counterclockwise decreases it. After adjustment, allow the enclosure temperature to stabilize and observe contact actuation to confirm the new setpoint is functioning as intended. Mark the dial position on the enclosure label for future reference.

Does the NSYCCOTHO require any programming or configuration before use?

No programming or commissioning is required. The bimetal sensor is entirely mechanical — it responds to air temperature through physical deflection and closes the NO contact at the dialed setpoint. Set the dial to the target temperature, verify wiring, and the device is operational. This is one of the primary reasons the NSYCCOTHO is selected over electronic thermostat variants in applications where installation speed and simplicity are priorities.

What is the expected service life of the NSYCCOTHO bimetal sensor?

The bimetal sensor is rated for 100,000 mechanical cycles. At a typical actuation rate of approximately 27 cycles per day, this corresponds to roughly a decade of continuous service. Actual service life will vary based on load type, switching frequency, and enclosure operating conditions. The 100,000-cycle rating is sourced from Schneider Electric's official ClimaSys CC family documentation.

Why Order From LeadTime.ca

  • Ships worldwide — orders placed through LeadTime.ca are not restricted to any single country or region
  • Pre-sale technical support to verify voltage, load capacity, and mounting compatibility before your order ships
  • SKU 2232268 and UPC 00785901753797 available for direct cross-reference and inventory lookup
  • Volume pricing available for OEM and panel builder orders — contact for current pricing on multi-unit requirements
  • Specialist industrial focus means faster identification of correct variants when the standard model does not match your specification

At-a-Glance Summary

  • Model: Schneider Electric NSYCCOTHO — ClimaSys CC Simple Thermostat
  • Supply voltage: 250 VAC AC only — no DC, no low-voltage AC
  • Resistive switching capacity: 10 A at 250 VAC
  • Inductive switching capacity: 2 A at 120–250 VAC at 0.6 pf
  • Contact type: 1 NO (normally open) — no NC option on this model
  • Setpoint range: 0–60°C via front-panel dial
  • Operating temperature: -20 to +80°C
  • Sensor: bimetal strip — 100,000 mechanical cycle life rating
  • Dimensions: 68 mm x 33 mm x 44 mm
  • Mounting: DIN rail, plate mount, or cross-rail
  • Compliance: UL listed, UL94 V0 flammability, RoHS, PROP65
  • IP rating: IP20 — clean indoor enclosures only
  • Electrical connection: 4-terminal block, 2.5 mm² wire capacity
  • SKU: 2232268 / UPC: 00785901753797

You may also be interested in: