Siemens ep1332-4ba00

By Abdullah Zahid
13 min read
Siemens 6EP1332-4BA00 SIMATIC PM 1507 24V 3A stabilized power supply module mounted on S7-1500 DIN rail

Siemens 6EP1332-4BA00 SIMATIC PM 1507 24 V/3 A Stabilized Power Supply for SIMATIC S7-1500 — Full Specifications, Selection Guide, and Procurement Review

Controls engineers specifying a new S7-1500 panel or replacing a failed power supply module need one answer fast: is the Siemens 6EP1332-4BA00 the right part for this system, and is it available now? This is the SIMATIC PM 1507 24 V/3 A stabilized power supply module — a rail-mounted DC supply that converts 120/230 V AC mains to 24 V DC at 3 A continuous output, integrating directly into the S7-1500 hardware stack without any external power supply cabinet. At 50 mm wide and 0.45 kg, it fits the standard DIN 35 rail alongside the CPU and I/O modules, and its MTBF of 1,611,993 hours at 40°C reflects the reliability this platform demands.

If you have already confirmed this is the correct part for your S7-1500 system, check current pricing and availability for the 6EP1332-4BA00 at LeadTime.ca — ships worldwide.

Who Should Buy the 6EP1332-4BA00 — and Who Shouldn't

The Siemens 6EP1332-4BA00 is the correct choice when all of the following are true for your project:

  • Your main controller is an S7-1500 CPU — not an S7-1200, S7-300, or S7-400, each of which uses a different power supply form factor and pinout.
  • Your total 24 V DC current draw across all modules, field devices, and wiring — including CPU, digital I/O, solenoids, and sensors — is confirmed at or below 3 A continuous.
  • Your AC mains supply falls within 95–264 V AC (50/60 Hz); the module selects the correct range automatically, covering both 120 V North American and 230 V international standards.
  • Your cabinet DIN rail installation provides at least 40 mm of clear space above and below the module, as required by the mechanical specification.
  • UL 508 and CSA C22.2 No. 142 certification is required, or ATEX II 3G Ex nA nC IIC T4 Gc approval is relevant to your installation zone.
  • A minimum 20 ms hold-up time on mains failure is sufficient to sustain CPU operation through brief power interruptions in your application.

If your system load exceeds 3 A, select the 6EP1332-4BA10 (6 A) or 6EP1332-5BA00 (10 A) instead. If continuous operation through extended mains failure is required, a battery-backed or redundant supply topology is the correct path.

On this page:

What the 6EP1332-4BA00 Actually Does in an S7-1500 System

The Siemens 6EP1332-4BA00 is the primary power source for the S7-1500 modular rail system. Its official product descriptor is the SIMATIC PM 1507 24 V/3 A Stabilized Power Supply, and it belongs to the SIMATIC S7-1500 Automation System family. Where an external bench power supply feeds loose field devices, this module is the integrated answer — it mounts directly on the same DIN 35 rail as the CPU and I/O modules and delivers 24 V DC at up to 3 A continuously to all downstream automation logic and field wiring in the panel.

The design is specifically optimized for S7-1500 system requirements. Soft-start behavior prevents inrush current at startup, with a maximum response delay of 1.5 seconds and a voltage rise time of 10 ms. Output ripple is held to a maximum of 50 mV peak, and voltage control precision is 0.1% under ±15% input voltage fluctuation — which matters in facilities where mains quality is variable. Electronic short-circuit protection with automatic restart at a typical 3.4 A threshold protects field devices without requiring manual intervention after a transient fault. The internal non-accessible fuse is rated T 3.15 A / 250 V, and an external circuit breaker — either 10 A characteristic B or 6 A characteristic C — is mandatory on the AC input side; this module does not include an integrated circuit breaker.

Galvanic isolation between the AC input and 24 V DC output provides the Safety Extra-Low Voltage (SELV) classification per EN 60950-1, EN 50178, and EN 61131-2, with maximum leakage current of 3.5 mA. The physical footprint is 50 mm wide × 147 mm high × 129 mm deep, weighing 0.45 kg, with IP20 protection and Class I operating classification. No separate power supply cabinet is needed; this is a fully integrated component of the S7-1500 hardware stack.

Typical S7-1500 Power Architecture Using This Module

The 6EP1332-4BA00 sits at the head of the S7-1500 rail, converting facility AC power into the stable 24 V DC bus that every downstream component in the panel depends on. Here is how the typical component chain looks:

  • Facility AC mains (120 V or 230 V, 50/60 Hz) feeds the panel main disconnect, which includes the mandatory external circuit breaker (10 A characteristic B or 6 A characteristic C).
  • The 6EP1332-4BA00 mounts first on the DIN 35 rail, receives AC input at L, N, and PE terminals, and outputs 24 V DC on L+ and M spring-loaded terminals.
  • The S7-1500 CPU module mounts adjacent on the rail and draws its control power from the 24 V DC bus established by the power supply module.
  • Digital I/O modules, analog I/O modules, and communication modules populate the rail to the right of the CPU, each drawing from the same 24 V DC supply.
  • Field devices — sensors, solenoids, indicators, and actuators — are wired from the output terminals or I/O module power rails, with total current draw constrained to the 3 A module capacity.

Industries and Use Cases Where This Module Is Specified

Packaging machinery OEMs and system integrators working with the S7-1500 platform are among the most frequent specifiers of the 6EP1332-4BA00. A compact control cabinet powering a filling or labeling line typically draws well under 3 A across the CPU, a handful of digital I/O modules, and a set of proximity sensors — exactly the load profile this module is rated for.

Material handling and conveyor systems in automotive sub-assembly environments regularly use the S7-1500 for zone logic and PLC-based safety interlocking. The 6EP1332-4BA00 appears in these builds when the field device load per panel is limited — for example, a conveyor section controller with discrete outputs driving relay coils rather than high-current motor starters.

The module also serves system upgrade projects, where a plant is migrating from S7-300 or S7-400 to S7-1500 and needs to specify all-new components including the power supply. The automatic 95–264 V AC input range selection simplifies deployment across facilities with different local mains standards — a meaningful advantage for multinational OEMs building identical panels for sites in North America, Europe, and Asia.

Field replacement is a high-frequency use case. When an existing S7-1500 power supply fails — identifiable by a red LED on the module face — procurement teams need a confirmed drop-in replacement with known availability. The 6EP1332-4BA00 has been in the Siemens portfolio since 2013, making it a stable catalog item for spares stocking and emergency sourcing.

Application Typical Deployment
New S7-1500 system build-out OEM or integrator specifying integrated power supply module for control cabinet with light to moderate I/O load
Field replacement Technician replacing failed S7-1500 power supply module; drop-in replacement on existing DIN rail
S7-300/S7-400 to S7-1500 upgrade Full hardware refresh requiring new power supply, CPU, and I/O modules on S7-1500 rail
Capacity verification before I/O expansion Integrator adding modules to existing cabinet; confirming 3 A budget before committing to expansion
Multinational OEM standardization Single panel design deployed globally; 95–264 V AC auto-range eliminates region-specific variants
Food, beverage, and packaging lines Compact S7-1500 panel controlling filling, labeling, or conveyor logic with discrete I/O

Purchase-Decision Specifications and Variant Comparison

Specification Value
Rated Output Voltage 24 V DC
Rated Output Current 3 A
AC Input Voltage Range 95–264 V AC, automatic range selection, 50/60 Hz
Max Output Power (typical) 72 W
Output Ripple (max) 50 mV peak
Buffering Time on Mains Failure 20 ms minimum (at 93/187 V)
Short-Circuit Protection Electronic shutdown, automatic restart at typical 3.4 A
Dimensions (W × H × D) 50 × 147 × 129 mm
MTBF at 40°C 1,611,993 hours
Certifications CE, UL 508, CSA C22.2 No. 142 (cULus File E143289), ATEX II 3G Ex nA nC IIC T4 Gc, CB

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

Model Output Current Typical Use Case Pricing Tier
6EP1332-4BA00 3 A Small to mid-size S7-1500 systems with light I/O and field device load Base tier
6EP1332-4BA10 6 A Medium to large systems; solenoids, motors, higher steady-state draw +20–30% above base
6EP1332-5BA00 10 A High-load industrial systems with many analog modules or external device loads +50–80% above base
External 24 V supply Variable (5–40 A+) Redundancy, UPS buffering, non-S7-1500 PLC systems Highly variable

If your S7-1500 system load is confirmed at or below 3 A and you need the certified integrated form factor, the 6EP1332-4BA00 is the correct choice — check current stock and pricing at LeadTime.ca.

Expert Verdict: When This Module Earns Its Place — and When It Doesn't

The Siemens 6EP1332-4BA00 does exactly what a well-specified power supply module should do: it disappears into the panel. At 50 mm wide, it occupies minimal rail space, requires no external power supply cabinet, and delivers a stable 24 V DC bus with 0.1% control precision that the S7-1500 CPU and I/O modules can rely on through normal mains fluctuations. The 87% efficiency figure and 11 W typical power loss at rated load keep thermal management simple. For OEMs building S7-1500-based machines at volume, the pre-certified UL 508 and CSA C22.2 No. 142 approval covering both Canadian and U.S. standards — under cULus File E143289 — removes a compliance step that would otherwise require third-party testing. The MTBF of 1,611,993 hours at 40°C is the kind of number that justifies stocking a spare rather than keeping it as a critical single point of failure.

Where this module reaches its limits is straightforward and worth stating clearly. The 3 A rating is a hard ceiling, not a guideline. Engineers who skip the current budget calculation before ordering, then find the module cycling into short-circuit protection under load, face a replacement order rather than a configuration fix. If your total 24 V DC draw — modules, sensors, solenoids, indicators — approaches or exceeds 3 A, move to the 6EP1332-4BA10 (6 A) without compromise. Similarly, the 20 ms hold-up time on mains failure is adequate for brief transients but is not a substitute for a battery-backed or redundant supply if continuous operation during extended outages is a system requirement. The module also carries no IECEx or cCSAus Class 1 Division 2 certification — if your installation falls in a classified hazardous area, that path requires a different part number.

From a procurement standpoint, the 6EP1332-4BA00 is a stable catalog item that has been in the Siemens portfolio since 2013. Standard lead times through authorized channels typically run within a few business days for stocked inventory, though semiconductor supply disruptions have historically pushed lead times to 8–12 weeks during peak demand periods. For planned builds, ordering ahead of the project schedule is sound practice. Volume pricing and bundled sourcing with other S7-1500 components — CPU modules, I/O modules, communication modules — are options worth discussing directly with a distributor. If you have confirmed compatibility, view current stock and pricing for the 6EP1332-4BA00 at LeadTime.ca.

For volume pricing, confirmed lead time before a build commitment, or sourcing support across multiple S7-1500 components, contact the LeadTime.ca team directly — we ship worldwide.

Wiring and Installation Overview for the 6EP1332-4BA00

The following points cover the key requirements and constraints for wiring and mounting this module. Engineers needing full step-by-step procedures should refer to the official Siemens product manual.

  • AC input is terminated at three screw terminals — L (phase), N (neutral), and PE (ground) — accepting 0.5–2.5 mm² wire; the input terminal block is removable for replacement without rewiring the cabinet.
  • 24 V DC output is terminated at L+ and M spring-loaded terminals, also accepting 0.5–2.5 mm² wire; the output terminal block is similarly removable.
  • An external circuit breaker rated 10 A characteristic B or 6 A characteristic C must be installed on the AC input before the module; the 6EP1332-4BA00 does not include an integrated circuit breaker, and the internal fuse (T 3.15 A / 250 V) is non-accessible.
  • The module mounts on a standard DIN 35 rail and requires 40 mm of clear space above and below; left and right clearance to adjacent modules is 0 mm, but thermal airflow above and below must not be obstructed.
  • PE (protective earth ground) must be solidly connected to the facility ground electrode; the output is SELV-classified with galvanic isolation, but proper grounding of the input side is required per local electrical codes including CSA and NFPA 70.

What Engineers Get Wrong When Ordering This Part

Before placing an order for the Siemens 6EP1332-4BA00, confirm every item on this checklist. These are the eight failure modes that generate mis-orders, field replacements, and integration rework:

  1. Verify that your main controller is an S7-1500 CPU, not S7-1200, S7-300, or S7-400 (those use different power supply modules).
  2. Confirm your AC mains supply is within 120/230 V range; if fixed 120 V or 230 V only is available, this unit still accommodates via automatic range selection.
  3. Check total 24 V DC current draw of all modules, field devices, and solenoids; if it exceeds 3 A, select the 6EP1332-4BA10 (6 A) or 6EP1332-5BA00 (10 A).
  4. Do not use this module for non-S7-1500 applications; it is purpose-built for S7-1500 rail mounting and logic.
  5. Ensure DIN rail spacing allows 40 mm above and below the module; if mounted in a cramped cabinet, use a separate external power supply instead.
  6. Verify that the power supply is not damaged or recalled; check Siemens support documentation for known issues with batch years 2013 and later.
  7. Confirm that your cabinet design includes an external circuit breaker or fuse rated 10 A (characteristic B) or 6 A (characteristic C) on the AC input; this power supply does not have an integrated circuit breaker.
  8. Ensure grounding: L, N, and PE (ground) terminals must be properly connected to your facility's electrical infrastructure per local electrical codes.

If any item on this checklist raises a question before you order, contact the LeadTime.ca team — or review the full product documentation on the product page before confirming your purchase.

Frequently Asked Questions

Can the 6EP1332-4BA00 replace a failed S7-1500 power supply without any configuration changes?

Yes. The 6EP1332-4BA00 is a direct drop-in replacement on the S7-1500 DIN rail. It requires no software configuration — it is a hardware module that provides 24 V DC to the system as soon as AC mains power is applied and the green LED confirms output is active. Verify that the replacement unit matches the original part number and that all terminal connections are re-made per the wiring specification before re-energizing.

How do I calculate whether 3 A is enough for my S7-1500 system?

Sum the nominal 24 V DC current draw of every S7-1500 module in your build — CPU, each digital and analog I/O module, and communication modules — from their individual datasheets. Add the rated current of all field devices powered from the 24 V bus, including solenoids, sensors, and indicators. Apply a 20% startup margin and a 10% safety factor to the total. If the result is below 3 A, the 6EP1332-4BA00 is sufficient. If it approaches or exceeds 3 A, specify the 6EP1332-4BA10 (6 A).

Is the 6EP1332-4BA00 approved for use in Canada and the United States?

Yes. The module carries UL 508 and CSA C22.2 No. 142 approvals under cULus File E143289, covering both U.S. and Canadian certification requirements for industrial control equipment. The 95–264 V AC automatic input range selection also accommodates both 120 V (North American) and 230 V mains standards without any hardware modification.

What does a red LED on the 6EP1332-4BA00 indicate, and how is it resolved?

A red LED indicates a fault state — most commonly caused by AC input voltage outside the 95–264 V AC range, a short circuit on the 24 V DC output, or an internal fault. The correct first step is to power off the AC mains breaker, verify AC input voltage with a multimeter, and inspect all output wiring for short circuits. After clearing the fault condition, restore AC power. If the red LED persists after input voltage is confirmed within range and output wiring is verified clear, replace the module.

Does the 6EP1332-4BA00 provide any protection if a field device shorts out?

Yes. The module includes electronic short-circuit protection that shuts down the output when current reaches the typical 3.4 A threshold, then automatically restarts once the fault condition is cleared. This protects field devices and the S7-1500 modules from sustained fault current without requiring manual reset of the power supply in most transient fault scenarios.

What is the lead time for the 6EP1332-4BA00 and can it be sourced internationally?

The 6EP1332-4BA00 has been a standard catalog item since 2013 and is available through authorized Siemens distributors worldwide. Standard lead times are typically within a few business days when stock is held. During periods of supply chain pressure, lead times can extend to 8–12 weeks. LeadTime.ca ships worldwide — contact the team for current availability and lead time confirmation before committing to a project schedule.

Why Source the 6EP1332-4BA00 from LeadTime.ca

  • LeadTime.ca ships the Siemens 6EP1332-4BA00 and related S7-1500 components worldwide — no geographic restrictions on order fulfillment.
  • Hard-to-source or time-sensitive parts in the SIMATIC S7-1500 family can be confirmed for availability before you commit to a project schedule.
  • Volume pricing and multi-line S7-1500 orders — including CPU modules, I/O modules, and communication modules alongside power supplies — can be quoted in a single transaction.
  • Technical sourcing support is available for engineers who need to confirm compatibility or select the correct variant (3 A vs. 6 A vs. 10 A) before ordering.

At-a-Glance Summary

  • Official product name: SIMATIC PM 1507 24 V/3 A Stabilized Power Supply; catalog number 6EP1332-4BA00
  • Output: 24 V DC at 3 A continuous, 72 W typical maximum, 50 mV peak ripple, 0.1% voltage control precision
  • Input: 95–264 V AC automatic range selection, 50/60 Hz, covers 120 V and 230 V mains standards
  • Hold-up time on mains failure: 20 ms minimum at 93/187 V — adequate for transient protection, not extended outage backup
  • Short-circuit protection: electronic shutdown with automatic restart at typical 3.4 A threshold
  • Physical footprint: 50 × 147 × 129 mm, 0.45 kg, mounts on DIN 35 rail, requires 40 mm top and bottom clearance
  • MTBF at 40°C: 1,611,993 hours; efficiency 87%; power loss 11 W at rated load
  • Certifications: CE, UL 508, CSA C22.2 No. 142 (cULus File E143289), ATEX II 3G Ex nA nC IIC T4 Gc, CB certificate
  • External circuit breaker mandatory: 10 A characteristic B or 6 A characteristic C on AC input side
  • Correct for S7-1500 systems only; not compatible with S7-1200, S7-300, or S7-400 rail mounting
  • For loads exceeding 3 A: specify 6EP1332-4BA10 (6 A) or 6EP1332-5BA00 (10 A)