Siemens 6EP1333-3BA10 — SITOP PSU200M 5A Selection Guide

By Abdullah Zahid
12 min read
Siemens 6EP1333-3BA10 SITOP PSU200M 5A 24VDC stabilized DIN rail power supply for industrial control panels

Siemens 6EP1333-3BA10 SITOP PSU200M 5 A Stabilized Power Supply: Specifications, Selection Guide & Where to Buy

Engineers sourcing a compact 24 VDC modular power supply for a new control panel build — or tracking down a confirmed replacement for the obsolete 6EP1333-3BA00 — arrive at the Siemens 6EP1333-3BA10 as the current-generation answer. This is the SITOP PSU200M 5 A stabilized power supply: a DIN rail-mounted unit accepting 120/230-500 V AC input, delivering a stable 24 V DC output at 5 A continuous, with an adjustable output up to 28.8 V DC and full support for signaling, buffer, and redundancy add-on modules. The modular architecture is what separates it from fixed-output alternatives — you can expand capability without replacing the base unit.

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

Who Should Buy the Siemens 6EP1333-3BA10 — and Who Shouldn't

The Siemens 6EP1333-3BA10 is the right choice for automation engineers and panel builders who need a modular, DIN rail-mounted 24 VDC supply with room to grow. Buy this SKU if all of the following are true for your application:

  • Your 24 VDC load current is 5 A or less — this model is rated for exactly 5 A continuous output, no more.
  • Your input mains voltage is 120 V AC, 230 V AC, or 380–500 V AC (single-phase L1-N or 3-phase using any two hot wires).
  • Your cabinet uses standard 35 mm DIN rail mounting.
  • You need or anticipate needing signaling, redundancy, or buffer module expansion without replacing the base unit.
  • You are replacing an obsolete 6EP1333-3BA00 and require an identical footprint and wiring configuration.

If your load current exceeds 5 A, do not force this SKU — the 6EP1333-3BA20 (10 A), 6EP1333-3BA30 (20 A), or 6EP1333-3BA40 (40 A) are the correct alternatives within the same SITOP Modular product family, all using the same input voltage range and modular platform.

On this page:

What the Siemens 6EP1333-3BA10 Actually Does in a Control System

The Siemens 6EP1333-3BA10 is the primary 24 VDC power source for control circuits, sensors, solenoids, and small automation devices inside an industrial cabinet. Its job is deceptively simple — convert wide-range AC mains input into a stable 24 V DC rail — but the SITOP PSU200M 5 A does it within a modular framework that most fixed-output supplies cannot match. The output voltage is adjustable up to 28.8 V DC, giving commissioning engineers the ability to fine-tune rail voltage to match sensor thresholds or compensate for long cable runs. The unit supports parallel connection with additional 6EP1333-3BA10 units, allowing load capacity to scale without a cabinet redesign. Three onboard LED indicators give real-time status at a glance. Critically, there is no integrated circuit breaker — external overload protection is mandatory, and that protection device must handle the full 5 A load current.

What earns this model repeat specification over generic fixed-output alternatives is the add-on module ecosystem. A signaling module adds remote ON/OFF control and floating signal contacts for output status monitoring. A buffer module maintains 24 VDC output during brief AC supply interruptions — up to 800 milliseconds at 5 A, or up to 3 seconds at reduced load. A redundancy module enables automatic failover when two supplies are installed in parallel. None of these capabilities require replacing the base unit; they mount alongside it on the same platform.

Typical System Architecture for the SITOP PSU200M 5 A

The 6EP1333-3BA10 sits between the AC mains distribution and the 24 VDC control rail, converting and stabilizing voltage for all downstream control devices. Here is where it falls in a typical panel architecture:

  • AC mains input (120, 230, or 380–500 V AC) feeds through a panel-mounted external protection device rated for the 5 A load current.
  • The 6EP1333-3BA10 receives AC input at its L1/N terminals (single-phase) or any two hot wire terminals (3-phase) and outputs 24 V DC on its positive and negative output terminals.
  • Optional add-on modules — signaling, buffer, or redundancy — mount adjacent on the same DIN rail and connect directly to the base unit without additional wiring harnesses.
  • The 24 VDC output rail distributes power to downstream devices: PLC 24 VDC I/O cards, proximity sensors, solenoid valves, indicator lamps, and relay coils.
  • In parallel configurations, two or more 6EP1333-3BA10 units share the common 24 VDC bus, with combined output current equal to 5 A multiplied by the number of units.

Industries and Applications Where This Supply Gets Specified

In discrete manufacturing and automotive assembly environments, the 6EP1333-3BA10 powers proximity sensors, limit switches, and pneumatic solenoids on conveyor lines and press control panels. The modular redundancy option is frequently specified on critical lines where an unplanned power supply failure would halt production. The adjustable output voltage also accommodates varying sensor threshold requirements without additional hardware.

Machine tool control panels are a natural fit for this supply. The 5 A output handles typical sensor and solenoid loads in CNC and press applications, and the compact DIN rail form factor fits tightly packaged control enclosures. In food and beverage packaging, the buffer module option is specified where brief AC interruptions from large motor starts would otherwise reset control logic — the buffer module maintains 24 VDC output through those transient interruptions.

Building automation and HVAC control applications use the 6EP1333-3BA10 to power zone damper actuators, terminal unit controllers, and system sensors. The wide input voltage range (120 to 500 V AC) makes it useful in international installations or facilities with non-standard mains voltages. Material handling, pharmaceutical manufacturing, and assembly line automation are also common deployment environments.

Application Typical Deployment
Automotive assembly conveyor Powers proximity sensors, solenoids, and PLC I/O; redundancy module added for uptime requirements
Machine tool control panel Primary 24 VDC supply for CNC I/O, sensor circuits, and axis enable relays
Food and beverage packaging line Buffer module prevents control logic reset during motor start transients
Building automation / HVAC Powers damper actuators and zone controllers; wide AC input range suits mixed-voltage facilities
Pharmaceutical manufacturing Stable 24 VDC rail for validation-critical instrumentation; modular expansion without base unit replacement
Obsolete 6EP1333-3BA00 replacement Drop-in upgrade with identical footprint and wiring; no cabinet modification required

Key Specifications: What You Need to Make a Purchase Decision

Parameter Specification
Input Voltage 120/230–500 V AC (single-phase L1-N or 3-phase using any two hot wires)
Output Voltage 24 V DC nominal, adjustable up to 28.8 V DC
Output Current 5 A continuous
Parallel Load Sharing Supported — multiple units can connect in parallel
Short-Circuit Protection Mode Selectable: automatic restart or storing shutdown
Integrated Circuit Breaker None — external overload protection required
Mounting 35 mm DIN rail
Operating Temperature 0°C to 60°C
Radio Interference Suppression Class B
Input Harmonic Compliance EN 61000-3-2

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

6EP1333-3BA10 vs Other SITOP Modular Amperage Options

Model Output Current Input Voltage Range Typical Application Relative Price Tier
6EP1333-3BA10 5 A 120/230–500 V AC Small control circuits, sensors, solenoids Base
6EP1333-3BA20 10 A 120/230–500 V AC Medium machine panels, larger I/O systems +15–20%
6EP1333-3BA30 20 A 120/230–500 V AC Large control and PLC circuit power rails +30–40%
6EP1333-3BA40 40 A 120/230–500 V AC High-capacity and redundant system configurations +60–80%

All four models share the same SITOP Modular platform and the same wide AC input voltage range — selection is driven entirely by load current requirement. If your calculated 24 VDC load is 5 A or under, the 6EP1333-3BA10 is the correct choice. Check current availability at LeadTime.ca — we carry the full SITOP Modular amperage range and ship worldwide.

Expert Verdict: Honest Assessment Before You Order

The Siemens 6EP1333-3BA10 earns its repeat specification in industrial panels for two concrete reasons: the wide-range AC input that handles 120, 230, and 380–500 V AC without a tap change, and the add-on module architecture that lets you bolt on a signaling, buffer, or redundancy module without touching the base unit wiring. For a 5 A control rail in a machine panel, packaging line, or building automation cabinet, this is a well-proven choice that integrates cleanly with SIMATIC PLC I/O and SIRIUS control components. The adjustable output up to 28.8 V DC is a genuine commissioning convenience, not a marketing feature — engineers retrofitting legacy sensor circuits with higher threshold requirements use it regularly.

Where this unit is not the right answer: if your load calculation comes out above 5 A, even at 5.5 A, specify the 6EP1333-3BA20 instead. Do not overload this SKU and expect parallel operation to compensate without the proper parallel connection setup and matched output voltage setpoints. Also note — there is no integrated circuit breaker. If your design assumes a self-protecting supply, add an external protection device rated for 5 A before the input terminals. That is not a deficiency unique to this model; it is standard for the SITOP Modular platform and gives the panel builder more flexibility in protection device selection, but it must not be overlooked during BOM assembly.

From a procurement standpoint, the 6EP1333-3BA10 is an active product as of February 2026 with standard industrial lead times through authorized distributors worldwide. It is the confirmed current-generation replacement for the obsolete 6EP1333-3BA00, with identical mechanical footprint and wiring — making it a zero-modification drop-in for retrofit projects. Add-on modules are priced and sourced separately, so plan your BOM to include them explicitly. If this matches your system requirements, view current stock and pricing at LeadTime.ca.

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

Wiring and Installation: What to Know Before You Mount It

  • Mount the unit on a clean, undamaged 35 mm DIN rail before making any electrical connections; verify the unit does not shift or rock after snapping into position.
  • An external overload protection device rated for the full 5 A output current is mandatory — connect it to the AC input terminals before energizing; there is no internal circuit breaker.
  • For single-phase input, connect L1 and N; for 3-phase input, use any two hot wires — do not use neutral in 3-phase mode.
  • Route AC input cables (120/230–500 V) separately from the 24 VDC output cables to minimize electromagnetic interference on sensor and signal wiring.
  • After mounting and wiring, set the adjustable output voltage potentiometer to the required setpoint — typically 24.0 V DC nominal — and verify with a multimeter under load before connecting control devices.

Compatible Add-On Modules for the SITOP PSU200M Platform

The SITOP Modular platform supports three categories of add-on modules that mount adjacent to the 6EP1333-3BA10 on the same DIN rail. These modules are purchased separately and must be confirmed against the SITOP Modular compatibility list:

  • Signaling Module — Provides floating signal contacts for "output voltage OK" and "ready for operation" status, plus a remote ON/OFF control input via signal terminal. Mounts on the left side of the base unit. Used when remote monitoring or supervisory control is required.
  • Buffer Module — Maintains 24 VDC output during brief AC supply interruptions. Buffer duration is load-dependent: up to 800 milliseconds at 5 A load, and up to 3 seconds at reduced load levels. Specified in applications where motor start transients or brief mains interruptions would otherwise reset control logic.
  • Redundancy Module — Enables automatic failover in a dual power supply configuration. The module monitors threshold voltage and switches to the standby supply instantly on primary failure. When two supplies are used in parallel above 20 A total current, one redundancy module per supply is required.

Wrong-Part Prevention Checklist

Before finalizing your order for the Siemens 6EP1333-3BA10, run through each of the following checks — these are the most common sourcing errors for this SKU:

  1. Confirm model is 6EP1333-3BA10, not 6EP1333-3BA00 (obsolete predecessor).
  2. Verify output is 5A, not 10A, 20A, or 40A.
  3. Check input voltage range is 120/230-500 V AC, not 24 V DC input.
  4. Confirm DIN rail mounting is compatible with your cabinet (standard 35 mm rail).
  5. Verify no integrated circuit breaker is present; external protection must be added.
  6. Check that add-on modules (if required) use the same SITOP Modular platform.
  7. Ensure replacement for 6EP1333-3BA00 is confirmed if upgrading from obsolete unit.

If any item on this checklist raises a question about fit, contact the LeadTime.ca team before ordering — our application specialists can confirm compatibility against your system design.

Frequently Asked Questions

Is the Siemens 6EP1333-3BA10 a direct replacement for the 6EP1333-3BA00?

Yes. The 6EP1333-3BA10 is the current-generation replacement for the obsolete 6EP1333-3BA00. The footprint and wiring configuration are identical, so existing cabinet mounting and wiring harnesses do not require modification. Always verify the model number on the unit being replaced — old documentation may still reference the obsolete part number.

Can the 6EP1333-3BA10 be operated in parallel with another identical unit?

Yes. Two or more 6EP1333-3BA10 units can be connected in parallel by joining their positive output terminals and negative output terminals respectively. Combined output current equals 5 A multiplied by the number of units. For balanced load sharing, both units must be adjusted to the same output voltage setpoint within 0.2 V of each other — unequal setpoints cause unequal current distribution.

What external protection device is required, and why isn't one built in?

The 6EP1333-3BA10 does not include an integrated circuit breaker. An external overload protection device rated for the full 5 A load current must be wired between the AC mains and the unit's input terminals. This is by design across the SITOP Modular platform — it gives the panel builder flexibility to select the appropriate protection device type and rating for the specific installation. The unit does offer selectable short-circuit protection modes (automatic restart or storing shutdown) for the DC output side.

What does each LED indicator show on the 6EP1333-3BA10?

The unit has three LED indicators that show device operating status and fault conditions. The combination of lit and unlit LEDs indicates power-on status, output voltage OK status, and fault or overload conditions. The specific indicator matrix is documented in the Siemens product manual available through SiePortal — refer to that document for commissioning and troubleshooting use.

How long does the buffer module maintain 24 VDC output during a mains interruption?

Buffer duration depends on load current at the time of interruption. At the full 5 A output of the 6EP1333-3BA10, the buffer module maintains 24 VDC for up to 800 milliseconds. At reduced loads, buffer duration extends up to 3 seconds. For reference, a buffer module paired with a higher-current SITOP Modular supply (40 A) provides approximately 100 milliseconds at full load. The buffer module is a separately ordered add-on and mounts on the same DIN rail as the base unit.

Does the 6EP1333-3BA10 work with 120 V AC single-phase input, or is it 230 V only?

The 6EP1333-3BA10 accepts 120 V AC single-phase input (L1 and N) as well as 230 V AC single-phase and 380–500 V AC 3-phase (any two hot wires). No tap changes or re-wiring are required between voltage ranges — the input is designed for wide-range operation across all three mains voltage levels. This makes it suitable for North American 120 V panels, European 230 V installations, and 3-phase industrial distributions worldwide.

Why Order from LeadTime.ca

  • LeadTime.ca ships the Siemens 6EP1333-3BA10 and the full SITOP Modular add-on module range worldwide — no regional restrictions on sourcing.
  • Active product status confirmed as of February 2026; stock levels and current lead time are visible on the product page.
  • Volume pricing available for multi-unit orders and panel builder accounts — contact the team directly for project-based pricing.
  • Application specialists available to confirm correct model selection, add-on module compatibility, and replacement verification for obsolete units including the 6EP1333-3BA00.
  • Hard-to-find industrial automation parts sourced on request — if the standard variant is on back-order, we source across the supply chain.

At-a-Glance Summary

  • Model: Siemens 6EP1333-3BA10 — SITOP PSU200M 5 A stabilized power supply, active product as of February 2026.
  • Output: 24 V DC at 5 A continuous; adjustable up to 28.8 V DC via onboard potentiometer.
  • Input: 120/230–500 V AC, single-phase (L1-N) or 3-phase (any two hot wires) — no tap change required.
  • Mounting: Standard 35 mm DIN rail; compact modular form factor suitable for space-constrained cabinets.
  • Operating temperature: 0°C to 60°C; storage temperature: -25°C to 70°C.
  • No integrated circuit breaker — external 5 A protection device is required at the AC input.
  • Parallel load sharing supported — combined output scales at 5 A per unit; setpoints must be matched within 0.2 V.
  • Three add-on module types available on the same SITOP Modular platform: signaling, buffer (up to 800 msec at 5 A), and redundancy.
  • Radio interference suppression: Class B; EN 61000-3-2 input harmonic compliance.
  • Confirmed direct replacement for obsolete 6EP1333-3BA00 — identical footprint, same wiring, no cabinet modification required.
  • EAN: 4025515152873.