Siemens ep1961-2ba41

By Abdullah Zahid
13 min read
Siemens 6EP1961-2BA41 SITOP PSE200U selectivity module 4-channel 10A DIN rail mount for 24V DC control panels

Siemens 6EP1961-2BA41 SITOP PSE200U/4X3-10A/SEO Selectivity Module: Specs, Price and Selection Guide for 24 V DC Control Systems

Controls engineers selecting a power distribution strategy for multi-load 24 V DC panels face a specific, high-stakes decision: how to protect individual circuits without sacrificing visibility or adding significant panel footprint. The Siemens 6EP1961-2BA41 — the SITOP PSE200U/4X3-10A/SEO Selectivity Module — addresses this directly with four independent 10 A output channels, adjustable current thresholds from 3 to 10 A via front-panel potentiometer, and a three-color LED status display per channel, all within a 72 × 180 × 72 mm DIN rail housing. If a single-supply panel feeds solenoids, safety devices, or I/O modules and circuit isolation is the priority, this is the part that eliminates cascading trip failures at the distribution level.

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 6EP1961-2BA41 — and Who Should Not

This module is the right choice for engineers distributing 24 V DC power from a single SITOP PSE200U supply to multiple independent load circuits where a fault on one circuit must not affect others. Buy this part when all of the following apply:

  • Each load circuit draws up to 10 A continuous and your supply is rated for a minimum 40 A total input current
  • You need per-channel current threshold adjustment between 3 and 10 A without external relays or fuse holders
  • Your panel uses EN 60715 DIN rail (35 × 7.5 mm or 35 × 15 mm) with at least 72 mm width and 50 mm clearance top and bottom available
  • Real-time status feedback — green, yellow, red LED per channel — is required without adding separate monitoring hardware
  • Your application is in a non-hazardous location and galvanic isolation between input and output is not required (Class III protection only)

If your loads do not exceed 5 A per channel, the 6EP1961-2BA31 is the lower-cost correct choice. If your application is in an ATEX-rated hazardous location, the 6EP1961-2BA41 carries no hazardous-location certification and must not be used — verify your certification requirement before ordering.

On this page:

What the Siemens 6EP1961-2BA41 Actually Does in a 24 V DC Panel

The 6EP1961-2BA41 is a DC selectivity module in the SITOP PSE200U series. Its functional role is straightforward: it accepts a single 24 V DC input from a SITOP PSE200U supply rated for up to 40 A and divides that supply into four electrically independent output circuits, each protected individually at up to 10 A. When one output channel trips — due to a short-circuit, overloaded solenoid coil, or motor locked-rotor condition — only that channel shuts down. The remaining three channels continue supplying their loads uninterrupted.

What separates the 6EP1961-2BA41 from a passive fused terminal block is the combination of three active features. First, each channel carries an adjustable current threshold (3 to 10 A) set via a front-panel potentiometer, letting the engineer calibrate the trip point to the actual load rather than accepting a fixed fuse value. Second, a three-color LED per channel displays real-time circuit status — green for active and healthy, yellow for manually switched off, red for overcurrent detected — eliminating the need to open the panel or use a multimeter for basic fault identification. Third, a status signal output in pulse/pause format lets SIMATIC PLC function blocks monitor channel states and trigger remote resets, making the module a participant in the control logic rather than a passive protection device. Overcurrent response is typical 100 ms; if input voltage drops below 20 V, the module switches off within 0.5 ms to protect downstream devices.

Efficiency at rated load is 99%, with a MTBF of 540,979 hours at 40°C — approximately 61.7 years of calculated service life under standard industrial conditions. These are not theoretical figures; they reflect why the SITOP PSE200U selectivity series is a standard panel component in factories running continuous production with zero-fault-tolerance requirements.

Where the 6EP1961-2BA41 Sits in a Typical Control System

The 6EP1961-2BA41 sits between the 24 V DC supply and the load devices, acting as a fault-isolating distribution point that keeps the upstream supply and downstream circuits from influencing each other during fault conditions.

  • 24 V DC source — SITOP PSE200U power supply rated for minimum 40 A feeds the module input via screw terminals accepting 0.5–10 mm² copper
  • 6EP1961-2BA41 — receives full supply current at the input, distributes it across four independently protected 10 A output channels on the DIN rail
  • Output channels 1–4 — each feeds a separate load circuit (solenoid valve, motor starter, safety scanner, I/O module) via 0.5–4 mm² screw terminals
  • Status signal output — pulse/pause signal wired to SIMATIC PLC input for remote monitoring and reset logic without manual panel access
  • LED indicators on module front face — provide technician-level visual triage at the panel without instrumentation

Industries and Machines Where This Module Solves Real Problems

In packaging machinery and bottling lines, where a single 24 V bus feeds pneumatic valve banks, proximity sensors, and servo drive enable signals simultaneously, the 6EP1961-2BA41 prevents a failed valve coil from pulling down the entire bus and halting the line. Each of the four output channels can be assigned to a functional group — valve cluster, sensor rail, drive enable, HMI supply — with individual trip thresholds calibrated to match the actual load profile of each group.

In automotive assembly cell controls, DC motor starter circuits for small conveyor drives, positioning actuators, and clamping cylinders can each occupy one channel. A locked-rotor condition on a clamping cylinder will trip that channel's red LED and isolate the fault while the conveyor and positioning axes continue operating, allowing maintenance to address the specific fault without stopping the entire cell.

For safety interlock and sensor supply distribution — e-stops, safety light curtains, magnetic door locks, photoelectric sensors — the per-channel isolation and status output allow a safety PLC to detect which circuit has dropped and respond with circuit-level logic rather than a full system stop. In legacy panel retrofits where DIN rail space is constrained, the 72 mm × 180 mm footprint replaces four separate fuse holders, a monitoring relay, and associated wiring in a single snap-on module.

In water treatment and HVAC control panels, where the consequence of an undetected circuit fault may not be visible until a process parameter drifts, the tri-color LED display and SIMATIC-compatible status output provide a passive, always-on monitoring layer at the power distribution level.

Application Typical Deployment
Solenoid valve protection Four hydraulic or pneumatic valve circuits on one 24 V supply; failed coil isolated per channel without stopping remaining valves
Multi-motor DC starter distribution Four small DC motors powered independently; locked-rotor fault on one motor isolated, others unaffected
Safety interlock and sensor supply E-stops, safety scanners, and photoelectric sensors on separate channels; per-channel fault status reported to safety PLC
PLC I/O module power distribution Four remote terminal units or I/O modules powered from one SITOP supply; wiring shorts isolated at channel level
Legacy panel retrofit Replaces four fuse holders and a monitoring relay in constrained 72 mm DIN rail slot; adds adjustable threshold and LED status
Pharmaceutical and process control 24 V bus segmented across instrument loops; individual loop faults flagged via status output to DCS or SCADA

Key Specifications: What Engineers Need to Know Before Ordering

Parameter Value
Input Voltage 24 V DC (acceptable range 19.2–28.8 V, ±20%)
Input Current at Rated Load 40 A maximum
Output Channels 4, independent
Output Current Rating per Channel 10 A continuous
Adjustable Current Threshold 3–10 A via front potentiometer
Overcurrent Response Time Typical 100 ms; 0.5 ms when Vin drops below 20 V
Internal Fuse per Output 15 A (non-accessible, not field-replaceable)
Dimensions (W × H × D) 72 mm × 180 mm × 72 mm
Operating Temperature 0 to +60°C
Certifications CE, UL-Recognized (UL 2367), cULus-Listed (UL 508), CB certificate, EAC; no ATEX approval

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

6EP1961-2BA41 vs. 6EP1961-2BA31 and Related Variants: Which One Do You Need?

Model Channels Current per Channel Threshold Range DIN Rail (EN 60715) LED Status per Channel ATEX Approved
6EP1961-2BA11 4 5 A Verify with datasheet Yes Yes No
6EP1961-2BA31 4 5 A Lower than 2BA41 Yes Yes No
6EP1961-2BA41 4 10 A 3–10 A Yes (35 × 7.5 or 35 × 15 mm) Green / Yellow / Red No
6EP1961-2BA61 4 Higher current (verify) Verify with datasheet Yes Yes Verify

The practical selection rule is simple: if every load in your panel stays below 5 A, the 6EP1961-2BA31 is the cost-appropriate choice. If any single load peaks above 5 A or you need the 3–10 A field-adjustable threshold range, the 6EP1961-2BA41 is the correct variant. Do not mix model suffixes in the same panel without individually verifying each model's current rating — the 72 mm form factor is identical across variants, but the electrical specifications are not. If your architecture uses 10 A per channel with adjustable SITOP selectivity, the 6EP1961-2BA41 is the correct choice — check current availability at LeadTime.ca.

Expert Verdict: Honest Assessment for Controls Engineers

The 6EP1961-2BA41 does one thing exceptionally well: it converts a single-point-of-failure power distribution topology into a fault-tolerant one without adding PLCs, relays, or monitoring relays to the BOM. The combination of adjustable 3–10 A threshold, 100 ms overcurrent response, and tri-color LED status feedback at the panel makes this module genuinely useful on the bench and on the floor — a technician can diagnose a channel fault in under 10 seconds by reading the front panel. The MTBF of 540,979 hours at 40°C and the 99% efficiency at rated load mean this is not a component you will be replacing or managing thermally in a standard enclosed control panel.

The honest limitations are worth naming clearly. The 6EP1961-2BA41 provides no galvanic isolation between input and output — Class III protection only. If your application requires isolated output circuits, a different power distribution architecture is required. The internal 15 A fuse per output is not field-replaceable, which means a fuse event requires module replacement or service, not a two-minute fuse swap. The module carries no ATEX hazardous-location certification; this is a hard constraint, not a design preference. And parallel hot-standby or bridging configurations are not supported — this module is for radial load distribution, not redundancy switching. If you need galvanic isolation, ATEX certification, or per-channel current above 10 A, confirm the 6EP1961-2BA61 specifications or evaluate a different architecture before ordering.

From a procurement standpoint, the 6EP1961-2BA41 is a standard stocking item through authorized distributors with typical lead times of one to two weeks for in-stock units. Volume pricing is available at quantity breaks. If you are commissioning multiple panels simultaneously, bundling selectivity modules with the SITOP PSE200U supply in a single order typically improves lead time coordination. 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 Verify Before You Energize

  • Confirm the upstream SITOP PSE200U supply is rated for the full 40 A input current draw before connecting the module; undersized supplies will cause voltage sag below the 20 V threshold and trigger the 0.5 ms shutdown on all channels
  • Input terminals accept 0.5–10 mm² copper wire (two terminals each for +24 V and 0 V); output channel terminals accept 0.5–4 mm² copper wire; do not exceed these ranges or mix gauges at the same terminal block
  • Mount the module on EN 60715 DIN rail (35 × 7.5 mm or 35 × 15 mm) with a minimum 50 mm clearance above and below for thermal convection — no forced cooling is required at rated load under natural convection within the 0–60°C ambient range
  • Set each channel's current threshold via the front-panel potentiometer before energizing the load: rotate fully clockwise to 10 A, then back counterclockwise to the desired trip point within the 3–10 A range; label the final setting on the module front for maintenance reference
  • Verify status signal output wiring is compatible with the connected PLC's pulse/pause input format and that any SIMATIC function blocks assigned to remote reset are correctly configured before live commissioning

Wrong-Part Prevention: Eight Checks Before You Order

Before placing a purchase order for the Siemens 6EP1961-2BA41, work through each of the following items. These are the most common sources of wrong-part orders and field incompatibilities for this model:

  1. Confirm input voltage is 24 V DC and supply rated for minimum 40 A (module draws full input current at rated load)
  2. Verify each load circuit does NOT exceed 10 A continuous; oversized loads will trigger overcurrent cutoff (typical 100 ms response)
  3. Check available DIN rail space: module requires 72 mm width and 50 mm clearance top/bottom minimum; measure panel beforehand
  4. Do NOT assume galvanic isolation between input and output: module provides Class III protection only; for isolated circuits, design power distribution differently
  5. Confirm no ATEX/explosion-proof requirement: this model carries NO hazardous-location certification; do not substitute for XEx applications
  6. Verify potentiometer accessibility: if current threshold must be field-adjusted frequently, ensure DIN rail location allows access to module front panel
  7. Check that status signal outputs (pulse/pause format) are compatible with existing PLC function blocks (e.g., SIMATIC) before purchase
  8. Confirm terminal screw sizes: input 0.5-10 mm² (both +24V and 0V), outputs 0.5-4 mm² each; do NOT mix wire gauges

If any item on this checklist raises a question about fit, contact the LeadTime.ca team before ordering — we can verify compatibility and confirm the correct variant for your application.

Frequently Asked Questions

Can the 6EP1961-2BA41 be used without a SITOP PSE200U power supply, or does it require a Siemens supply specifically?

The 6EP1961-2BA41 requires a 24 V DC input in the range of 19.2–28.8 V and a supply capable of delivering up to 40 A. It is designed for use with the SITOP PSE200U series, and native SIMATIC integration for the status signal output is optimized for that pairing. Using a non-Siemens 24 V DC supply that meets the voltage and current specifications may power the module, but SIMATIC function block compatibility for the pulse/pause status signal should be independently verified.

What does each LED color actually indicate, and can all LEDs going dark point to a supply fault rather than the module itself?

Green indicates the output channel is active and within the set current threshold. Yellow indicates the channel has been manually switched off via the push-button — it is not a fault condition. Red indicates the channel has detected overcurrent and switched off; manual reset is required after the load fault is cleared. If all four LEDs go dark simultaneously, the most likely cause is input voltage below 20 V — verify the upstream supply voltage at the module input terminals before suspecting the module itself.

Is the internal 15 A fuse per output channel field-replaceable, and what is the procedure when it trips?

The 15 A internal fuse per output channel is non-accessible and not field-replaceable by the end user. If an internal fuse trips — typically indicated by all LEDs dark on a specific channel despite correct input voltage — the module requires return to Siemens service or replacement. This is a critical distinction from fuse holder-based distribution where a technician can swap a fuse in two minutes.

How does the adjustable threshold potentiometer interact with the overcurrent response time — does a lower threshold setting mean faster trip?

The potentiometer sets the current level at which the overcurrent response is triggered, not the speed of the response. The typical overcurrent response time of 100 ms applies across the full 3–10 A adjustment range. The 0.5 ms immediate shutdown is a separate event triggered when the output current exceeds the set value AND the input voltage simultaneously drops below 20 V — these are two distinct protection mechanisms operating in parallel.

Does the 6EP1961-2BA41 support remote reset from a PLC, or does an operator need to physically press the button after a trip?

The module provides a status signal output in pulse/pause format that is evaluable via SIMATIC function blocks for remote monitoring. Remote reset capability through this signal interface should be verified against the specific SIMATIC function block configuration in your system — confirm PLC compatibility and function block assignment before assuming remote reset is available in your architecture without physical panel access.

What is the practical lead time and pricing range for the 6EP1961-2BA41 when ordering through LeadTime.ca?

The 6EP1961-2BA41 is stocked through authorized distributors with typical lead times of one to two weeks for in-stock units. Factory lead times when units are unavailable from stock typically extend to four to six weeks. Pricing varies by volume and order configuration — contact LeadTime.ca directly for a current quote and availability confirmation before committing to a build schedule.

Why Order the Siemens 6EP1961-2BA41 from LeadTime.ca

  • LeadTime.ca ships the 6EP1961-2BA41 and the full SITOP PSE200U selectivity module family worldwide — no geographic restrictions on quoting or fulfillment
  • Volume pricing is available for quantity orders; contact the team directly for project-level pricing on multiple units or panel-build quantities
  • Hard-to-source or long-lead Siemens automation components are a core focus — if standard channels show extended lead times, LeadTime.ca can advise on sourcing options
  • Technical pre-sales questions about variant selection, compatibility, or order configuration are answered directly before purchase

At-a-Glance Summary

  • Model: Siemens 6EP1961-2BA41 — SITOP PSE200U/4X3-10A/SEO Selectivity Module
  • Four independent output channels, each rated 10 A continuous with adjustable trip threshold 3–10 A via front potentiometer
  • Input: 24 V DC, 19.2–28.8 V acceptable range, 40 A maximum input current required from upstream SITOP PSE200U supply
  • Overcurrent response: typical 100 ms; immediate 0.5 ms shutdown when input voltage drops below 20 V
  • Internal 15 A fuse per output channel — non-accessible, not field-replaceable
  • Three-color LED (green/yellow/red) per channel provides real-time status without external monitoring hardware
  • Status signal output in pulse/pause format — compatible with SIMATIC function blocks for remote monitoring and reset
  • DIN rail mount: EN 60715 (35 × 7.5 mm or 35 × 15 mm); 72 mm width, 50 mm clearance top and bottom required
  • Operating temperature: 0 to +60°C; MTBF 540,979 hours at 40°C; efficiency 99% at rated load
  • Certifications: CE, UL-Recognized (UL 2367), cULus-Listed (UL 508), CB certificate, EAC — no ATEX approval
  • Class III protection only — no galvanic isolation between input and output
  • Not suitable for ATEX/hazardous locations, loads exceeding 10 A per channel, or hot-standby parallel configurations