Siemens 3RV2011-1EA10 — MPCB Selection and Buying Guide

By Abdullah Zahid
11 min read
Siemens 3RV2011-1EA10 S00 frame motor protection circuit breaker for three-phase industrial motor applications

Siemens 3RV2011-1EA10 Motor Protection Circuit Breaker: Complete Specifications and Selection Guide

Controls engineers specifying motor protection for small three-phase drives — pumps, compressors, conveyors — frequently land on the Siemens 3RV2011-1EA10 after narrowing the field to Class 10 thermal-magnetic MPCBs in the 2.8–4 A range. The question at this stage is not what the device is, but whether it is exactly the right variant: correct frame size, correct FLA window, correct terminal type, and the right set of built-in protection functions for the application. This article answers those questions directly, using verified specifications from Siemens documentation, and flags the ordering mistakes that generate unnecessary returns and commissioning delays.

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

Does the 3RV2011-1EA10 Fit Your Motor Protection Requirements?

This device is right for engineers and panel builders who need a compact, self-contained motor protection solution for motors with a full-load amperage that falls squarely in the 2.8–4 A range. Confirm all of the following before ordering:

  • Motor full-load amperage (FLA) is between 2.8 A and 4 A — this is a hard electrical constraint, not a nominal guideline
  • Motor supply voltage is 20–690 V AC at 50 or 60 Hz — DC applications are not supported
  • Panel wiring practice uses screw terminals — push-in or tool-less spring-clamp termination is not available on this model
  • A 35 mm DIN rail (EN 60715 standard) is available in the enclosure — no alternative mounting method is supported
  • No auxiliary contact switching or undervoltage release is required on the base device — if either is needed, this model cannot be retrofitted and a different variant must be selected

If your motor FLA exceeds 4 A, or if you need auxiliary NO/NC contacts for interlock or signaling circuits, move to the 3RV2021 or 3RV2031 series before ordering.

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What the 3RV2011-1EA10 Actually Does in a Motor Control Circuit

The Siemens 3RV2011-1EA10 is a thermal-magnetic motor protection circuit breaker — an MPCB — rated for motors drawing 2.8 to 4 A at supply voltages from 20 to 690 V AC. It is a single device that combines three protection functions in a compact S00 frame: thermal overload protection with a rotary dial adjustable across the 2.8–4 A window, magnetic short-circuit protection via an N-release set at 52 A, and automatic phase failure detection that trips the device the moment one supply phase is lost. The Class 10 trip characteristic means the device tolerates motor inrush during start without nuisance tripping while still providing reliable overload protection during sustained overcurrent conditions.

In most small motor applications — pump stations, compressor branches, conveyor drives — the 3RV2011-1EA10 eliminates the need for a separate overload relay and external disconnect switch. The rotary handle on the face of the device provides manual ON/OFF switching and doubles as the manual reset mechanism after a trip. Total power dissipation at typical operating conditions is 6.3 W, with 7.25 W per pole in the hot operating state, which means the device generates minimal heat in a crowded panel and rarely requires supplemental ventilation or derating at ambient temperatures up to 60°C.

Typical System Architecture for SIRIUS MPCB Installations

The 3RV2011-1EA10 sits at the motor branch level of the distribution system, immediately downstream of the branch fuse or main disconnect and directly upstream of the motor terminals. Its position in the signal and power chain is straightforward:

  • Main supply bus or distribution panel feeds three-phase L1, L2, L3 to the motor branch circuit
  • Branch fusing or upstream disconnect (sized per local electrical code) protects the supply conductors to the MPCB inlet
  • 3RV2011-1EA10 mounts on 35 mm DIN rail; inlet terminals receive L1, L2, L3 from the branch supply
  • Outlet terminals T1, T2, T3 connect directly to motor power terminals U, V, W via three-conductor cable rated for motor FLA
  • No neutral or ground connection passes through the MPCB; grounding is handled per panel wiring practice at the motor frame and panel earth bar

Industries and Applications Where This MPCB Is the Right Fit

The 3RV2011-1EA10 is most commonly specified in water and wastewater pump stations, where three-phase motors in the fractional to 1.5 kW range drive circulation and transfer pumps. The built-in phase failure detection is especially valuable here — a lost phase that goes undetected can burn out a pump motor within minutes, and external phase-loss relays add cost and panel space the 3RV2011-1EA10 makes unnecessary.

In compressed air generation and HVAC applications, the Class 10 trip characteristic prevents nuisance trips during the higher-than-rated inrush currents that accompany compressor and fan motor starts. The S00 frame's 96 mm depth and compact footprint make it straightforward to integrate into standard panel cutouts without redesigning the enclosure layout.

OEM panel builders assembling multi-motor control enclosures consistently return to this model for its low 6.3 W power loss per unit. In a panel with six or eight motor branches, the difference in total thermal load between a low-loss MPCB and a higher-dissipation alternative is meaningful for enclosure sizing and cooling calculations.

Retrofit projects replacing aging motor starters on existing 35 mm DIN rails benefit from direct mechanical compatibility — no rail modification, no new hardware, no re-termination of existing conduit entry points beyond the motor branch conductors themselves.

Application Typical Deployment
Industrial pump station (water/wastewater) Overload and phase-loss protection for three-phase transfer or circulation pump motors at 400 V or 690 V
Compressed air generation Class 10 MPCB on compressor motor branch; tolerates start inrush without nuisance trips in standard panel cutout
Conveyor and material handling Phase failure detection prevents single-phase operation that causes motor burnout and line stoppage
OEM multi-motor control panel Low 6.3 W power loss simplifies thermal management in high-density enclosures with multiple motor branches
Retrofit of aging motor starter circuits Direct 35 mm DIN rail mount eliminates re-installation costs; replaces separate overload relay and disconnect
HVAC fan motor protection S00 compact frame fits existing enclosures; 2.8–4 A range covers fractional hp fan motor FLA at 460–480 V

Key Specifications Engineers Need to Make a Purchase Decision

Specification Value
Supply Voltage (AC) 20–690 V, 50–60 Hz
Thermal Overload Adjustment (A-release) 2.8–4 A (rotary dial)
Short-Circuit Release (N-release) 52 A
Trip Class CLASS 10 per IEC 60947-4-1
Maximum Short-Circuit Breaking Capacity (Icu) 52 kA
Operating Power at 400 V (AC-3) 1.5 kW
Frame Size S00 (compact)
Dimensions (Depth x Height) 96 mm x 97 mm
Mounting 35 mm DIN rail, EN 60715
Protection Class IP20 (finger-safe front)

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

3RV2011-1EA10 vs. Other SIRIUS Variants: Which Frame Do You Actually Need?

Feature 3RV2011-1EA10 3RV2021 (larger frame) 3RV2031 (largest frame)
Frame Size S00 S0 S2/S3
FLA Adjustment Range 2.8–4 A Up to 6.3 A (and above) Higher amperage ranges
Short-Circuit Breaking Capacity (Icu) 52 kA Higher ratings available Up to 100 kA
Auxiliary Contact Option Not available on base model Available via modules Available via modules
Undervoltage Release Not integrated Available as option Available as option
Trip Indicator No Available on select models Available on select models
Phase Failure Detection Yes, integral Yes, integral Yes, integral
Connection Type Screw terminal Screw terminal Screw terminal

If your motor FLA sits at or below 4 A and your application requires no remote signaling or undervoltage release, the 3RV2011-1EA10 is the correct and most cost-efficient choice — check current availability at LeadTime.ca.

Expert Verdict: Honest Assessment and Procurement Reality

The Siemens 3RV2011-1EA10 does exactly what it is specified to do, reliably and without complication, for motors in the 2.8–4 A FLA range. The combination of Class 10 thermal overload, 52 A magnetic N-release, and integral phase failure detection in an S00 frame with 6.3 W typical power loss is a genuinely practical package for small motor branch protection. The screw terminal design is conventional and field-proven. There is nothing exotic about this device, and that is precisely its value in production environments where maintenance technicians need to reset and restore motor circuits without specialist tools or configuration procedures.

The honest limitations are equally clear. This base model has no auxiliary contacts, no undervoltage release, and no built-in trip indicator. If your control circuit needs a pilot contact to signal the PLC when the MPCB trips, this model cannot provide it without adding an external relay. If your safety specification requires undervoltage release for emergency stop functionality, you must move to a different variant — there is no field retrofit path on the S00 frame for these features. The 52 kA short-circuit breaking capacity covers the overwhelming majority of industrial panel installations, but if your facility's available fault current exceeds that figure, the 3RV2031 with its 100 kA rating is the correct selection. These are not shortcomings — they are deliberate design trade-offs that keep the device compact and cost-effective for straightforward applications.

From a procurement standpoint, the 3RV2011-1EA10 is a widely stocked, stable-supply part with no known obsolescence risk. Standard lead time runs from in-stock same-day to two weeks depending on distributor inventory levels. Volume pricing for OEM panel builders ordering ten or more units is routinely available. 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 Overview

The following points cover the key requirements for installing the 3RV2011-1EA10. For full wiring diagrams and step-by-step procedures, refer to the Siemens SIRIUS motor protection documentation supplied with the device.

  • Mount on a standard 35 mm DIN rail (EN 60715); verify full seating with no gaps before applying supply voltage — the device supports any mounting orientation
  • Connect three-phase supply L1, L2, L3 to the inlet terminals; outlet terminals T1, T2, T3 connect to motor terminals U, V, W — no neutral connection is made through the MPCB
  • Screw terminals require tool-based termination; verify conductor sizing is appropriate for 4 A at the rated supply voltage before final termination
  • Set the rotary dial to the motor nameplate FLA value within the 2.8–4 A adjustment range before energizing the circuit
  • Verify all terminal screws are fully torqued; re-check terminal tightness after the first 24 hours of operation as conductors settle under thermal cycling

Wrong-Part Prevention Checklist Before You Order

Before placing an order for the Siemens 3RV2011-1EA10, verify every item below against your motor nameplate and panel design documents. These are the eight checks that prevent mis-orders and commissioning failures:

  1. Confirm motor full-load amperage (FLA) falls between 2.8 A and 4 A; model is NOT suitable for motors rated above 4 A or below 2.8 A.
  2. Verify motor supply voltage is 20–690 V AC (single or three-phase 50/60 Hz); DC applications are not supported.
  3. Check that screw terminals are compatible with control panel wiring gauge and your termination practice (tool-less push-in NOT available on this model).
  4. Ensure 35 mm DIN rail (EN 60715 standard) is available; this model cannot mount on top-hat rail or in terminal blocks.
  5. Confirm phase failure protection is required or acceptable; if single-phase motor, phase failure detection is not applicable.
  6. Verify no auxiliary contact switching is needed; if yes, this base model cannot be retrofitted — select a different model variant.
  7. Confirm power loss and thermal dissipation are acceptable (6.3 W typical, 7.25 W per pole in hot state); in high-ambient environments above 60°C, derating may be required.
  8. Check short-circuit current capacity of installation (52 kA Icu breaking capacity is standard; if higher, select larger frame).

If any item on this checklist does not confirm, contact the LeadTime.ca team to identify the correct SIRIUS variant for your application before ordering.

Frequently Asked Questions

Can the 3RV2011-1EA10 be used with a single-phase motor?

The device can physically connect to single-phase supply and provide thermal overload and magnetic short-circuit protection. However, the integral phase failure detection function is only meaningful in three-phase applications — on a single-phase motor there is no third phase to lose, so that protection function provides no benefit. For single-phase motor applications, verify that the motor FLA still falls within the 2.8–4 A adjustment range.

Is there any way to add auxiliary contacts to the 3RV2011-1EA10 after installation?

No. The base 3RV2011-1EA10 in S00 frame has no provision for auxiliary contact modules as a field retrofit. If your design requires NO or NC contacts for pilot circuit signaling or PLC input, you must specify a model variant that supports auxiliary switching from the outset. Attempting to add signaling capability after installation requires replacing the device entirely.

What is the correct thermal overload setting for a motor with a 3.8 A nameplate FLA?

Set the rotary dial to 3.8 A within the 2.8–4 A adjustment range. The dial is calibrated to the motor FLA, not the trip current — the Class 10 characteristic automatically handles the time-delay behavior during inrush. Setting the dial above the motor nameplate FLA will allow sustained overcurrent that can damage motor windings without triggering a timely trip.

What happens if the installation ambient temperature exceeds 60°C?

The 3RV2011-1EA10 is rated for ambient operating temperatures from −20°C to +60°C. Above 60°C, thermal derating may be required, meaning the effective trip threshold of the thermal overload element shifts. In high-ambient installations — such as outdoor enclosures in summer or panels located near heat sources — ensure adequate ventilation or select a device derated for the actual ambient. The 6.3 W typical power loss and 7.25 W per pole hot-state figure are the starting point for enclosure thermal calculations.

How do I confirm the device has tripped versus being manually switched off?

The 3RV2011-1EA10 base model has no built-in trip indicator lamp or signal contact. The handle position is the only visual diagnostic: the handle in the fully up position indicates ON, fully down indicates manual OFF, and a center or intermediate position typically indicates a trip condition. Always verify supply voltage at the inlet terminals with a meter before concluding the handle position alone confirms device status.

What is the mechanical and electrical service life of this device?

Both mechanical and electrical service life are rated at 100,000 operating cycles. At one switching cycle per day, that represents approximately 25–30 years of service under normal conditions. Frequent short-circuit trips accelerate electrical wear; in applications where nuisance trips or repeated fault conditions occur, device condition should be assessed at earlier intervals.

Why Order From LeadTime.ca

  • Ships worldwide — not limited to any single region or country
  • Stocks hard-to-find and standard SIRIUS motor protection parts with competitive lead times
  • Volume pricing available for OEM panel builders and procurement teams ordering in quantity
  • Direct contact with a knowledgeable team for pre-order compatibility confirmation and variant selection support
  • Fast response on quote requests — no waiting through multi-tier distribution chains

At-a-Glance Summary

  • Model: Siemens 3RV2011-1EA10 — Motor Protection Circuit Breaker, S00 frame, CLASS 10
  • Thermal overload adjustment: 2.8–4 A via rotary dial; motor FLA must fall within this range
  • Magnetic short-circuit release: N-release at 52 A; maximum Icu breaking capacity 52 kA
  • Supply voltage: 20–690 V AC, 50/60 Hz; rated operating power 1.5 kW at 400 V AC-3
  • Integral phase failure detection: yes — no external relay required
  • Auxiliary contacts and undervoltage release: not available on base model — requires different variant
  • Mounting: 35 mm DIN rail (EN 60715); dimensions 96 mm depth x 97 mm height
  • Connection: screw terminals only — push-in termination not available
  • Protection class: IP20 (finger-safe front panel)
  • Power dissipation: 6.3 W typical total; 7.25 W per pole at hot operating state
  • Ambient operating range: −20°C to +60°C; storage −50°C to +80°C
  • Complies with IEC 60947-4-1, IEC 60947-1; CE marked; UL/CSA rated
  • Service life: 100,000 mechanical and electrical operating cycles