3WL1110-3EB37-5FA4-ZR10 Siemens 3WL withdrawable air circuit breaker

Clean-room evidence identifies 3WL1110-3EB37-5FA4-ZR10 as Siemens 3WL withdrawable air circuit breaker. The exact reference is listed as a Siemens 3WL withdrawable three-pole circuit breaker, size I, rated 1000 A to 690 V, with 66 kA Icu at 500 V and rear vertical connections.

Documented identity and function

Rebuilt from individual evidence

System position

The exact reference is listed as a Siemens 3WL withdrawable three-pole circuit breaker, size I, rated 1000 A to 690 V, with 66 kA Icu at 500 V and rear vertical connections.

The exact listing specifies an ETU45 LSIN overcurrent release, adjustable 0.4-1 In protection, and motor or hand operation with 110-127 V AC or 110-125 V DC motor supply.

The system path is inferred as the low-voltage busbar or upstream source, then 3WL1110-3EB37-5FA4-ZR10, then the protected outgoing feeder.

Unknown: installation compatibility, configuration, and unit condition are not established by the captured sources.

Exact reference: 3WL1110-3EB37-5FA4-ZR10
Category: PLC / CPU
Evidence checked: 2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function: The 3WL air circuit breaker protects and switches a high-current incoming or feeder circuit.
System position: It intervenes between the low-voltage busbar or upstream source and the protected outgoing feeder in the documented system path.
Upstream / inputs: Inputs or upstream: the low-voltage busbar or upstream source.
Downstream / outputs: Outputs or downstream: the protected outgoing feeder.
Limitations: Unknown: installation compatibility, configuration, and unit condition are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The exact reference is listed as a Siemens 3WL withdrawable three-pole circuit breaker, size I, rated 1000 A to 690 V, with 66 kA Icu at 500 V and rear vertical connections.
Confidence: medium
- plc-trade.com — retrieved 2026-09-11; medium confidence
The exact listing specifies an ETU45 LSIN overcurrent release, adjustable 0.4-1 In protection, and motor or hand operation with 110-127 V AC or 110-125 V DC motor supply.
Confidence: medium
- plc-trade.com — retrieved 2026-09-11; medium confidence

Inferences

Inferred system position: 3WL1110-3EB37-5FA4-ZR10 intervenes between the low-voltage busbar or upstream source and the protected outgoing feeder.
Confidence: medium
Rationale: The exact-reference sources identify the component function and its connected interfaces; the intervening system position is an inference from those facts.
- plc-trade.com — retrieved 2026-09-11; medium confidence

Unknowns

Unknown: installation compatibility, configuration, and unit condition are not established by the captured sources.
Confidence: low
Missing evidence: No captured source provides the receiving system configuration, firmware, wiring, or unit condition.

System position diagram

Diagram showing 3WL1110-3EB37-5FA4-ZR10 between the low-voltage busbar or upstream source and the protected outgoing feeder. — System path inferred from the documented function of 3WL1110-3EB37-5FA4-ZR10.

View Mermaid source

flowchart LR
  U["Upstream"] --> P["3WL1110-3EB37-5FA4-ZR10"]
  P --> D["Downstream"]

View diagram labels

Nodes: Upstream: the low-voltage busbar or upstream source; Device: 3WL1110-3EB37-5FA4-ZR10; Downstream: the protected outgoing feeder
Edges: The upstream path feeds 3WL1110-3EB37-5FA4-ZR10.; 3WL1110-3EB37-5FA4-ZR10 feeds the downstream path.

Next action

Publishable as a clean-room evidence record for 3WL1110-3EB37-5FA4-ZR10; verify the installation against current documentation.

Confirm voltage, wiring, accessories, and service condition against the installation before substitution.

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