3WL1350-4FB36-5FR4 Siemens SENTRON 3WL air circuit breaker

Clean-room evidence identifies 3WL1350-4FB36-5FR4 as Siemens SENTRON 3WL air circuit breaker. The Siemens data sheet identifies the exact reference as a three-pole withdrawable 3WL air circuit breaker, size III, rated 5000 A to 690 V with 100 kA Icu at 500 V.

Documented identity and function

Rebuilt from individual evidence

System position

The Siemens data sheet identifies the exact reference as a three-pole withdrawable 3WL air circuit breaker, size III, rated 5000 A to 690 V with 100 kA Icu at 500 V.

The same data sheet lists ETU45 LSIN protection, a four-line display, rear horizontal busbar connection, drawer mounting, and 100 kA Icu at 415 and 500 V plus 85 kA at 690 V.

The system path is inferred as the low-voltage busbar or upstream source, then 3WL1350-4FB36-5FR4, then the protected outgoing feeder.

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

Exact reference: 3WL1350-4FB36-5FR4
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 SENTRON air circuit breaker protects and switches a high-current plant or motor feeder.
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 Siemens data sheet identifies the exact reference as a three-pole withdrawable 3WL air circuit breaker, size III, rated 5000 A to 690 V with 100 kA Icu at 500 V.
Confidence: high
- cdn.plc-trade.com — retrieved 2026-09-11; high confidence
The same data sheet lists ETU45 LSIN protection, a four-line display, rear horizontal busbar connection, drawer mounting, and 100 kA Icu at 415 and 500 V plus 85 kA at 690 V.
Confidence: high
- cdn.plc-trade.com — retrieved 2026-09-11; high confidence

Inferences

Inferred system position: 3WL1350-4FB36-5FR4 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.
- cdn.plc-trade.com — retrieved 2026-09-11; high 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 3WL1350-4FB36-5FR4 between the low-voltage busbar or upstream source and the protected outgoing feeder. — System path inferred from the documented function of 3WL1350-4FB36-5FR4.

View Mermaid source

flowchart LR
  U["Upstream"] --> P["3WL1350-4FB36-5FR4"]
  P --> D["Downstream"]

View diagram labels

Nodes: Upstream: the low-voltage busbar or upstream source; Device: 3WL1350-4FB36-5FR4; Downstream: the protected outgoing feeder
Edges: The upstream path feeds 3WL1350-4FB36-5FR4.; 3WL1350-4FB36-5FR4 feeds the downstream path.

Next action

Publishable as a clean-room evidence record for 3WL1350-4FB36-5FR4; verify the installation against current documentation.

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

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