4AM3242-5CT10-0FA0 Siemens SITAS control transformer

Clean-room evidence identifies 4AM3242-5CT10-0FA0 as Siemens SITAS control transformer. KY Automation identifies the exact reference as a Siemens SITAS 4AM control transformer rated 63 VA continuous and 190 VA S6, with a 440 V plus or minus 5 percent primary and 230 V, 0.27 A secondary.

Documented identity and function

Rebuilt from individual evidence

System position

KY Automation identifies the exact reference as a Siemens SITAS 4AM control transformer rated 63 VA continuous and 190 VA S6, with a 440 V plus or minus 5 percent primary and 230 V, 0.27 A secondary.

The same listing specifies 85 percent efficiency, EN 61558-related standards, CE and UL/CSA marks, and dimensions of 86 x 98 x 90 mm.

The system path is inferred as the 440 V primary distribution, then 4AM3242-5CT10-0FA0, then the 230 V control circuit.

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

Exact reference: 4AM3242-5CT10-0FA0
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 SITAS control transformer converts a 440 V control supply to an isolated 230 V single-phase control supply.
System position: It intervenes between the 440 V primary distribution and the 230 V control circuit in the documented system path.
Upstream / inputs: Inputs or upstream: the 440 V primary distribution.
Downstream / outputs: Outputs or downstream: the 230 V control circuit.
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

KY Automation identifies the exact reference as a Siemens SITAS 4AM control transformer rated 63 VA continuous and 190 VA S6, with a 440 V plus or minus 5 percent primary and 230 V, 0.27 A secondary.
Confidence: high
- www.kyautomation.com — retrieved 2026-09-11; high confidence
The same listing specifies 85 percent efficiency, EN 61558-related standards, CE and UL/CSA marks, and dimensions of 86 x 98 x 90 mm.
Confidence: high
- www.kyautomation.com — retrieved 2026-09-11; high confidence

Inferences

Inferred system position: 4AM3242-5CT10-0FA0 intervenes between the 440 V primary distribution and the 230 V control circuit.
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.
- www.kyautomation.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 4AM3242-5CT10-0FA0 between the 440 V primary distribution and the 230 V control circuit. — System path inferred from the documented function of 4AM3242-5CT10-0FA0.

View Mermaid source

flowchart LR
  U["Upstream"] --> P["4AM3242-5CT10-0FA0"]
  P --> D["Downstream"]

View diagram labels

Nodes: Upstream: the 440 V primary distribution; Device: 4AM3242-5CT10-0FA0; Downstream: the 230 V control circuit
Edges: The upstream path feeds 4AM3242-5CT10-0FA0.; 4AM3242-5CT10-0FA0 feeds the downstream path.

Next action

Publishable as a clean-room evidence record for 4AM3242-5CT10-0FA0; verify the installation against current documentation.

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

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