Product Specifications
Brand: Siemens
Part Number: 4AM2642-5AV00-0EA0
Type: Isolation Transformer
Series: SITAS
Rated Power: 40 VA
Primary Voltage: 400 V AC (taps: 380/400/420 V)
Secondary Voltage: 42 V AC
Secondary Current: 0.95 A
Product Description
The Siemens 4AM2642-5AV00-0EA0 is a 40 VA SITAS isolation transformer providing a 42 V AC output from a 400 V AC supply, designed for control circuits requiring voltages above the SELV threshold yet still demanding safe galvanic separation from the mains.
Electrical Design
- 400 V primary with three taps (380/400/420 V) for ±5% supply compensation
- Fixed 42 V AC secondary rated at 0.95 A continuous current
- 76% efficiency with 17.5% relative short-circuit voltage
- II0 vector group — full galvanic isolation, no shielding winding
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Power | 40 VA |
| Primary Voltage | 400 V AC ±5% (380/400/420 V taps) |
| Secondary Voltage | 42 V AC |
| Secondary Current | 0.95 A |
| Efficiency | 76% |
| Short-Circuit Voltage | 17.5% |
| Core Type | EI 66/22 |
| Thermal Class | B (IEC 60085) |
| Protection Class | IP00 |
| Dimensions (W×H×D) | 68 × 75 × 80 mm |
| Weight | 0.94 kg |
| Standards | EN 61558-2-1, EN 61558-2-4 |
| Certifications | CE, UKCA, cRUus, EAC |
Application and Mounting
Screw-mounted inside control cabinets for fixed installations. The 42 V secondary is commonly used in industrial control circuits where higher voltage levels are needed for relays, contactors, and solenoid valves. IP00 rating requires enclosure integration.
Related Products
- Siemens 4AM4042-8DD40-0FA0 — 250 VA Multi-Tap SITAS Transformer, 11 Primary Voltages, Dual 115 V Output
- Siemens 4AM6542-5FT10-0FA0 — Adapts 500 V class mains down to 230 V for control circuits
Resources & Documentation
4AM2642-5AV00-0EA0 40VA Transformer 400V/42V, Siemens
Product Specifications
Brand: Siemens
Part Number: 4AM2642-5AV00-0EA0
Type: Isolation Transformer
Series: SITAS
Rated Power: 40 VA
Primary Voltage: 400 V AC (taps: 380/400/420 V)
Secondary Voltage: 42 V AC
Secondary Current: 0.95 A