Product Specifications
- Brand
- Siemens
- Part Number
- 4AM5742-8JD40-0FA0
- Product Type
- Control Transformer
- Series
- SITAS 4AM5742
- Rated Power
- 1,000 VA
- Primary Voltage
- 415/400/385/245/230/215 V (6-tap)
- Secondary Voltage
- 2 x 115 V (series 230 V / parallel 115 V)
- Secondary Current
- 4.35 A (230 V) / 8.70 A (115 V)
- Short-Time Power (S6)
- 5,000 VA
- Frequency
- 50/60 Hz
- Mounting
- Screw Mount
Product Description
The SITAS 4AM5742-8JD40-0FA0 is the screw-terminal variant of the 8JD40 configuration — the most versatile primary tap arrangement in the 4AM5742 series, with six taps spanning 415V down to 215V. Dual 115V secondaries can be series-connected for 230V at 4.35A or parallel-connected for 115V at 8.70A.
Electrical Performance
Rated at 1,000VA continuous with a short-time power rating of 5,000VA (S6 duty). The EI 150/90 laminated core achieves approximately 93 percent efficiency. Six primary taps handle a wide range of international grid voltages — from 215V to 415V — without requiring separate transformer stock. III0 vector group with shielded isolation.
Mechanical Design
Compact 152x144x132mm IP00 open-frame construction for enclosure installation. Screw terminals on a screw-mount chassis — the standard configuration for conventional panel wiring. Class B (130 C) insulation system, rated for 40 C ambient. Weighs approximately 16 kg.
Application
Ideal for international machine builders and panel shops stocking one transformer that covers installations from 215V to 415V. The dual secondary supports both 230V (European/Asian) and 115V (North American) control circuit standards from a single transformer model.
Decision Parameters
| Parameter | Value |
|---|---|
| Rated Power | 1,000 VA |
| Primary Voltage | 415 / 400 / 385 / 245 / 230 / 215 V (6 taps) |
| Secondary Voltage | 2 x 115 V (series: 230 V / parallel: 115 V) |
| Secondary Current | 4.35 A (230 V) / 8.70 A (115 V) |
| Short-Time Power (S6) | 5,000 VA |
| Efficiency | ~93% |
| Insulation Class | B (130 C) |
| Protection Class | IP00 |
| Dimensions (WxHxD) | 152 x 144 x 132 mm |
| Mounting | Screw Mount |
Related Products
- Siemens 4AM5742-5AV00-0EA0 — 42V at 23.8A for safety extra-low voltage control circuits
- Siemens 4AM5742-8JD40-0FA1 — Dual 115V secondaries for 230V series or 115V parallel at 8.70A
- Siemens 4AM5742-5LT10-0FA0 — 230V at 4.35A from 660V for mining and heavy-industrial grids
Resources & Documentation
Siemens 4AM5742-8JD40 Six-Tap 415-215V Primary to 230V 1000VA Control Transformer
Product Specifications
- Brand
- Siemens
- Part Number
- 4AM5742-8JD40-0FA0
- Product Type
- Control Transformer
- Series
- SITAS 4AM5742
- Rated Power
- 1,000 VA
- Primary Voltage
- 415/400/385/245/230/215 V (6-tap)
- Secondary Voltage
- 2 x 115 V (series 230 V / parallel 115 V)
- Secondary Current
- 4.35 A (230 V) / 8.70 A (115 V)
- Short-Time Power (S6)
- 5,000 VA
- Frequency
- 50/60 Hz
- Mounting
- Screw Mount








