Siemens 4AM4642-5AJ10 400V to 110V 400VA Single-Phase Control Transformer

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Product Specifications

Brand: Siemens
Part Number: 4AM4642-5AJ10-0FA0
Product Type: Control Transformer
Series: SITAS 4AM4642
Rated Power: 400 VA
Primary Voltage: 400 V (taps: 380/400/420 V)
Secondary Voltage: 110 V
Secondary Current: 3.64 A
Short-Time Power (S6): 1,440 VA
Frequency: 50/60 Hz
Mounting: Screw Mount

Product Description

The SITAS 4AM4642-5AJ10-0FA0 is a 400VA single-phase control transformer converting 400V mains to 110V at 3.64A. The three-tap primary (380/400/420V, plus or minus 5 percent) adapts to varying grid conditions common in industrial facilities.

Electrical Performance

Rated at 400VA continuous with a short-time power rating of 1,440VA (S6 duty). The EI 120/52 core achieves approximately 91 percent efficiency. Full galvanic isolation between primary and secondary via II0 vector group. 50/60Hz operation.

Mechanical Design

Compact 122x121x114mm IP00 open-frame design with screw terminals and screw mounting. Class B (130 C) insulation system. Weighs approximately 5.5 kg.

Application

Designed for control panels on European 400V three-phase networks, where one phase supplies the control transformer for 110V control circuits. Common in machine tool, material handling, and process automation applications.

Decision Parameters

Parameter	Value
Rated Power	400 VA
Primary Voltage	400 V (taps: 380/400/420 V)
Secondary Voltage	110 V
Secondary Current	3.64 A
Short-Time Power (S6)	1,440 VA
Efficiency	~91 percent
Insulation Class	B (130 C)
Protection Class	IP00
Dimensions (WxHxD)	122 x 121 x 114 mm
Mounting	Screw Mount