Siemens 4AM4642-5AN00 400V to 24V 400VA Single-Phase Control Transformer

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Product Specifications

Brand: Siemens
Part Number: 4AM4642-5AN00-0EA0
Product Type: Control Transformer
Series: SITAS 4AM4642
Rated Power: 400 VA
Primary Voltage: 400 V (taps: 380/400/420 V)
Secondary Voltage: 24 V
Secondary Current: 16.7 A
Short-Time Power (S6): 1,440 VA
Frequency: 50/60 Hz
Mounting: Screw Mount

Product Description

The SITAS 4AM4642-5AN00-0EA0 is a 400VA single-phase control transformer converting 400V mains to 24V at 16.7A. Designed for control panels fed from European 400V three-phase networks, the three-tap primary (380/400/420V) compensates for site voltage variation.

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 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 per IEC 60085. Weighs approximately 5.5 kg.

Application

Common in European automation panels where 24V control circuits are powered from a phase of the 400V three-phase supply. The 16.7A secondary supports extensive 24V control networks with multiple contactors, relays, PLCs, and HMI panels.

Decision Parameters

Parameter	Value
Rated Power	400 VA
Primary Voltage	400 V (taps: 380/400/420 V)
Secondary Voltage	24 V
Secondary Current	16.7 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