Siemens 4AM6142-8DD40 525/500/480V to 230V 1600VA Control Transformer

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Product Specifications

Brand: Siemens

Part Number: 4AM6142-8DD40-0FA0

Product Type: Control Transformer

Series: SITAS 4AM6142

Rated Power: 1,600 VA

Primary Voltage: 525/500/480 V (3-tap)

Secondary Voltage: 230 V

Secondary Current: 6.96 A

Short-Time Power (S6): 7,300 VA

Frequency: 50/60 Hz

Mounting: Screw Mount

Product Description

The SITAS 4AM6142-8DD40-0FA0 is a 1600VA single-phase control transformer with a three-tap primary spanning 525/500/480V, stepping down to 230V at 6.96A. The 8DD40 variant covers the 480-525V range common in North American and heavy-industrial power distribution.

Electrical Performance

Rated at 1,600VA continuous with a short-time power rating of 7,300VA (S6 duty) — over 4.5x headroom. The laminated EI core achieves approximately 96 percent efficiency. Three primary taps accommodate regional voltage variations from 480V to 525V. Full galvanic isolation via II0 vector group.

Mechanical Design

Substantial 164x176x138mm IP00 open-frame construction for enclosure installation with screw terminals and screw mounting. Class B (130 C) insulation system, rated for 40 C ambient. Weighs approximately 28 kg.

Application

Suits industrial control panels in facilities with 480-525V distribution, including North American manufacturing plants, processing facilities, and heavy-industrial sites where 230V control power is required from higher-voltage mains.

Decision Parameters

Parameter	Value
Rated Power	1,600 VA
Primary Voltage	525 / 500 / 480 V (3 taps)
Secondary Voltage	230 V
Secondary Current	6.96 A
Short-Time Power (S6)	7,300 VA
Efficiency	~96%
Insulation Class	B (130 C)
Protection Class	IP00
Dimensions (WxHxD)	164 x 176 x 138 mm
Mounting	Screw Mount