Siemens SITAS 4AP2042 630VA 3-Phase Control Transformer, 400V to 289/230V

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Product Specifications

Brand: Siemens
Part Number: 4AP2042-8BC40-0HA0
Type: Three-Phase Control Transformer
Series: SITAS 4AP
Rated Power: 630 VA (S6: 1.8 kVA)
Primary Voltage: 400 V (Y500-400 / Δ289-230)
Secondary Voltage: Y 400 V / Δ 230 V
Secondary Current: 0.9-1.57 A
Frequency: 50/60 Hz
Efficiency: 89%
Thermal Class: B (40 °C)
Protection Degree: IP00
Mounting: Screw Mount
Certifications: CE, cRUus, EN 61558-2

Product Description

The Siemens SITAS 4AP2042-8BC40-0HA0 is a 630 VA three-phase control transformer engineered for industrial control circuit applications. It steps down 400 V three-phase primary supply to 289/230 V secondary output, powering contactors, relays, solenoids, and control electronics in automation panels and motor control centers.

Key Features

Low inrush current design enables fuseless protection when paired with SIRIUS 3RV motor starter protectors, reducing component count and panel wiring
Multi-voltage primary tapping: Y500-400 / Δ289-230 for flexible installation across different supply configurations
50/60 Hz operation covers both European and global industrial power standards
IP00 open-type construction for enclosed panel or cabinet mounting
Screw/tab terminals for secure, maintenance-free connections

Technical Data

Parameter	Value
Rated Power (PN)	630 VA
Short-Term Power (S6)	1.8 kVA
Primary Voltage	Y500-400 / Δ289-230 V
Secondary Voltage	Y 400 V / Δ 230 V
Secondary Current	0.9-1.57 A
Frequency	50/60 Hz
Efficiency	89%
Thermal Class	B (40 °C ambient)
Protection Degree	IP00
Dimensions (W x D x H)	219 x 168 x 168 mm
Weight	7.4 kg
Standards	EN 61558-2-1, -2-2, -2-4
Certifications	CE, cRUus

Applications

This transformer is suitable for supplying control circuits in industrial machinery, conveyor systems, packaging equipment, and motor control centers where reliable galvanic isolation between the mains and control voltage is required. The low inrush characteristic makes it particularly well-suited for applications using SIRIUS 3RV circuit breakers for primary-side protection.