Siemens SITAS 4AU3032 6300VA 3-Phase Control Transformer, 500V to 480/460V

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Product Specifications

Brand: Siemens

Part Number: 4AU3032-8CC40-0HA0

Type: Three-Phase Control Transformer

Series: SITAS 4AU

Rated Power: 6300 VA (S6: 28 kVA)

Primary Voltage: 500 V (9-tap Y: 360-520 V / Δ: 208-300 V)

Secondary Voltage: Y 400 V / Δ 230 V (480/460 V tap)

Secondary Current: 9.1 A (Y) / 15.83 A (Δ)

Frequency: 50/60 Hz

Efficiency: 96%

Insulation Class: H (55 °C)

Protection Degree: IP00

Mounting: Screw Mount

Certifications: CE, cRUus, EN 61558-2

Product Description

The Siemens SITAS 4AU3032-8CC40-0HA0 is a 6300 VA (6.3 kVA) three-phase control transformer with a 9-tap primary covering 360 V to 520 V in star and 208 V to 300 V in delta configuration. The secondary delivers Y 400 V / Δ 230 V with 480/460 V tap points, making it highly adaptable across different mains voltages. With 96% efficiency and 28 kVA short-term capacity, it reliably powers 3-phase control circuits in demanding industrial automation applications.

Key Features

9-tap primary (Y: 360-520 V / Δ: 208-300 V) adapts to a wide range of global 3-phase mains voltages
96% efficiency — among the highest in its class — reduces heat generation and operating cost
H-class insulation (55 °C ambient) supports operation in higher-temperature panel environments
Low inrush current design enables fuseless protection when paired with SIRIUS 3RV motor starter protectors
50/60 Hz dual-frequency operation for global industrial power compatibility
IP00 open-type construction for enclosed panel or cabinet mounting

Technical Data

Parameter	Value
Rated Power (PN)	6300 VA (6.3 kVA)
Short-Term Power (S6)	28 kVA
Primary Voltage	Y: 520/500/480/460/440/420/400/380/360 V
Primary Voltage (Δ)	Δ: 300/289/277/266/254/240/230/220/208 V
Secondary Voltage	Y 400 V / Δ 230 V
Secondary Current	9.1 A (Y400) / 15.83 A (Δ230)
Frequency	50/60 Hz
Efficiency	96%
Insulation Class	H (55 °C ambient)
Protection Degree	IP00
Dimensions (W x D x H)	310 x 258 x 270 mm
Weight	55 kg
Standards	EN 61558-2-1, -2-2, -2-4
Certifications	CE, cRUus

Applications

This transformer is designed for supplying 3-phase control circuits in industrial machinery, motor control centers, and automation systems operating on diverse mains voltages from 360 V to 520 V. The 9-tap primary makes it especially suited for export-oriented machine builders and multi-standard production facilities. The 96% efficiency and H-class insulation ensure reliable long-term operation with minimal thermal stress, while the low inrush characteristic enables streamlined fuseless panel design with SIRIUS 3RV circuit breakers.