• Siemens SIRIUS 3UL23 Residual-Current Transformers (35-210 mm)
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Siemens SIRIUS 3UL23 Residual-Current Transformers (35-210 mm)

Siemens SIRIUS 3UL23 Residual-Current Transformers (35-210 mm)

SIRIUS 3UL23 residual-current transformers (type A) for residual current and ground fault monitoring with 3UG5625, 3UG5825 and SIMOCODE.

Key features

  • Detects pure AC residual currents and AC with pulsating DC component (type A)
  • Feed-through openings from 35 to 210 mm
  • Measurable current 0.03-40 A
  • Essential accessory for 3UG5625, 3UG5825 and SIMOCODE 3UF75/3UF76/3UF80
  • 35 and 55 mm versions DIN-rail mountable with 3UL2900 adapter

Specifications

Brand Siemens
Product line SIRIUS 3UL23
Measurable current 0.03 ... 40 A
Transformer type Type A (IEC TR 60755)
Connection Screw terminals
Source Siemens Catalog IC 10 · 2026, p. 991
3UL2302-1A Item: Residual-current transformer | Opening: 35 mm | Terminal: 2.5 mm2
3UL2303-1A Item: Residual-current transformer | Opening: 55 mm | Terminal: 2.5 mm2
3UL2304-1A Item: Residual-current transformer | Opening: 80 mm | Terminal: 2.5 mm2
3UL2305-1A Item: Residual-current transformer | Opening: 105 mm | Terminal: 2.5 mm2
3UL2306-1A Item: Residual-current transformer | Opening: 140 mm | Terminal: 2.5 mm2
3UL2307-1A Item: Residual-current transformer | Opening: 210 mm | Terminal: 4 mm2
3UL2900 Item: DIN-rail adapter for 3UL23 up to 55 mm | Opening: - | Terminal: -
AccessoriesSiemens
7 product codes available in this family
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Siemens SIRIUS 3UL23 Residual-Current Transformers (35-210 mm)

Brand Siemens·Accessories

Available part numbers (7)

3UL2302-1A, 3UL2303-1A, 3UL2304-1A, 3UL2305-1A, 3UL2306-1A, 3UL2307-1A, 3UL2900

How to order

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Product codes & specifications
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Product codeSpec
3UL2302-1AItem: Residual-current transformer | Opening: 35 mm | Terminal: 2.5 mm2
3UL2303-1AItem: Residual-current transformer | Opening: 55 mm | Terminal: 2.5 mm2
3UL2304-1AItem: Residual-current transformer | Opening: 80 mm | Terminal: 2.5 mm2
3UL2305-1AItem: Residual-current transformer | Opening: 105 mm | Terminal: 2.5 mm2
3UL2306-1AItem: Residual-current transformer | Opening: 140 mm | Terminal: 2.5 mm2
3UL2307-1AItem: Residual-current transformer | Opening: 210 mm | Terminal: 4 mm2
3UL2900Item: DIN-rail adapter for 3UL23 up to 55 mm | Opening: - | Terminal: -

Need a different model, or a part not listed here? Send us your parts list →

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