3RT2026 (size S0, 25 A)
Siemens (SIRIUS) · SIRIUS S0
25 A AC-3 / 11 kW @ 400 V in the same S0 frame — covers 7.5 HP @ 230 V and 15 HP @ 460 V three-phase compressors.
Ratings
- AC-3 @ 400 V
- 25 A (11 kW)
- AC-1 (resistive)
- 40 A
- Hp (3Φ)
- ≈ 7.5 HP @ 230 V · 15 HP @ 460 V
- Three-phase HP
- ≈ 7.5 HP @ 230 V · 15 HP @ 460 V
Coil data
- Available coil voltages
- 24, 110, 120, 230, 240, 400 VAC via MLFB coil codes
- Inrush VA
- ≈ 60–70 VA
- Sealed (holding) VA
- ≈ 8–9 VA
- Pickup voltage
- 0.8–1.1 × Us
- Dropout voltage
- 0.1–0.5 × Us
Typical measured coil resistance (±15%, ballpark)
120 VAC≈ 130–230 Ω
230 VAC≈ 500–900 Ω
OL = open coil · near zero = shorted turns · coil-to-frame must read >1 MΩ.
Coil resistance checker
Pick the coil voltage, enter your meter reading across A1–A2 (coil disconnected), and compare it to the expected ballpark.
Ω
This model (120 VAC table value)130 Ω–230 Ω
Generic mid-frame 110–120 VAC60 Ω–180 Ω
Readings 2× high usually mean heat damage and a coil near end of life. Ballpark only (±15%+); electronic wide-range coils (e.g. ABB AF) read misleading values — test those at rated voltage instead. Always measure coil-to-frame too: must be >1 MΩ.
Terminals & accessories
Power/coil terminals: 1/3/5 in, 2/4/6 out; A1/A2
Auxiliary contacts: 1 NO + 1 NC integrated on many SKUs; 3RH29 blocks
Companion overload: 3RU2126 thermal relay (dial the motor FLA)
Cross-references
- Schneider LC1D25
- ABB A26 / AF26
- Allen-Bradley 100-C23
- Eaton XTCE025C
Field notes
- S0 frame tops out at 38 A — above that you jump to S2 (3RT203…) which is a different footprint.