100-C23 (23 A)
Allen-Bradley (Rockwell) · Bulletin 100-C, 100-C23/C30/C37 frame
23 A Bulletin 100-C — the mid IEC frame in Rockwell panels, common on 10–15 HP compressor and pump starters paired with a 193-E electronic overload.
Ratings
- AC-3 (400 V)
- 23 A / 11 kW
- AC-1
- 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, 200/208, 230/240, 380/400, 460/480, 575/600 VAC; DC and electronic options
- Inrush VA
- ≈ 120 VA
- Sealed (holding) VA
- ≈ 10 VA
- Pickup voltage
- 0.85–1.1 × rated
- Dropout voltage
- 0.3–0.6 × rated
Typical measured coil resistance (±15%, ballpark)
24 VAC≈ 5–11 Ω
120 VAC≈ 120–250 Ω
240 VAC≈ 500–950 Ω
480 VAC≈ 2,000–3,900 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 (24 VAC table value)5 Ω–11 Ω
Generic mid-frame 24 VAC4 Ω–9 Ω
OL = open coil. 0–2 Ω = shorted turns (often from a cooked transformer). 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: Screw clamp to 16 mm² / 6 AWG
Auxiliary contacts: 1 built-in; 100-FA front and 100-SA side blocks to 4
Companion overload: 193-E / 193-T electronic or 193-K bimetallic, direct-mount
Cross-references
- Schneider LC1D25
- WEG CWB25
- Siemens 3RT2026
- ABB AF26
- Eaton XTCE025C
Field notes
- The 193-E overload's trip class is DIP-selectable — a class 10 setting nuisance-trips hard-starting two-stage recips; class 20 usually fixes it.
- Rockwell coils are keyed by suffix (e.g. *KJ = 24 VAC, *KN = 120 VAC) — verify before ordering, the bodies look identical.
- Aux blocks snap on but can shift during vibration; make sure the latch clicks or your run feedback goes intermittent.
Allen-Bradley (Rockwell) resources
Links go to the manufacturer's current catalog or product page — model-specific pages are often retired, so these stay live.
Manufacturer documentation