Product Description
Allen-Bradley 100-C23B10 — 23A IEC Contactor, 480V AC Coil, 15 HP @ 460V, 1 NO Aux
The Allen-Bradley 100-C23B10 is a 3-pole, 23A AC-3 IEC contactor with a 440V AC (50Hz) / 480V AC (60Hz) coil (B suffix) and 1 Normally Open (NO) built-in base auxiliary contact (10 suffix). It is rated at 15 HP at 460V three-phase and is part of Rockwell Automation’s Bulletin 100-C series. The 480V coil is used when the control circuit operates directly at line voltage without a step-down transformer. Compatible overloads are the 193-T series bimetallic (direct mount, 2.9–25A) and 193-E series electronic overloads. For the 120V coil version, see the 100-C23D10.
Quick Specifications
- Part Number: 100-C23B10
- Current Rating: 23A AC-3 / 32A AC-1
- Poles: 3-pole, non-reversing
- Coil Voltage: 440V AC (50Hz) / 480V AC (60Hz) — B suffix
- Aux Contact (built-in): 1 NO, base-mounted (left-side only)
- Terminal Type: Screw terminals
- Mounting: 35mm DIN rail or panel base mount
- Compatible Overload: 193-T bimetallic (2.9–25A) or 193-E electronic (direct mount)
- Protection: IP20 finger-safe terminals
- Certifications: UL, CSA, IEC/EN 60947-4-1, CE
Catalog Number Decode — 100-C23B10
| Position | Code | Meaning |
|---|---|---|
| Bulletin | 100 | Bulletin 100-C IEC contactor series |
| Frame | C23 | 23A AC-3, 15 HP @ 460V |
| Coil | B | 440V AC (50Hz) / 480V AC (60Hz) |
| Aux Suffix | 10 | 1 NO auxiliary contact built-in (base-mounted) |
HP Ratings by Voltage
| Supply Voltage | HP Rating | Phase |
|---|---|---|
| 230V AC | 7.5 HP | Three-phase |
| 460V AC | 15 HP | Three-phase |
100-C23 Coil Variants — Select Your Control Voltage
All 100-C23 variants share the same 23A AC-3 / 15 HP @ 460V rating and 1 NO aux configuration (with the “10” suffix). Select the coil voltage that matches your control circuit.
| Part Number | Coil Voltage | Coil Code |
|---|---|---|
| 100-C23KJ10 | 24V AC, 50/60 Hz | KJ |
| 100-C23D10 | 110V AC (50Hz) / 120V AC (60Hz) | D |
| 100-C23L10 | 208–240V AC, 60 Hz | L |
| 100-C23B10 (this item) | 440V AC (50Hz) / 480V AC (60Hz) | B |
| 100-C23ZJ10 | 24V DC (electronic coil) | ZJ |
For no built-in aux, order the “00” suffix equivalent (e.g., 100-C23B00). For 1 NC built-in, order the “01” suffix. Call Kent Electrical Supply at 1-800-222-5129 to confirm availability of additional variants.
Allen-Bradley 100-C Series — Frame Overview
| Frame | AC-3 | HP @ 460V | Base Aux | Overload |
|---|---|---|---|---|
| 100-C09 | 9A | 5 HP | 1 NO (left only) | 193-T bimetallic |
| 100-C12 | 12A | 7.5 HP | 1 NO (left only) | 193-T bimetallic |
| 100-C16 | 16A | 10 HP | 1 NO (left only) | 193-T bimetallic |
| 100-C23 (this item) | 23A | 15 HP | 1 NO (left only) | 193-T bimetallic |
| 100-C30 | 30A | 20 HP | 0 (select by suffix) | 193-T bimetallic |
| 100-C37 | 37A | 25 HP | 0 (select by suffix) | 193-E electronic |
Compatible Overload Relays
The 100-C23B10 accepts both 193-T bimetallic and 193-E electronic direct-mount overload relays. The 193-T is the standard thermal overload; the 193-E is a solid-state electronic overload with additional diagnostics. Select the range covering your motor’s nameplate full-load amperage.
| Part Number | Current Range | Type |
|---|---|---|
| 193-T1AB40 | 2.9–4.0A | 193-T Bimetallic |
| 193-T1AB48 | 3.5–4.8A | 193-T Bimetallic |
| 193-T1AB63 | 4.5–6.3A | 193-T Bimetallic |
| 193-T1AB75 | 5.5–7.5A | 193-T Bimetallic |
| 193-T1AC10 | 7.0–10.0A | 193-T Bimetallic |
| 193-T1AC12 | 9.0–12.5A | 193-T Bimetallic |
| 193-T1AC16 | 11.3–16.0A | 193-T Bimetallic |
| 193-T1AC20 | 15.0–20.0A | 193-T Bimetallic — typical for 15 HP @ 460V |
| 193-T1AC25 | 21.0–25.0A | 193-T Bimetallic |
| 193-1EFCB | 1.0–5.0A | 193-E Electronic (solid-state) |
| 193-1EFDB | 3.2–16.0A | 193-E Electronic (solid-state) |
| 193-1EFEB | 5.4–27.0A | 193-E Electronic (solid-state) |
For a 15 HP motor at 460V, the typical FLA is 21A. The 193-T1AC25 (21–25A) is the most common overload selection. Call Kent Electrical Supply at 1-800-222-5129 for overload sizing assistance.
Product Features
- 480V AC Coil — Line-Voltage Control: The “B” coil suffix designates 440V AC (50Hz) / 480V AC (60Hz). This coil is used when the control circuit runs at line voltage without a step-down transformer — common in small pump panels, legacy equipment, and international 440V/50Hz installations. Do not use the 480V coil with 24V DC PLC outputs; for PLC-controlled applications use the ZJ (24V DC electronic) coil version.
- 1 NO Aux Built-In, Left-Side Mount Only: The 100-C23B10 includes 1 Normally Open (NO) base-mounted auxiliary contact (the “10” suffix). On the 100-C23 frame and smaller, auxiliary contact blocks mount on the left side only. Right-side mounting is available on 100-C30 and larger. Add 100-FA front-mount blocks or 100-SB/100-SA left-side blocks for additional contacts.
- 193-T Bimetallic or 193-E Electronic Overload: The 100-C23 frame accepts both the 193-T bimetallic (simple, proven, economical) and the 193-E solid-state electronic overload relay. The 193-E adds trip-class selection, ground fault protection, and diagnostic LED indication but costs more. Both direct-mount to the bottom of the contactor. The highlighted 193-T1AC20 (15–20A) is the typical selection for a 15 HP, 460V motor with FLA around 21A — confirm against the motor nameplate before ordering.
- Reversible Coil Terminals: The 100-C series coil module has reversible terminations, allowing the coil wires to enter from either side of the contactor for wiring flexibility in tight panel layouts.
- IP20 Finger-Safe Terminals: Power and control terminals are IP20 finger-protected, meeting industrial panel safety standards for open-panel wiring without additional guarding.
In Stock at Kent Electrical Supply — Emmaus, PA — Same-Day Shipping on Orders Before 4:00 PM EST.
Frequently Asked Questions
What does the "B" coil code mean on the 100-C23B10?
The B coil code on Allen-Bradley 100-C contactors designates 440V AC (50Hz) / 480V AC (60Hz). This is the coil for panels where the control circuit runs at 480V line voltage. Other common coil codes: D=110/120V AC, KJ=24V AC, L=208–240V AC, ZJ=24V DC. The coil code is the letter(s) between the frame size and the aux suffix in the catalog number: 100-C23B10.
When would I use a 480V coil contactor instead of a 120V coil?
A 480V coil contactor is used when the control circuit operates directly at 480V (440V) without a step-down control transformer. Common applications include simple 2-wire pump and fan controls where the HOA switch is wired at line voltage, older industrial machines without a separate control transformer, and some European/international equipment using 440V 50Hz supply. In modern panel designs with PLCs, the 120V or 24V DC coil is more common, as the PLC’s I/O voltage is typically much lower than line voltage.
What overload relay should I use for a 15 HP motor at 460V?
A typical 15 HP, 460V NEMA Design B motor has a nameplate FLA of approximately 21A. The correct overload for this application is the 193-T1AC25 (21–25A range), set to the motor’s exact nameplate FLA. If the motor nameplate shows a lower FLA (e.g., a more efficient motor at 18–19A), the 193-T1AC20 (15–20A) may be appropriate instead. Always set the overload dial to the motor nameplate FLA, not the contactor’s maximum current rating.
Can I add auxiliary contacts to both sides of the 100-C23B10?
No — the 100-C23 frame supports auxiliary contact block mounting on the left side only. Right-side auxiliary mounting is a feature of the larger 100-C30 and above frames. For the 100-C23, add additional contacts using front-mount 100-FA series blocks or left-side-mount 100-SA/100-SB blocks, all available as add-on options at checkout.
What is the difference between the 193-T and 193-E overload relays?
The 193-T is a bimetallic thermal overload relay — simple, reliable, and economical. It protects against overload and phase loss using bimetallic strips heated by motor current. The 193-E is a solid-state electronic overload relay with additional features: selectable trip class, ground fault detection, phase unbalance protection, and a diagnostic LED indicator. The 193-E is more expensive but provides better diagnostics and flexibility. Both series direct-mount to the 100-C23 contactor without additional wiring.
Does the 100-C23B10 qualify for same-day shipping?
Yes — the 100-C23B10 is in stock at Kent Electrical Supply’s warehouse in Emmaus, PA and ships same business day when ordered before 4:00 PM EST. For 193-T or 193-E overload relays, 100-FA/100-SA auxiliary blocks, or bulk orders, call 1-800-222-5129 or text your RFQ to 484-425-0652.
