Product Description
Benshaw RSC-18-6AC120 RediStart Contactor — 18A, 3-Pole, 120V Coil
The Benshaw RSC-18-6AC120 is an 18A, 3-pole IEC contactor from the RediStart RSC series with a 120V AC coil. Rated at 10 HP at 460V three-phase (18A AC-3), the RSC-18-6AC120 includes 1 Normally Open (NO) + 1 Normally Closed (NC) base-mounted auxiliary contacts as standard. It mounts on 35mm DIN rail, uses screw terminals, and accepts the SPO-22 series overload relay for direct-mount motor starter protection. All Benshaw RSC series contactors carry a 2-year warranty.
Quick Specifications
- Current Rating: 18A AC-3
- HP Rating: 5 HP @ 230V / 10 HP @ 460V (three-phase)
- Poles: 3-pole, non-reversing
- Coil Voltage: 120V AC, 60 Hz
- Aux Contacts (built-in): 1 NO + 1 NC (single base-mounted block)
- Terminal Type: Screw terminals
- Mounting: 35mm DIN rail or screw panel mount
- Additional Aux: Top-mount auxiliary blocks available
- Compatible Overload: SPO-22 series (direct mount)
- Weight: 0.75 lbs
- Warranty: 2 years (Benshaw Promise)
- Certifications: UL, CSA, IEC, NEMA, BS, EN, VDE
RSC-18 Coil Voltage Variants
| Part Number | Coil Voltage | Notes |
|---|---|---|
| RSC-18-6AC120 (this item) | 120V AC, 60 Hz | Most common US |
| RSC-18-6AC208 | 208V AC, 60 Hz | AC |
| RSC-18-6AC240 | 240V AC, 60 Hz | AC |
| RSC-18-6AC24 | 24V AC, 60 Hz | AC |
Need a different coil voltage? Call Kent Electrical Supply at 1-800-222-5129 or text your RFQ to 484-425-0652.
HP Ratings by Voltage
| Supply Voltage | HP Rating | Phase |
|---|---|---|
| 230V AC | 5 HP | Three-phase |
| 460V AC | 10 HP | Three-phase |
Benshaw RSC Small-Frame Series Overview
| Model | AC-3 | HP @ 460V | Aux (built-in) | Aux Style | Overload |
|---|---|---|---|---|---|
| RSC-9 | 9A | 5 HP | 1 NO + 1 NC | Base-mounted | SPO-22 |
| RSC-12 | 12A | 7.5 HP | 1 NO + 1 NC | Base-mounted | SPO-22 |
| RSC-18 (this item) | 18A | 10 HP | 1 NO + 1 NC | Base-mounted | SPO-22 |
| RSC-22 | 22A | 10 HP | 1 NO + 1 NC | Base-mounted | SPO-22 |
| RSC-32 | 32A | 20 HP | 1 NO + 1 NC | Side-mounted | SPO-22 |
Product Features
- 10 HP at 460V: The RSC-18-6AC120 is rated for 10 HP at 460V three-phase (18A AC-3), suitable for motor starters in pumps, fans, conveyors, and general industrial applications at this horsepower range. At 230V, it is rated 5 HP.
- 1 NO + 1 NC Base-Mounted Auxiliary Contacts: The RSC-18-6AC120 includes a single base-mounted auxiliary contact block providing 1 NO + 1 NC standard. This is the auxiliary contact style for RSC-9 through RSC-22 contactors. The RSC-32 and larger frames use side-mounted auxiliary blocks. Additional top-mount auxiliary contact blocks can be added to the RSC-18 for expanded control circuit requirements.
- SPO-22 Series Overload Compatible: The RSC-18-6AC120 is compatible with the Benshaw SPO-22 series bimetallic overload relay, which mounts directly to the contactor load terminals for a complete motor starter assembly. The SPO-22 series is the same overload family used across RSC-9 through RSC-32 contactors. Select the SPO-22 current range based on your motor’s full-load amperage.
- 120V AC Coil — 6AC120 Designation: The 6AC120 suffix specifies a 120V AC, 60 Hz coil. Other coil voltages available include 208V (RSC-18-6AC208) and 240V AC. The “6” prefix in the coil code designates the standard RSC-9 through RSC-85 coil series.
- Finger-Proof Design, DIN Rail Mount: The RSC-18 features a finger-proof terminal design, mounts on standard 35mm DIN rail, and includes integral phase barriers. Compact size suitable for tight panel layouts.
- 2-Year Benshaw Warranty: All Benshaw RSC series contactors carry a 2-year warranty — double the 1-year standard of most contactor manufacturers. Benshaw calls this The Benshaw Promise.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping.
Frequently Asked Questions
What overload relay is compatible with the RSC-18-6AC120?
The RSC-18-6AC120 is compatible with the Benshaw SPO-22 series bimetallic overload relay. The SPO-22 mounts directly to the T1-T2-T3 load terminals of the RSC-18 for a complete motor starter assembly. The same SPO-22 family covers RSC-9 through RSC-32 contactors, making it a versatile single overload series for a wide range of RSC small-frame motor starters. Select the current range based on your motor’s nameplate full-load amperage. Call Kent Electrical Supply at 1-800-222-5129 for overload selection assistance.
What is the difference between the RSC-18 and RSC-22?
The RSC-18 (18A AC-3, 10 HP @ 460V) and RSC-22 (22A AC-3, 10 HP @ 460V) share the same HP rating at 460V but differ in current capacity. The RSC-22 handles higher full-load amperage (up to 22A AC-3 vs. 18A) and is the appropriate choice for motors with FLA between 18A and 22A. Both use the same SPO-22 overload series, base-mounted 1 NO + 1 NC auxiliary contacts, and the same 6AC coil suffix system.
How does the auxiliary contact mounting on the RSC-18 differ from the RSC-32?
The RSC-18 (and RSC-9, RSC-12, RSC-22) uses a single base-mounted auxiliary contact block that provides 1 NO + 1 NC. The RSC-32 uses a side-mounted auxiliary contact block. While both provide 1 NO + 1 NC standard, the mounting orientation differs. Additional top-mount auxiliary blocks are available for the RSC-18 to expand contact capacity.
What does the "6AC120" designation mean in RSC-18-6AC120?
The coil designation breaks down as follows: 6 = the standard RSC-9 through RSC-85 coil series; AC = alternating current coil; 120 = 120V AC rated voltage. Other coil voltages use the same “6AC” prefix with a different voltage number: 6AC208 = 208V, 6AC240 = 240V, 6AC24 = 24V AC.
Does the RSC-18-6AC120 qualify for same-day shipping?
Yes — the RSC-18-6AC120 is a stocked item at Kent Electrical Supply’s warehouse in Emmaus, PA. Orders placed before 4:00 PM EST ship same business day. For SPO-22 overload relays, alternate coil voltage variants, or bulk orders, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
