Eaton S-20 Time-delay Plug Fuse 20A 125V 4-pack

Product Description

The EATON S-20 is a 20-amp, S-Type Fustat time-delay plug fuse designed for circuits that experience repeated inrush current during motor start-up. Its dual-element construction holds through the brief surge of a motor starting without nuisance opening, then responds quickly to sustained overloads or short-circuit conditions. The rejection base is a tamper-resistant, porcelain-threaded design that physically prevents installation of a higher-amperage fuse in the same socket. Rated 125 volts AC with a 10,000-amp interrupting capacity (AIC), this fuse meets UL listing requirements. Sold in a 4-pack.

This fuse is suited for residential and light commercial branch circuits that power inductive motor loads. Typical applications include central air conditioning units, furnace blower motors, swimming pool pumps, and deep freezer compressors. It is also appropriate for any circuit where a motor cycles on and off frequently, making standard non-time-delay fuses prone to unwanted opens. The large clear window allows quick visual inspection to confirm blown status without removing the fuse from the holder.

Key Features

• Dual-element, time-delay design absorbs motor start-up inrush without opening
• S-Type Fustat rejection base prevents substitution with a higher-amp fuse
• Porcelain tamper-resistant threads for code-compliant circuit protection
• 10,000 AIC interrupting rating for reliable fault current protection
• Oversized clear inspection window for fast visual blown-fuse identification
• UL listed for residential and commercial branch-circuit use

Compatibility

Designed for use in S-Type Fustat fuse holders and rejection-base fusible panels rated for plug fuses. Compatible with circuits protecting air conditioners, furnace blowers, swimming pool pumps, deep freezers, and other frequently cycling motor loads at 125 volts AC.

Installation Notes

S-Type plug fuses are installed and serviced by licensed electricians following NEC guidelines for overcurrent protection. Always de-energize and lock out the panel or fusible disconnect before replacing a fuse. Confirm the replacement fuse amperage matches the circuit rating before installation. Do not use an adapter or any device intended to defeat the rejection-base feature.

Technical Specifications

• Amperage: 20A
• Voltage Rating: 125 volts AC
• Interrupting Rating: 10,000 AIC
• Fuse Type: S-Type Fustat Time-Delay Dual Element Plug Fuse
• Base Type: Rejection base, porcelain threads
• Quantity per Pack: 4
• Weight: 0.233 pounds
• Certifications: UL Listed

Standard Information

• Brand: EATON
• Manufacturer Part Number: S-20