Bussmann MDL-20 Time Delay Fuse

Reliable Overcurrent Protection with In-Rush Tolerance

Overview

The Bussmann MDL-20 is a 20 Amp time-delay (slow-blow) fuse engineered to safeguard electrical circuits against sustained overloads and short circuits. Designed for compatibility with standard Edison-base fuse holders, its time-delay characteristic allows temporary in-rush currents (common in motors, transformers, and inductive loads) without nuisance blowing, while ensuring robust protection under prolonged fault conditions.

Key Features

• Precise Protection: 20A current rating with time-delay functionality to accommodate initial surge currents (e.g., motor startups).
• High Interrupt Rating: Safely interrupts up to 10kA short-circuit currents, preventing catastrophic failures.
• Universal Voltage: Rated for 250V AC systems (residential/commercial) and 125V DC applications.
• Durable Construction: Ceramic body with tin-plated brass end caps for corrosion resistance and stable conductivity.
• Standard Size: 1/4″ x 1-1/4″ (6.3mm x 32mm) dimensions fit most industry-standard fuse clips and holders.
• Safety Compliance: UL Listed and CSA Certified for reliability across North America.

Applications

Ideal for:

• Motor controls, HVAC systems, and power supplies
• Transformers, solenoids, and compressor circuits
• Industrial control panels and machinery
• Legacy electrical systems with Edison-base fuse panels

Why Choose MDL-20?

Bussmann’s MDL series delivers trusted performance in demanding environments. The MDL-20 combines fail-safe protection with surge tolerance, minimizing downtime and maintenance costs. Its compact, non-inductive design ensures consistent performance without false trips.

Specifications

• Amperage: 20A
• Voltage: 250V AC / 125V DC
• Type: Time-Delay (Dual-Element)
• Interrupt Rating: 10,000A
• Dimensions: 1/4″ x 1-1/4″
• Standards: UL 248-14, CSA C22.2

For optimal safety, always replace with identical amperage and type. Consult local electrical codes before installation.

> This description highlights technical specifications, core benefits, and applications while adhering to Markdown formatting. It emphasizes the fuse's dual-element design for surge tolerance and safety compliance, targeting both professional electricians and industrial users.