Bussmann MDQ-3 Time-Delay Fuse, 250V Small Dimension

Bussmann MDQ-3 Time-Delay Fuse, 250V Small Dimension

The Bussmann MDQ-3 Time-Delay Fuse is manufactured as part of the Eaton Bussmann series and is designed to protect wiring, components, and connected equipment from damaging overcurrent conditions. This fuse carries a 250V rating and uses a time-delay (TD) design, allowing it to ride through brief inrush currents and momentary overloads — such as those seen at motor start-up, transformer energization, or capacitor switching — without opening unnecessarily, while still responding to sustained overcurrent or short-circuit conditions. Built in a small-dimension (SM DIM) form factor, the MDQ-3 is sized to fit compact fuse holders, fuse blocks, and equipment where board space is at a premium, making it a practical, code-appropriate replacement fuse for 250V time-delay applications.

Key Features

• Series & Model: Manufactured as part of the Eaton Bussmann MDQ series under model number MDQ-3, providing a recognizable, traceable part number for replacement and reordering.
• Voltage Rating: Rated for 250V circuits, matching the voltage class commonly found in control panels, small transformers, and general-purpose equipment.
• Time-Delay (TD) Operation: The time-delay element is engineered to tolerate temporary current surges, such as motor inrush or transformer magnetizing current, reducing nuisance fuse blowing compared to fast-acting fuse types.
• Small Dimension (SM DIM) Body: A compact, small-dimension body allows the MDQ-3 to be used in space-limited fuse holders and equipment enclosures where a standard-size fuse will not fit.
• Reliable Overcurrent Protection: Designed to open and interrupt the circuit when sustained overcurrent conditions occur, helping protect downstream wiring and connected equipment from damage.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Control Circuit and Small Transformer Protection
• General-Purpose Equipment Overcurrent Protection
• Commercial and Industrial Electrical Panels
• Fuse Holders and Fuse Blocks with Limited Mounting Space
• Fuse Replacement in Existing 250V Installations

Why Bussmann?

Eaton Bussmann is a recognized manufacturer of circuit protection products, and the MDQ series time-delay fuse reflects that engineering focus on dependable overcurrent protection. Choosing the Bussmann MDQ-3 for your 250V time-delay application helps ensure consistent, code-compliant circuit protection for professional and industrial electrical work.