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Publication Date: 05/1/2011
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Bel: 3812 Size Medium-Blow Fuses
Medium-blow fuse.
Jersey City, NJ — New from Bel Fuse is the square ceramic surface-mountable SMM Series of 3812 size medium-blow fuses. These SMD fuses have rated current values up to 30A and voltage ratings up to 250VAC and 65VDC. They satisfy the industry's requirements for devices supporting high power consumption with limited board space.

RoHs-compliant, Pb-free and halogen free, the environmentally friendly parts provide superior mechanical integrity, and resistance to chemical solvents and aqueous cleaning.

The new SMM fuses are suitable for overcurrent protection in a broad spectrum of high-current applications in which a small form factor device is specified to optimize board space. Included among their most common usage is protection of high-current circuits (primary or secondary) of larger power supplies, as well as in the protection of (telecom) backplane structures from overloads or short circuits, which could disrupt an entire system. Notably, the SMM fuse can isolate a specific section or circuit, allowing the remaining circuits to function normally.

Offered with 20A, 25A, and 30A ratings, the SMM Series has an operating temperature range of -55 to +85°C with proper derating. At 100 percent of ampere rating, opening time is 4 hours minimum; 60 seconds maximum at 200 percent of ampere rating. Fuses are manufactured with ceramic bodies with matte tin-plated brass caps. Parts are provided on 13-in. reels, 2,000 per reel.

Contact: Bel Fuse Inc., 206 Van Vorst St. Jersey City, NJ 07302 800-235-3873 fax:201-432-9542 Web:

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