BK/MDA-20 – COOPER BUSSMANN

Part Number:

BK/MDA-20

Manufacturer:

COOPER BUSSMANN

Date Code:

RoHS:

Non-RoHS

MSL:

Not Applicable

COO:

CHINA

Description:

20 A Time‑Delay Miniature Fuse, 250 V, 6.3 X 32 mm, Ceramic Cartridge

Datasheet:

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Stock Quantity: 442

Selling Unit: Each

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442 in stock

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Product Details:

Overview

The Eaton BK/MDA-20-R is a high-capacity 20A ceramic cartridge fuse designed for robust circuit protection in both AC and DC applications up to 250V and 125V respectively. Its slow-blow characteristic is critical for mitigating nuisance tripping in circuits with temporary inrush currents, such as motor startup or capacitor charging, while still ensuring prompt interruption of sustained overloads. A key design consideration for engineers is the fuse’s breaking capacity; while rated at 1.5kA AC, its 10kA DC rating highlights its suitability for higher fault current scenarios in DC power systems, a common trade-off where DC interruption capability often exceeds AC counterparts due to arc suppression complexities.

Key Features

Current Rating: 20 A
AC Voltage Rating: 250 V
DC Voltage Rating: 125 V
Response Time: Slow Blow
Dimensions: 0.250″ Dia x 1.250″ L (6.35mm x 31.75mm)
Breaking Capacity: 1.5kA AC / 10kA DC

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

Protection of inductive loads in industrial power supplies
Inrush current management for high-power motor drives
Overcurrent safeguarding in DC-DC converter stages
Primary protection for AC mains input in robust equipment