Fuse Selection Checklist

January 6, 2025

Selection Factors

1. Normal operating current

2. Application voltage (AC or DC)

3. Ambient temperature

4. Overload current and length of time in which the fuse must open

5. Maximum available fault current

6. Pulses, Surge Currents, Inrush Currents, Start-up Currents, and Circuit Transients

7. Physical size limitations, such as length, diameter, or height

8. Agency Approvals required, such as UL, CSA, VDE, METI, MITI or Military

9. Fuse features (mounting type/form factor, ease of removal, axial leads, visual indication, etc.)

10. Fuseholder features, if applicable and associated rerating (clips, mounting block, panel mount, PC board mount, R.F.I. shielded, etc.)

11. Application testing and verification prior to production

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shiyan@aolittel-china.com

+8618925536162

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