Bel Fuse 0680L0750-21 Equivalent & Substitute Parts

Part Overview

The Bel Fuse 0680L0750-21 is a 750 mA, 125 V AC/DC board mount surface mount fuse with slow blow response characteristics. This component is designed for circuit protection in applications requiring reliable overcurrent protection at moderate current levels. The part maintains active product status with full manufacturing support and compliance certifications including AEC-Q200, CE, and cURus approval.

Substitute parts become necessary when the primary part experiences supply constraints, inventory limitations, or when design flexibility permits selection from equivalent alternatives within the same electrical and mechanical parameter range.

Substiute Parts

0680L0750-21

Bel FuseIn Stock: 8730680L0750-21 Datasheet

Current PartRFQ

SST 750

Bel Fuse Inc.In Stock: 1959SST 750 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0680L0750-21 is determined by strict alignment with the following critical parameters:

• Current Rating: 750 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 2-SMD, Square End Block (exact match required)
• Physical Dimensions: 0.240" L x 0.100" W x 0.100" H (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The SST 750 meets all mandatory substitution criteria and is classified as a parametric equivalent. Differences in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and product status do not disqualify substitution when primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

The 0680L0750-21 is the preferred selection for new designs and ongoing production due to its active product status and full manufacturer support. This part carries AEC-Q200, CE, and cURus certifications, ensuring compliance with automotive and industrial standards.

The SST 750 is electrically and mechanically equivalent and maintains identical compliance certifications (AEC-Q200, CE, cULus). However, its obsolete product status indicates limited availability and potential discontinuation of manufacturing support. Selection of the SST 750 is appropriate only when the 0680L0750-21 is unavailable and supply chain constraints necessitate an alternative.

Both parts satisfy ROHS3 compliance and REACH unaffected status, confirming environmental regulatory alignment. The minor differences in breaking capacity and melting I²t do not affect substitution eligibility when primary electrical parameters match.

Frequently Asked Questions (FAQ)

Q: Can the SST 750 be used as a direct replacement for the 0680L0750-21?

A: Yes. The SST 750 meets all mandatory electrical and mechanical substitution criteria: 750 mA current rating, 125 V AC/DC voltage rating, slow blow response, surface mount configuration, and identical physical dimensions. Both parts are manufactured by Bel Fuse and carry equivalent compliance certifications.

Q: What is the significance of the product status difference between these parts?

A: The 0680L0750-21 maintains active status with ongoing manufacturing and support. The SST 750 is obsolete, indicating limited future availability. For new designs and long-term production, the 0680L0750-21 is the recommended choice.

Q: Are there differences in breaking capacity between these parts?

A: The 0680L0750-21 specifies 50A AC and 100A DC breaking capacity, while the SST 750 specifies 50A breaking capacity. Both parts function identically for circuit protection at the 750 mA rated current. Breaking capacity differences do not affect substitution eligibility when primary electrical parameters align.

Q: Do packaging differences affect substitution?

A: Both parts use identical 2-SMD, Square End Block packaging with matching physical dimensions (0.240" L x 0.100" W x 0.100" H). Packaging is functionally equivalent for PCB assembly and mounting applications.

Q: Are both parts compliant with automotive and industrial standards?

A: Yes. Both the 0680L0750-21 and SST 750 carry AEC-Q200 certification, confirming suitability for automotive applications. Both also hold CE and cURus/cULus certifications for industrial and consumer applications.