Equivalent & Substitute Parts for 0680L0630-21

Part Overview

The Bel Fuse Inc. 0680L0630-21 is a 630 mA surface mount board mount fuse rated for 125 V AC/DC operation. This component is classified as Active product status and is designed for applications requiring overcurrent protection in compact form factors. Substitute parts are identified based on matching electrical ratings, mechanical compatibility, and functional performance characteristics within the 0680 series fuse family.

Key Parameters

Parameter	Value
Current Rating	630 mA
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Slow Blow
Mounting Type	Surface Mount
Package / Case	2-SMD, Square End Block
Size / Dimension	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 0680L0630-21 are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain identical current rating (630 mA) and voltage ratings (125 V AC/DC), ensuring functional equivalence in overcurrent protection circuits.

Mechanical Compatibility: All substitute parts share the same package type (2-SMD, Square End Block) and physical dimensions (0.240" L x 0.100" W x 0.100" H), enabling direct board-level replacement without layout modifications.

Thermal Compatibility: All substitute parts operate within the same temperature range (-55°C ~ 125°C), maintaining performance across equivalent environmental conditions.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, meeting the same environmental and handling requirements.

The substitute parts are organized into two categories based on breaking capacity and melting I²t characteristics:

0680L Series (0680L0630-01, 0680L0630-05): Identical electrical and mechanical specifications to the main part, with 50A AC / 100A DC breaking capacity and 0.43 melting I²t.
0680H Series (0680H0630-05): Enhanced breaking capacity (100A AC / 500A DC) and lower melting I²t (0.2), representing a higher-performance variant within the same form factor.

Parameter Comparison

Parameter	0680L0630-21	0680L0630-01	0680L0630-05	0680H0630-05
Manufacturer	Bel Fuse Inc.	Bel Fuse Inc.	Bel Fuse Inc.	Bel Fuse Inc.
Current Rating (Amps)	630 mA	630 mA	630 mA	630 mA
Voltage Rating - AC	125 V	125 V	125 V	125 V
Voltage Rating - DC	125 V	125 V	125 V	125 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block
Size / Dimension	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)
Breaking Capacity @ Rated Voltage (AC)	50A	50A	50A	100A
Breaking Capacity @ Rated Voltage (DC)	100A	100A	100A	500A
Melting I²t	0.43	0.43	0.43	0.2
DC Cold Resistance (Ohms)	0.41	0.41	0.41	0.83
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

0680L0630-01 and 0680L0630-05: These parts are direct functional equivalents to the 0680L0630-21, sharing identical electrical ratings, breaking capacity, and melting I²t characteristics. Both parts carry AEC-Q200, CE, and cURus certifications, matching the compliance profile of the main part. Selection between these three 0680L variants is determined by inventory availability and packaging requirements, as all three are electrically and mechanically interchangeable.

0680H0630-05: This part represents a higher-performance alternative within the same physical form factor. The 0680H series provides enhanced breaking capacity (100A AC / 500A DC versus 50A AC / 100A DC) and faster response characteristics (0.2 melting I²t versus 0.43). This variant is suitable for applications requiring superior fault current handling. However, the 0680H0630-05 carries only cURus certification, whereas the main part includes AEC-Q200 and CE certifications. Selection of the 0680H variant requires confirmation that cURus certification alone satisfies application compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can 0680L0630-01 and 0680L0630-05 be used interchangeably with 0680L0630-21?

A: Yes. These parts are parametric equivalents with identical current ratings (630 mA), voltage ratings (125 V AC/DC), breaking capacity (50A AC / 100A DC), melting I²t (0.43), and physical dimensions. All three parts are certified to AEC-Q200, CE, and cURus standards. Substitution requires no circuit modifications.

Q: What is the difference between the 0680L and 0680H series?

A: The primary differences are breaking capacity and melting I²t. The 0680L series (including the main part) provides 50A AC / 100A DC breaking capacity with 0.43 melting I²t. The 0680H series provides 100A AC / 500A DC breaking capacity with 0.2 melting I²t, enabling faster response and superior fault current handling. Both series maintain identical current ratings, voltage ratings, and physical form factors.

Q: Can the 0680H0630-05 replace the 0680L0630-21 in all applications?

A: The 0680H0630-05 is electrically compatible and physically interchangeable. However, the certification profile differs: the 0680H variant carries cURus certification only, while the main part includes AEC-Q200 and CE certifications. Substitution is valid only when cURus certification satisfies application requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed (0680L0630-21, 0680L0630-01, 0680L0630-05, and 0680H0630-05) are ROHS3 compliant with MSL Level 1 rating.

Q: What is the significance of DC Cold Resistance differences?

A: The 0680L series maintains 0.41 Ohms DC cold resistance, while the 0680H series is rated at 0.83 Ohms. This parameter reflects internal resistance characteristics and does not affect functional substitution for overcurrent protection applications. Selection based on this parameter requires application-specific circuit analysis.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message