Equivalent & Substitute Parts for 0680L2000-21

Part Overview

The 0680L2000-21 is a 2 A, 125 V AC/DC board mount surface mount fuse manufactured by Bel Fuse Inc. in the 0680L series. This component is classified as Active product status and is designed for applications requiring slow blow response characteristics in a 2-SMD, square end block package. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and mounting configurations are maintained across the product line, enabling component interchangeability in circuit designs where the primary part becomes unavailable or when alternative performance characteristics are required.

Key Parameters

Parameter	Value
Current Rating	2 A
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

Substitution eligibility for the 0680L2000-21 is determined by strict equivalence across the following critical parameters: current rating (2 A), AC voltage rating (125 V), DC voltage rating (125 V), response time (Slow Blow), mounting type (Surface Mount), package configuration (2-SMD, Square End Block), and physical dimensions (0.240" L x 0.100" W x 0.100" H). All identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional compatibility within the same circuit application context.

The substitute parts are grouped into two categories based on series designation:

0680L Series Substitutes: Parts 0680L2000-01 and 0680L2000-05 maintain identical electrical ratings, response characteristics, and mechanical form factors as the primary part 0680L2000-21. These parts share the same series lineage and approval certifications (AEC-Q200, CE, cURus).

0680H Series Substitute: Part 0680H2000-05 maintains equivalent electrical ratings and mechanical dimensions but differs in breaking capacity and melting I²t characteristics, representing an alternative design variant within the Bel Fuse board mount fuse portfolio.

Parameter Comparison

Parameter	0680L2000-21	0680L2000-01	0680L2000-05	0680H2000-05
Manufacturer	Bel Fuse Inc.	Bel Fuse	Bel Fuse	Bel Fuse Inc.
Current Rating (Amps)	2 A	2 A	2 A	2 A
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	50A AC, 100A DC	50A AC, 100A DC	50A AC, 100A DC	100A AC, 500A DC
Melting I²t	6	6	6	3.6
DC Cold Resistance	0.068 Ohms	0.068 Ohms	0.068 Ohms	0.095 Ohms
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
Approval Agency	AEC-Q200, CE, cURus	AEC-Q200, CE, cURus	AEC-Q200, CE, cURus	cURus
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

0680L2000-01 and 0680L2000-05: These parts are direct parametric equivalents to the 0680L2000-21, sharing identical electrical specifications, breaking capacity ratings, melting I²t values, and DC cold resistance. Both parts carry the same approval certifications (AEC-Q200, CE, cURus) and ROHS3 compliance status. Selection between these three 0680L series parts is determined by inventory availability and supply chain considerations, as they are functionally interchangeable.

0680H2000-05: This part maintains electrical equivalence in current and voltage ratings but operates with enhanced breaking capacity (100A AC, 500A DC versus 50A AC, 100A DC) and reduced melting I²t (3.6 versus 6). The 0680H2000-05 carries cURus certification only, without AEC-Q200 and CE certifications present on the 0680L series. Selection of the 0680H2000-05 requires confirmation that the application does not mandate AEC-Q200 or CE compliance, and that the higher breaking capacity and faster response characteristics are compatible with circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can 0680L2000-01 and 0680L2000-05 be used interchangeably with 0680L2000-21?

A: Yes. These parts are parametric equivalents with identical current ratings (2 A), voltage ratings (125 V AC/DC), response time (Slow Blow), package configuration (2-SMD, Square End Block), physical dimensions, and approval certifications. They are functionally interchangeable in circuit applications.

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

A: The primary differences are breaking capacity and melting I²t characteristics. The 0680L series (0680L2000-21, 0680L2000-01, 0680L2000-05) provides 50A AC / 100A DC breaking capacity with melting I²t of 6. The 0680H series (0680H2000-05) provides 100A AC / 500A DC breaking capacity with melting I²t of 3.6, indicating faster response to overcurrent conditions. Certification scope also differs: 0680L parts include AEC-Q200 and CE certifications, while 0680H2000-05 carries cURus certification only.

Q: Can 0680H2000-05 replace 0680L2000-21 in all applications?

A: Electrical substitution is possible due to matching current and voltage ratings. However, the 0680H2000-05 exhibits different breaking capacity and response characteristics. Applications requiring AEC-Q200 or CE compliance cannot use the 0680H2000-05. Confirm that the higher breaking capacity and faster melting I²t do not conflict with circuit protection design parameters before substitution.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts (0680L2000-01, 0680L2000-05, 0680H2000-05) are supplied in Tape & Reel (TR) packaging, matching the 0680L2000-21 packaging configuration.

Q: What compliance standards apply to each part?

A: 0680L2000-21, 0680L2000-01, and 0680L2000-05 carry AEC-Q200, CE, and cURus approvals with ROHS3 compliance and REACH Unaffected status. 0680H2000-05 carries cURus approval with ROHS3 compliance. Verify compliance requirements for your specific application before selecting a substitute part.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message