Equivalent & Substitute Parts for 2JQ 7-R Glass Cartridge Fuse

Part Overview

The 2JQ 7-R is a 7A fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 350V AC and 140V DC operation. This fuse is designed for applications requiring fast response protection in industrial and commercial equipment. The part is currently active in production with 2,766 units in stock. Alternative equivalent parts may be required due to supply chain considerations, regional availability, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

2JQ 7-R

Bel Fuse Inc.In Stock: 28712JQ 7-R Datasheet

Current PartRFQ

0208007.MXP

Littelfuse Inc.In Stock: 25320208007.MXP Datasheet

SimilarRFQ

0225007.MXUP

Littelfuse Inc.In Stock: 12970225007.MXUP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2JQ 7-R must maintain compatibility across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 7 A
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 2AG, 5mm x 15mm
• Mounting Type: Requires Holder

Voltage Compatibility Criteria: Substitute parts must meet or exceed the AC voltage rating of 350V. The DC voltage rating of 140V is specific to the 2JQ 7-R; substitute parts may have different DC ratings based on manufacturer specifications.

Identified Substitutes:

1. 0208007.MXP (Littelfuse Inc., Series 208): Matches all mandatory parameters with 350V AC rating. Suitable for direct replacement in applications requiring 350V AC operation.

2. 0225007.MXUP (Littelfuse Inc., Series 225): Matches all mandatory parameters but operates at 125V AC. This part is suitable only for applications where the circuit voltage does not exceed 125V AC, representing a voltage-limited substitute.

Parameter Comparison

Engineering Selection Recommendations

0208007.MXP (Littelfuse Inc.) is the primary equivalent substitute for the 2JQ 7-R. Both parts share identical current ratings, voltage ratings, response characteristics, and package specifications. This part maintains full compatibility with applications designed for the 2JQ 7-R and carries CE, cURus, and PSE certifications. The melting I²t value of 40 is slightly lower than the original part's 46, and DC cold resistance is marginally higher at 0.013 Ohms versus 0.01 Ohms. These minor differences remain within acceptable engineering tolerances for fast-blow fuse applications.

0225007.MXUP (Littelfuse Inc.) is a voltage-limited substitute suitable only for circuits operating at 125V AC or lower. This part is not suitable for direct replacement in applications requiring 350V AC operation. Selection of this part requires circuit voltage verification to ensure the application does not exceed 125V AC. This part carries the broadest certification coverage including UL approval and offers the highest breaking capacity at 500A.

All substitute parts maintain ROHS3 compliance and operate within the same temperature range as the original part.

Frequently Asked Questions (FAQ)

Q: Can 0208007.MXP be used as a direct replacement for 2JQ 7-R?

A: Yes. Both parts are 7A fast-blow glass cartridge fuses in 2AG package format with 350V AC ratings. Electrical and mechanical compatibility is maintained. Minor variations in melting I²t and DC cold resistance are within acceptable tolerances for this fuse category.

Q: What is the key difference between 0208007.MXP and 0225007.MXUP?

A: The primary difference is the AC voltage rating. The 0208007.MXP is rated for 350V AC, matching the original 2JQ 7-R specification. The 0225007.MXUP is rated for 125V AC only and must not be used in circuits exceeding this voltage.

Q: Are all substitute parts physically compatible with existing fuse holders?

A: Yes. All listed substitutes use the 2AG package format (5mm x 15mm) and require the same holder type as the 2JQ 7-R. Physical installation compatibility is maintained across all parts.

Q: Which certifications are common across all parts?

A: CE, cURus, and PSE certifications are present on all three parts. The 0225007.MXUP additionally carries CSA and UL approvals.

Q: How do the breaking capacity ratings differ?

A: The 2JQ 7-R specifies 100A AC and 150A DC breaking capacity. The 0208007.MXP specifies 100A breaking capacity. The 0225007.MXUP specifies 500A breaking capacity. Breaking capacity selection depends on the specific circuit protection requirements.

Q: What is the significance of the melting I²t parameter?

A: Melting I²t indicates the thermal energy required to melt the fuse element. The 2JQ 7-R has a melting I²t of 46, while both Littelfuse substitutes have a value of 40. This difference affects the precise time-current response curve and should be evaluated against specific circuit protection requirements.