JJS-30V Equivalent & Substitute Parts Reference

Part Overview

The JJS-30V is a 30A 600VAC fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division under the Limitron™ JJS series. This component is classified as an active product and serves as an overcurrent protection device in electrical and industrial applications. The cartridge design requires a compatible holder for installation. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in existing installations.

Substiute Parts

JJS-30V

Eaton - Bussmann Electrical DivisionIn Stock: 2272JJS-30V Datasheet

Current PartRFQ

JLLS030.T

Littelfuse Inc.In Stock: 859JLLS030.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the JJS-30V are identified based on strict alignment of the following electrical and mechanical parameters:

• Current Rating: 30A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Fast Blow (exact match required)
• Class: T (exact match required)
• Breaking Capacity: 200kA (exact match required)
• Physical Dimensions: Cartridge form factor with compatible diameter and length tolerances
• Approval Certifications: CE, CSA, and UL compliance

The JLLS030.T from Littelfuse Inc. meets all substitution criteria. This part maintains identical electrical performance characteristics and mechanical compatibility while offering additional DC voltage rating capability (300 VDC), which does not restrict its use in AC-only applications.

Parameter Comparison

Engineering Selection Recommendations

Both the JJS-30V and JLLS030.T are active products with current manufacturing support. Selection between these parts should be based on:

• Holder compatibility: Verify that the existing fuse holder accommodates the cartridge diameter tolerance range (0.560" to 0.563" diameter difference is within typical mechanical tolerances for cartridge fuse holders).
• Certification requirements: Both parts carry CE and CSA certifications. The JJS-30V includes UL certification, while the JLLS030.T includes UR certification. Confirm which certification body approval is required for your application.
• DC voltage capability: The JLLS030.T provides additional 300 VDC rating, which may be advantageous in applications requiring future DC circuit protection capability without component substitution.
• Supply chain considerations: Inventory availability differs between manufacturers; select based on procurement lead time and stock requirements.

Frequently Asked Questions (FAQ)

Q: Can JLLS030.T replace JJS-30V in existing installations?

A: Yes, provided the fuse holder accommodates the minor diameter variation (0.560" vs 0.563"). Both parts are Class T, 30A, 600 VAC cartridge fuses with identical breaking capacity and response time characteristics.

Q: What is the significance of the DC voltage rating on the JLLS030.T?

A: The JLLS030.T includes a 300 VDC rating in addition to its 600 VAC rating. This does not affect AC-only applications but provides flexibility if the circuit is later modified to include DC protection requirements.

Q: Are there dimensional compatibility concerns?

A: The diameter difference is 0.003" (0.03mm), which falls within standard mechanical tolerances for cartridge fuse holders. Length is identical at 1.500". Verify holder specifications if uncertainty exists.

Q: Which certifications should I prioritize?

A: Both parts meet CE and CSA standards. If UL certification is mandatory, specify JJS-30V. If UR certification is acceptable, JLLS030.T is qualified. Consult your application's regulatory requirements.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both indicate RoHS compliance. ROHS3 refers to compliance with the most recent RoHS 3 directive. Both parts meet environmental restriction requirements for hazardous substances.