3JQ 6 Equivalent & Substitute Parts

Part Overview

The 3JQ 6 is a fast-blow glass cartridge fuse rated for 6 A at 350 V AC and 140 V DC, designed for through-hole mounting in 2AG package format (5mm x 15mm axial). This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

3JQ 6

Bel Fuse Inc.In Stock: 7703JQ 6 Datasheet

Current PartRFQ

3JQ 6-R

Bel Fuse Inc.In Stock: 9823JQ 6-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3JQ 6-R qualifies as a direct substitute for the 3JQ 6 based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Current rating: 6 A (exact match)
• Voltage ratings: 350 V AC and 140 V DC (exact match)
• Package format: 2AG, 5mm x 15mm axial (exact match)
• Response time: Fast Blow (exact match)
• Breaking capacity: 100A AC, 150A DC (exact match)
• Melting I²t: 35 (exact match)
• DC cold resistance: 0.012 Ohms (exact match)
• Operating temperature range: -55°C ~ 125°C (exact match)
• Approval certifications: CE, CSA, cURus, PSE (exact match)

Parameter Comparison

Engineering Selection Recommendations

The 3JQ 6-R is the direct equivalent for the obsolete 3JQ 6. Both parts are manufactured by Bel Fuse Inc. and share identical electrical specifications, mechanical dimensions, and regulatory certifications. The primary distinction is product status and RoHS compliance: the 3JQ 6-R is active and ROHS3 compliant, whereas the 3JQ 6 is obsolete and RoHS non-compliant. For new designs and ongoing production, the 3JQ 6-R is the appropriate selection. The identical electrical and thermal characteristics ensure direct functional equivalence in all circuit applications where the 3JQ 6 was previously specified.

Frequently Asked Questions (FAQ)

Q: Can the 3JQ 6-R be used as a direct replacement for the 3JQ 6?

A: Yes. The 3JQ 6-R is electrically and mechanically identical to the 3JQ 6. All current ratings, voltage ratings, breaking capacity, response time, and physical dimensions are identical. No circuit modifications are required.

Q: What is the difference between the 3JQ 6 and 3JQ 6-R?

A: The primary differences are product status and regulatory compliance. The 3JQ 6 is obsolete and RoHS non-compliant. The 3JQ 6-R is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting the 3JQ 6-R for the 3JQ 6?

A: No. Both parts use the 2AG package format with identical 5mm x 15mm axial dimensions, mounting type (through-hole), and all electrical parameters. Direct substitution is valid without design changes.

Q: What certifications apply to both parts?

A: Both the 3JQ 6 and 3JQ 6-R carry CE, CSA, cURus, and PSE approvals, ensuring compliance with international safety standards.

Q: Why should I transition from the 3JQ 6 to the 3JQ 6-R?

A: The 3JQ 6 is obsolete, making future procurement difficult. The 3JQ 6-R is an active part with confirmed supply availability and improved RoHS3 compliance for modern manufacturing requirements.