Equivalent & Substitute Parts for 3JQ 1.5-R Glass Fuse Cartridge

Part Overview

The 3JQ 1.5-R is a fast-blow glass fuse cartridge manufactured by Bel Fuse Inc., rated for 1.5 A at 350 V AC and 140 V DC. This component is designed for through-hole mounting in the 2AG package format (5mm x 15mm axial configuration). The part maintains active product status with full regulatory compliance including CE, CSA, and cURus certifications. Alternative equivalent parts may be required due to inventory availability, supply chain considerations, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

3JQ 1.5-R

Bel Fuse Inc.In Stock: 11343JQ 1.5-R Datasheet

Current PartRFQ

020801.5MXEP

Littelfuse Inc.In Stock: 1781020801.5MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3JQ 1.5-R is determined by strict alignment of the following critical parameters:

• Current Rating: Must be 1.5 A
• Voltage Rating - AC: Must be 350 V minimum
• Package / Case: Must be 2AG, 5mm x 15mm (Axial)
• Mounting Type: Must be Through Hole
• Fuse Type: Must be Cartridge, Glass
• Response Time: Must be Fast Blow

The substitute part 020801.5MXEP (Littelfuse Inc.) meets all mandatory electrical and mechanical criteria for direct substitution. Both parts share identical current ratings, AC voltage ratings, package specifications, and response characteristics. Minor variations in DC voltage rating and physical dimensions remain within acceptable tolerance for mechanical fit and electrical performance in standard through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 3JQ 1.5-R and 020801.5MXEP are active products with full regulatory compliance. The 3JQ 1.5-R carries CSA certification in addition to CE and cURus approvals, while the 020801.5MXEP includes PSE certification. Selection between these parts should be based on specific regional compliance requirements and application certifications. The 020801.5MXEP exhibits lower melting I²t (0.8 versus 1.4) and higher DC cold resistance (0.0712 versus 0.056 Ohms), which may influence thermal response characteristics in specific circuit designs. Both parts are suitable for standard through-hole PCB applications requiring 1.5 A protection at 350 V AC.

Frequently Asked Questions (FAQ)

Q: Can the 020801.5MXEP replace the 3JQ 1.5-R in all applications?

A: The 020801.5MXEP meets all mandatory electrical and mechanical substitution criteria including current rating, AC voltage rating, package format, and response time. However, applications requiring specific DC voltage ratings or CSA certification should verify compatibility with the substitute part's specifications and certifications.

Q: What is the significance of the different melting I²t values?

A: The melting I²t parameter (1.4 for 3JQ 1.5-R versus 0.8 for 020801.5MXEP) indicates the thermal energy required to melt the fuse element. The lower value in the substitute part results in faster thermal response. This difference may be relevant in circuits with specific thermal protection requirements.

Q: Are the physical dimensions interchangeable?

A: Both parts conform to the 2AG package standard (5mm x 15mm axial). The 3JQ 1.5-R measures 0.217" Dia x 0.591" L (5.50mm x 15.00mm), while the 020801.5MXEP measures 0.185" Dia x 0.570" L (4.70mm x 14.48mm). These minor dimensional variations remain within standard 2AG tolerance and are mechanically compatible with standard through-hole fuse holders.

Q: Which certifications should I prioritize for my application?

A: The 3JQ 1.5-R includes CE, CSA, and cURus certifications. The 020801.5MXEP includes CE, cURus, and PSE certifications. Select the part whose certification portfolio aligns with your target market and application requirements.

Q: What is the difference in DC cold resistance between these parts?

A: The 3JQ 1.5-R has 0.056 Ohms DC cold resistance, while the 020801.5MXEP has 0.0712 Ohms. This difference affects resistive heating under DC conditions. In applications with sustained DC current near the rated 1.5 A, the lower resistance of the 3JQ 1.5-R may result in slightly lower heat dissipation.