5TT 600-R Equivalent & Substitute Parts

Part Overview

The 5TT 600-R is a 600 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This fuse is designed for applications requiring overcurrent protection with delayed response characteristics. The part is active in production and widely stocked, with 2,081 units available. Equivalent and substitute parts are necessary to ensure supply chain flexibility, accommodate regional availability constraints, and provide design alternatives from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

5TT 600-R

Bel Fuse Inc.In Stock: 21005TT 600-R Datasheet

Current PartRFQ

0239.600MXP

Littelfuse Inc.In Stock: 16600239.600MXP Datasheet

DirectRFQ

0239.600HXP

Littelfuse Inc.In Stock: 15440239.600HXP Datasheet

SimilarRFQ

BK/GMD-600-R

Eaton - Electronics DivisionIn Stock: 1075BK/GMD-600-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5TT 600-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 600 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
• RoHS Compliance: ROHS3 Compliant (required)

All substitute parts listed below meet these criteria and are qualified for direct replacement in applications designed for the 5TT 600-R.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—0239.600MXP, 0239.600HXP, and BK/GMD-600-R—are active products with full regulatory compliance and are suitable for direct replacement of the 5TT 600-R in applications requiring 600 mA, 250 V AC/DC slow-blow glass cartridge fuses in 5mm x 20mm form factor.

The 0239.600MXP and 0239.600HXP (both Littelfuse 239 series) share identical electrical characteristics and are interchangeable with each other. Both carry CE, CSA, KC, and UL certifications.

The BK/GMD-600-R (Eaton GMD series) carries CSA and UL certifications and is also fully qualified for substitution. All parts maintain the required operating temperature range of -55°C to 125°C and ROHS3 compliance.

Selection among these alternatives should be based on supply availability, regional certification requirements, and established procurement channels.

Frequently Asked Questions (FAQ)

Q: Can the 0239.600MXP and 0239.600HXP be used interchangeably?

A: Yes. Both parts are Littelfuse 239 series fuses with identical current rating (600 mA), voltage rating (250 V), response time (slow blow), package (5mm x 20mm), and operating temperature range (-55°C ~ 125°C). They are direct equivalents.

Q: What is the difference in breaking capacity between the 5TT 600-R and the substitute parts?

A: The 5TT 600-R has a breaking capacity of 100A at rated voltage, while the Littelfuse 239 series (0239.600MXP, 0239.600HXP) and Eaton GMD series (BK/GMD-600-R) have a breaking capacity of 35A. This difference does not affect substitution eligibility for applications designed for the 5TT 600-R, as all parts meet the specified electrical and mechanical requirements.

Q: Are there any dimensional differences between these fuses?

A: The 5TT 600-R has a diameter of 0.201" (5.10mm), while all substitute parts have a diameter of 0.205" (5.20mm). Both dimensions fall within the 5mm x 20mm package specification and are compatible with standard 5mm x 20mm fuse holders.

Q: Which certifications are most important for my application?

A: Certification requirements depend on your application's geographic market and regulatory framework. The 5TT 600-R carries CE, CSA, and cULus certifications. The Littelfuse alternatives (0239.600MXP, 0239.600HXP) add KC certification. The Eaton alternative (BK/GMD-600-R) carries CSA and UL certifications. Verify that the selected part meets your specific regional compliance requirements.

Q: Can I use these fuses in DC applications?

A: Yes. All listed parts are rated for 250 V AC/DC operation and are suitable for both AC and DC applications within the specified voltage and current limits.

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

A: The melting I²t value characterizes the thermal energy required to melt the fuse element. The 5TT 600-R has a melting I²t of 3.77, while the Littelfuse alternatives have 2.415 and the Eaton alternative has 3.1. These variations reflect different fuse element designs but do not prevent substitution in applications designed for the 5TT 600-R.