GSAP 2-R Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The GSAP 2-R is a 2A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG package format. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and approval certifications to ensure direct interchangeability without circuit redesign.

Substiute Parts

GSAP 2-R

Bel Fuse Inc.In Stock: 1017GSAP 2-R Datasheet

Current PartRFQ

0325002.MXP

Littelfuse Inc.In Stock: 10220325002.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSAP 2-R is determined by strict equivalence across the following parameters:

• Current Rating: Must be 2 A
• Voltage Rating - AC: Must be 250 V minimum
• Fuse Type: Must be Cartridge, Ceramic
• Response Time: Must be Slow Blow
• Package / Case: Must be 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Mounting Type: Must be Through Hole
• Operating Temperature Range: Must support -55°C ~ 125°C
• Approval Certifications: Must include CE, CSA, and PSE at minimum

The substitute part 0325002.MXP (Littelfuse Inc., Series 325) meets all mandatory substitution criteria. This part maintains identical AC voltage and current ratings, ceramic construction, slow-blow response, and physical dimensions. The substitute provides additional DC voltage capability (125V DC) and enhanced breaking capacity on DC circuits (10kA DC vs. AC-only specification), representing a superset of the original part's electrical performance envelope.

Parameter Comparison

Engineering Selection Recommendations

The 0325002.MXP (Littelfuse Inc.) is the qualified substitute for the obsolete GSAP 2-R. Selection is based on the following engineering criteria:

• Electrical equivalence: Identical 2A/250VAC ratings and slow-blow response characteristics
• Mechanical compatibility: Matching 3AB/3AG package dimensions and through-hole mounting interface
• Regulatory compliance: Both parts maintain CE, CSA, and PSE certifications; the substitute adds UL certification
• Product availability: The substitute is in active production status with confirmed inventory, whereas the original part is obsolete
• Environmental specifications: Both parts operate across the identical -55°C to 125°C temperature range and are ROHS3 compliant

The substitute's additional DC voltage rating (125V DC) and enhanced DC breaking capacity (10kA DC) do not compromise AC circuit performance and provide extended application flexibility for mixed-voltage environments.

Frequently Asked Questions (FAQ)

Q: Can the 0325002.MXP be used as a direct replacement for the GSAP 2-R in existing circuits?

A: Yes. Both parts share identical AC voltage (250V), current (2A), response time (slow-blow), and physical dimensions (3AB/3AG, 1/4" x 1-1/4"). No circuit modifications are required for substitution in AC applications.

Q: What is the significance of the melting I²t difference (61 vs. 80)?

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The substitute's higher I²t (80) represents a slightly higher thermal threshold. Both values fall within the slow-blow fuse category and maintain the same current rating, ensuring compatible overcurrent protection behavior in the intended application.

Q: Are the dimensional tolerances compatible between these parts?

A: The parts have minimal dimensional variation (0.272" vs. 0.275" diameter; 1.280" vs. 1.288" length). These differences are within standard mechanical tolerances for 3AB/3AG cartridge fuses and do not affect mechanical fit in standard fuse holders.

Q: Does the substitute's DC voltage rating affect AC-only circuit performance?

A: No. The substitute's 125V DC rating is an additional capability that does not alter AC circuit behavior. In AC-only applications, the part functions identically to the original GSAP 2-R.

Q: What certifications should be verified for compliance-critical applications?

A: Both parts carry CE, CSA, and PSE certifications. The substitute adds UL certification. For applications requiring specific regional compliance (North America, Europe, Asia-Pacific), verify that the required certification body is present on the selected part's documentation.

Q: Is the DC cold resistance difference (0.115 vs. 0.121 Ohms) significant?

A: The 0.006 Ohm difference represents approximately 5% variation and is within normal manufacturing tolerances for ceramic cartridge fuses. This difference does not materially affect circuit performance in standard applications.