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SCHURTER 0034.5139 Equivalent & Substitute Parts
Part Overview
The SCHURTER 0034.5139 is a 5 A 250 V AC/DC fast-blow glass fuse cartridge in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing system support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Current Rating | 5 A |
| Voltage Rating (AC) | 250 V |
| Fuse Type | Cartridge, Glass |
| Response Time | Fast Blow |
| Package / Case | 3AB, 3AG, 1/4" x 1-1/4" |
| Size / Dimension | 0.250" Dia x 1.252" L (6.35mm x 31.80mm) |
| Breaking Capacity @ Rated Voltage | 200A |
| Operating Temperature Range | -55°C ~ 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict equivalence across the following parameters:
- Current Rating: 5 A (exact match required)
- Voltage Rating (AC): 250 V (exact match required)
- Fuse Type: Cartridge, Glass (exact match required)
- Response Time: Fast Blow (exact match required)
- Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
- Size / Dimension: 0.250" Dia x 1.252" L or 0.250" Dia x 1.250" L (functionally equivalent)
- Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
All substitute parts listed meet these criteria. The ceramic fuse variant (8020.5075) is classified as a similar part due to higher voltage rating (500 V) and different fuse material, suitable only where voltage headroom is acceptable.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Current Rating (A) | Voltage Rating (V AC) | Fuse Type | Response Time | Package / Case | Breaking Capacity (A) | Operating Temperature (°C) | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| 0034.5139 | SCHURTER Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Obsolete |
| 0312005.MXCCP | Littelfuse | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 100 | -55 ~ 125 | Active |
| 0312005.TXP | Littelfuse Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| 0312005.VXP | Littelfuse Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| 0312005.HXP | Littelfuse Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| 0312005.MXP | Littelfuse Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| 3AG 5-R | Bel Fuse Inc. | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| FSA-5A | OptiFuse | 5 | 250 | Cartridge, Glass | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 200 | -55 ~ 125 | Active |
| 8020.5075 | SCHURTER Inc. | 5 | 500 | Cartridge, Ceramic | Fast Blow | 3AB, 3AG, 1/4" x 1-1/4" | 1500 | -40 ~ 85 | Active |
Engineering Selection Recommendations
Direct equivalents to SCHURTER 0034.5139 are available from Littelfuse (0312005.TXP, 0312005.VXP, 0312005.HXP, 0312005.MXP), Bel Fuse (3AG 5-R), and OptiFuse (FSA-5A). All maintain identical electrical and mechanical specifications with active product status and full compliance certifications (CE, CSA, UL, PSE, KC).
Littelfuse 0312005.MXCCP provides functional equivalence with reduced breaking capacity (100A vs. 200A), suitable for applications where lower fault current interruption is acceptable.
SCHURTER 8020.5075 is a similar part offering higher voltage rating (500V) and ceramic construction. Selection requires confirmation that the application tolerates ceramic fuse characteristics and reduced operating temperature ceiling (85°C maximum).
Frequently Asked Questions (FAQ)
Q: Can 0312005.MXCCP replace 0034.5139 in all applications?
A: 0312005.MXCCP is electrically and mechanically equivalent but has a lower breaking capacity (100A vs. 200A). It is suitable for circuits where the maximum fault current does not exceed 100A. Verify circuit fault current ratings before substitution.
Q: What is the difference between glass and ceramic fuse variants?
A: Glass fuses (0034.5139 and all direct equivalents) and ceramic fuses (8020.5075) differ in construction material and performance characteristics. Ceramic fuses offer higher breaking capacity and voltage rating but operate at lower maximum temperature. Selection depends on circuit requirements and thermal environment.
Q: Are all substitute parts mechanically compatible with 3AB/3AG holders?
A: Yes. All listed parts conform to 3AB/3AG package specifications (1/4" x 1-1/4" form factor). Dimensional variations between 0.250" Dia x 1.252" L and 0.250" Dia x 1.250" L are within holder tolerance and do not affect mechanical fit.
Q: Which substitute offers the best compliance coverage?
A: Littelfuse 0312005.TXP, 0312005.VXP, 0312005.HXP, and 0312005.MXP all carry identical compliance certifications (CE, CSA, KC, PSE, UL). Bel Fuse 3AG 5-R and OptiFuse FSA-5A also meet or exceed required standards. Selection may be based on supply availability and procurement preference.
Q: Is the SCHURTER 8020.5075 ceramic fuse a direct replacement?
A: No. While mechanically compatible, 8020.5075 differs in voltage rating (500V vs. 250V), fuse material (ceramic vs. glass), and operating temperature range (-40°C to 85°C vs. -55°C to 125°C). Use only where circuit design accommodates these differences.
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