SCHURTER 0034.5235 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.5235 is a 3A 250VAC slow-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a compatible holder and is designed for AC/DC applications with a 100A breaking capacity at rated voltage.

Key Parameters

Parameter	Value
Current Rating	3 A
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Fuse Type	Cartridge, Glass
Breaking Capacity @ Rated Voltage	100A
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SCHURTER 0034.5235 is determined by strict equivalence across the following parameters:

Current Rating: 3 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Size / Dimension: 0.250" Dia x 1.250" L (exact match required)

All substitute parts listed meet these core electrical and mechanical parameters. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not affect functional interchangeability within the specified electrical envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	RoHS Status
0034.5235	SCHURTER Inc.	3	250	Slow Blow	100A	180	—	Obsolete	ROHS3 Compliant
0313003.MXP	Littelfuse Inc.	3	250	Slow Blow	100A	200	0.0593	Active	ROHS3 Compliant
BK/MDL-3-R	Eaton - Electronics Division	3	250	Slow Blow	100A	67.5	0.057	Active	ROHS3 Compliant
BK/MDQ-3	Eaton - Electronics Division	3	250	Slow Blow	100A	—	0.05715	Active	RoHS non-compliant
MDL-3-R	Eaton - Electronics Division	3	250	Slow Blow	100A	67.5	0.057	Active	RoHS Compliant
MDQ-3	Eaton - Electronics Division	3	250	Slow Blow	35A	—	0.05715	Active	Not Applicable
0313003.HXIDP	Littelfuse Inc.	3	250	Slow Blow	100A	200	0.0593	Active	ROHS3 Compliant
0313003.HXP	Littelfuse	3	250	Slow Blow	100A	200	0.0593	Active	ROHS3 Compliant
0313003.VXIDP	Littelfuse Inc.	3	250	Slow Blow	100A	200	0.0593	Active	ROHS3 Compliant
0313003.VXP	Littelfuse	3	250	Slow Blow	100A	200	0.0593	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring ROHS3 compliance and active product status, the Littelfuse 313 series parts (0313003.MXP, 0313003.HXP, 0313003.HXIDP, 0313003.VXIDP, 0313003.VXP) are preferred direct replacements. These parts maintain identical electrical specifications and are currently in active production.

The Eaton MDL-3-R and BK/MDL-3-R variants are functionally equivalent with lower melting I²t values (67.5 vs. 180–200) and reduced DC cold resistance. These parts are suitable for applications where thermal response characteristics align with system requirements.

The Eaton MDQ-3 and BK/MDQ-3 variants exhibit a reduced breaking capacity of 35A compared to the original 100A specification. These parts are not recommended as direct substitutes for applications requiring the full 100A breaking capacity.

Frequently Asked Questions (FAQ)

Q: Can MDQ-3 be used as a direct substitute for SCHURTER 0034.5235?

A: No. The MDQ-3 variants have a breaking capacity of 35A, while the original part specifies 100A. This difference affects fault protection performance and makes MDQ-3 unsuitable for direct substitution.

Q: What is the difference between Littelfuse 313 series variants (HXP, HXIDP, VXP, VXIDP, MXP)?

A: All Littelfuse 313 series variants meet the core electrical parameters (3A, 250V, slow-blow, 100A breaking capacity). Differences exist in approval agency certifications and packaging designations. Selection should be based on specific regulatory requirements for the application.

Q: Are Eaton MDL-3-R and BK/MDL-3-R interchangeable?

A: Yes. Both parts are electrically and mechanically identical. BK/MDL-3-R is the prefixed variant designation. Selection between them depends on supplier availability and internal part numbering conventions.

Q: Does the melting I²t difference between SCHURTER (180) and Littelfuse (200) affect compatibility?

A: The melting I²t values fall within acceptable tolerance for slow-blow fuse characteristics. Both values support the same 3A current rating and 100A breaking capacity. The difference does not prevent functional substitution.

Q: Which substitute part has the best RoHS compliance status?

A: All Littelfuse 313 series parts and Eaton MDL-3-R are ROHS3 compliant. The Eaton BK/MDQ-3 is RoHS non-compliant. For applications requiring RoHS certification, select from the compliant variants.

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