SCHURTER 0034.1746 Glass Cartridge Fuse 1A 250VAC 3AB 3AG Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.1746 is a 1 A 250 V AC/DC fast-blow glass cartridge fuse in 3AB/3AG form factor (0.250" Dia x 1.252" L). This component requires a compatible fuse holder for installation. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing system support and procurement.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Size / Dimension	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 0034.1746 is determined by strict equivalence in the following parameters:

Current Rating: 1 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core electrical and mechanical criteria. Variations in breaking capacity, melting I²t, approval agencies, and operating temperature ranges are permitted within the substitution framework, as these parameters do not affect basic form-fit-function compatibility in holder-based installations.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage (AC)	Response Time	Package / Case	Size / Dimension	Breaking Capacity @ Rated Voltage	Operating Temperature	Product Status	Approval Agency
0034.1746	SCHURTER Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.252" L (6.35mm x 31.80mm)	35 A	-40°C ~ 85°C	Obsolete	CSA
0034.5125	SCHURTER Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.252" L (6.35mm x 31.80mm)	200 A	-55°C ~ 125°C	Obsolete	CSA, UL
0001.1024	SCHURTER Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.252" L (6.35mm x 31.80mm)	1.5 kA	-40°C ~ 85°C	Obsolete	Not specified
0312001.TXP	Littelfuse Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	35 A	-55°C ~ 125°C	Active	CE, CSA, KC, PSE, UL
0312001.VXP	Littelfuse Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	35 A	-55°C ~ 125°C	Active	CE, CSA, KC, PSE, UL
0312001.HXP	Littelfuse Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	35 A	-55°C ~ 125°C	Active	CE, CSA, KC, PSE, UL
0312001.MXP	Littelfuse Inc.	1 A	250 V	Fast Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	35 A	-55°C ~ 125°C	Active	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

For applications currently using SCHURTER 0034.1746, the following selection criteria apply:

Primary Recommendation: Littelfuse 0312001.VXP, 0312001.HXP, or 0312001.MXP are preferred substitutes. These parts are in active production status, carry comprehensive international approvals (CE, CSA, KC, PSE, UL), and maintain identical electrical specifications. The minor dimensional variance (0.250" L vs. 1.252" L) is within standard manufacturing tolerance for 3AB/3AG form factors and does not affect holder compatibility.

Secondary Options: SCHURTER 0034.5125 and 0001.1024 provide equivalent electrical performance and are from the original manufacturer. Both remain obsolete but offer extended operating temperature ranges and higher breaking capacities. SCHURTER 0034.5125 includes UL certification in addition to CSA.

Compatibility Assurance: All substitute parts share identical current rating (1 A), voltage rating (250 V AC), response time (fast blow), and package form factor (3AB/3AG). Physical dimensions are within standard tolerance for this fuse category. Holder compatibility is maintained across all listed substitutes.

Frequently Asked Questions (FAQ)

Q: Can I use Littelfuse 0312001.VXP as a direct replacement for SCHURTER 0034.1746?

A: Yes. Both parts are 1 A, 250 V AC fast-blow glass cartridge fuses in 3AB/3AG form factor. The dimensional difference (0.250" L vs. 1.252" L) is within standard tolerance for this fuse type and does not affect holder compatibility.

Q: What is the difference between SCHURTER 0034.5125 and 0034.1746?

A: Both are SCHURTER 1 A, 250 V AC fast-blow fuses in 3AB/3AG form factor. The 0034.5125 has a higher breaking capacity (200 A vs. 35 A), extended operating temperature range (-55°C to 125°C vs. -40°C to 85°C), and includes UL certification. Both are obsolete.

Q: Why are there multiple Littelfuse part numbers (0312001.TXP, 0312001.VXP, 0312001.HXP, 0312001.MXP) with identical specifications?

A: These part numbers represent different packaging or distribution variants within the Littelfuse 312 series. All share identical electrical and mechanical specifications and are functionally equivalent for holder-based installations.

Q: Are there any dimensional concerns when substituting with Littelfuse parts?

A: Littelfuse parts measure 0.250" Dia x 1.250" L, compared to the original 0.250" Dia x 1.252" L. This 0.002" difference is within standard manufacturing tolerance for 3AB/3AG fuses and does not affect holder fit or function.

Q: Which substitute part has the broadest international approvals?

A: Littelfuse 0312001.TXP, 0312001.VXP, 0312001.HXP, and 0312001.MXP all carry CE, CSA, KC, PSE, and UL certifications, providing the widest regulatory coverage for global applications.

Q: Is the SCHURTER 0034.1746 still available?

A: The part is classified as obsolete. However, 1,104 pieces are reported in stock. For long-term supply assurance, transition to an active-status substitute such as Littelfuse 0312001.VXP, 0312001.HXP, or 0312001.MXP is recommended.

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