SCHURTER 0034.3416 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.3416 is an 800 mA, 250 V AC/DC slow-blow glass fuse cartridge in 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component sourcing. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability in existing applications.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Fuse Type	Cartridge, Glass
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35 A
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Current Rating: 800 mA (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)
Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these criteria. Variations in melting I²t, breaking capacity, and approval agencies do not preclude substitution when all primary electrical and mechanical parameters align.

Parameter Comparison

Parameter	0034.3416 (SCHURTER)	0034.5224 (SCHURTER)	0313.800MXP (Littelfuse)	TSA-800MA (OptiFuse)	0313.800HXP (Littelfuse)	0313.800VXP (Littelfuse)
Current Rating (Amps)	800 mA	800 mA	800 mA	800 mA	800 mA	800 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.252" L (6.35mm x 31.80mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	35 A	35 A	35 A	100 A	35 A	35 A
Melting I²t	2.2	10.5	8	1.542	8	8
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CE	CSA, UL	CE, CSA, UL	cULus, UL 248	CE, CSA, UL	CE, CSA, UL

Engineering Selection Recommendations

The SCHURTER 0034.3416 is obsolete; active alternatives are required for new sourcing. Among available substitutes, the Littelfuse 313 series parts (0313.800MXP, 0313.800HXP, 0313.800VXP) and OptiFuse TSA-800MA all satisfy the core electrical and mechanical requirements.

For applications requiring CE compliance alone, the SCHURTER 0034.5224 remains available but is also obsolete. For new designs and ongoing production, active parts with broader certification coverage are preferred: Littelfuse 0313.800MXP, 0313.800HXP, and 0313.800VXP carry CE, CSA, and UL approvals; OptiFuse TSA-800MA carries cULus and UL 248 certification.

The TSA-800MA exhibits a higher breaking capacity (100 A versus 35 A) and lower melting I²t (1.542 versus 2.2–10.5), reflecting different thermal response characteristics. The Littelfuse 313 series maintains closer alignment to the original melting I²t specification (8 versus 2.2).

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 0034.3416 be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes maintain identical current rating (800 mA), voltage rating (250 V AC), response time (slow blow), fuse type (cartridge, glass), and package format (3AB, 3AG, 1/4" x 1-1/4"). Direct mechanical and electrical interchangeability is confirmed.

Q: What is the significance of the melting I²t variation among substitutes?

A: Melting I²t defines the thermal energy required to melt the fuse element. Variations (2.2 to 10.5) reflect different internal element designs. All substitutes are rated for the same current and voltage; the I²t difference does not affect compatibility in standard 800 mA, 250 V applications.

Q: Why does the OptiFuse TSA-800MA have a higher breaking capacity (100 A) than the original part (35 A)?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The TSA-800MA's higher rating reflects enhanced fault-handling capability. This does not affect normal operation at 800 mA and does not preclude substitution.

Q: Are there compliance differences between substitutes?

A: The original SCHURTER 0034.3416 carries CE approval only. The SCHURTER 0034.5224 adds CSA and UL. Littelfuse 313 series parts (0313.800MXP, 0313.800HXP, 0313.800VXP) carry CE, CSA, and UL. OptiFuse TSA-800MA carries cULus and UL 248. Selection should align with system certification requirements.

Q: Is the 0.002" length difference in the TSA-800MA (1.252" versus 1.250") significant?

A: The difference (0.002" or 0.05mm) is within standard mechanical tolerance for 3AB/3AG cartridge fuses and does not affect holder compatibility or performance.

Q: Which substitute is recommended for new production?

A: Active parts with comprehensive certification are preferred. Littelfuse 0313.800MXP, 0313.800HXP, and 0313.800VXP are all active with CE, CSA, and UL approvals. OptiFuse TSA-800MA is active with cULus and UL 248 certification. Selection depends on specific system compliance requirements.

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