SCHURTER 0034.6944 Board Mount Fuse 800mA 250VAC Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.6944 is an 800 mA, 250 V AC/DC board mount fuse with radial, can, vertical package configuration. This through-hole component is designed for circuit protection in electronic equipment requiring slow-blow response characteristics. The part is currently active in production with full inventory availability. Equivalent and substitute parts are identified when identical electrical ratings and mechanical compatibility are maintained across the specified parameter set.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.6944 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Primary Matching Parameters:

Current Rating: 800 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can, Vertical (exact match required)
Size / Dimension: 0.335" Dia x 0.335" H (8.50mm x 8.50mm) (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)

Secondary Considerations:

Breaking Capacity and Melting I²t values may vary within acceptable ranges for the same current and voltage ratings
Approval Agency certifications may differ based on regional requirements
Series designation may differ (MXT 250 vs. MSTU 250)

Two substitute parts meet these criteria: SCHURTER 0034.6914 and SCHURTER 0034.7214.

Parameter Comparison

Parameter	0034.6944 (Main)	0034.6914 (Substitute)	0034.7214 (Substitute)
Manufacturer	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.
Current Rating (Amps)	800 mA	800 mA	800 mA
Voltage Rating - AC	250 V	250 V	250 V
Response Time	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Through Hole	Through Hole	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
Breaking Capacity @ Rated Voltage	100A	100A	50A
Melting I²t	1.5	1.5	4.05
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Series	MXT 250	MXT 250	MSTU 250
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CCC, cURus, KC, VDE	CCC, cURus, KC, VDE	cULus

Engineering Selection Recommendations

SCHURTER 0034.6914: This part is a direct parametric equivalent to the 0034.6944, sharing identical electrical ratings, mechanical dimensions, and thermal operating range. Both parts are from the MXT 250 series with matching breaking capacity (100A) and melting I²t (1.5). Approval agencies include CCC, cURus, KC, and VDE certifications. This substitute provides full compatibility for applications requiring the same circuit protection characteristics.

SCHURTER 0034.7214: This part matches all primary electrical and mechanical parameters but differs in secondary characteristics. The breaking capacity is reduced to 50A (compared to 100A in the main part), and the melting I²t is increased to 4.05 (compared to 1.5). This part is from the MSTU 250 series and carries cULus certification only. Selection of this substitute requires confirmation that the reduced breaking capacity and altered thermal response are acceptable for the specific application.

All three parts maintain ROHS3 compliance and identical physical dimensions, supporting direct board-level substitution where electrical characteristics are compatible.

Frequently Asked Questions (FAQ)

Q: Can 0034.6914 be used as a direct replacement for 0034.6944?

A: Yes. The 0034.6914 is a parametric equivalent with identical current rating (800 mA), voltage rating (250 V), response time (Slow Blow), mounting type (Through Hole), package configuration (Radial, Can, Vertical), physical dimensions (0.335" Dia x 0.335" H), operating temperature range (-40°C ~ 85°C), breaking capacity (100A), and melting I²t (1.5). Both parts carry the same approval certifications.

Q: What are the differences between 0034.7214 and the main part 0034.6944?

A: The 0034.7214 maintains identical electrical ratings and physical dimensions but differs in two secondary parameters: breaking capacity is 50A (versus 100A) and melting I²t is 4.05 (versus 1.5). The part is from a different series (MSTU 250 versus MXT 250) and carries cULus certification only, compared to the broader certification set of the main part.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts share identical physical dimensions (0.335" Dia x 0.335" H / 8.50mm x 8.50mm) and mounting type (Through Hole, Radial, Can, Vertical), supporting direct board-level substitution without layout modifications.

Q: What approval certifications apply to each part?

A: The 0034.6944 and 0034.6914 carry CCC, cURus, KC, and VDE certifications. The 0034.7214 carries cULus certification. Selection should account for regional regulatory requirements.

Q: When should 0034.7214 be selected over 0034.6944?

A: The 0034.7214 should be selected only when the application requirements specifically allow for reduced breaking capacity (50A) and altered thermal response characteristics (melting I²t of 4.05). Applications requiring the full 100A breaking capacity and 1.5 melting I²t should use 0034.6944 or 0034.6914.

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