SCHURTER 0034.6806 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.6806 is a 125 mA, 250 V AC / 125 V DC board mount fuse with slow blow response time, designed for through-hole radial mounting in the MST 250 series. This component is classified as Active product status with full RoHS3 compliance and international approvals (CCC, cURus, KC, VDE). Substitute parts are identified to provide design flexibility, alternative sourcing options, and packaging variations while maintaining electrical and mechanical compatibility within specified parameter ranges.

Key Parameters

Parameter	Value
Current Rating	125 mA
Voltage Rating - AC	250 V
Voltage Rating - DC	125 V
Response Time	Slow Blow
Mounting Type	Through Hole
Package / Case	Radial, Can, Vertical
Breaking Capacity @ Rated Voltage	35A AC, 50A DC
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Current Rating: 125 mA (exact match required for direct substitution)
Voltage Rating - AC: 250 V (minimum requirement)
Response Time: Slow Blow (characteristic must match)
Mounting Type: Through Hole (mechanical compatibility)
Package / Case: Radial, Can, Vertical (form factor compatibility)
Breaking Capacity @ Rated Voltage: 35A minimum (safety requirement)

Secondary Consideration:

Manufacturer: Littelfuse TR5® 372 series parts meet all primary criteria

Parts with Matching Current Rating (125 mA):

Littelfuse 37201250001 (Cut Tape packaging)
Littelfuse 37201250411 (Bulk packaging)

Parts with Different Current Ratings (Not Direct Substitutes):

Littelfuse 37202500411 (250 mA) — higher current rating
Littelfuse 37205000411 (500 mA) — higher current rating
Littelfuse 37211000411 (1 A) — higher current rating

Parameter Comparison

Parameter	SCHURTER 0034.6806	Littelfuse 37201250001	Littelfuse 37201250411
Manufacturer	SCHURTER Inc.	Littelfuse	Littelfuse Inc.
Current Rating (Amps)	125 mA	125 mA	125 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
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Breaking Capacity @ Rated Voltage	35A AC, 50A DC	35A	35A
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)	0.335" Dia x 0.315" H (8.50mm x 8.00mm)	0.335" Dia x 0.315" H (8.50mm x 8.00mm)
Operating Temperature Range	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CCC, cURus, KC, VDE	CCC, cURus, SEMKO, VDE	CCC, cURus, SEMKO, VDE
Packaging Type	Cut Tape (CT)	Cut Tape (CT)	Bulk

Engineering Selection Recommendations

Direct Substitutes (125 mA Rating):

Littelfuse 37201250001 and 37201250411 are functionally equivalent to SCHURTER 0034.6806 based on matching current rating, voltage rating, response time, and mounting configuration. Both parts maintain ROHS3 compliance and carry international safety approvals (CCC, cURus, VDE). Selection between these two depends on packaging requirements: Cut Tape (CT) for 37201250001 or Bulk for 37201250411.

Operating Temperature Consideration:

The SCHURTER 0034.6806 operates across -55°C ~ 125°C, while Littelfuse equivalents operate across -40°C ~ 85°C. Applications requiring operation below -40°C or above 85°C must retain the SCHURTER part.

Higher Current Rating Parts (Not Direct Substitutes):

Littelfuse 37202500411 (250 mA), 37205000411 (500 mA), and 37211000411 (1 A) are listed as related parts but do not qualify as direct substitutes due to higher current ratings. These parts are suitable only for circuit designs requiring higher current protection thresholds.

Frequently Asked Questions (FAQ)

Q: Can Littelfuse 37201250001 or 37201250411 be used as a direct replacement for SCHURTER 0034.6806?

A: Yes. Both Littelfuse parts match the critical electrical parameters: 125 mA current rating, 250 V AC voltage rating, slow blow response time, and through-hole radial mounting. Both are ROHS3 compliant with equivalent safety approvals. The primary difference is packaging format (Cut Tape vs. Bulk) and a narrower operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C).

Q: What is the difference between Littelfuse 37201250001 and 37201250411?

A: Both parts are electrically and mechanically identical. The difference is packaging: 37201250001 is supplied in Cut Tape (CT) format, while 37201250411 is supplied in Bulk format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why are Littelfuse 37202500411, 37205000411, and 37211000411 listed if they cannot substitute the SCHURTER part?

A: These parts are listed as related products within the TR5® 372 series but have different current ratings (250 mA, 500 mA, and 1 A respectively). They are not direct substitutes for the 125 mA SCHURTER 0034.6806 and must not be used in circuits designed for 125 mA protection.

Q: Are there any dimensional compatibility concerns with the Littelfuse substitutes?

A: The Littelfuse parts have a slightly reduced height (0.315" vs. 0.335") while maintaining the same 0.335" diameter. This minor dimensional difference does not affect through-hole mounting compatibility on standard PCB layouts designed for radial fuses.

Q: What approvals do the substitute parts carry?

A: Littelfuse 37201250001 and 37201250411 carry CCC, cURus, SEMKO, and VDE approvals. The SCHURTER original includes KC approval in addition to CCC, cURus, and VDE. Both sets of approvals meet international safety standards for board mount fuses.

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