SCHURTER 2040.0615 Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The SCHURTER 2040.0615 is a 1 A, 250 V AC board mount fuse with radial, can, vertical package configuration. This part is classified as obsolete. Equivalent and substitute parts are available from SCHURTER Inc. and Littelfuse Inc. with active product status, offering improved availability and extended operational support.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating - AC	250 V
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical
Response Time	Slow Blow
Size / Dimension	0.335" Dia x 0.335" H (8.50mm x 8.50mm)
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following core parameters: current rating (1 A), AC voltage rating (250 V), mounting type (through hole), fuse type (board mount), package configuration (radial, can, vertical), response time (slow blow), and physical dimensions (0.335" Dia x 0.335" H). Parts are grouped into two categories:

Direct Equivalent (SCHURTER MST 250 Series): Part 0034.6615 maintains identical electrical specifications with added DC voltage rating (125 V DC) and enhanced breaking capacity. This part is a direct functional replacement with extended operational temperature range (-55°C ~ 125°C) and active product status.

Parametric Equivalents (SCHURTER MXT 250 and MSTU 250 Series): Parts 0034.6915, 0034.6945, 0034.7115, and 0034.7215 share core electrical parameters (1 A, 250 V AC, slow blow response) and identical physical dimensions. These parts differ in breaking capacity and melting I²t characteristics while maintaining compatibility with the original mounting footprint and electrical requirements.

Similar Part (Littelfuse TE5® 385 Series): Part 38511000440 operates at reduced AC voltage (125 VAC) with identical current rating (1 A) and similar package dimensions. This part is suitable only for applications with 125 VAC maximum voltage requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Breaking Capacity @ Rated Voltage	Melting I²t	Response Time	Operating Temperature	Product Status
2040.0615	SCHURTER Inc.	MSU 250	1	250	—	35A	12	Slow Blow	-40°C ~ 85°C	Obsolete
0034.6615	SCHURTER Inc.	MST 250	1	250	125	35A AC, 50A DC	12	Slow Blow	-55°C ~ 125°C	Active
0034.6915	SCHURTER Inc.	MXT 250	1	250	—	100A	4.4	Slow Blow	-40°C ~ 85°C	Active
0034.6945	SCHURTER Inc.	MXT 250	1	250	—	100A	4.4	Slow Blow	-40°C ~ 85°C	Active
0034.7115	SCHURTER Inc.	MSTU 250	1	250	—	50A	6.85	Slow Blow	-40°C ~ 85°C	Active
0034.7215	SCHURTER Inc.	MSTU 250	1	250	—	50A	6.85	Slow Blow	-40°C ~ 85°C	Active
38511000440	Littelfuse Inc.	TE5® 385	1	125	—	50A	4.5	Slow Blow	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Primary Recommendation: Part 0034.6615 (SCHURTER MST 250) is the direct equivalent replacement. It maintains the original 1 A, 250 V AC specification with identical breaking capacity (35A AC) and melting I²t (12). This part offers extended operational temperature range (-55°C ~ 125°C) and active product status with comprehensive approval certifications (CCC, cURus, KC, PSE/JET, VDE).

Alternative Selections: Parts 0034.6915, 0034.6945, 0034.7115, and 0034.7215 are parametric equivalents suitable for applications where increased breaking capacity or modified melting I²t characteristics are acceptable. All SCHURTER alternatives maintain identical current and voltage ratings with active product status and ROHS3 compliance.

Limited Compatibility: Part 38511000440 (Littelfuse TE5® 385) is suitable only for circuits with maximum 125 VAC operation. This part is not recommended for 250 VAC applications.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.6615 directly replace the obsolete 2040.0615?

A: Yes. Both parts share identical current rating (1 A), AC voltage rating (250 V), response time (slow blow), and physical dimensions (0.335" Dia x 0.335" H). The 0034.6615 maintains the same breaking capacity (35A AC) and melting I²t (12), with added DC voltage capability and extended temperature range.

Q: What is the difference between the MXT 250 series (0034.6915, 0034.6945) and the original MSU 250?

A: The MXT 250 series provides increased breaking capacity (100A versus 35A) and reduced melting I²t (4.4 versus 12). These parts are electrically compatible for 1 A, 250 V AC applications but exhibit faster response characteristics due to lower melting I²t values.

Q: Are the MSTU 250 series parts (0034.7115, 0034.7215) interchangeable with the original 2040.0615?

A: Yes, for mounting and electrical compatibility. Both maintain 1 A, 250 V AC ratings and identical physical dimensions. The MSTU 250 series offers intermediate breaking capacity (50A) and melting I²t (6.85) between the original MSU 250 and the MXT 250 series.

Q: Why is the Littelfuse 38511000440 listed as a similar part rather than a direct substitute?

A: The Littelfuse part operates at 125 VAC maximum, not 250 VAC. It is suitable only for applications with lower voltage requirements. Use this part only when circuit voltage does not exceed 125 VAC.

Q: What certifications should I verify for my application?

A: The original 2040.0615 carries CCC, cURus, and VDE approvals. The recommended replacement 0034.6615 includes additional certifications (KC, PSE/JET). Verify that the selected substitute meets all required regulatory approvals for your specific application and region.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the original 2040.0615.

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