SCHURTER 2040.0618 Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The SCHURTER 2040.0618 is a 2 A, 250 V AC board mount fuse with radial, can, vertical package configuration. This part is classified as obsolete. Equivalent and substitute parts from the SCHURTER product line provide active alternatives with compatible electrical and mechanical specifications for direct board-level replacement applications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating - AC	250 V
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical
Mounting Type	Through Hole
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 matching the following critical parameters across all candidates:

Current Rating: 2 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Board Mount (Cartridge Style Excluded)
Package / Case: Radial, Can, Vertical (exact match required)
Mounting Type: Through Hole (exact match required)
Response Time: Slow Blow (exact match required)
Physical Dimensions: 0.335" Dia x 0.335" H (8.50mm x 8.50mm) (exact match required)

All four substitute parts meet these core criteria. Variations in breaking capacity, melting I²t, operating temperature range, and approval agencies are secondary parameters that do not prevent substitution but may influence selection based on application requirements.

Parameter Comparison

Parameter	2040.0618 (Main)	0034.6618	0034.6918	0034.7118	0034.7218
Manufacturer	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.
Current Rating (Amps)	2 A	2 A	2 A	2 A	2 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	Not specified	Not specified	Not specified
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical	Radial, Can, Vertical
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
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)	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	35 A	35 A AC, 50 A DC	100 A	50 A	50 A
Melting I²t	34	34	16	28.6	28.6
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All four substitute parts are active products with current manufacturing status, providing supply continuity for the obsolete 2040.0618.

0034.6618 offers extended operating temperature range (-55°C ~ 125°C) and dual voltage rating (250 V AC, 125 V DC). Approval agencies include CCC, cURus, KC, PSE/JET, and VDE. This part is suitable for applications requiring DC voltage capability or extended temperature performance.

0034.6918 provides the highest breaking capacity (100 A) with reduced melting I²t (16). Approval agencies include CCC, cURus, KC, PSE/JET, and VDE. This part is suitable for applications requiring enhanced fault protection.

0034.7118 and 0034.7218 both feature 50 A breaking capacity and 28.6 melting I²t. Approval agency is cULus. These parts are suitable for standard AC applications with moderate fault protection requirements.

All substitute parts maintain identical current rating, AC voltage rating, package configuration, and physical dimensions as the main part. Selection should be based on application-specific requirements for breaking capacity, temperature range, DC voltage capability, and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can 0034.6618 be used in place of 2040.0618 in all applications?

A: 0034.6618 is electrically compatible as a direct substitute. It maintains the same 2 A current rating, 250 V AC voltage rating, and physical package. The addition of 125 V DC rating and extended temperature range (-55°C ~ 125°C) make it suitable for a broader range of applications. Verify that the application does not require the specific approval agencies listed for the original part.

Q: What is the difference between 0034.6918 and 0034.7118?

A: Both parts share identical electrical ratings (2 A, 250 V AC) and physical dimensions. The primary differences are breaking capacity (0034.6918: 100 A versus 0034.7118: 50 A) and melting I²t (0034.6918: 16 versus 0034.7118: 28.6). 0034.6918 provides higher fault protection capability. Approval agencies also differ: 0034.6918 includes KC and PSE/JET certifications, while 0034.7118 is cULus certified.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all four substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the main part.

Q: What does "Slow Blow" response time mean?

A: Slow Blow indicates the fuse has a delayed response to overcurrent conditions, allowing brief current surges to pass without interruption. All parts in this comparison group share this characteristic, ensuring consistent circuit protection behavior.

Q: Can I use 0034.6618 in a DC circuit?

A: 0034.6618 is rated for 125 V DC operation, making it suitable for DC applications within this voltage limit. The main part (2040.0618) and other substitutes do not specify DC voltage ratings and should not be assumed for DC use.

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