SCHURTER 2040.0720 Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The SCHURTER 2040.0720 is a 3.15 A, 250 V AC board mount fuse with radial, can, vertical package configuration. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for through-hole radial fuse applications. Substitute parts must preserve the core electrical ratings and mechanical form factor while offering continued availability and support.

Substiute Parts

2040.0720

SCHURTER Inc.In Stock: 11052040.0720 Datasheet

Current PartRFQ

0034.6720

SCHURTER Inc.In Stock: 16840034.6720 Datasheet

DirectRFQ

0034.6920

SCHURTER Inc.In Stock: 23980034.6920 Datasheet

Parametric EquivalentRFQ

0034.6950

SCHURTER Inc.In Stock: 10380034.6950 Datasheet

Parametric EquivalentRFQ

0034.7220

SCHURTER Inc.In Stock: 11420034.7220 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following parameters: current rating (3.15 A), AC voltage rating (250 V), fuse type (board mount, through hole), package configuration (radial, can, vertical), physical dimensions (0.335" Dia x 0.335" H), and response time (slow blow). All identified substitutes maintain these core specifications. Variations in DC voltage rating, breaking capacity, melting I²t, series designation, and approval agency certifications do not preclude substitution when AC ratings and mechanical compatibility are preserved.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts (0034.6720, 0034.6920, 0034.6950, 0034.7220) are active products manufactured by SCHURTER Inc. and maintain full compatibility with the obsolete 2040.0720 across all critical electrical and mechanical parameters.

Part 0034.6720 offers the closest electrical match, including identical melting I²t (76) and breaking capacity (35A AC), with the addition of 125 V DC rating and extended operating temperature range (-55°C ~ 125°C). This part carries expanded approval certifications (CCC, cURus, KC, PSE/JET, VDE).

Parts 0034.6920 and 0034.6950 are functionally identical alternatives from the MXT 250 series, both featuring increased breaking capacity (100A) and reduced melting I²t (57). These parts support the same operating temperature range as the main part and carry comprehensive international certifications.

Part 0034.7220 from the MSTU 250 series provides a substitute option with 50A breaking capacity and 55 melting I²t, supported by cULus certification and matching the main part's operating temperature range.

Selection should be based on application-specific requirements for breaking capacity, DC voltage rating, and required approval certifications.

Frequently Asked Questions (FAQ)

Q: Can 0034.6720 be used as a direct replacement for 2040.0720?

A: Yes. Both parts share identical current rating (3.15 A), AC voltage rating (250 V), response time (slow blow), mounting type (through hole), and physical dimensions (0.335" Dia x 0.335" H). The 0034.6720 is an active product with expanded certifications and extended operating temperature range.

Q: What is the difference between the MXT 250 series substitutes (0034.6920, 0034.6950) and the main part?

A: The MXT 250 series maintains all critical electrical and mechanical compatibility parameters. The primary differences are increased breaking capacity (100A versus 35A) and reduced melting I²t (57 versus 76). These characteristics do not affect substitution eligibility for applications requiring the specified 3.15 A, 250 V AC rating.

Q: Are there DC voltage considerations for substitution?

A: The main part 2040.0720 does not specify a DC voltage rating. Substitute 0034.6720 includes a 125 V DC rating, which provides additional capability without affecting AC operation. Other substitutes do not specify DC ratings. DC voltage rating is not a limiting factor for AC-only applications.

Q: Do all substitutes meet the same approval certifications?

A: No. The main part carries CCC, cURus, and VDE certifications. Substitute 0034.6720 adds KC and PSE/JET certifications. Substitutes 0034.6920 and 0034.6950 carry the same expanded set (CCC, cURus, KC, PSE/JET, VDE). Substitute 0034.7220 carries cULus certification. Application requirements should determine which certifications are necessary.

Q: Can parts from different series (MSU, MST, MXT, MSTU) be intermixed in the same circuit?

A: Yes, provided the application requirements are met by the specific electrical and mechanical parameters of each part. All identified substitutes maintain the core specifications necessary for functional compatibility in 3.15 A, 250 V AC through-hole radial fuse applications.

Q: What is the significance of the different melting I²t values?

A: Melting I²t (76, 57, 55) represents the thermal energy required to melt the fuse element. Lower values indicate faster thermal response. These differences do not preclude substitution when the current rating and voltage rating remain constant. Application thermal characteristics should determine whether melting I²t variation is acceptable.