SCHURTER 0034.4242 Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.4242 is a 200 mA board mount fuse rated for 125 V AC/DC operation with fast blow response characteristics. This through-hole radial can-style fuse is designed for circuit protection in electronic equipment requiring reliable overcurrent interruption. The part maintains active product status with 857 units in current inventory. Substitute parts are identified to address application requirements including extended temperature ranges, higher breaking capacity ratings, or alternative mechanical packaging configurations while maintaining core electrical specifications.

Substiute Parts

0034.4242

SCHURTER Inc.In Stock: 9100034.4242 Datasheet

Current PartRFQ

0272.200V

Littelfuse Inc.In Stock: 7000272.200V Datasheet

SimilarRFQ

0273.200V

Littelfuse Inc.In Stock: 16130273.200V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.4242 are qualified based on matching the following critical electrical and mechanical parameters:

• Current Rating: 200 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Style: Radial, Can configuration (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded)

The identified substitutes are Littelfuse MICRO™ 272 (0272.200V) and Littelfuse MICRO™ 273 (0273.200V). Both parts satisfy all core electrical specifications and mounting requirements. Differences exist in breaking capacity ratings, melting I²t values, physical dimensions, and maximum operating temperature ranges, which may influence selection based on specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

Selection between the SCHURTER 0034.4242 and its Littelfuse substitutes depends on application-specific requirements:

The SCHURTER 0034.4242 is suitable for applications operating within the -25°C to 85°C temperature range with a 100 A breaking capacity requirement and cURus certification compliance.

The Littelfuse 0272.200V offers extended low-temperature operation to -55°C and high-temperature capability to 125°C, with 10 kA breaking capacity and CSA, QPL, UL certifications. Physical dimensions are smaller (5.97mm diameter x 7.30mm height).

The Littelfuse 0273.200V provides 10 kA breaking capacity with CSA, QPL, UL certifications and operates from -55°C to 85°C. Physical dimensions closely match the original part (6.35mm diameter x 8.89mm height), offering minimal PCB layout modification requirements.

All three parts maintain ROHS3 compliance and active product status. Selection should account for thermal environment constraints, breaking capacity specifications, certification requirements, and physical space limitations on the target circuit board.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0272.200V or 0273.200V be used as direct replacements for the SCHURTER 0034.4242?

A: Both Littelfuse parts match the core electrical specifications (200 mA, 125 V AC/DC, fast blow response, through-hole radial can package). However, physical dimensions differ. The 0272.200V is smaller (5.97mm x 7.30mm), while the 0273.200V is slightly larger (6.35mm x 8.89mm) compared to the original (6.40mm x 8.80mm). PCB layout compatibility must be verified before substitution.

Q: What is the significance of the breaking capacity difference between 100 A and 10 kA?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt without rupturing or creating a hazard. The SCHURTER part is rated for 100 A breaking capacity, while both Littelfuse substitutes are rated for 10 kA. Selection depends on the maximum prospective short-circuit current in the application. Higher breaking capacity provides greater safety margin in high-fault-current environments.

Q: Are there temperature range limitations when substituting parts?

A: The SCHURTER 0034.4242 operates from -25°C to 85°C. The Littelfuse 0272.200V extends to -55°C to 125°C, offering broader temperature coverage. The Littelfuse 0273.200V operates from -55°C to 85°C. Applications requiring operation below -25°C or above 85°C should use the 0272.200V. Applications within the -25°C to 85°C range are compatible with all three parts.

Q: Do certification differences affect substitution eligibility?

A: The SCHURTER part carries cURus certification. Both Littelfuse substitutes carry CSA, QPL, and UL certifications. Certification requirements depend on the end-application regulatory framework. Equipment requiring specific certification marks must use parts meeting those certification standards.

Q: What is the impact of melting I²t value differences?

A: Melting I²t (0.0033 for SCHURTER versus 0.00409 for both Littelfuse parts) describes the thermal energy required to melt the fuse element. Slightly higher values in the Littelfuse parts indicate marginally different thermal response characteristics. Both values are within the same order of magnitude and maintain the fast-blow response classification.

Q: How do physical dimension differences affect board layout?

A: The SCHURTER 0034.4242 measures 6.40mm diameter x 8.80mm height. The Littelfuse 0273.200V (6.35mm x 8.89mm) is nearly identical and typically requires no layout modification. The Littelfuse 0272.200V (5.97mm x 7.30mm) is noticeably smaller and may allow for tighter component spacing but requires PCB footprint verification.