SCHURTER 0034.7103 Board Mount Fuse 63mA 250VAC Equivalent & Substitute Parts

Part Overview

The SCHURTER 0034.7103 is a board mount fuse rated for 63 mA at 250 V AC/DC with slow blow response characteristics. This radial, can-style through-hole component is designed for circuit protection in industrial and commercial applications. The part maintains active product status with full cULus approval and ROHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

0034.7103

SCHURTER Inc.In Stock: 10250034.7103 Datasheet

Current PartRFQ

0034.7203

SCHURTER Inc.In Stock: 10220034.7203 Datasheet

Parametric EquivalentRFQ

37400630410

LittelfuseIn Stock: 101637400630410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 0034.7103 are classified based on electrical and mechanical parameter alignment:

Parametric Equivalent (0034.7203): This SCHURTER part shares identical electrical specifications including 63 mA current rating, 250 V AC voltage rating, slow blow response, 50 A breaking capacity, and identical physical dimensions (0.335" Dia x 0.335" H). Both parts belong to the MSTU 250 series and carry equivalent cULus approval and ROHS3 compliance. This classification indicates direct functional interchangeability.

Similar Manufacturer Part (37400630410): The Littelfuse TR5® 374 series part matches the core electrical parameters: 63 mA current rating, 250 V AC voltage rating, slow blow response, 50 A breaking capacity, and operating temperature range (-40°C ~ 85°C). Physical dimensions show minor variation (0.335" Dia x 0.315" H versus 0.335" Dia x 0.335" H), representing a 0.5 mm height difference. Both parts feature radial, can-style through-hole mounting and ROHS3 compliance. Approval agencies include CSA and cULus certification. The melting I²t value differs (0.009 versus 0.0176), reflecting manufacturer-specific thermal characteristics within the same functional class.

Parameter Comparison

Engineering Selection Recommendations

SCHURTER 0034.7203: This part is recommended as the primary substitute for the SCHURTER 0034.7103. Identical electrical ratings, physical dimensions, series designation (MSTU 250), and certification profile (cULus, ROHS3) ensure direct replacement capability without design modification or re-qualification. Both parts maintain active product status with equivalent inventory availability.

Littelfuse 37400630410: This part qualifies as a functional substitute when cross-manufacturer sourcing is required. Electrical parameters (63 mA, 250 V, slow blow, 50 A breaking capacity) and operating temperature range align with the primary part. The 0.5 mm height reduction (8.00 mm versus 8.50 mm) falls within typical PCB layout tolerances for radial through-hole components. Enhanced certification scope (CSA addition to cULus) provides broader regulatory coverage. ROHS3 compliance and active product status confirm current manufacturing support. The melting I²t differential (0.009 versus 0.0176) reflects manufacturer-specific thermal design and does not affect functional compatibility within the specified electrical operating envelope.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 0034.7203 be used as a direct replacement for SCHURTER 0034.7103?

A: Yes. Both parts share identical current rating (63 mA), voltage rating (250 V AC), response time (slow blow), breaking capacity (50 A), physical dimensions (0.335" Dia x 0.335" H), operating temperature range (-40°C ~ 85°C), and approval certifications (cULus). No design changes or re-qualification are required.

Q: What is the primary difference between SCHURTER 0034.7103 and Littelfuse 37400630410?

A: The primary difference is manufacturer origin and physical height. Littelfuse 37400630410 measures 0.335" Dia x 0.315" H (8.50mm x 8.00mm) compared to SCHURTER's 0.335" Dia x 0.335" H (8.50mm x 8.50mm). All electrical parameters remain identical. Littelfuse provides additional CSA certification alongside cULus approval.

Q: Are there any PCB layout considerations when substituting Littelfuse 37400630410 for SCHURTER 0034.7103?

A: The 0.5 mm height reduction of the Littelfuse part is within standard PCB layout tolerances for radial through-hole components. No layout modifications are typically required. Verify component clearance in your specific application if space constraints exist.

Q: Do all three parts carry the same regulatory approvals?

A: SCHURTER 0034.7103 and 0034.7203 both carry cULus approval. Littelfuse 37400630410 carries both CSA and cULus approvals, providing broader regulatory coverage. All three parts are ROHS3 compliant.

Q: What is the significance of the melting I²t value difference between SCHURTER and Littelfuse parts?

A: Melting I²t represents manufacturer-specific thermal characteristics. SCHURTER 0034.7103 specifies 0.0176 while Littelfuse 37400630410 specifies 0.009. Both values are within acceptable ranges for 63 mA slow blow fuses and do not affect functional compatibility within the specified electrical operating envelope.

Q: Are all three parts currently in active production?

A: Yes. SCHURTER 0034.7103, SCHURTER 0034.7203, and Littelfuse 37400630410 all maintain active product status with current manufacturing support and inventory availability.