5STP 630-R Equivalent & Substitute Parts

Part Overview

The 5STP 630-R is a 630 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm axial through-hole package, manufactured by Bel Fuse Inc. This component is classified as Active product status and is widely used in power distribution and circuit protection applications requiring reliable overcurrent protection with delayed response characteristics. Equivalent and substitute parts are identified when identical electrical ratings, mechanical dimensions, and approval certifications align with application requirements.

Substiute Parts

5STP 630-R

Bel Fuse Inc.In Stock: 19755STP 630-R Datasheet

Current PartRFQ

0034.3115.PT

SCHURTER Inc.In Stock: 18430034.3115.PT Datasheet

DirectRFQ

0218.630MXEP

Littelfuse Inc.In Stock: 19590218.630MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5STP 630-R are qualified based on the following critical parameters:

• Current Rating: 630 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package Dimensions: 5mm x 20mm axial cartridge (exact match required)
• Fuse Type: Glass cartridge (exact match required)
• Mounting Configuration: Through-hole (exact match required)
• Breaking Capacity: 35 A @ rated voltage (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)
• Regulatory Compliance: RoHS3 compliant (minimum requirement)

Two direct substitutes meet all electrical and mechanical criteria: 0034.3115.PT (SCHURTER Inc., FST 5x20 series) and 0218.630MXEP (Littelfuse Inc., 218 series). Both components share identical current, voltage, response time, package configuration, and temperature specifications. Dimensional variations within the 5mm x 20mm cartridge envelope and differences in melting I²t values do not preclude functional equivalence in standard circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All three components—5STP 630-R, 0034.3115.PT, and 0218.630MXEP—are Active product status and RoHS3 compliant. Selection among these parts should be based on:

Approval Agency Coverage: The 5STP 630-R and 0218.630MXEP offer broader regulatory certifications (CCC, CE, CSA, cULus/UL, IMQ/K-MARK, SEMKO, VDE). The 0034.3115.PT carries cURus certification. Applications requiring specific regional compliance (North America, Europe, China) should reference the required approval agencies for the target market.

Dimensional Fit: While all three components fit the 5mm x 20mm cartridge envelope, minor dimensional variations exist. The 5STP 630-R measures 5.50mm diameter x 21.00mm length; the 0034.3115.PT measures 5.40mm diameter x 22.50mm length; the 0218.630MXEP measures 5.80mm diameter x 22.50mm length. Verify mechanical clearance in the fuse holder or socket before substitution.

Melting I²t Characteristics: The 5STP 630-R has a melting I²t of 0.9, while 0034.3115.PT and 0218.630MXEP have higher values (4.35 and 4.675 respectively). This indicates the 5STP 630-R responds faster to thermal stress. For applications with tight thermal margins or specific I²t requirements, confirm compatibility with circuit design parameters.

Inventory Availability: All three parts are in stock (1937 pcs for 5STP 630-R, 1816 pcs for 0034.3115.PT, 1852 pcs for 0218.630MXEP).

Frequently Asked Questions (FAQ)

Q: Can 0034.3115.PT or 0218.630MXEP be used as direct replacements for 5STP 630-R?

A: Yes. Both parts share identical electrical ratings (630 mA, 250 V AC, slow-blow response), mechanical package (5mm x 20mm axial cartridge), and operating temperature range (-55°C ~ 125°C). All three are RoHS3 compliant and carry 35 A breaking capacity at rated voltage. Physical dimensions vary slightly within the cartridge envelope; confirm mechanical fit in your specific fuse holder.

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

A: Melting I²t defines the thermal energy required to melt the fuse element. The 5STP 630-R (0.9 I²t) melts faster than 0034.3115.PT (4.35 I²t) and 0218.630MXEP (4.675 I²t) under identical overcurrent conditions. Applications with specific thermal response requirements should confirm I²t compatibility with circuit protection design.

Q: Are there differences in approval certifications between these parts?

A: Yes. The 5STP 630-R and 0218.630MXEP carry broader certifications including CCC, CE, CSA, cULus/UL, IMQ/K-MARK, SEMKO, and VDE. The 0034.3115.PT carries cURus certification. Select the part whose certifications align with your target market and regulatory requirements.

Q: Do dimensional differences affect compatibility?

A: Minor dimensional variations exist within the 5mm x 20mm cartridge specification. The 5STP 630-R is 5.50mm diameter x 21.00mm length; 0034.3115.PT is 5.40mm diameter x 22.50mm length; 0218.630MXEP is 5.80mm diameter x 22.50mm length. Verify clearance in your fuse holder or socket before substitution, particularly if the holder has tight mechanical tolerances.

Q: Can these parts be used in both AC and DC circuits?

A: All three components are rated for 250 V AC/DC operation. The voltage rating applies to both AC and DC applications within the specified operating temperature range.