5STP 100-R Equivalent & Substitute Parts

Part Overview

The 5STP 100-R is a 100 mA, 250 V AC/DC slow-blow glass fuse cartridge manufactured by Bel Fuse Inc. in a 5mm x 20mm through-hole axial package. This component is classified as Active and maintains full RoHS3 compliance. Glass fuse cartridges of this specification are essential in circuit protection applications where controlled current interruption and thermal response characteristics are critical design parameters. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time classification, and approval agency certifications.

Substiute Parts

5STP 100-R

Bel Fuse Inc.In Stock: 17095STP 100-R Datasheet

Current PartRFQ

0034.3107.PT

SCHURTER Inc.In Stock: 40650034.3107.PT Datasheet

DirectRFQ

BK/S506-V-100-R

Eaton - Electronics DivisionIn Stock: 1036BK/S506-V-100-R Datasheet

DirectRFQ

0218.100MXEP

LittelfuseIn Stock: 17200218.100MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5STP 100-R are classified based on strict electrical and mechanical parameter matching:

Direct Substitutes share all critical electrical parameters: 100 mA current rating, 250 V AC voltage rating, slow-blow response time, 35 A breaking capacity, and 5mm x 20mm package dimensions. These parts are functionally equivalent for circuit protection applications.

Classification Criteria:

• Current Rating: 100 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Breaking Capacity: 35 A (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Through Hole (exact match required)

All identified substitute parts meet these criteria. Variations in melting I²t, DC cold resistance, physical dimensions within tolerance, and approval agency certifications do not disqualify substitution but may influence selection based on application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

All four parts—5STP 100-R, 0034.3107.PT, BK/S506-V-100-R, and 0218.100MXEP—are Active products with full RoHS3 compliance and are suitable for direct substitution based on electrical and mechanical parameters.

Approval Agency Considerations:

• 5STP 100-R: CCC, CE, CSA, cURus, IMQ, SEMKO, VDE
• 0034.3107.PT: cURus
• BK/S506-V-100-R: BSI, CCC, CSA, IMQ, SEMKO, UR, VDE
• 0218.100MXEP: CCC, CE, CSA, K-MARK, SEMKO, UL, VDE

Selection should prioritize parts with approval agencies matching the target application's regulatory requirements. BK/S506-V-100-R and 0218.100MXEP offer broader certification coverage. The 5STP 100-R and 0218.100MXEP both specify operating temperature ranges of -55°C to 125°C, which may be relevant for temperature-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can 0034.3107.PT replace 5STP 100-R in all applications? A: Yes, 0034.3107.PT meets all critical electrical and mechanical parameters: 100 mA current rating, 250 V AC voltage rating, slow-blow response, 35 A breaking capacity, and 5mm x 20mm package. However, verify that cURus certification satisfies your application's regulatory requirements, as it has narrower approval agency coverage than the original part.

Q: What is the significance of melting I²t variation among these parts? A: Melting I²t indicates the thermal energy required to melt the fuse element. The 5STP 100-R has a melting I²t of 0.03, while substitutes range from 0.045 to 0.107. These variations reflect different fuse element designs but do not affect substitution eligibility, as all parts maintain the same 100 mA current rating and slow-blow response classification. Application-specific thermal analysis may warrant consideration of these differences.

Q: Are there physical dimension differences that affect PCB layout? A: All parts conform to the 5mm x 20mm axial package specification. Physical dimensions vary slightly: 5STP 100-R is 0.217" Dia x 0.827" L, 0034.3107.PT is 0.213" Dia x 0.886" L, BK/S506-V-100-R is 0.218" Dia x 0.831" L, and 0218.100MXEP is 0.236" Dia x 0.886" L. These tolerances are within standard axial fuse cartridge specifications and do not require PCB redesign.

Q: Which part has the lowest DC cold resistance? A: BK/S506-V-100-R has the lowest DC cold resistance at 2.8 Ohms, compared to 8.905 Ohms for 0218.100MXEP and 10.3 Ohms for 5STP 100-R. Lower resistance may be advantageous in low-voltage, high-current sensing circuits, but all values are acceptable for standard circuit protection applications.

Q: Do all parts have the same approval certifications? A: No. 0034.3107.PT has the most limited certification (cURus only). The 5STP 100-R, BK/S506-V-100-R, and 0218.100MXEP have broader coverage. Confirm that the selected part's certifications align with your target market and regulatory standards.