5STP 800 Equivalent & Substitute Parts

Part Overview

The 5STP 800 is an 800 mA, 250 V AC/DC slow-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and thermal characteristics to ensure direct functional replacement without circuit redesign.

Substiute Parts

5STP 800

Bel Fuse Inc.In Stock: 11005STP 800 Datasheet

Current PartRFQ

5STP 800-R

Bel Fuse Inc.In Stock: 22655STP 800-R Datasheet

DirectRFQ

0218.800MXEP

Littelfuse Inc.In Stock: 7370218.800MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5STP 800 is determined by strict equivalence across the following parameters:

• Current Rating: 800 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 35 A (exact match required)

Two substitute parts meet these criteria: the 5STP 800-R (Bel Fuse Inc., active status) and the 0218.800MXEP (Littelfuse Inc., active status). Both maintain identical electrical and mechanical specifications, enabling direct replacement in existing applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete 5STP 800, the 5STP 800-R is the primary substitute. This part is manufactured by the same supplier (Bel Fuse Inc.), maintains identical electrical and mechanical specifications, and carries active product status with ROHS3 compliance. The 5STP 800-R is available in bulk packaging with higher inventory levels (2155 pcs in stock).

The 0218.800MXEP (Littelfuse Inc., Series 218) is a secondary equivalent option. While it maintains all critical electrical ratings and mechanical form factor, it exhibits minor dimensional variations (0.228" Dia x 0.886" L versus 0.217" Dia x 0.827" L) and different melting I²t characteristics (3.37 versus 1.6). Both substitute parts carry expanded regulatory approvals including CCC and K-MARK certifications, and both are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the 5STP 800-R be used as a direct replacement for the 5STP 800?

A: Yes. The 5STP 800-R maintains identical current rating (800 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), package dimensions (5mm x 20mm axial), and breaking capacity (35 A). The primary advantage is active product status and ROHS3 compliance.

Q: What are the differences between the 5STP 800-R and 0218.800MXEP?

A: Both parts share identical electrical ratings and primary mechanical specifications. Differences include: manufacturer (Bel Fuse Inc. versus Littelfuse Inc.), melting I²t (1.6 versus 3.37), DC cold resistance (0.15 Ohms versus 0.0813 Ohms), and minor physical dimensions (5.50mm x 21.00mm versus 5.80mm x 22.50mm). These dimensional variations remain within the 5mm x 20mm axial classification.

Q: Are there RoHS compliance considerations for substitution?

A: The original 5STP 800 is RoHS non-compliant. Both substitute parts (5STP 800-R and 0218.800MXEP) are ROHS3 compliant, making them suitable for applications with RoHS requirements.

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

A: No. The 5STP 800 carries CE, CSA, IMQ, SEMKO, UL, and VDE approvals. The 5STP 800-R adds CCC and cURus certifications. The 0218.800MXEP includes CCC, K-MARK, and UL certifications. Verify that required approvals for your application are present in the selected substitute.

Q: What is the significance of melting I²t differences?

A: Melting I²t (1.6 for 5STP 800 and 5STP 800-R; 3.37 for 0218.800MXEP) indicates thermal energy absorption capacity. The 0218.800MXEP exhibits higher I²t, reflecting different internal construction. Both parts maintain the same current rating and response time classification, ensuring functional equivalence in standard circuit protection applications.