5HTP 2-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 5HTP 2-R is a 2A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. This slow-blow fuse is actively produced and widely stocked. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	5mm x 20mm (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	1.5 kA
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Current Rating: Must be 2 A
Voltage Rating (AC): Must be 250 V minimum
Fuse Type: Must be Cartridge, Ceramic
Response Time: Must be Slow Blow
Package / Case: Must be 5mm x 20mm (Axial)
Mounting Type: Must be Through Hole
Breaking Capacity: Must be 1.5 kA at rated voltage
Operating Temperature Range: Must support -55°C ~ 125°C
RoHS Compliance: Must be ROHS3 Compliant

All identified substitute parts meet these criteria and are therefore direct functional equivalents for the 5HTP 2-R in applications requiring 2A 250VAC ceramic fuse protection.

Parameter Comparison

Parameter	5HTP 2-R (Bel Fuse)	0001.2507.PT (SCHURTER)	0215002.MRET1P (Littelfuse)	0215002.MXEP (Littelfuse)
Current Rating (Amps)	2 A	2 A	2 A	2 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	300 V	Not specified	Not specified
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	5mm x 20mm (Axial)	5mm x 20mm (Axial)	5mm x 20mm (Axial)	5mm x 20mm (Axial)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	1.5 kA	1.5 kA	1.5 kA	1.5 kA
Melting I²t	9.7	9.2	11.68	11.68
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Size / Dimension	0.217" Dia x 0.827" L (5.50mm x 21.00mm)	0.213" Dia x 0.886" L (5.40mm x 22.50mm)	0.228" Dia x 0.886" L (5.80mm x 22.50mm)	0.228" Dia x 0.886" L (5.80mm x 22.50mm)
DC Cold Resistance	0.07 Ohms	Not specified	0.0566 Ohms	0.0566 Ohms
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and meet the core electrical and mechanical specifications of the 5HTP 2-R. Selection among equivalents should be based on:

Availability and Lead Time: 0215002.MXEP (Littelfuse) offers the highest inventory level at 15,546 pieces, followed by 0001.2507.PT (SCHURTER) at 7,104 pieces.
Packaging Requirements: 0215002.MRET1P is supplied in Cut Tape (CT) packaging; 5HTP 2-R and 0215002.MXEP are supplied in Bulk; 0001.2507.PT is supplied in Bulk.
Certification Coverage: All parts carry multiple international approvals (CCC, CE, CSA, UL, VDE, PSE, SEMKO). 0001.2507.PT carries cURus certification; Littelfuse parts carry KC certification in addition to others.
Melting I²t Characteristics: Littelfuse parts (0215002.MRET1P and 0215002.MXEP) have higher I²t values (11.68) compared to 5HTP 2-R (9.7) and 0001.2507.PT (9.2), indicating slightly different thermal response profiles within the slow-blow category.

Frequently Asked Questions (FAQ)

Q: Can 0001.2507.PT be used as a direct replacement for 5HTP 2-R?

A: Yes. Both parts share identical current rating (2A), AC voltage rating (250V), fuse type (ceramic cartridge), response time (slow blow), package dimensions (5mm x 20mm), and breaking capacity (1.5kA). The 0001.2507.PT additionally specifies 300V DC rating, which does not restrict its use in AC applications.

Q: What is the difference between the Littelfuse 0215002.MRET1P and 0215002.MXEP?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: 0215002.MRET1P is supplied in Cut Tape (CT) format with 1,656 pieces in stock, while 0215002.MXEP is supplied in Bulk format with 15,546 pieces in stock. Selection depends on assembly process requirements and volume needs.

Q: Are there dimensional variations between substitute parts?

A: Minor dimensional variations exist within the 5mm x 20mm form factor specification. The 5HTP 2-R measures 5.50mm diameter x 21.00mm length, while SCHURTER 0001.2507.PT measures 5.40mm x 22.50mm, and Littelfuse parts measure 5.80mm x 22.50mm. These variations remain within the 5x20mm cartridge standard and do not affect mechanical interchangeability in standard fuse holders.

Q: Do all substitute parts have the same melting I²t value?

A: No. The 5HTP 2-R has an I²t of 9.7, 0001.2507.PT has 9.2, and both Littelfuse parts have 11.68. All parts are classified as slow-blow fuses and meet the 1.5kA breaking capacity requirement. The I²t variation reflects different thermal mass characteristics within the slow-blow category and does not prevent substitution in standard applications.

Q: Which substitute part has the best availability?

A: 0215002.MXEP (Littelfuse) has the highest inventory at 15,546 pieces in stock, making it the most readily available substitute for the 5HTP 2-R.

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