5TT 200 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5TT 200 is a 200 mA, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm package with slow-blow response characteristics. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a compatible holder for installation and is designed for general-purpose circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Slow Blow
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution eligibility for the 5TT 200 is determined by the following critical parameters: current rating (200 mA), voltage rating (250 V AC), fuse type (cartridge glass), and physical package dimensions (5mm x 20mm). All substitute parts must match these core electrical and mechanical specifications to ensure functional compatibility within the same circuit protection application.

The substitute parts are grouped as follows:

Direct Manufacturer Equivalent: 5TT 200-R (Bel Fuse Inc.) — identical electrical specifications with active product status and improved RoHS compliance.

Parametric Equivalent: 5ST 200-R (Bel Fuse Inc.) — matches all critical electrical parameters and physical dimensions; differs in breaking capacity and melting I²t characteristics.

Similar Equivalent: 0218.200MXBP (Littelfuse Inc.) — matches all critical electrical parameters and physical dimensions; minor dimensional tolerance variation (5.20mm diameter vs. 5.10mm) and different melting I²t value.

Parameter Comparison

Parameter	5TT 200	5TT 200-R	5ST 200-R	0218.200MXBP
Manufacturer	Bel Fuse Inc.	Bel Fuse Inc.	Bel Fuse Inc.	Littelfuse Inc.
Current Rating (Amps)	200 mA	200 mA	200 mA	200 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Breaking Capacity @ Rated Voltage	100 A	100 A	35 A	35 A
Melting I²t	0.48	0.476	0.15	0.341
DC Cold Resistance (Ohms)	4.7	4.98	2.9	1.6
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CE, CSA, UL	CE, CSA, cULus	CCC, CE, CSA, cURus, IMQ, SEMKO, VDE	CCC, CE, CSA, KC, SEMKO, UL, VDE

Engineering Selection Recommendations

5TT 200-R is the primary direct equivalent. It maintains identical electrical specifications and physical dimensions as the 5TT 200 while offering active product status and ROHS3 compliance. This part is recommended for direct replacement in existing designs.

5ST 200-R is a parametric equivalent suitable for applications where breaking capacity of 35 A is acceptable. This part provides the broadest regulatory approval coverage, including CCC, IMQ, and SEMKO certifications, and is recommended for designs requiring enhanced international compliance.

0218.200MXBP (Littelfuse Inc.) is a similar equivalent with matching electrical specifications. The minor dimensional tolerance variation (5.20mm diameter) must be verified for mechanical fit within the fuse holder. This part offers the lowest DC cold resistance (1.6 Ohms) and is recommended where holder compatibility is confirmed.

All substitute parts are ROHS3 compliant and suitable for new designs. Selection should prioritize product availability, holder compatibility, and required regulatory certifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 5TT 200-R directly replace the obsolete 5TT 200?

A: Yes. The 5TT 200-R is a direct manufacturer equivalent with identical current rating (200 mA), voltage rating (250 V AC), fuse type (cartridge glass), and package dimensions (5mm x 20mm). It is compatible with any holder designed for the 5TT 200.

Q: What is the difference between the 5TT 200-R and 5ST 200-R?

A: Both parts share identical electrical ratings (200 mA, 250 V AC) and physical dimensions. The 5ST 200-R has a lower breaking capacity (35 A vs. 100 A) and lower melting I²t (0.15 vs. 0.476). The 5ST 200-R offers broader international certifications including CCC and IMQ. Selection depends on breaking capacity requirements and target market certifications.

Q: Is the 0218.200MXBP from Littelfuse mechanically compatible?

A: The 0218.200MXBP matches all electrical specifications and has a 5mm x 20mm package designation. However, the diameter tolerance is 5.20mm compared to 5.10mm for the Bel Fuse parts. Mechanical fit within the specific fuse holder must be verified before deployment.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 5TT 200-R, 5ST 200-R, and 0218.200MXBP are all ROHS3 compliant. The original 5TT 200 is RoHS non-compliant and should be replaced with one of these alternatives in new designs.

Q: Which substitute part has the best regulatory approval coverage?

A: The 5ST 200-R carries the broadest approval agency list: CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE. This part is recommended for applications requiring multi-region compliance.

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