5TT 200-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5TT 200-R is a 200 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm package format. This fuse is designed for circuit protection in applications requiring holder-mounted cartridge fuses with slow-blow response characteristics. The part maintains Active product status with 1583 units in current inventory.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from multiple qualified manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 5TT 200-R is determined by strict equivalence across the following critical parameters:

Current Rating: 200 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 (exact match required)
Mounting Type: Requires Holder (exact match required)
Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

All substitute parts listed below meet these mandatory electrical and mechanical parameters. Variations in secondary characteristics such as breaking capacity, melting I²t, DC cold resistance, and approval agency certifications do not disqualify parts from substitution eligibility when primary parameters align.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Approval Agencies
5TT 200-R	Bel Fuse Inc.	5TT	200 mA	250 V	Slow Blow	5mm x 20mm	100 A	0.476	4.98	CE, CSA, cULus
5ST 200-R	Bel Fuse Inc.	5ST	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.15	2.9	CCC, CE, CSA, cURus, IMQ, SEMKO, VDE
0239.200MXP	Littelfuse Inc.	239	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.165	3.8725	CE, CSA, KC, UL
0034.3110	SCHURTER Inc.	FST 5x20	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.256	Not specified	CCC, cURus, VDE
0034.5610.11	SCHURTER Inc.	SMD-FST	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.256	Not specified	cURus, VDE
0218.200HXP	Littelfuse Inc.	218	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.341	1.6	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE
0218.200MXP	Littelfuse Inc.	218	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.341	1.6	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE
0219.200MXAP	Littelfuse Inc.	219XA	200 mA	250 V	Slow Blow	5mm x 20mm	150 A	0.32	1.6	CCC, CE, CSA, SEMKO, UL, VDE
0239.200HXP	Littelfuse Inc.	239	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.165	3.8725	CE, CSA, KC, UL
BK/GMD-200-R	Eaton - Electronics Division	GMD	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.2	5.19	CSA, UL
BK/S506-200-R	Eaton - Electronics Division	S506	200 mA	250 V	Slow Blow	5mm x 20mm	35 A	0.114	1	BSI, CCC, CSA, IMQ, SEMKO, UR, VDE

Engineering Selection Recommendations

All listed substitute parts satisfy the mandatory electrical and mechanical parameters required for direct substitution with the 5TT 200-R. Selection among qualified alternatives should be based on the following factors:

Certification Coverage: The 5TT 200-R carries CE, CSA, and cULus approvals. Parts with broader certification portfolios (such as 0218.200HXP, 0218.200MXP, and BK/S506-200-R) provide expanded compliance coverage across additional regulatory jurisdictions including CCC, K-MARK, SEMKO, and VDE standards.

Inventory Availability: The 5ST 200-R (Bel Fuse Inc.) offers the highest current inventory at 2904 units, followed by 0218.200MXP (Littelfuse Inc.) at 3993 units. These options provide supply chain continuity when primary sourcing is constrained.

Manufacturer Qualification: Bel Fuse Inc., Littelfuse Inc., SCHURTER Inc., and Eaton Electronics Division are all established manufacturers with Active product status across their respective part lines, ensuring ongoing technical support and supply reliability.

Breaking Capacity Considerations: The 5TT 200-R specifies 100 A breaking capacity at rated voltage, which exceeds most substitute options at 35 A. The 0219.200MXAP variant offers 150 A breaking capacity for applications requiring enhanced fault current handling. Applications with specific breaking capacity requirements should verify compatibility with the selected substitute.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 5TT 200-R with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts meet the mandatory electrical and mechanical parameters: 200 mA current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm package, and holder-mount configuration. Direct substitution is permissible from an electrical standpoint. However, verify that your application does not have specific requirements for breaking capacity or DC cold resistance that would necessitate evaluation of secondary parameters.

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

A: Both are Bel Fuse Inc. products with identical primary electrical specifications (200 mA, 250 V, slow-blow, 5x20mm). The 5TT series specifies 100 A breaking capacity and 0.476 melting I²t, while the 5ST series specifies 35 A breaking capacity and 0.15 melting I²t. The 5ST 200-R carries broader international certifications (CCC, IMQ, SEMKO, VDE) compared to the 5TT 200-R.

Q: Are there differences in physical dimensions between substitute parts?

A: All parts conform to the 5mm x 20mm package standard. Dimensional specifications list 0.201" to 0.205" diameter and 0.787" length across all variants, representing standard manufacturing tolerances within the cartridge fuse specification. Physical interchangeability in standard fuse holders is assured.

Q: Which substitute offers the best compliance coverage?

A: The 0218.200HXP, 0218.200MXP, and BK/S506-200-R parts carry the most comprehensive approval agency certifications. The 0218.200HXP and 0218.200MXP include CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE approvals. The BK/S506-200-R includes BSI, CCC, CSA, IMQ, SEMKO, UR, and VDE approvals. Selection depends on your specific regulatory jurisdiction requirements.

Q: What does "slow-blow" response mean in the context of these fuses?

A: Slow-blow (also termed time-delay) fuses tolerate temporary inrush currents without opening, responding only to sustained overcurrent conditions. All listed parts share this characteristic, making them suitable for circuits with inductive loads or startup transients that would cause fast-acting fuses to nuisance-trip.

Q: Can I use a substitute with different DC cold resistance?

A: DC cold resistance variations (ranging from 1 Ohm to 5.19 Ohms across the listed parts) reflect manufacturing differences but do not affect fuse function in AC-rated applications. For DC applications or circuits sensitive to voltage drop across the fuse element, verify that the selected substitute's DC cold resistance is acceptable for your specific circuit design.

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