5VT 1.6-R Equivalent & Substitute Parts

Part Overview

The 5VT 1.6-R is a 1.6 A, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm package format. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain electrical compatibility across current rating, voltage rating, response time characteristics, and mechanical package dimensions to ensure proper circuit protection functionality.

Key Parameters

Parameter	5VT 1.6-R
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Slow Blow
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35 A
Operating Temperature Range	-55°C ~ 125°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 5VT 1.6-R are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Current Rating: 1.6 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (preferred for functional equivalence)
Mounting Type: Requires Holder (exact match required)

Direct Equivalents (Full Parameter Match): Parts meeting all critical parameters with slow blow response time and identical breaking capacity are classified as direct equivalents. These include 021301.6MXP, 021801.6MXP, and 021901.6MXAP from Littelfuse Inc.

Functional Equivalents (Parameter Variance): Parts meeting all critical electrical and mechanical parameters but with variations in secondary characteristics such as melting I²t, breaking capacity, or response time classification are classified as functional equivalents. These include BK1/GMC-1.6-R (medium blow response) and GDC-1.6A (different melting I²t and breaking capacity).

Similar Classification (Incomplete Data): Part 0034.3119.G from SCHURTER Inc. is classified as similar due to insufficient detailed specification data in the provided input.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Product Status
5VT 1.6-R	Bel Fuse Inc.	1.6	250	Slow Blow	5mm x 20mm	35	62	0.059	Obsolete
021301.6MXP	Littelfuse Inc.	1.6	250	Slow Blow	5mm x 20mm	35	44.2	0.0551	Active
021801.6MXBP	Littelfuse Inc.	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	Active
021801.6MXP	Littelfuse Inc.	1.6	250	Slow Blow	5mm x 20mm	35	23.35	0.0336	Active
021901.6MXAP	Littelfuse Inc.	1.6	250	Slow Blow	5mm x 20mm	150	44.2	0.0551	Active
BK1/GMC-1.6-R	Eaton - Electronics Division	1.6	250	Medium Blow	5mm x 20mm	100	5.8	0.067	Active
GDC-1.6A	Eaton - Electronics Division	1.6	250	Slow Blow	5mm x 20mm	35	21.7	0.0425	Active
0034.3119.G	SCHURTER Inc.	-	-	-	-	-	-	-	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Slow Blow Response):

021301.6MXP, 021801.6MXP, and 021901.6MXAP from Littelfuse Inc. are recommended as primary substitutes. All three maintain active product status, matching current rating, voltage rating, package dimensions, and slow blow response time. These parts carry comprehensive international certifications including CCC, CE, CSA, and VDE. Melting I²t values vary (44.2 and 23.35), reflecting different thermal response profiles within the slow blow classification. Breaking capacity for 021901.6MXAP is elevated to 150 A, providing enhanced fault current handling capability.

Secondary Substitutes (Active Status, Response Time Variance):

BK1/GMC-1.6-R from Eaton - Electronics Division maintains active status and identical electrical ratings but operates with medium blow response time rather than slow blow. This part exhibits significantly lower melting I²t (5.8) and higher breaking capacity (100 A). Selection of this substitute requires confirmation that medium blow response time is functionally acceptable for the target application.

GDC-1.6A from Eaton - Electronics Division maintains active status, slow blow response time, and matching electrical ratings. Melting I²t is 21.7, and breaking capacity is 35 A. Certification coverage includes cURus, IMQ, and MITI/JET.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory posture. Certification agency coverage varies across substitute options; applications requiring specific regional certifications (such as K-MARK, PSE, or UL) should reference the detailed certification lists provided in the parameter comparison table.

Frequently Asked Questions (FAQ)

Q: Can 021901.6MXAP be used as a direct replacement for 5VT 1.6-R?

A: Yes. 021901.6MXAP maintains identical current rating (1.6 A), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (slow blow), and mounting type (requires holder). The elevated breaking capacity (150 A versus 35 A) provides enhanced fault current protection without compromising circuit protection function.

Q: What is the difference between slow blow and medium blow response time?

A: Response time classification indicates the thermal response profile of the fuse element. Slow blow fuses tolerate temporary current surges before melting, suitable for circuits with inrush current characteristics. Medium blow fuses respond more rapidly to overcurrent conditions. Selection between these classifications depends on the specific circuit's inrush current profile and protection requirements.

Q: Are all substitute parts compatible with the original 5VT 1.6-R fuse holder?

A: All substitute parts maintain the 5mm x 20mm package dimension and require holder mounting type, ensuring mechanical compatibility with standard 5mm x 20mm fuse holders. Physical installation compatibility is confirmed; however, electrical performance characteristics may vary based on response time and melting I²t specifications.

Q: Which substitute part has the lowest melting I²t value?

A: 021801.6MXBP and 021801.6MXP both have melting I²t values of 23.35, the lowest among slow blow substitutes. Lower melting I²t indicates faster thermal response to overcurrent conditions. Selection should be based on circuit protection requirements rather than melting I²t value alone.

Q: What certifications are common across all substitute parts?

A: CCC, CE, CSA, SEMKO, and VDE certifications appear across multiple substitute options. Specific certification requirements for your application should be verified against the detailed certification lists provided in the parameter comparison section.

Q: Is 0034.3119.G from SCHURTER Inc. a viable substitute?

A: Insufficient detailed specification data is provided for 0034.3119.G to confirm full parameter equivalence. Direct contact with SCHURTER Inc. or the component distributor is required to obtain complete electrical and mechanical specifications before selection.

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