Littelfuse 1960040000 Equivalent & Substitute Parts

Part Overview

The Littelfuse 1960040000 is a 40 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm package format. This part is classified as obsolete, requiring identification of active equivalent alternatives for ongoing circuit protection applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure direct compatibility in existing fuse holder assemblies.

Key Parameters

Parameter	Value
Current Rating	40 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	150A
Melting I²t	0.011
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 1960040000 are grouped based on strict electrical and mechanical equivalence. All substitutes must match the following core parameters: 40 mA current rating, 250 V AC voltage rating, slow-blow response characteristic, 5mm x 20mm physical dimensions, and glass cartridge construction. Breaking capacity and melting I²t values are secondary selection criteria when multiple equivalents exist. Substitutes are categorized into two groups: Littelfuse Series 218 and 219XA variants (active status), and Eaton GDC and S506 series alternatives (active status). All listed substitutes are currently in production and carry appropriate regulatory certifications.

Parameter Comparison

Part Number	Manufacturer	Current Rating (mA)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	Product Status	RoHS Status
1960040000	Littelfuse	40	250	Slow Blow	5x20mm	150	0.011	Obsolete	ROHS3 Compliant
0218.040HXP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	35	0.00536	Active	ROHS3 Compliant
0218.040MXBP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	35	0.011	Active	ROHS3 Compliant
0218.040MXP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	35	0.00536	Active	ROHS3 Compliant
0218.040TXP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	35	0.011	Active	ROHS3 Compliant
0218.040VXP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	35	0.011	Active	ROHS3 Compliant
0219.040MXAP	Littelfuse Inc.	40	250	Slow Blow	5x20mm	150	0.011	Active	ROHS3 Compliant
BK/GDC-40MA	Eaton - Electronics Division	40	250	Slow Blow	5x20mm	35	0.0072	Active	RoHS Compliant
BK/S506-40-R	Eaton - Electronics Division	40	250	Slow Blow	5x20mm	35	0.0072	Active	ROHS3 Compliant
BK1/S506-40-R	Eaton - Electronics Division	40	250	Slow Blow	5x20mm	35	0.0072	Active	ROHS3 Compliant
GDC-40MA	Eaton - Electronics Division	40	250	Slow Blow	5x20mm	35	0.0072	Active	RoHS Compliant

Engineering Selection Recommendations

All listed substitute parts are active production items with current regulatory compliance. Selection between Littelfuse Series 218 and 219XA variants depends on breaking capacity requirements. The 0219.040MXAP maintains the original 150A breaking capacity and 0.011 melting I²t specification, providing direct functional equivalence to the 1960040000. Littelfuse Series 218 variants (0218.040HXP, 0218.040MXBP, 0218.040MXP, 0218.040TXP, 0218.040VXP) feature reduced breaking capacity at 35A and are suitable for applications where lower fault current interruption is acceptable. Eaton GDC and S506 series alternatives (BK/GDC-40MA, BK/S506-40-R, BK1/S506-40-R, GDC-40MA) provide equivalent electrical performance with 35A breaking capacity and alternative certification profiles. All substitutes maintain ROHS3 or equivalent RoHS compliance and are compatible with standard 5mm x 20mm fuse holders.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the 1960040000 without circuit modification?

A: Yes. All listed substitutes share identical current rating (40 mA), voltage rating (250 V AC), response time (slow-blow), and physical dimensions (5mm x 20mm). Direct mechanical and electrical compatibility is maintained in existing fuse holder assemblies.

Q: What is the significance of breaking capacity differences between the original part and substitutes?

A: The 1960040000 and 0219.040MXAP both specify 150A breaking capacity. Littelfuse Series 218 variants and Eaton alternatives specify 35A breaking capacity. Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Applications with fault currents exceeding 35A require the 150A-rated alternatives.

Q: Are there differences in melting I²t values among the substitutes?

A: Yes. The original 1960040000 specifies 0.011 melting I²t. Littelfuse Series 218 variants split between 0.00536 (0218.040HXP, 0218.040MXP) and 0.011 (0218.040MXBP, 0218.040TXP, 0218.040VXP). Eaton alternatives specify 0.0072. Melting I²t affects thermal response characteristics; applications with specific thermal protection requirements should match this parameter.

Q: Which substitute offers the closest functional match to the obsolete 1960040000?

A: The Littelfuse 0219.040MXAP provides the closest match, maintaining both 150A breaking capacity and 0.011 melting I²t. This part is from the active 219XA series and carries current regulatory certifications.

Q: Are all substitutes ROHS3 compliant?

A: Most substitutes are ROHS3 compliant. Eaton GDC-40MA and BK/GDC-40MA variants specify RoHS Compliant without explicit ROHS3 designation. Verify specific RoHS requirements for your application before final selection.

Q: Can Littelfuse Series 218 and Eaton alternatives be used interchangeably?

A: All listed substitutes are mechanically and electrically compatible within the specified parameters. Selection between manufacturers depends on certification requirements, supply chain preferences, and specific breaking capacity or melting I²t needs for your circuit design.

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