Equivalent & Substitute Parts for 0217.040H

Part Overview

The Littelfuse 0217.040H is a 40 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The fuse requires a holder for installation and is designed for circuit protection applications requiring fast response characteristics.

Key Parameters

Parameter	Value
Current Rating	40 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution for the 0217.040H is determined by strict equivalence across the following critical parameters:

Current Rating: 40 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity: 35A (exact match required)

Parts meeting all these criteria are classified as direct substitutes. The 0217.040H has five direct substitutes from Eaton Electronics Division (GDB-40MA, BK/GDB-40MA, BK/S500-40-R, BK1/S500-40-R, S500-40-R) and one parametric equivalent from SCHURTER Inc. (0034.1528).

Note: GDB-400MA is listed in the original substitute field but has a current rating of 400 mA and is not a valid substitute for the 40 mA requirement.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Package	Response Time	Breaking Capacity	Melting I²t	DC Cold Resistance	Product Status	RoHS Status
0217.040H	Littelfuse Inc.	40 mA	250 V	5mm x 20mm	Fast Blow	35A	8.5E-05	183.2 Ohms	Obsolete	Non-compliant
GDB-40MA	Eaton - Electronics Division	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.00011	25 Ohms	Active	Compliant
BK/GDB-40MA	Eaton - Electronics Division	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.00011	25 Ohms	Active	Compliant
BK/S500-40-R	Eaton - Electronics Division	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.00011	25 Ohms	Active	ROHS3 Compliant
BK1/S500-40-R	Eaton - Electronics Division	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.00011	25 Ohms	Active	Compliant
S500-40-R	Eaton - Electronics Division	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.00011	25 Ohms	Active	ROHS3 Compliant
0034.1528	SCHURTER Inc.	40 mA	250 V	5mm x 20mm	Fast Blow	35A	0.000128	Not provided	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed meet the critical electrical and mechanical parameters required for direct substitution with the 0217.040H. Selection should be based on the following factors:

Active Product Status: All substitute parts are classified as active products, ensuring ongoing availability and support. The original 0217.040H is obsolete.

RoHS Compliance: For applications requiring RoHS compliance, BK/S500-40-R, BK1/S500-40-R, S500-40-R, and 0034.1528 are compliant options. GDB-40MA and BK/GDB-40MA are RoHS compliant. The original 0217.040H is non-compliant.

Approval Certifications: The original 0217.040H carries CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE approvals. The 0034.1528 from SCHURTER carries CCC, cURus, and VDE approvals. Eaton parts do not list approval agencies in the provided data.

Inventory Availability: 0034.1528 has the highest inventory level at 3,622 pieces. Eaton parts range from 705 to 1,141 pieces in stock.

DC Cold Resistance: The original part has 183.2 Ohms resistance, while all Eaton substitutes have 25 Ohms. This difference reflects manufacturing variations between suppliers but does not affect functional substitution within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts directly in place of the 0217.040H?

A: Yes. All listed substitute parts meet the critical parameters: 40 mA current rating, 250 V AC voltage rating, 5mm x 20mm package, fast-blow response, and 35A breaking capacity. Physical form factor and electrical characteristics are equivalent.

Q: What is the difference between the Eaton GDB and S500 series fuses?

A: Both series meet the same electrical and mechanical specifications for the 40 mA, 250 V application. The difference is in product line designation and internal construction. Selection between them depends on availability and specific system requirements.

Q: Why does the 0034.1528 have a different melting I²t value?

A: Melting I²t variations between manufacturers reflect differences in internal construction and material composition while maintaining the same functional response characteristics. All parts are fast-blow fuses with equivalent circuit protection performance at the specified current and voltage ratings.

Q: Is the 0217.040H still available?

A: The 0217.040H is classified as obsolete. Active substitutes from Eaton and SCHURTER are recommended for new designs and ongoing maintenance.

Q: Do I need to change the fuse holder when switching to a substitute part?

A: No. All substitute parts use the same 5mm x 20mm form factor and require the same holder type as the original 0217.040H.

Q: Which substitute offers the best RoHS compliance?

A: BK/S500-40-R, BK1/S500-40-R, S500-40-R, and 0034.1528 are all ROHS3 compliant. GDB-40MA and BK/GDB-40MA are RoHS compliant. Selection depends on your specific compliance requirements.

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