Littelfuse 0217.800H Glass Cartridge Fuse 800mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0217.800H is an 800mA 250VAC fast-blow glass cartridge fuse in 5x20mm form factor, part of the 217 series. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit board replacement without design modification.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (800mA), voltage rating (250VAC), fuse type (cartridge glass), response time (fast blow), physical dimensions (5x20mm), and breaking capacity (35A). All substitute parts listed maintain these core electrical and mechanical specifications.

Littelfuse 217 series parts (0217.800HXP, 0217.800MXBP, 0217.800MXP, 0217.800TXP, 0217.800VXP) are direct parametric equivalents with active product status and RoHS3 compliance. Littelfuse 235 series parts (0235.800HXP, 0235.800MXP, 0235.800VXP) and 617 series part (0617.800MXP) maintain identical electrical ratings and physical form factor. The Eaton BK/GDB-800MA provides an alternative from a different manufacturer with equivalent specifications.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package	Breaking Capacity	Product Status	RoHS Status	Melting I²t	DC Cold Resistance (Ohms)
0217.800H	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Obsolete	Non-compliant	0.847	0.12
0217.800HXP	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
0217.800MXBP	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
0217.800MXP	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
0217.800TXP	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
0217.800VXP	Littelfuse Inc.	217	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
0235.800HXP	Littelfuse Inc.	235	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.253	0.192
0235.800MXP	Littelfuse Inc.	235	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.253	0.192
0235.800VXP	Littelfuse Inc.	235	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.253	0.192
0617.800MXP	Littelfuse	617	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.85	0.1203
BK/GDB-800MA	Eaton - Electronics Division	GDB	800 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS3 Compliant	0.67	0.14

Engineering Selection Recommendations

For direct replacement of the obsolete 0217.800H, the Littelfuse 217 series active alternatives (0217.800HXP, 0217.800MXBP, 0217.800MXP, 0217.800TXP, 0217.800VXP) are the primary selection candidates. These parts maintain identical electrical specifications, physical dimensions, and fast-blow response characteristics while offering RoHS3 compliance and active product status with established supply availability.

The Littelfuse 235 series (0235.800HXP, 0235.800MXP, 0235.800VXP) and 617 series (0617.800MXP) provide equivalent electrical and mechanical performance with the same form factor. Selection between 217 and 235/617 series should be based on application-specific certification requirements, as the 235 series carries reduced approval agency coverage (CE, CSA, KC, UL) compared to the 217 series (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE).

The Eaton BK/GDB-800MA offers cross-manufacturer equivalence with identical current, voltage, and breaking capacity ratings. This option is suitable for applications where multi-source qualification is required or where Eaton components are preferred within the supply chain.

Frequently Asked Questions (FAQ)

Q: Can the 0217.800HXP directly replace the obsolete 0217.800H?

A: Yes. Both parts share identical current rating (800mA), voltage rating (250VAC), response time (fast blow), physical dimensions (5x20mm), and breaking capacity (35A). The 0217.800HXP is the active equivalent with RoHS3 compliance.

Q: What is the difference between Littelfuse 217 and 235 series fuses?

A: Both series maintain identical electrical ratings and physical form factors for the 800mA 250VAC specification. The primary difference is melting I²t value (0.85 for 217 series versus 0.253 for 235 series) and approval agency certifications. The 235 series has narrower certification coverage.

Q: Are Littelfuse and Eaton fuses interchangeable in the same holder?

A: Yes, for the 5x20mm form factor. The Eaton BK/GDB-800MA maintains identical physical dimensions and electrical specifications, allowing installation in the same cartridge holder as Littelfuse equivalents.

Q: Does the DC cold resistance difference between parts affect circuit operation?

A: DC cold resistance values (ranging from 0.12 to 0.192 Ohms across listed parts) are within normal manufacturing tolerance for this fuse category and do not affect circuit protection performance at the specified 800mA rating.

Q: Which substitute part has the highest inventory availability?

A: The Littelfuse 0617.800MXP has the highest reported inventory at 11,400 pieces, followed by 0235.800MXP at 2,890 pieces.

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