Littelfuse 0318.200H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.200H is a 200 mA, 250 V AC/DC fast-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The substitute parts listed maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	35 A
Melting I²t	0.0165
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	3 Ohms

Substitute Part Grouping Explanation

Substitution eligibility for the 0318.200H is determined by strict equivalence across the following critical parameters:

Current Rating: 200 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
Mounting Type: Through Hole (exact match required)
Breaking Capacity @ Rated Voltage: 35 A (exact match required)
Melting I²t: 0.0165 (exact match required)

All three substitute parts (0318.200HXP, 0318.200MXP, 0318.200VXP) meet these criteria and are direct functional equivalents of the 0318.200H.

Parameter Comparison

Parameter	0318.200H (Main)	0318.200HXP	0318.200MXP	0318.200VXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	200 mA	200 mA	200 mA	200 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	35 A	35 A	35 A	35 A
Melting I²t	0.0165	0.0165	0.0165	0.0165
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	3 Ohms	3.02 Ohms	3.02 Ohms	3.02 Ohms
Product Status	Obsolete	Active	Active	Active
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
REACH Status	Not specified	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts (0318.200HXP, 0318.200MXP, 0318.200VXP) are functionally equivalent to the 0318.200H and provide direct replacement capability. The primary distinction between the main part and substitutes is product status and regulatory compliance:

The 0318.200H is classified as obsolete, whereas all substitute parts maintain active product status. The substitute parts carry expanded approval certifications (CE, CSA, UL versus CSA, UL) and comply with ROHS3 and REACH requirements, whereas the main part is RoHS non-compliant. The substitute parts also specify an operating temperature range of -55°C to 125°C.

DC cold resistance values for the substitute parts (3.02 Ohms) are negligibly higher than the main part (3 Ohms) and remain within acceptable tolerance for this component category.

Frequently Asked Questions (FAQ)

Q: Can the 0318.200HXP, 0318.200MXP, or 0318.200VXP be used as direct replacements for the 0318.200H?

A: Yes. All three substitute parts are electrically and mechanically equivalent to the 0318.200H. They share identical current ratings (200 mA), voltage ratings (250 V AC), fuse type (cartridge, glass), response time (fast blow), package format (3AB/3AG), and breaking capacity (35 A).

Q: What is the difference between the three substitute parts?

A: The 0318.200HXP, 0318.200MXP, and 0318.200VXP are parametrically equivalent. All three maintain identical electrical and mechanical specifications. Differences exist only in packaging designation and internal construction variants, which do not affect functional performance or compatibility.

Q: Why is the 0318.200H classified as obsolete?

A: The 0318.200H is no longer in active production. The substitute parts listed represent the current active alternatives from Littelfuse Inc. for this fuse specification.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three substitute parts (0318.200HXP, 0318.200MXP, 0318.200VXP) are ROHS3 compliant, whereas the main part (0318.200H) is RoHS non-compliant.

Q: What is the operating temperature range for these fuses?

A: The substitute parts operate across -55°C to 125°C. The main part does not specify an operating temperature range.

Q: Are there any differences in DC cold resistance between the main part and substitutes?

A: The main part specifies 3 Ohms DC cold resistance, while the substitute parts specify 3.02 Ohms. This difference is negligible and does not affect circuit performance.

Q: Can these fuses be used in both AC and DC applications?

A: Yes. All parts are rated for 250 V AC/DC operation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message