Littelfuse V175LC20C Varistor - Equivalent & Substitute Parts

Part Overview

The Littelfuse V175LC20C is a 270 V, 10 kA disc varistor designed for transient voltage suppression applications. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement. The V175LC20C operates across a temperature range of -55°C to 85°C and is housed in a 20mm disc package for through-hole mounting. Its obsolete status necessitates evaluation of active alternative components that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	270 V
Varistor Voltage Range	243 V (Min) – 297 V (Max)
Current - Surge	10 kA
Energy Rating	220 J
Maximum AC Volts	175 V
Capacitance @ 1 MHz	7000 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 20mm
Series	C-III
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the V175LC20C is determined by strict equivalence across the following critical parameters:

Varistor Voltage (Typical): 270 V nominal specification
Varistor Voltage Range: 243 V minimum to 297 V maximum tolerance band
Current - Surge Rating: 10 kA transient suppression capacity
Energy Rating: 220 J dissipation capability
Maximum AC Volts: 175 V continuous voltage rating
Capacitance @ 1 MHz: 7000 pF
Operating Temperature Range: -55°C to 85°C
Mounting Type: Through Hole configuration
Package / Case: Disc 20mm form factor
Series Classification: C-III varistor series
Regulatory Compliance: ROHS3 Compliant status

The V175LC20CP is identified as a direct substitute based on complete electrical and mechanical parameter equivalence. Both components share identical voltage ratings, surge current capacity, energy dissipation, thermal operating range, and physical packaging specifications.

Parameter Comparison

Parameter	V175LC20C (Main Part)	V175LC20CP (Substitute)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)
Series	C-III	C-III
Product Status	Obsolete	Active
Varistor Voltage (Typ)	270 V	270 V
Varistor Voltage (Min)	243 V	243 V
Varistor Voltage (Max)	297 V	297 V
Current - Surge	10 kA	10 kA
Energy	220 J	220 J
Number of Circuits	1	1
Capacitance @ 1 MHz	7000 pF	7000 pF
Operating Temperature	-55°C to 85°C	-55°C to 85°C
Mounting Type	Through Hole	Through Hole
Package / Case	Disc 20mm	Disc 20mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Maximum AC Volts	175 V	175 V
ECCN	EAR99	EAR99
HTSUS	8533.40.4000	8533.40.4000

Engineering Selection Recommendations

The V175LC20CP is a direct functional equivalent to the V175LC20C. The primary distinction between these components is product status: the V175LC20C is obsolete, while the V175LC20CP maintains active production status. Both components are manufactured by Littelfuse Inc. within the C-III varistor series and carry identical electrical specifications, thermal ratings, and regulatory certifications.

For new designs or component replacement in existing systems, the V175LC20CP is the appropriate selection. This substitute maintains full compatibility with circuit designs originally specified for the V175LC20C, with no modifications to PCB layout, mounting procedures, or electrical performance required. Both components satisfy ROHS3 compliance requirements and share identical export classification codes.

Frequently Asked Questions (FAQ)

Q: Can the V175LC20CP be used as a direct replacement for the V175LC20C in existing circuit boards?

A: Yes. The V175LC20CP is electrically and mechanically identical to the V175LC20C. Both components feature the same 20mm disc package, through-hole mounting configuration, and all electrical parameters including varistor voltage, surge current rating, and energy dissipation. No circuit modifications or PCB redesign is required.

Q: What is the primary reason for substituting the V175LC20C?

A: The V175LC20C is classified as obsolete. The V175LC20CP is the active production equivalent from the same manufacturer and series, ensuring continued component availability for system support and new procurement.

Q: Are the voltage ratings identical between these two parts?

A: Yes. Both the V175LC20C and V175LC20CP operate at a nominal varistor voltage of 270 V, with an identical tolerance range of 243 V minimum to 297 V maximum. Maximum AC voltage rating is 175 V for both components.

Q: Do these components have the same surge current capacity?

A: Yes. Both the V175LC20C and V175LC20CP are rated for 10 kA surge current with 220 J energy dissipation capability.

Q: Are there any differences in operating temperature range?

A: No. Both components operate across the identical temperature range of -55°C to 85°C.

Q: What is the capacitance specification for these varistors?

A: Both the V175LC20C and V175LC20CP have a capacitance of 7000 pF measured at 1 MHz.

Q: Are both components RoHS compliant?

A: Yes. Both the V175LC20C and V175LC20CP are ROHS3 compliant and carry the same export classification code EAR99.

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