V175LA2 Equivalent & Substitute Parts

Part Overview

The V175LA2 is a 270 V, 1.2 kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole disc 7mm packaging. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer series.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	270 V
Current - Surge	1.2 kA
Maximum AC Volts	175 V
Maximum DC Volts	225 V
Energy	15 J
Mounting Type	Through Hole
Package / Case	Disc 7mm
Operating Temperature Range	-55°C to 85°C
Capacitance @ 1 MHz	130 pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the V175LA2 is determined by strict equivalence across all critical electrical and mechanical parameters. The following criteria define valid substitutes:

Varistor voltage range: 243 V (Min) to 297 V (Max)
Surge current capacity: 1.2 kA
Maximum AC and DC voltage ratings: 175 V AC / 225 V DC
Energy dissipation: 15 J
Mounting configuration: Through Hole
Package form factor: Disc 7mm
Operating temperature: -55°C to 85°C
Capacitance: 130 pF @ 1 MHz

All substitute parts listed maintain these specifications without deviation. Substitutes are grouped by product status and series designation (LA or LC series).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Max AC Volts	Max DC Volts	Varistor Voltage (Typ)	Surge Current	Energy	Package	RoHS Status	Inventory
V175LA2	Littelfuse Inc.	LA	Obsolete	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	1052 Pcs
V175LA2P	Littelfuse Inc.	LA	Active	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	2680 Pcs
V175LA2PX1347	Littelfuse Inc.	LA	Active	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	969 Pcs
V175LA2PX2855	Littelfuse Inc.	LA	Active	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	993 Pcs
V175LC2P	Littelfuse Inc.	LC	Active	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	699 Pcs
V175LC2PX2855	Littelfuse Inc.	LC	Active	175 V	225 V	270 V	1.2 kA	15 J	Disc 7mm	ROHS3	1161 Pcs

Engineering Selection Recommendations

All substitute parts maintain full electrical and mechanical equivalence to the V175LA2. Selection among available substitutes is based on product status and compliance certification:

Primary Recommendation: V175LA2P is the direct active equivalent, maintaining LA series designation with identical specifications and highest inventory availability (2680 Pcs). This part carries Active product status and ROHS3 compliance.

Secondary Alternatives: V175LA2PX1347 and V175LA2PX2855 are parametric equivalents within the LA series, both Active status with ROHS3 compliance. These variants differ only in internal traceability codes (X1347 and X2855 designations) and maintain full electrical compatibility.

Cross-Series Equivalent: V175LC2P and V175LC2PX2855 represent LC series alternatives with identical electrical specifications and Active product status. These parts are functionally interchangeable for all circuit applications requiring 270 V varistor protection at 1.2 kA surge capacity.

All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level), ensuring compatibility with standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can V175LA2 be directly replaced with V175LA2P? A: Yes. V175LA2P is the direct active equivalent with identical electrical specifications, surge current rating, package form factor, and operating temperature range. The primary difference is product status (Active vs. Obsolete) and packaging designation (Bulk).

Q: What is the difference between LA and LC series substitutes? A: LA and LC series designations indicate different internal design generations within the Littelfuse varistor product line. Both series maintain identical electrical performance for the 270 V / 1.2 kA specification. Selection between series is based on availability and procurement preference, as electrical behavior is equivalent.

Q: Are the X1347 and X2855 variants functionally different? A: No. The X1347 and X2855 suffixes represent internal traceability or manufacturing batch codes and do not affect electrical or mechanical performance. All variants maintain the specified 270 V varistor voltage, 1.2 kA surge current, and Disc 7mm package configuration.

Q: Can these parts be used in new designs or only as replacements? A: All Active status parts (V175LA2P, V175LA2PX1347, V175LA2PX2855, V175LC2P, V175LC2PX2855) are suitable for new design implementations. The V175LA2 (Obsolete) should be replaced with an Active equivalent for ongoing production.

Q: What is the minimum varistor voltage tolerance? A: The varistor voltage range is 243 V (minimum) to 297 V (maximum), with typical value of 270 V. All listed substitutes operate within this tolerance band.

Q: Are all substitutes ROHS3 compliant? A: Yes. All substitute parts carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions for electronic components.

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