V150ZT4 Equivalent & Substitute Parts

Part Overview

The V150ZT4 is a 150 V, 2.5 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc 10mm package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The varistor provides transient voltage suppression across a single circuit with energy absorption capability of 15 J, suitable for protecting sensitive electronics from voltage transients in industrial and commercial applications.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	150 V
Varistor Voltage Range	135 V – 165 V
Current - Surge	2.5 kA
Maximum AC Volts	95 V
Maximum DC Volts	127 V
Energy	15 J
Capacitance @ 1 MHz	860 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 10mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the V150ZT4 is determined by strict equivalence across the following critical parameters:

Varistor voltage rating: 150 V typical (135 V – 165 V range)
Surge current capacity: 2.5 kA
Energy absorption: 15 J
Maximum AC/DC voltage ratings: 95 V AC / 127 V DC
Capacitance: 860 pF @ 1 MHz
Operating temperature range: -55°C to 85°C
Mounting configuration: Through hole
Physical package: Disc 10mm
Number of circuits: 1
Compliance: ROHS3 Compliant

All substitute parts listed maintain identical electrical and mechanical specifications. Differences exist only in product status (active vs. obsolete), packaging format (bulk vs. tape & reel), and internal series designation (ZT vs. ZS).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Packaging	Varistor Voltage (Typ)	Surge Current	Energy	Max AC / DC Volts	Capacitance @ 1 MHz	Operating Temp	RoHS Status	Inventory
V150ZT4	Littelfuse Inc.	ZT	Obsolete	Bulk	150 V	2.5 kA	15 J	95 V / 127 V	860 pF	-55°C to 85°C	ROHS3	719 Pcs
V150ZT4P	Littelfuse Inc.	ZT	Active	Tape & Reel	150 V	2.5 kA	15 J	95 V / 127 V	860 pF	-55°C to 85°C	ROHS3	870 Pcs
V150ZS4P	Littelfuse Inc.	ZS	Active	Tape & Reel	150 V	2.5 kA	15 J	95 V / 127 V	860 pF	-55°C to 85°C	ROHS3	958 Pcs
V150ZT4PX2855	Littelfuse Inc.	ZT	Active	Tape & Reel	150 V	2.5 kA	15 J	95 V / 127 V	860 pF	-55°C to 85°C	ROHS3	794 Pcs
V150ZS4PX2855	Littelfuse Inc.	ZS	Active	Tape & Reel	150 V	2.5 kA	15 J	95 V / 127 V	860 pF	-55°C to 85°C	ROHS3	1029 Pcs

Engineering Selection Recommendations

All listed substitute parts are direct electrical and mechanical equivalents to the V150ZT4. Selection among the active alternatives is based on the following factors:

Product Status: The V150ZT4 is obsolete. All substitute parts (V150ZT4P, V150ZS4P, V150ZT4PX2855, V150ZS4PX2855) carry active product status, ensuring long-term availability and continued manufacturer support.

Packaging Format: The original V150ZT4 is supplied in bulk packaging. For automated assembly processes, the tape & reel (TR) packaged variants (V150ZT4P, V150ZS4P, V150ZT4PX2855, V150ZS4PX2855) are preferred. For manual or low-volume assembly, bulk packaging may be sourced through alternative channels.

Series Designation: Both ZT and ZS series variants meet identical electrical specifications. Series designation reflects internal manufacturing classification and does not affect functional performance or compatibility.

Compliance: All parts are ROHS3 compliant and suitable for applications requiring environmental compliance certification.

Frequently Asked Questions (FAQ)

Q: Can V150ZT4P be used as a direct replacement for V150ZT4?

A: Yes. V150ZT4P is electrically and mechanically identical to V150ZT4. The primary difference is product status (active vs. obsolete) and packaging format (tape & reel vs. bulk). Both are ZT series components with identical electrical ratings.

Q: What is the difference between ZT and ZS series variants?

A: ZT and ZS designations represent different internal series classifications within Littelfuse's varistor product line. All electrical and mechanical parameters are identical across both series for the 150 V, 2.5 kA rating. Series selection does not affect circuit performance or compatibility.

Q: Are the X2855 variants functionally equivalent?

A: Yes. V150ZT4PX2855 and V150ZS4PX2855 are parametrically identical to their non-X2855 counterparts. The X2855 suffix indicates a specific manufacturing or traceability designation but does not alter electrical specifications or performance characteristics.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring tape & reel packaging, V150ZT4P, V150ZS4P, V150ZT4PX2855, or V150ZS4PX2855 are all suitable. All four parts are active products with equivalent electrical performance. Selection may be based on packaging availability, lead time, or internal procurement preferences.

Q: Is the through-hole mounting configuration maintained across all substitutes?

A: Yes. All substitute parts retain the through-hole mounting type and disc 10mm physical package, ensuring direct PCB compatibility without layout modifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the original V150ZT4.

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