V27ZA1 Equivalent & Substitute Parts

Part Overview

The V27ZA1 is a 27 V, 250 A Transient Voltage Suppressor (TVS) varistor in a through-hole disc 7mm package manufactured by Littelfuse Inc. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The V27ZA1 operates across a temperature range of -55°C to 85°C and is designed for single-circuit transient voltage suppression applications.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	27 V
Current - Surge	250 A
Maximum AC Volts	17 V
Maximum DC Volts	22 V
Energy	1 J
Capacitance @ 1 MHz	1875 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
Number of Circuits	1

Substitute Part Grouping Explanation

Substitution for the V27ZA1 is determined by electrical and mechanical parameter equivalence. All substitute parts maintain identical specifications across the following critical parameters: varistor voltage range (24.3 V minimum to 29.7 V maximum, 27 V typical), surge current rating (250 A), maximum AC and DC voltage ratings (17 V AC, 22 V DC), energy dissipation (1 J), capacitance (1875 pF @ 1 MHz), operating temperature range (-55°C to 85°C), and physical form factor (through-hole disc 7mm package). Substitutes are grouped into two categories: direct manufacturer equivalents (V27ZA1P and V27ZA1PX2855) and parametric equivalents from an alternative series (V27ZC1P and V27ZC1PX2855). All substitute parts are active products with current manufacturing status and improved compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Varistor Voltage (Typ)	Surge Current	Max AC / DC Volts	Energy	Capacitance @ 1 MHz	Operating Temp	Package	RoHS Status
V27ZA1	Littelfuse Inc.	ZA	Obsolete	27 V	250 A	17 V / 22 V	1 J	1875 pF	-55°C to 85°C	Disc 7mm	Non-compliant
V27ZA1P	Littelfuse Inc.	ZA	Active	27 V	250 A	17 V / 22 V	1 J	1875 pF	-55°C to 85°C	Disc 7mm	ROHS3 Compliant
V27ZA1PX2855	Littelfuse	ZA	Active	27 V	250 A	17 V / 22 V	1 J	1875 pF	-55°C to 85°C	Disc 7mm	ROHS3 Compliant
V27ZC1P	Littelfuse Inc.	ZC	Active	27 V	250 A	17 V / 22 V	1 J	1875 pF	-55°C to 85°C	Disc 7mm	ROHS3 Compliant
V27ZC1PX2855	Littelfuse Inc.	ZC	Active	27 V	250 A	17 V / 22 V	1 J	1875 pF	-55°C to 85°C	Disc 7mm	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring replacement of the obsolete V27ZA1, the V27ZA1P is the primary direct equivalent, offering identical electrical and mechanical specifications with active product status and ROHS3 compliance. The V27ZA1PX2855 provides an alternative within the same ZA series with equivalent performance characteristics and ROHS3 compliance. The V27ZC1P and V27ZC1PX2855 represent parametric equivalents from the ZC series, maintaining all critical electrical parameters and physical form factor while offering active product status and ROHS3 compliance. Selection between these options should be based on packaging requirements (bulk vs. alternative packaging designations) and inventory availability. All substitute parts are REACH unaffected and carry the same ECCN and HTSUS classifications as the original component.

Frequently Asked Questions (FAQ)

Q: Can V27ZA1P be used as a direct replacement for V27ZA1? A: Yes. V27ZA1P is a direct manufacturer equivalent with identical electrical specifications (27 V typical varistor voltage, 250 A surge current, 1 J energy, 1875 pF capacitance) and physical form factor (through-hole disc 7mm). The primary difference is product status (active vs. obsolete) and improved RoHS compliance.

Q: What is the difference between V27ZA1P and V27ZA1PX2855? A: Both parts are electrically and mechanically identical with the same varistor voltage, surge current rating, and package type. The designation difference reflects packaging or tape/reel configuration variants. Both are active products with ROHS3 compliance.

Q: Are V27ZC1P and V27ZC1PX2855 suitable substitutes? A: Yes. These parts are parametric equivalents from the ZC series, maintaining all critical electrical parameters (27 V varistor voltage, 250 A surge current, 1 J energy, 1875 pF capacitance) and the same through-hole disc 7mm package. Series designation (ZC vs. ZA) does not affect functional compatibility for the specified electrical requirements.

Q: What compliance certifications apply to substitute parts? A: All substitute parts (V27ZA1P, V27ZA1PX2855, V27ZC1P, V27ZC1PX2855) are ROHS3 compliant and REACH unaffected. The original V27ZA1 is RoHS non-compliant, making substitution necessary for applications with RoHS requirements.

Q: Are there any temperature or operating condition differences? A: No. All substitute parts maintain the identical operating temperature range of -55°C to 85°C and the same maximum AC (17 V) and DC (22 V) voltage ratings as the original V27ZA1.

Q: Can these parts be used interchangeably in PCB designs? A: Yes. All substitute parts share the same through-hole disc 7mm package and mounting type, allowing direct PCB footprint compatibility without design modifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message