Littelfuse V330ZA05 Varistor: Equivalent & Substitute Parts

Part Overview

The Littelfuse V330ZA05 is a 340 V, 400 A transient voltage suppressor varistor in a through-hole disc 5mm package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The V330ZA05 series provides transient voltage suppression across a single circuit with 9 J energy rating and operates across the temperature range of -55°C to 85°C. Direct manufacturer equivalents and parametric alternatives from the Littelfuse ZA and ZC series maintain identical electrical and mechanical specifications, ensuring functional interchangeability in existing applications.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	340 V
Current - Surge	400 A
Maximum AC Volts	210 V
Maximum DC Volts	275 V
Energy	9 J
Capacitance @ 1 MHz	70 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 5mm
Number of Circuits	1

Substitute Part Grouping Explanation

Substitution of the obsolete V330ZA05 is determined by strict equivalence across all critical electrical and mechanical parameters. The allowed substitution criteria are:

Varistor Voltage (Min/Typ/Max): 306 V / 340 V / 374 V
Current - Surge: 400 A
Maximum AC Volts: 210 V
Maximum DC Volts: 275 V
Energy: 9 J
Capacitance @ 1 MHz: 70 pF
Operating Temperature Range: -55°C to 85°C
Mounting Type: Through Hole
Package / Case: Disc 5mm
Number of Circuits: 1
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain these exact specifications. Substitutes are grouped into two categories: direct manufacturer equivalents (same part number with different packaging designation) and parametric equivalents (alternative series designations with identical electrical performance).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Varistor Voltage (Typ)	Current - Surge	Max AC / DC Volts	Energy	Capacitance @ 1 MHz	Operating Temp	Package	RoHS Status
V330ZA05	Littelfuse Inc.	ZA	Obsolete	340 V	400 A	210 V / 275 V	9 J	70 pF	-55°C to 85°C	Disc 5mm	ROHS3 Compliant
V330ZA05P	Littelfuse Inc.	ZA	Active	340 V	400 A	210 V / 275 V	9 J	70 pF	-55°C to 85°C	Disc 5mm	ROHS3 Compliant
V330ZA05PX2855	Littelfuse Inc.	ZA	Active	340 V	400 A	210 V / 275 V	9 J	70 pF	-55°C to 85°C	Disc 5mm	ROHS3 Compliant
V330ZC05P	Littelfuse Inc.	ZC	Active	340 V	400 A	210 V / 275 V	9 J	70 pF	-55°C to 85°C	Disc 5mm	ROHS3 Compliant
V330ZC05PX2855	Littelfuse Inc.	ZC	Active	340 V	400 A	210 V / 275 V	9 J	70 pF	-55°C to 85°C	Disc 5mm	ROHS3 Compliant

Engineering Selection Recommendations

The V330ZA05 is obsolete and must be replaced with an active equivalent. All listed substitute parts are manufactured by Littelfuse Inc. and maintain full ROHS3 compliance and REACH unaffected status where applicable.

For new designs and ongoing procurement, V330ZA05P is the direct active equivalent with identical electrical and mechanical specifications. This part is available in bulk packaging and carries active product status.

V330ZA05PX2855 and V330ZC05P are parametric equivalents with identical performance characteristics. The ZC series designation (V330ZC05P and V330ZC05PX2855) represents an alternative internal series classification within Littelfuse's product line but maintains complete electrical and mechanical interchangeability.

All substitute parts are suitable for direct replacement in existing through-hole PCB designs without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can V330ZA05 be directly replaced with V330ZA05P?

A: Yes. V330ZA05P is the active equivalent of the obsolete V330ZA05. Both parts share identical electrical specifications (340 V typical varistor voltage, 400 A surge current, 9 J energy) and mechanical form factor (through-hole disc 5mm package). The difference is packaging designation (bulk vs. original) and product status (active vs. obsolete).

Q: What is the difference between the ZA and ZC series substitutes?

A: V330ZA05PX2855 and V330ZC05P/V330ZC05PX2855 are parametric equivalents with identical electrical and mechanical specifications. The series designation (ZA vs. ZC) represents internal Littelfuse product line classification but does not affect functional performance or compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and suitable for applications requiring environmental compliance certification.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All substitute parts maintain identical varistor voltage (340 V typical), surge current rating (400 A), energy dissipation (9 J), operating temperature range (-55°C to 85°C), and through-hole disc 5mm package configuration. No circuit modification or PCB redesign is required.

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

A: V330ZA05P is the recommended direct equivalent for new procurement. It is manufactured by Littelfuse Inc., carries active product status, and is available in bulk packaging with full inventory availability.

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