Littelfuse V33ZC2 Equivalent & Substitute Parts

Part Overview

The Littelfuse V33ZC2 is a 33V 500A disc varistor designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The V33ZC2 series provides single-circuit protection with a 10mm disc form factor suitable for legacy and current production environments requiring identical electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	33 V
Current - Surge	500 A
Maximum AC Volts	20 V
Maximum DC Volts	26 V
Energy	3 J
Capacitance @ 1 MHz	3495 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
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the V33ZC2 is determined by strict equivalence across all electrical and mechanical parameters. The following criteria define valid substitutes:

Varistor voltage range: 29.7 V (minimum) to 36.3 V (maximum)
Surge current capacity: 500 A
Energy dissipation: 3 J
Capacitance: 3495 pF @ 1 MHz
Operating temperature: -55°C to 85°C
Mounting configuration: Through hole, disc 10mm form factor
Number of circuits: 1
RoHS3 compliance and MSL 1 rating

All substitute parts listed maintain identical electrical performance and physical dimensions, ensuring direct replacement capability in existing designs.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Varistor Voltage (Typ)	Surge Current	Energy	Capacitance @ 1 MHz	Operating Temp	Package	Inventory (Pcs)
V33ZC2	Littelfuse Inc.	ZC	Obsolete	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	1112
V33ZC2P	Littelfuse Inc.	ZC	Active	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	866
V33ZC2PX2855	Littelfuse Inc.	ZC	Active	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	788
V33ZA2P	Littelfuse	ZA	Active	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	3400
V33ZA2PX1347	Littelfuse Inc.	ZA	Active	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	623
V33ZA2PX2855	Littelfuse Inc.	ZA	Active	33 V	500 A	3 J	3495 pF	-55°C to 85°C	Disc 10mm	812

Engineering Selection Recommendations

For applications currently using the obsolete V33ZC2, the following selection hierarchy applies:

Direct Series Replacement (ZC Series):

V33ZC2P: Active product status with identical ZC series designation. Bulk packaging. Recommended for direct substitution in existing designs.
V33ZC2PX2855: Active product status, ZC series. Bulk packaging. Functionally equivalent alternative.

Cross-Series Equivalent (ZA Series):

V33ZA2P: Active product status with highest inventory availability (3400 pcs). Parametrically equivalent across all electrical and mechanical specifications. Different series designation does not affect functional performance.
V33ZA2PX1347: Active product status, ZA series variant. Parametrically equivalent.
V33ZA2PX2855: Active product status, ZA series variant. Parametrically equivalent.

All substitute parts maintain ROHS3 compliance and MSL 1 rating. Selection should prioritize active product status parts to ensure long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can V33ZA2P replace V33ZC2 directly? A: Yes. The V33ZA2P is parametrically equivalent across all electrical and mechanical parameters. The series designation change (ZA vs. ZC) does not affect functional performance. Both maintain identical varistor voltage, surge current capacity, energy dissipation, capacitance, operating temperature range, and 10mm disc form factor.

Q: What is the difference between V33ZC2P and V33ZC2PX2855? A: Both are active ZC series products with identical electrical and mechanical specifications. The suffix designation (PX2855) indicates internal manufacturing or traceability coding. Electrical performance and physical dimensions are equivalent.

Q: Why is V33ZC2 listed as obsolete? A: The V33ZC2 is no longer in active production. Active equivalent parts (V33ZC2P, V33ZA2P, and variants) provide identical functionality and are recommended for new designs and ongoing procurement.

Q: Are all substitute parts through-hole mounted? A: Yes. All listed substitute parts maintain through-hole mounting configuration with 10mm disc form factor, ensuring compatibility with existing PCB layouts and assembly processes.

Q: Do substitute parts meet the same compliance standards? A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original V33ZC2 specifications.

Q: Which substitute part has the best inventory availability? A: V33ZA2P has the highest inventory level at 3400 pcs, providing supply chain flexibility for high-volume applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message