Littelfuse V33ZA2P Equivalent & Substitute Parts

Part Overview

The Littelfuse V33ZA2P is a 33 V, 500 A Transient Voltage Suppressor (TVS) varistor in a 10mm disc package designed for through-hole mounting. This component provides transient overvoltage protection in single-circuit applications with a nominal varistor voltage of 33 V and energy absorption capability of 3 J. The part is Active status and ROHS3 compliant, making it suitable for modern electronic protection circuits requiring reliable surge suppression across industrial and commercial applications.

Equivalent and substitute parts are identified when they maintain the same electrical performance envelope and mechanical compatibility, allowing for design flexibility, supply chain optimization, and inventory management without compromising circuit protection requirements.

Substiute Parts

V33ZA2P

LittelfuseIn Stock: 3471V33ZA2P Datasheet

Current PartRFQ

B72210S0200K101

EPCOS - TDK ElectronicsIn Stock: 8495B72210S0200K101 Datasheet

MFR RecommendedRFQ

ERZ-V10D330

Panasonic Electronic ComponentsIn Stock: 13707ERZ-V10D330 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the V33ZA2P are qualified based on the following critical parameters that determine functional equivalence:

• Varistor Voltage Range: Nominal 33 V with acceptable tolerance band (Min: 29.7 V, Max: 36.3 V)
• Maximum DC Operating Voltage: 26 V maximum
• Maximum AC Operating Voltage: 20 V maximum
• Number of Circuits: Single circuit configuration
• Mounting Configuration: Through-hole mounting
• RoHS Compliance: ROHS3 Compliant status
• Environmental Compliance: REACH Unaffected status

The identified substitutes maintain these core electrical and mechanical parameters within acceptable engineering tolerances. Variations in surge current capacity, energy absorption, package dimensions, and operating temperature ranges are documented to support application-specific selection criteria.

Parameter Comparison

Engineering Selection Recommendations

B72210S0200K101 (EPCOS - TDK Electronics)

This substitute maintains identical electrical specifications to the V33ZA2P across all critical parameters: varistor voltage range, maximum DC/AC operating voltages, surge current capacity, and circuit configuration. The package footprint is identical (Disc 10mm). The extended operating temperature range (-40°C ~ 105°C) provides additional thermal margin compared to the original part. Both parts are Active status and ROHS3 compliant with REACH Unaffected certification. This part is directly interchangeable for applications requiring 33 V, 500 A protection.

ERZ-V10D330 (Panasonic Electronic Components)

This substitute maintains the same varistor voltage specification (33 V nominal) and operating voltage limits (26 V DC, 20 V AC) as the V33ZA2P. The surge current capacity is doubled to 1 kA with proportionally increased energy absorption (4.8 J versus 3 J), providing enhanced transient protection capability. The package is a Disc 11.5mm configuration, requiring PCB layout verification for mechanical fit. Both parts are Active status and ROHS3 compliant with REACH Unaffected certification. This part is suitable for applications where higher surge current handling or energy absorption is beneficial within the same voltage protection envelope.

Frequently Asked Questions (FAQ)

Q: Can B72210S0200K101 be used as a direct replacement for V33ZA2P?

A: Yes. Both parts share identical varistor voltage specifications (33 V nominal, 29.7 V to 36.3 V range), maximum operating voltages (26 V DC, 20 V AC), surge current rating (500 A), and package dimensions (Disc 10mm). The electrical performance and mechanical compatibility are equivalent.

Q: What is the primary difference between ERZ-V10D330 and V33ZA2P?

A: The ERZ-V10D330 has a higher surge current rating (1 kA versus 500 A) and greater energy absorption (4.8 J versus 3 J). The package diameter is larger (11.5mm versus 10mm). The varistor voltage protection level remains identical at 33 V nominal. Selection depends on whether the application requires the enhanced surge handling capability and whether the larger package fits the PCB layout.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. V33ZA2P, B72210S0200K101, and ERZ-V10D330 are all ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Does package size affect electrical performance?

A: Package size (10mm versus 11.5mm disc) does not affect the electrical protection characteristics. The varistor voltage, operating voltage limits, and surge current handling are determined by the internal varistor material and construction, not the external package dimensions. Package selection is based on PCB layout constraints and mechanical fit requirements.

Q: Can ERZ-V10D330 be used in applications designed for 500 A surge protection?

A: Yes. The ERZ-V10D330 is rated for 1 kA surge current, which exceeds the 500 A requirement. It provides equivalent or superior protection at the same 33 V varistor voltage level. The application will benefit from the higher surge capacity and energy absorption margin.

Q: What is the operating temperature consideration when selecting between these parts?

A: V33ZA2P operates from -55°C to 85°C. B72210S0200K101 extends to -40°C to 105°C, providing wider thermal range. ERZ-V10D330 operates from -40°C to 85°C. Selection should match the application's thermal environment. The extended range of B72210S0200K101 is advantageous for high-temperature applications.