V12ZTX2 Equivalent & Substitute Parts

Part Overview

The V12ZTX2 is a 12.5 V Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc., designed for single-circuit through-hole applications in a 10mm disc package. This component is classified as obsolete, indicating discontinuation from active production. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system redesign, component sourcing, and long-term product support.

Substiute Parts

V12ZTX2

Littelfuse Inc.In Stock: 843V12ZTX2 Datasheet

Current PartRFQ

V130LA10AP

Littelfuse Inc.In Stock: 1634V130LA10AP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V12ZTX2 is determined by the following critical parameters:

• Varistor Voltage Rating: The typical varistor voltage must align with the circuit protection requirement (12.5 V nominal for the V12ZTX2)
• Surge Current Capacity: The substitute must handle transient surge currents at or above 250 A
• Energy Dissipation: The substitute must dissipate at least 1.2 J per transient event
• Number of Circuits: Single-circuit configuration required
• Mounting Type: Through-hole mounting compatibility
• Package Compatibility: Physical dimensions must accommodate the application footprint

The V130LA10AP is identified as a substitute part from Littelfuse Inc., though it operates at a significantly higher voltage rating (205 V typical) and is intended for different circuit protection applications. This part shares the same manufacturer, through-hole mounting type, single-circuit configuration, and disc package form factor.

Parameter Comparison

Engineering Selection Recommendations

The V130LA10AP is an active production component from Littelfuse Inc. with ROHS3 compliance, addressing the obsolescence of the V12ZTX2. However, direct substitution requires circuit-level evaluation due to significant differences in electrical ratings:

• The V130LA10AP operates at 205 V typical varistor voltage, substantially higher than the V12ZTX2 at 12.5 V
• Surge current capacity increases from 250 A to 4.5 kA
• Energy dissipation increases from 1.2 J to 38 J
• Package size increases from 10mm to 14mm disc

The V130LA10AP is suitable for applications requiring higher voltage protection and greater transient energy absorption. For circuits originally designed for 12.5 V protection, alternative low-voltage varistors from the Littelfuse portfolio should be evaluated to maintain the original voltage rating specification.

Frequently Asked Questions (FAQ)

Q: Can the V130LA10AP directly replace the V12ZTX2 in existing designs?

A: Direct replacement is not recommended without circuit redesign. The V130LA10AP operates at 205 V typical varistor voltage compared to the V12ZTX2 at 12.5 V. Voltage rating mismatch will alter circuit protection characteristics.

Q: What is the significance of the package size difference (10mm vs. 14mm disc)?

A: The increase from 10mm to 14mm disc affects PCB footprint and mounting hole spacing. Physical layout compatibility must be verified before implementation.

Q: Why is the V12ZTX2 listed as obsolete?

A: Obsolete status indicates the component has been discontinued by the manufacturer and is no longer in active production. Existing inventory may be available through authorized distributors, but long-term sourcing is not guaranteed.

Q: Does the V130LA10AP meet RoHS compliance requirements?

A: Yes, the V130LA10AP is ROHS3 compliant, whereas the V12ZTX2 is RoHS non-compliant. This compliance improvement may be required for new product designs or regulatory updates.

Q: Are both parts suitable for through-hole PCB assembly?

A: Yes, both the V12ZTX2 and V130LA10AP are through-hole mounted components. However, the different package sizes require corresponding PCB design modifications.