V18MLA0805H Equivalent & Substitute Parts

Part Overview

The V18MLA0805H is a 25 V, 120 A varistor in 0805 (2012 Metric) surface mount package manufactured by Littelfuse. This component is classified as a Transient Voltage Suppressor (TVS) and is designed for single-circuit overvoltage protection applications. The part is currently listed as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

V18MLA0805H

LittelfuseIn Stock: 1162V18MLA0805H Datasheet

Current PartRFQ

V18MLA0805NH

Littelfuse Inc.In Stock: 135133V18MLA0805NH Datasheet

Parametric EquivalentRFQ

V18MLA0805NT

Littelfuse Inc.In Stock: 10792V18MLA0805NT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the V18MLA0805H are identified based on strict electrical and mechanical parameter matching within the MLA series varistor family. The following parameters define substitution eligibility:

• Maximum DC Volts: 18 V
• Varistor Voltage (Typical): 25 V
• Varistor Voltage Range: 22 V (Min) to 28 V (Max)
• Current - Surge: 120 A
• Energy: 0.3 J
• Package / Case: 0805 (2012 Metric)
• Mounting Type: Surface Mount, MLCV
• Operating Temperature Range: -40°C to 125°C
• Number of Circuits: 1
• Capacitance @ Frequency: 520 pF @ 1 MHz

All substitute parts maintain identical electrical performance specifications and physical form factor, differing only in packaging configuration (Tape & Reel) and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

Both V18MLA0805NH and V18MLA0805NT are direct parametric equivalents to the obsolete V18MLA0805H. Selection between these active alternatives is based on packaging and availability:

V18MLA0805NH is supplied in Tape & Reel (TR) packaging with 135,100 units in stock inventory.

V18MLA0805NT is supplied in Tape & Reel (TR) packaging with 10,756 units in stock inventory.

Both parts maintain ROHS3 compliance and REACH Unaffected status. The choice between these substitutes depends on procurement volume requirements and supply chain availability rather than electrical or mechanical performance differences.

Frequently Asked Questions (FAQ)

Q: Can V18MLA0805NH or V18MLA0805NT be used as direct replacements for V18MLA0805H?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (25 V typical varistor voltage, 120 A surge current, 0.3 J energy rating) and physical form factor (0805 surface mount package). The primary difference is product status: the original part is obsolete while the substitutes are active.

Q: What is the difference between V18MLA0805NH and V18MLA0805NT?

A: Both parts are electrically and mechanically identical. The difference is packaging configuration and inventory availability. V18MLA0805NH has higher stock levels (135,100 units) compared to V18MLA0805NT (10,756 units).

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts maintain ROHS3 compliance. V18MLA0805NH and V18MLA0805NT additionally carry REACH Unaffected status.

Q: Can these varistors be used interchangeably in PCB assembly?

A: Yes. All three parts share identical mounting type (Surface Mount, MLCV) and package dimensions (0805 / 2012 Metric), enabling direct PCB layout compatibility without design modification.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching maximum DC voltage (18 V), varistor voltage range (22–28 V typical 25 V), surge current rating (120 A), energy dissipation (0.3 J), and operating temperature range (-40°C to 125°C).