TMOV34S271M Equivalent & Substitute Parts

Part Overview

The TMOV34S271M is a 430 V, 40 kA transient voltage suppressor (TVS) varistor manufactured by Littelfuse, designed for single-circuit through-hole applications in square 34mm packaging with formed tabs. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing procurement and system maintenance. The part provides transient voltage suppression with thermally protected operation across the -55°C to 85°C temperature range.

Substiute Parts

TMOV34S271M

LittelfuseIn Stock: 716TMOV34S271M Datasheet

Current PartRFQ

TMOV34S271MP

Littelfuse Inc.In Stock: 1288TMOV34S271MP Datasheet

DirectRFQ

TMOV34S271MPX2696

Littelfuse Inc.In Stock: 854TMOV34S271MPX2696 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TMOV34S271M are qualified based on strict electrical and mechanical parameter matching:

Qualifying Parameters for Substitution:

• Varistor voltage range: 387 V (Min) to 473 V (Max)
• Surge current capacity: 40 kA
• Energy rating: 550 J
• Maximum AC/DC voltage ratings: 275 V AC / 369 V DC
• Capacitance: 4500 pF @ 1 MHz
• Operating temperature: -55°C to 85°C
• Mounting configuration: Through hole, square 34mm package with formed tabs, 3-lead
• Number of circuits: 1
• Thermally protected design

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the original TMOV34S271M specification.

Parameter Comparison

Engineering Selection Recommendations

TMOV34S271MP is the primary direct substitute for the obsolete TMOV34S271M. Both parts are manufactured by Littelfuse and maintain identical electrical and mechanical specifications. The key distinction is product status: TMOV34S271MP is active and carries ROHS3 compliance certification, whereas the original part is obsolete and RoHS non-compliant. This substitute is suitable for new designs and ongoing production requiring regulatory compliance.

TMOV34S271MPX2696 is a parametric equivalent offering identical electrical performance and mechanical compatibility. This variant is also active and ROHS3 compliant. Selection between TMOV34S271MP and TMOV34S271MPX2696 depends on packaging and supply chain requirements, as both meet all functional specifications.

For applications where the original TMOV34S271M was specified, either active substitute provides direct functional replacement with improved compliance status.

Frequently Asked Questions (FAQ)

Q: Can TMOV34S271MP directly replace TMOV34S271M in existing designs?

A: Yes. TMOV34S271MP maintains identical electrical parameters (430 V typical varistor voltage, 40 kA surge current, 550 J energy) and mechanical configuration (square 34mm through-hole package with formed tabs, 3-lead). The primary difference is product status and RoHS compliance.

Q: What is the difference between TMOV34S271MP and TMOV34S271MPX2696?

A: Both parts are parametric equivalents with identical electrical specifications and mechanical packaging. The part number suffix indicates different manufacturing or packaging variants. Selection should be based on supply availability and specific procurement requirements.

Q: Is the TMOV34S271M still available for purchase?

A: The TMOV34S271M is classified as obsolete. Active substitutes TMOV34S271MP and TMOV34S271MPX2696 are available and recommended for new procurement.

Q: Are there RoHS compliance differences between the original part and substitutes?

A: Yes. The original TMOV34S271M is RoHS non-compliant. Both substitute parts (TMOV34S271MP and TMOV34S271MPX2696) are ROHS3 compliant, meeting current regulatory requirements.

Q: Will the substitute parts fit the same PCB footprint?

A: Yes. All parts use identical through-hole mounting with square 34mm packaging and formed tabs in a 3-lead configuration, ensuring mechanical and electrical compatibility on existing PCB designs.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching varistor voltage range (387–473 V), surge current (40 kA), energy rating (550 J), maximum voltage ratings (275 V AC / 369 V DC), capacitance (4500 pF @ 1 MHz), operating temperature range (-55°C to 85°C), and mechanical package configuration (square 34mm through-hole, 3-lead).