TVB270SA-L Equivalent & Substitute Parts

Part Overview

The TVB270SA-L is a 270V off-state transient voltage suppressor thyristor manufactured by Littelfuse Inc., rated for 150A peak pulse current in the DO-214AA SMB package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The TVB270SA-L belongs to the SiBar series of TVS thyristors designed for transient voltage suppression applications requiring surface mount packaging.

Substiute Parts

TVB270SA-L

Littelfuse Inc.In Stock: 1358TVB270SA-L Datasheet

Current PartRFQ

SMP100LC-270

STMicroelectronicsIn Stock: 27501SMP100LC-270 Datasheet

MFR RecommendedRFQ

SMP100MC-270

STMicroelectronicsIn Stock: 15529SMP100MC-270 Datasheet

MFR RecommendedRFQ

SMP80MC-270

STMicroelectronicsIn Stock: 1460SMP80MC-270 Datasheet

MFR RecommendedRFQ

SMTPA270

STMicroelectronicsIn Stock: 4219SMTPA270 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TVB270SA-L is determined by the following critical parameters that must remain constant or compatible:

• Voltage - Off State: Must be 270V to maintain circuit protection thresholds
• Package / Case: Must be DO-214AA SMB to ensure mechanical and electrical compatibility with existing PCB layouts
• Mounting Type: Must be Surface Mount to match assembly requirements
• Number of Elements: Must be 1 element configuration

The substitute parts listed below maintain these core parameters while offering variations in peak pulse current ratings (150A, 200A, 300A, or 400A) and breakover voltage characteristics (335V to 360V). These variations allow selection based on specific application current handling requirements while preserving the fundamental 270V protection voltage and SMB package form factor.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions. The selection between substitute options depends on application-specific current handling requirements:

SMTPA270 provides a direct electrical equivalent with identical 150A peak pulse current (8/20µs) and 50A peak pulse current (10/1000µs) ratings. This part is the primary substitute for direct replacement in existing designs.

SMP80MC-270 offers 200A peak pulse current (8/20µs) capability, suitable for applications requiring higher transient current handling than the original 150A specification.

SMP100MC-270 provides 300A peak pulse current (8/20µs) for applications with elevated transient protection requirements.

SMP100LC-270 delivers the highest current rating at 400A peak pulse current (8/20µs), appropriate for high-energy transient suppression applications.

All substitute parts are manufactured by STMicroelectronics and carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete TVB270SA-L.

Frequently Asked Questions (FAQ)

Q: Can SMTPA270 be used as a direct replacement for TVB270SA-L?

A: Yes. SMTPA270 maintains identical off-state voltage (270V), peak pulse current ratings (150A at 8/20µs, 50A at 10/1000µs), and DO-214AA SMB package specifications. The breakover voltage differs by 5V (360V vs 365V), which remains within acceptable circuit protection parameters.

Q: What is the difference between the four substitute parts?

A: The substitute parts differ in peak pulse current ratings and capacitance values. SMTPA270 matches the original 150A rating. SMP80MC-270, SMP100MC-270, and SMP100LC-270 provide progressively higher current ratings (200A, 300A, and 400A respectively) for applications requiring enhanced transient suppression capability.

Q: Are all substitute parts compatible with existing PCB layouts?

A: Yes. All substitute parts use the DO-214AA SMB package with surface mount configuration, ensuring mechanical and electrical compatibility with PCB designs originally specified for TVB270SA-L.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) rating, matching the compliance profile of the original TVB270SA-L.

Q: How does capacitance variation affect circuit performance?

A: Capacitance values range from 25pF to 60pF across the substitute options. Capacitance affects high-frequency transient response characteristics. Selection should be based on specific circuit requirements and transient frequency content.

Q: Why is TVB270SA-L obsolete?

A: The TVB270SA-L is classified as obsolete by Littelfuse Inc. The listed substitute parts from STMicroelectronics provide equivalent or enhanced functionality with active product status and assured long-term availability.