TVB140MSB-L Equivalent & Substitute Parts

Part Overview

The TVB140MSB-L is a 140V off-state transient voltage suppressor thyristor manufactured by Littelfuse Inc., housed in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part delivers 250A peak pulse current (8/20µs) with a 4V on-state voltage and 150mA hold current, designed for transient voltage protection applications requiring high current handling in compact form factors.

Substiute Parts

TVB140MSB-L

Littelfuse Inc.In Stock: 953TVB140MSB-L Datasheet

Current PartRFQ

P1500SBLRP

Littelfuse Inc.In Stock: 5411P1500SBLRP Datasheet

DirectRFQ

P1500SALRP

Littelfuse Inc.In Stock: 1347P1500SALRP Datasheet

MFR RecommendedRFQ

TB0720H-13-F

Diodes IncorporatedIn Stock: 6226TB0720H-13-F Datasheet

MFR RecommendedRFQ

TB0720L-13-F

Diodes IncorporatedIn Stock: 4261TB0720L-13-F Datasheet

MFR RecommendedRFQ

TB0720M-13-F

Diodes IncorporatedIn Stock: 25376TB0720M-13-F Datasheet

MFR RecommendedRFQ

TISP4080H3BJR-S

Bourns Inc.In Stock: 26979TISP4080H3BJR-S Datasheet

MFR RecommendedRFQ

TISP4080M3BJR-S

Bourns Inc.In Stock: 25716TISP4080M3BJR-S Datasheet

MFR RecommendedRFQ

TISP5080H3BJR-S

Bourns Inc.In Stock: 1003TISP5080H3BJR-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TVB140MSB-L is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Off State: 140V (exact match required)
• Voltage - Breakover: 180V (exact match required)
• Current - Peak Pulse (8/20µs): 250A minimum
• Package / Case: DO-214AA, SMB (mechanical compatibility)
• Mounting Type: Surface Mount

Secondary Compatibility Factors:

• Voltage - On State: 4V nominal
• Current - Hold (Ih): 150mA
• RoHS3 Compliance

Parts are grouped into two categories:

Category 1 - Direct Voltage & Current Match (140V Off-State, 250A Peak Pulse): These parts maintain identical voltage ratings and peak pulse current specifications, ensuring drop-in compatibility with minimal circuit redesign.

Category 2 - Voltage Derating (65V Off-State): These parts operate at reduced voltage ratings and are suitable only for applications where the circuit voltage is 65V or lower. They are not interchangeable with the original 140V specification without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (140V Off-State Applications):

P1500SBLRP is the primary direct substitute. It maintains identical voltage ratings (140V off-state, 180V breakover) and peak pulse current (250A at 8/20µs), with active product status and ROHS3 compliance. The increased capacitance (55pF vs. 25pF) may require circuit evaluation in timing-sensitive applications.

P1500SALRP is a secondary option from the same manufacturer series. It maintains voltage compatibility but reduces peak pulse current to 150A, suitable only for applications with lower transient current requirements.

For Voltage-Reduced Applications (65V Off-State Maximum):

TB0720M-13-F from Diodes Incorporated provides 250A peak pulse current at 65V off-state, matching the original part's current handling within a lower voltage envelope. ROHS3 compliant and active status.

TISP4080H3BJR-S from Bourns Inc. delivers 300A peak pulse current at 65V off-state with active product status. REACH status is affected; verify compliance requirements for your application.

All substitute parts are housed in DO-214AA (SMB) surface mount packages and maintain 150mA hold current specifications.

Frequently Asked Questions (FAQ)

Q: Can P1500SBLRP replace TVB140MSB-L directly in my circuit?

A: Yes, P1500SBLRP is a direct substitute. Both parts share identical voltage ratings (140V off-state, 180V breakover) and peak pulse current (250A at 8/20µs). The capacitance difference (55pF vs. 25pF) should be evaluated if your circuit has strict timing or frequency response requirements.

Q: Why are the Diodes Incorporated and Bourns parts listed as alternatives if they have different voltage ratings?

A: These parts operate at 65V off-state, which is lower than the original 140V specification. They are suitable only for applications where the protected circuit voltage does not exceed 65V. They cannot be used as direct replacements in 140V systems without circuit redesign.

Q: What is the difference between P1500SBLRP and P1500SALRP?

A: Both maintain 140V voltage compatibility. P1500SBLRP handles 250A peak pulse current (matching the original), while P1500SALRP is rated for 150A. Select P1500SALRP only if your application requires lower transient current protection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant. TISP4080H3BJR-S and TISP4080M3BJR-S have affected REACH status; verify compliance with your regulatory requirements before selection.

Q: Can I use TB0720M-13-F in a 140V circuit?

A: No. TB0720M-13-F is rated for 65V off-state operation. Using it in a 140V circuit will exceed its voltage rating and cause device failure. This part is suitable only for circuits operating at 65V or lower.

Q: What packaging format is used for all these parts?

A: All parts use DO-214AA (SMB) surface mount packaging, ensuring mechanical compatibility with the original TVB140MSB-L footprint.