TVB140MSC-L Equivalent & Substitute Parts

Part Overview

The TVB140MSC-L is a 140V off-state thyristor transient voltage suppressor (TVS) in DO-214AA surface mount package, manufactured by Littelfuse Inc. under the SiBar series. This component is rated for 300A peak pulse current (8/20µs) and is designed for transient overvoltage protection applications. The product status is obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

TVB140MSC-L

Littelfuse Inc.In Stock: 830TVB140MSC-L Datasheet

Current PartRFQ

P1500SCLRP

Littelfuse Inc.In Stock: 1337P1500SCLRP Datasheet

MFR RecommendedRFQ

SMP100MC-140

STMicroelectronicsIn Stock: 2372SMP100MC-140 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 TVB140MSC-L is determined by the following critical parameters:

Primary Substitution Criteria (140V Off-State Group):

• Voltage - Off State: 140V
• Voltage - Breakover: 180V (±5V tolerance acceptable)
• Voltage - On State: 4V (±0.5V tolerance acceptable)
• Current - Peak Pulse (8/20µs): 300A minimum
• Current - Hold (Ih): 150mA
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Secondary Substitution Criteria (65V Off-State Group):

• Voltage - Off State: 65V
• Voltage - Breakover: 80-88V
• Voltage - On State: 3-4.6V
• Current - Peak Pulse (8/20µs): 150A to 400A
• Current - Hold (Ih): 150mA
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

The 140V off-state parts provide direct functional equivalence. The 65V off-state parts represent alternative voltage protection levels and are listed as cross-references in the original part documentation.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (140V Off-State):

P1500SCLRP (Littelfuse Inc., SIDACtor® series) is the primary active substitute. It maintains 140V off-state voltage, 180V breakover voltage, and 150mA hold current. Peak pulse current is rated at 400A (8/20µs), exceeding the original 300A specification. Product status is active with ROHS3 compliance and unlimited moisture sensitivity level. Packaging is Tape & Reel (TR) in DO-214AA, SMB format.

SMP100MC-140 (STMicroelectronics, TRISIL™ series) provides equivalent performance at 140V off-state with 175V breakover voltage and 300A peak pulse current (8/20µs). Product status is active with ROHS3 compliance. Breakover voltage is 5V lower than the original specification. Packaging is Tape & Reel (TR) in SMB format.

Alternative Voltage Protection (65V Off-State):

TB0720H-13-F, TB0720L-13-F, and TB0720M-13-F (Diodes Incorporated) provide 65V off-state protection with 88V breakover voltage. These parts are active products with ROHS3 compliance and varying peak pulse current ratings (150A, 250A, and 400A respectively). Capacitance values range from 100pF to 200pF.

TISP4080H3BJR-S, TISP4080M3BJR-S, and TISP5080H3BJR-S (Bourns Inc.) provide 65V off-state protection with 80V breakover voltage. These parts are active products with peak pulse current ratings of 220A to 300A (8/20µs). REACH status is affected for Bourns parts. Capacitance values range from 87pF to 345pF.

All substitute parts maintain DO-214AA, SMB surface mount packaging and 150mA hold current specification.

Frequently Asked Questions (FAQ)

Q: Can P1500SCLRP directly replace TVB140MSC-L?

A: Yes. P1500SCLRP maintains identical off-state voltage (140V), breakover voltage (180V), on-state voltage (4V), and hold current (150mA). Peak pulse current is 400A versus the original 300A, providing higher transient protection capability. Package and mounting type are identical. Product status is active.

Q: What is the difference between 140V and 65V off-state parts?

A: Off-state voltage determines the maximum continuous voltage the TVS can withstand without triggering. 140V parts protect circuits operating at higher voltage levels, while 65V parts are for lower voltage applications. Selection depends on the protected circuit's operating voltage range.

Q: Are the Diodes Incorporated TB0720 series parts compatible?

A: TB0720 series parts (TB0720H-13-F, TB0720L-13-F, TB0720M-13-F) share identical 65V off-state voltage and DO-214AA, SMB packaging. They differ in peak pulse current ratings (150A, 250A, 400A respectively) and capacitance values. These are alternative voltage protection options, not direct equivalents to the 140V TVB140MSC-L.

Q: What is the significance of capacitance differences?

A: Capacitance values (60pF to 345pF) affect high-frequency circuit behavior. Lower capacitance reduces parasitic effects in high-speed applications. The original TVB140MSC-L and SMP100MC-140 both specify 60pF, while P1500SCLRP specifies 95pF. Capacitance selection depends on circuit frequency response requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. Bourns parts (TISP4080H3BJR-S, TISP4080M3BJR-S, TISP5080H3BJR-S) have REACH status affected, while Littelfuse and STMicroelectronics parts have REACH status unaffected.

Q: What is the difference between peak pulse current ratings (8/20µs) and (10/1000µs)?

A: These represent different transient waveform profiles. The 8/20µs rating applies to fast transients, while 10/1000µs applies to slower transients. Both ratings are provided for comprehensive transient protection specification. The TVB140MSC-L is rated 300A (8/20µs) and 100A (10/1000µs).

Q: Can I use a higher current-rated part as a substitute?

A: Yes, if all other electrical parameters match. Higher current ratings provide additional transient protection margin. P1500SCLRP (400A) can substitute for TVB140MSC-L (300A) because all voltage parameters are identical and current capacity is higher.