TSMBJ0307C Equivalent & Substitute Parts

Part Overview

The TSMBJ0307C is a 90V off-state transient voltage suppressor (TVS) thyristor manufactured by Micro Commercial Co, rated for 150A peak pulse current in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

TVS thyristors in this voltage class are used for transient overvoltage protection in industrial and consumer applications. Substitutes must maintain the 90V off-state voltage rating and DO-214AA package while accommodating variations in peak pulse current handling and on-state voltage characteristics.

Substiute Parts

TSMBJ0307C

Micro Commercial CoIn Stock: 1186TSMBJ0307C Datasheet

Current PartRFQ

TB1100M-13-F

Diodes IncorporatedIn Stock: 1114TB1100M-13-F Datasheet

DirectRFQ

P1100SALRP

Littelfuse Inc.In Stock: 4335P1100SALRP Datasheet

SimilarRFQ

P1100SBLRP

Littelfuse Inc.In Stock: 52858P1100SBLRP Datasheet

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P1100SCLRP

Littelfuse Inc.In Stock: 2762P1100SCLRP Datasheet

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P1100SCMCLRP

LittelfuseIn Stock: 1257P1100SCMCLRP Datasheet

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SMP100LC-90

STMicroelectronicsIn Stock: 1946SMP100LC-90 Datasheet

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SMTPA100

STMicroelectronicsIn Stock: 2380SMTPA100 Datasheet

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TISP4115H3BJR-S

Bourns Inc.In Stock: 4551TISP4115H3BJR-S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the TSMBJ0307C is determined by the following mandatory parameters:

• Voltage - Off State: Must be 90V (primary substitution criterion)
• Voltage - Breakover: Must be within the 115V–130V range
• Package / Case: Must be DO-214AA, SMB (surface mount compatibility)
• Current - Hold (Ih): Must be 150mA (thyristor latching requirement)
• Mounting Type: Must be Surface Mount

Secondary parameters that may vary within acceptable design margins:

• Current - Peak Pulse (8/20µs): Rated at 150A or higher (equal or superior current handling)
• Voltage - On State: Acceptable range 3V–5V (forward voltage drop)
• Capacitance: Acceptable range 50pF–120pF (parasitic capacitance)

Parts that meet the mandatory criteria are classified as direct substitutes. Parts that exceed the 150A peak pulse rating are classified as superior substitutes with enhanced transient protection capability.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Equivalent Current Rating)

P1100SALRP (Littelfuse Inc.) is the primary direct substitute. It maintains the 150A peak pulse (8/20µs) rating, 90V off-state voltage, and 150mA hold current. The part is active and ROHS3 compliant, addressing the obsolescence and compliance limitations of the TSMBJ0307C. On-state voltage is 4V versus 5V on the original part, representing a minor improvement in forward voltage characteristics.

Superior Substitutes (Enhanced Current Rating)

TB1100M-13-F (Diodes Incorporated), P1100SBLRP (Littelfuse Inc.), P1100SCLRP (Littelfuse Inc.), P1100SCMCLRP (Littelfuse), SMP100LC-90 (STMicroelectronics), and TISP4115H3BJR-S (Bourns Inc.) all provide peak pulse current ratings of 250A or higher. These parts are suitable for applications requiring enhanced transient protection margin. All are active products with ROHS3 compliance.

Not Recommended

SMTPA100 (STMicroelectronics) operates at 100V off-state voltage, exceeding the 90V specification of the TSMBJ0307C. This voltage mismatch disqualifies it as a substitute for circuits designed around the 90V protection threshold.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher peak pulse current rating?

A: Yes. Parts rated for 250A, 300A, or 400A peak pulse current are direct substitutes for the 150A-rated TSMBJ0307C. Higher current ratings provide superior transient protection without affecting circuit compatibility, provided all other parameters (90V off-state voltage, 150mA hold current, DO-214AA package) remain unchanged.

Q: What is the difference between the 8/20µs and 10/1000µs pulse specifications?

A: These represent different transient waveform profiles. The 8/20µs pulse simulates fast transients (lightning, ESD), while 10/1000µs simulates slower surge events. Substitute parts may have different ratings for each waveform. Both specifications must be evaluated for your specific application environment.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts are ROHS3 compliant. The original TSMBJ0307C is RoHS non-compliant. Compliance is mandatory for new designs and procurement in regulated markets.

Q: Does on-state voltage variation affect circuit performance?

A: On-state voltage (3V–5V range) represents the forward voltage drop during thyristor conduction. Variations within this range have minimal impact on transient suppression performance. Selection should prioritize matching the 90V off-state voltage and current rating over on-state voltage.

Q: Can I substitute SMTPA100 for TSMBJ0307C?

A: No. SMTPA100 is rated for 100V off-state voltage, not 90V. Using a 100V part in a circuit designed for 90V protection will alter the transient suppression threshold and is not recommended.

Q: What packaging options are available for substitutes?

A: All substitute parts use the DO-214AA (SMB) surface mount package, maintaining mechanical and electrical compatibility with the original TSMBJ0307C footprint. Packaging variants (Tape & Reel, Cut Tape, Digi-Reel) affect procurement and handling but not circuit performance.