TSMBJ0306C Equivalent & Substitute Parts

Part Overview

The TSMBJ0306C is a 75V off-state, 150A peak pulse (8/20µs) transient voltage suppressor thyristor manufactured by Micro Commercial Co in DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the same voltage suppression characteristics and package form factor while offering active product status and improved compliance certifications.

Substiute Parts

TSMBJ0306C

Micro Commercial CoIn Stock: 905TSMBJ0306C Datasheet

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P0900SALRP

Littelfuse Inc.In Stock: 30417P0900SALRP Datasheet

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P0900SBLRP

Littelfuse Inc.In Stock: 2244P0900SBLRP Datasheet

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P0900SCLRP

LittelfuseIn Stock: 3925P0900SCLRP Datasheet

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P0900SCMCLRP

Littelfuse Inc.In Stock: 2997P0900SCMCLRP Datasheet

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SMTPA68

STMicroelectronicsIn Stock: 25363SMTPA68 Datasheet

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TISP4095H3BJR-S

Bourns Inc.In Stock: 1056TISP4095H3BJR-S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters that must remain constant or compatible:

• Voltage - Off State: 75V (primary suppression voltage)
• Package / Case: DO-214AA, SMB (mechanical and thermal compatibility)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Number of Elements: 1 (functional equivalence)

Substitute parts are grouped by current handling capability (peak pulse 8/20µs rating), as this parameter determines application suitability while maintaining the same voltage suppression threshold and package form factor.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (150A Rating): P0900SALRP is the primary direct substitute for TSMBJ0306C. Both parts maintain identical off-state voltage (75V), breakover voltage (98V), and peak pulse current rating (150A) in the same DO-214AA package. P0900SALRP is manufactured by Littelfuse Inc., carries active product status, and meets ROHS3 compliance requirements, addressing the obsolescence and compliance limitations of the original part.

Higher Current Capacity Alternatives: P0900SBLRP (250A), P0900SCLRP (400A), P0900SCMCLRP (400A), and TISP4095H3BJR-S (300A) maintain the 75V off-state voltage and DO-214AA package while providing increased peak pulse current handling. These parts are suitable for applications requiring higher transient energy absorption within the same voltage suppression window.

Lower Voltage Alternative: SMTPA68 operates at 68V off-state voltage with 90V breakover voltage, representing a lower voltage suppression threshold. This part is suitable only for applications where the reduced voltage rating is acceptable and provides equivalent 150A peak pulse current capacity.

Compliance Status: All substitute parts listed carry ROHS3 compliance certification, addressing regulatory requirements not met by the obsolete TSMBJ0306C. Product status for all substitutes is active, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can P0900SALRP directly replace TSMBJ0306C without circuit modification? A: Yes. P0900SALRP maintains identical voltage suppression parameters (75V off-state, 98V breakover) and peak pulse current rating (150A) in the same DO-214AA package, enabling direct substitution.

Q: What is the difference between the 150A, 250A, 400A rated substitutes? A: These parts differ only in peak pulse current handling capacity (8/20µs rating). All maintain the same 75V off-state voltage and DO-214AA package. Selection depends on the transient energy levels present in the application circuit.

Q: Why is SMTPA68 listed as a substitute if it has 68V instead of 75V? A: SMTPA68 operates at a lower voltage suppression threshold (68V off-state, 90V breakover). It is included as a substitute option for applications where this reduced voltage rating is functionally acceptable and provides equivalent current handling at 150A peak pulse.

Q: Are all substitute parts available in the same packaging options? A: All substitute parts use DO-214AA (SMB) surface mount package. Packaging format (bulk or tape & reel) varies by manufacturer and part number; verify specific packaging requirements with supplier documentation.

Q: What compliance certifications apply to substitute parts? A: All listed substitute parts meet ROHS3 compliance requirements. REACH status is unaffected for all parts except TISP4095H3BJR-S, which is REACH affected. Verify specific regulatory requirements for your application region.

Q: Can higher-rated current parts (250A, 300A, 400A) be used in place of the 150A original? A: Yes, higher current-rated parts are backward compatible in applications designed for 150A or lower transient currents. The higher rating provides additional margin for transient energy absorption without affecting voltage suppression characteristics.