SMBJ30A-TP-HF Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMBJ30A-TP-HF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose interface protection applications. This surface-mount component operates in the DO-214AA (SMB) package and provides clamping protection at 48.4V with a peak pulse current rating of 12.4A. The part is currently active in production with 681 units in stock.

Equivalent and substitute parts are identified based on matching electrical characteristics (reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current) and mechanical compatibility (surface-mount DO-214AA/SMB package). Substitutes enable design flexibility, supply chain continuity, and alternative sourcing options while maintaining circuit protection performance.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30	V
Voltage - Breakdown (Min)	33.3	V
Voltage - Clamping (Max) @ Ipp	48.4	V
Current - Peak Pulse (10/1000µs)	12.4	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ30A-TP-HF are classified into two functional groups based on electrical performance and application suitability:

Group 1: Direct Electrical Equivalents (12.4A Peak Pulse Current) These parts maintain identical peak pulse current (12.4A) and clamping voltage (48.4V) specifications, ensuring drop-in compatibility for circuits designed around the SMBJ30A-TP-HF performance envelope. All parts in this group share the same reverse standoff voltage (30V), breakdown voltage (33.3V minimum), and power dissipation (600W peak pulse).

Group 2: Higher Current Capability (20.7A Peak Pulse Current) These parts provide increased peak pulse current handling (20.7A) and higher power dissipation (1000W), while maintaining identical voltage parameters (30V standoff, 33.3V breakdown, 48.4V clamping). These substitutes are suitable for applications requiring enhanced transient energy absorption without voltage characteristic changes.

Critical Substitution Parameters:

Reverse Standoff Voltage: 30V (all substitutes)
Breakdown Voltage (Min): 33.3V (all substitutes)
Clamping Voltage @ Ipp: 48.4V (all substitutes)
Package: DO-214AA / SMB (all substitutes)
Mounting: Surface Mount (all substitutes)
Type: Zener, Unidirectional (all substitutes)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Power Peak Pulse (W)	Temp Range (°C)	Product Status
SMBJ30A-TP-HF	Micro Commercial Co	30	33.3	48.4	12.4	600	-55 to 175	Active
SACB30	Littelfuse Inc.	30	33.3	48.6	10	500	-55 to 150	Active
SMB10J30A R5G	Taiwan Semiconductor Corporation	30	33.3	48.4	20.7	1000	-55 to 175	Discontinued at DiGi Electronics
SMB10J30A-E3/52	Vishay General Semiconductor - Diodes Division	30	33.3	48.4	20.7	1000	-55 to 150	Active
SMB10J30AHR5G	Taiwan Semiconductor Corporation	30	33.3	48.4	20.7	1000	-55 to 175	Discontinued at DiGi Electronics
SMBJ30A R5G	Taiwan Semiconductor Corporation	30	33.3	48.4	13	600	-55 to 150	Discontinued at DiGi Electronics
SMBJ30A-13-F	Diodes Incorporated	30	33.3	48.4	12.4	600	-55 to 150	Active
SMBJ30A-E3/52	Vishay General Semiconductor - Diodes Division	30	33.3	48.4	12.4	600	-55 to 150	Active
SMBJ30A-E3/5B	Vishay General Semiconductor - Diodes Division	30	33.3	48.4	12.4	600	-55 to 150	Active
SMBJ30A-M3/52	Vishay General Semiconductor - Diodes Division	30	33.3	48.4	12.4	600	-55 to 150	Active
SMBJ30A-Q	Bourns Inc.	30	33.3	48.4	12.4	600	-55 to 150	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

SMBJ30A-13-F (Diodes Incorporated), SMBJ30A-E3/52 (Vishay), SMBJ30A-E3/5B (Vishay), SMBJ30A-M3/52 (Vishay), and SMBJ30A-Q (Bourns Inc.) are recommended as primary substitutes. These parts maintain identical electrical specifications (12.4A peak pulse current, 48.4V clamping voltage, 600W power dissipation) and are currently in active production status. All are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Operating temperature range is -55°C to 150°C, which covers most general-purpose applications; designs requiring the full -55°C to 175°C range of the SMBJ30A-TP-HF should verify thermal requirements.

Secondary Substitutes (Higher Current Capability)

SMB10J30A-E3/52 (Vishay) is an active substitute offering increased peak pulse current (20.7A) and power dissipation (1000W) while maintaining voltage parameters. This part is suitable for applications requiring enhanced transient protection margin. Operating temperature range is -55°C to 150°C. Taiwan Semiconductor Corporation variants (SMB10J30A R5G, SMB10J30AHR5G) provide equivalent electrical performance but are discontinued at DiGi Electronics and should not be selected for new designs.

Lower Current Alternative

SACB30 (Littelfuse Inc.) provides a lower current option (10A peak pulse) with slightly higher clamping voltage (48.6V) and reduced power dissipation (500W). This substitute is suitable only for applications with lower transient energy requirements. Operating temperature range is -55°C to 150°C.

Compliance and Certification

All recommended substitutes are RoHS3 compliant and REACH unaffected. SMBJ30A-Q (Bourns) carries AEC-Q101 automotive qualification and is designated for automotive-grade applications. Taiwan Semiconductor Corporation parts (SMB10J30AHR5G) also carry AEC-Q101 qualification but are discontinued and unsuitable for new designs.

Frequently Asked Questions (FAQ)

Q1: Can SACB30 be used as a direct replacement for SMBJ30A-TP-HF?

SACB30 shares the same reverse standoff voltage (30V) and breakdown voltage (33.3V) but differs in peak pulse current (10A vs. 12.4A) and clamping voltage (48.6V vs. 48.4V). It is suitable only for applications with lower transient energy requirements. Verify circuit protection requirements before substitution.

Q2: What is the difference between the 12.4A and 20.7A peak pulse current variants?

The 12.4A variants (SMBJ30A series) and 20.7A variants (SMB10J30A series) maintain identical voltage characteristics (30V standoff, 33.3V breakdown, 48.4V clamping) but differ in transient energy absorption capability. The 20.7A variants provide 1000W peak pulse power dissipation versus 600W for 12.4A variants. Select based on circuit transient energy levels.

Q3: Are there temperature range differences between substitutes?

The SMBJ30A-TP-HF operates from -55°C to 175°C. Most active substitutes (Vishay, Diodes, Bourns) operate from -55°C to 150°C. Taiwan Semiconductor variants operate to 175°C but are discontinued. For applications requiring full -55°C to 175°C operation, verify substitute thermal specifications against design requirements.

Q4: Which substitutes are recommended for new designs?

SMBJ30A-13-F (Diodes Incorporated), SMBJ30A-E3/52, SMBJ30A-E3/5B, and SMBJ30A-M3/52 (all Vishay), and SMBJ30A-Q (Bourns) are active production parts suitable for new designs. All are RoHS3 compliant with unlimited moisture sensitivity rating. SMBJ30A-Q carries AEC-Q101 automotive qualification for automotive applications.

Q5: Can discontinued parts be used as substitutes?

Taiwan Semiconductor Corporation variants (SMB10J30A R5G, SMB10J30AHR5G, SMBJ30A R5G) are discontinued at DiGi Electronics and should not be selected for new designs. Use only active production substitutes to ensure long-term supply chain availability.

Q6: What packaging options are available for substitutes?

All substitutes use DO-214AA (SMB) surface-mount package. Packaging formats vary: Tape & Reel (TR), Cut Tape (CT), and Cut Tape & Digi-Reel combinations. Verify packaging format compatibility with assembly equipment and procurement requirements.

Q7: Are all substitutes RoHS3 compliant?

All listed substitutes are RoHS3 compliant. Moisture sensitivity level (MSL) is 1 (Unlimited) for all active production parts, indicating no moisture sensitivity restrictions for storage and handling.

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