SMBJ12CAHE3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ12CAHE3/52 is a 12V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode is designed for surface mount applications in the DO-214AA (SMB) package and provides transient overvoltage protection with a 19.9V maximum clamping voltage and 30.2A peak pulse current capability. The part is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring 12V TVS protection.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	12V
Voltage - Breakdown (Min)	13.3V
Voltage - Clamping (Max) @ Ipp	19.9V
Current - Peak Pulse (10/1000µs)	30.2A
Power - Peak Pulse	600W
Type	Zener
Bidirectional Channels	1
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ12CAHE3/52 is determined by strict electrical and mechanical parameter matching:

Critical Substitution Parameters:

Voltage - Reverse Standoff: 12V (exact match required)
Voltage - Clamping (Max) @ Ipp: 19.9V (exact match required)
Current - Peak Pulse (10/1000µs): 30.2A nominal (30.15A acceptable within tolerance)
Power - Peak Pulse: 600W (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Zener, Bidirectional (exact match required)

All substitute parts listed maintain identical electrical performance specifications and physical package compatibility. Variations in manufacturer, product status, packaging format (Cut Tape, Tape & Reel), and operating temperature range do not affect functional substitutability within the specified electrical parameters.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Breakdown Min (V)	Voltage Clamping Max (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Product Status	Operating Temp (°C)
SMBJ12CAHE3/52	Vishay	12	13.3	19.9	30.2	600	DO-214AA, SMB	Discontinued	-55 ~ 150
SMBJ12CA-E3/52	Vishay	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-55 ~ 150
SMBJ12CA-M3/52	Vishay	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-55 ~ 150
SMBJ12CA-M3/5B	Vishay	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-55 ~ 150
1SMB12CA TR13 PBFREE	Central Semiconductor Corp	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-65 ~ 150
SMBJ12CA-13-F	Diodes Incorporated	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-55 ~ 150
SMBJ12CA-HR	Littelfuse	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-65 ~ 150
SMBJ12CA-HRA	Littelfuse Inc.	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-65 ~ 150
SMBJ12CA-TP	Micro Commercial Co	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-55 ~ 175
SMBJ12CAE3/TR13	Microchip Technology	12	13.3	19.9	30.2	600	DO-214AA, SMB	Active	-65 ~ 150
TV06B120JB-G	Comchip Technology	12	13.3	19.9	30.15	600	DO-214AA, SMB	Active	Not specified

Engineering Selection Recommendations

Primary Recommendation: SMBJ12CA-E3/52 (Vishay) - Direct manufacturer equivalent with identical electrical specifications, active product status, and equivalent packaging format. Maintains design continuity with the original part.

Secondary Recommendations (Multi-Source Strategy):

SMBJ12CA-TP (Micro Commercial Co) - Active status with extended upper operating temperature limit to 175°C, providing thermal margin for high-ambient applications. Identical electrical performance and package compatibility.

SMBJ12CA-13-F (Diodes Incorporated) - Active status with established supply availability. Meets all electrical and mechanical requirements with full ROHS3 compliance.

SMBJ12CA-HR / SMBJ12CA-HRA (Littelfuse) - Active status with extended lower operating temperature to -65°C. SMBJ-HR and SMBJ-HRA series designations indicate automotive-grade reliability. Suitable for temperature-critical applications.

SMBJ12CAE3/TR13 (Microchip Technology) - Active status with extended lower operating temperature to -65°C. Established supply chain presence.

1SMB12CA TR13 PBFREE (Central Semiconductor Corp) - Active status with extended lower operating temperature to -65°C. Lead-free construction explicitly designated.

TV06B120JB-G (Comchip Technology) - Active status with peak pulse current specification of 30.15A, within acceptable tolerance of 30.2A nominal. Identical electrical performance and package compatibility.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status. Selection should prioritize active product status and established supply chain availability for production continuity.

Frequently Asked Questions (FAQ)

Q: Can SMBJ12CA-TP be used as a direct replacement for SMBJ12CAHE3/52?

A: Yes. SMBJ12CA-TP meets all critical electrical parameters: 12V reverse standoff voltage, 19.9V maximum clamping voltage, 30.2A peak pulse current, and 600W peak pulse power. Both use DO-214AA SMB package. The extended operating temperature range (-55°C to 175°C) of SMBJ12CA-TP provides additional thermal capability without affecting functional compatibility.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging formats?

A: Tape & Reel and Cut Tape are packaging and delivery formats only. They do not affect the electrical performance or physical dimensions of the component itself. Selection between these formats depends on assembly equipment compatibility and production volume requirements, not on circuit functionality.

Q: Are Littelfuse SMBJ12CA-HR and SMBJ12CA-HRA interchangeable?

A: Yes. Both parts maintain identical electrical specifications (12V standoff, 19.9V clamping, 30.2A peak pulse current, 600W power). The HR and HRA designations indicate different product series within Littelfuse's automotive-grade TVS line. Both are functionally equivalent for the specified application.

Q: Why does TV06B120JB-G show 30.15A peak pulse current instead of 30.2A?

A: The 30.15A specification for TV06B120JB-G falls within the acceptable tolerance band for 30.2A nominal peak pulse current. This minor variation does not affect functional substitutability, as the clamping voltage (19.9V) and all other critical parameters remain identical.

Q: Can I use a substitute part with a lower operating temperature range?

A: Operating temperature range does not affect substitutability. All listed parts operate within -55°C to 150°C minimum range, which covers standard industrial and automotive applications. Parts with extended ranges (such as -65°C lower limit) provide additional capability but are not required for standard applications.

Q: Is the SMBJ12CAHE3/52 still available from other suppliers?

A: The SMBJ12CAHE3/52 is discontinued at DiGi Electronics. All listed substitute parts are active products with current inventory availability from multiple suppliers, ensuring reliable supply chain access for new designs and production continuity.

Q: Do all substitute parts have the same RoHS and REACH compliance status?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the original SMBJ12CAHE3/52 specifications. MSL 1 (Unlimited) moisture sensitivity rating is consistent across all parts.

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