SMBJ12A-HRA Equivalent & Substitute Parts

Part Overview

The SMBJ12A-HRA is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 12V reverse standoff voltage and 19.9V maximum clamping voltage. The part is Active status and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing preferences while maintaining identical functional specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	12	V
Voltage - Breakdown (Min)	13.3	V
Voltage - Clamping (Max) @ Ipp	19.9	V
Current - Peak Pulse (10/1000µs)	30.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ12A-HRA are qualified based on the following criteria:

Electrical Parameters (Must Match):

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
Unidirectional Channels: 1
Applications: General Purpose

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case: DO-214AA or DO-214AC (SMB/SMA variants)

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Operating Temperature Range (Acceptable Variation):

Minimum acceptable: -55°C to 150°C or wider
Main part specification: -65°C to 150°C

All identified substitute parts meet these criteria and are Active status products from qualified manufacturers.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package / Case	Operating Temperature	RoHS Status	Product Status
SMBJ12A-HRA	Littelfuse Inc.	12V	19.9V	30.2A	600W	DO-214AA, SMB	-65 to 150°C	ROHS3 Compliant	Active
SMBJ12A	EVVO Semi	12V	19.9V	30.2A	600W	DO-214AC, SMA	-65 to 150°C	ROHS3 Compliant	Active
SMBJ12A-13-F	Diodes Incorporated	12V	19.9V	30.2A	600W	DO-214AA, SMB	-55 to 150°C	ROHS3 Compliant	Active
SMBJ12A-E3/52	Vishay General Semiconductor - Diodes Division	12V	19.9V	30.2A	600W	DO-214AA, SMB	-55 to 150°C	ROHS3 Compliant	Active
SMBJ12A-TP	Micro Commercial Co	12V	19.9V	30.2A	600W	DO-214AA, SMB	-55 to 175°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

All substitute parts listed maintain identical electrical specifications and are Active status products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings.

Package Compatibility:

SMBJ12A-HRA, SMBJ12A-13-F, SMBJ12A-E3/52, and SMBJ12A-TP utilize DO-214AA (SMB) packaging and are mechanically interchangeable.
SMBJ12A (EVVO Semi) uses DO-214AC (SMA) packaging, which is a variant of the SMB family. Verify PCB footprint compatibility before selection.

Operating Temperature Considerations:

SMBJ12A-HRA and SMBJ12A (EVVO Semi) support -65°C minimum operating temperature.
SMBJ12A-13-F and SMBJ12A-E3/52 support -55°C minimum operating temperature.
SMBJ12A-TP supports -55°C to 175°C, providing extended high-temperature capability.

Manufacturer Availability:

All parts are Active status with current inventory availability.
Selection may be based on supply chain requirements, lead time, or preferred supplier relationships.

Frequently Asked Questions (FAQ)

Q: Can SMBJ12A (EVVO Semi) with DO-214AC (SMA) package substitute for SMBJ12A-HRA with DO-214AA (SMB) package?

A: Electrical specifications are identical. However, DO-214AC (SMA) and DO-214AA (SMB) are distinct package variants. Substitution requires verification that the PCB footprint accommodates the SMA package dimensions. Consult package datasheets for mechanical compatibility.

Q: What is the difference between SMBJ12A-HRA and SMBJ12A-TP?

A: Both parts share identical electrical specifications (12V standoff, 19.9V clamping, 30.2A peak pulse, 600W peak power) and DO-214AA (SMB) packaging. The primary difference is operating temperature range: SMBJ12A-HRA operates -65 to 150°C, while SMBJ12A-TP operates -55 to 175°C. SMBJ12A-TP is suitable for applications requiring extended high-temperature performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of SMBJ12A-HRA.

Q: Which substitute part has the widest operating temperature range?

A: SMBJ12A-TP (Micro Commercial Co) supports -55 to 175°C, providing the widest high-temperature capability among the listed substitutes.

Q: Can I use SMBJ12A-13-F or SMBJ12A-E3/52 if my application requires -65°C minimum temperature?

A: No. SMBJ12A-13-F and SMBJ12A-E3/52 specify -55°C minimum operating temperature. For applications requiring -65°C operation, use SMBJ12A-HRA or SMBJ12A (EVVO Semi).

Q: What does the part number suffix indicate (e.g., -HRA, -13-F, -E3/52, -TP)?

A: Suffixes denote manufacturer-specific packaging, tape configuration, or variant designations. They do not affect electrical performance for parts with identical core specifications. Consult individual manufacturer datasheets for specific suffix meanings.

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