SMBJ22CHE3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ22CHE3/52 is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AA (SMB) surface mount package. This component is designed for transient voltage protection applications with a 22V reverse standoff voltage and 39.4V maximum clamping voltage at peak pulse current. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ22CHE3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	24.4V
Voltage - Clamping (Max) @ Ipp	39.4V
Current - Peak Pulse (10/1000µs)	15.2A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the SMBJ22CHE3/52 are qualified based on the following critical parameters:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 24.4V
Bidirectional Channels: 1
Type: Zener
Power - Peak Pulse: 600W

Mechanical Parameters (Must Match):

Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Compliance Parameters (Must Match):

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

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A - Direct Electrical Match (39.4V Clamping):

SMBJ22CE3/TR13 (Microchip Technology): Matches all electrical specifications including 39.4V clamping voltage and 15.2A peak pulse current. Active product status with extended operating temperature range (-65°C ~ 150°C).

Group B - Acceptable Electrical Variation (35.5V Clamping):

1SMB22CA TR13 PBFREE (Central Semiconductor Corp)
SMBJ22CA (MDD)
SMBJ22CA-13-F (Diodes Incorporated)
SMBJ22CA-HR (Littelfuse Inc.)
SMBJ22CA-HRA (Littelfuse Inc.)
SMBJ22CA-TR (STMicroelectronics)
SMBJ22CAE3/TR13 (Microchip Technology)

These parts maintain the same 22V reverse standoff voltage and 24.4V breakdown voltage but feature a lower maximum clamping voltage of 35.5V with peak pulse currents ranging from 16.9A to 17.7A. All maintain 600W peak pulse power rating and comply with RoHS3 and MSL requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status
SMBJ22CHE3/52	Vishay General Semiconductor - Diodes Division	22V	24.4V	39.4V	15.2A	600W	-55°C ~ 150°C	Obsolete
SMBJ22CE3/TR13	Microchip Technology	22V	24.4V	39.4V	15.2A	600W	-65°C ~ 150°C	Active
1SMB22CA TR13 PBFREE	Central Semiconductor Corp	22V	24.4V	35.5V	16.9A	600W	-65°C ~ 150°C	Active
SMBJ22CA	MDD	22V	24.4V	35.5V	16.9A	600W	-50°C ~ 150°C	Active
SMBJ22CA-13-F	Diodes Incorporated	22V	24.4V	35.5V	16.9A	600W	-55°C ~ 150°C	Active
SMBJ22CA-HR	Littelfuse Inc.	22V	24.4V	35.5V	16.9A	600W	-65°C ~ 150°C	Active
SMBJ22CA-HRA	Littelfuse Inc.	22V	24.4V	35.5V	16.9A	600W	-65°C ~ 150°C	Active
SMBJ22CA-TR	STMicroelectronics	22V	24.4V	35.5V	17.7A	600W	-55°C ~ 150°C	Active
SMBJ22CAE3/TR13	Microchip Technology	22V	24.4V	35.5V	16.9A	600W	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: SMBJ22CE3/TR13 (Microchip Technology) is the optimal substitute for the obsolete SMBJ22CHE3/52. This part maintains identical electrical specifications including the 39.4V clamping voltage and 15.2A peak pulse current. The part is in active production status with extended operating temperature range (-65°C to 150°C) compared to the original (-55°C to 150°C). All compliance certifications including RoHS3 and MSL Level 1 are maintained.

Secondary Recommendations - Acceptable Substitutes: When the 39.4V clamping voltage specification cannot be relaxed, SMBJ22CE3/TR13 remains the only viable option. However, if circuit design permits operation with a lower clamping voltage of 35.5V, the following active parts provide equivalent protection with enhanced peak pulse current handling:

SMBJ22CA-HR or SMBJ22CA-HRA (Littelfuse Inc.) for automotive-grade applications requiring extended temperature range (-65°C to 150°C)
SMBJ22CA-TR (STMicroelectronics) for applications requiring the highest peak pulse current (17.7A)
1SMB22CA TR13 PBFREE (Central Semiconductor Corp) or SMBJ22CAE3/TR13 (Microchip Technology) for extended temperature range (-65°C to 150°C)

All substitute parts maintain the DO-214AA (SMB) surface mount package, single bidirectional channel configuration, and full RoHS3 compliance required for the original application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ22CA parts with 35.5V clamping voltage replace the SMBJ22CHE3/52 with 39.4V clamping voltage?

A: SMBJ22CA variants are electrically compatible for transient voltage suppression at the 22V reverse standoff level. The lower clamping voltage (35.5V vs 39.4V) results in faster voltage suppression but requires circuit-level validation to confirm the lower clamp voltage does not exceed downstream component ratings. Both maintain identical reverse standoff voltage (22V), breakdown voltage (24.4V), and power dissipation (600W).

Q: Are all substitute parts available in the same DO-214AA (SMB) package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package with identical footprint and pinout. Packaging format varies (Tape & Reel, Cut Tape, Digi-Reel) but does not affect component compatibility or PCB assembly.

Q: What is the temperature range difference between the original part and substitutes?

A: The original SMBJ22CHE3/52 operates from -55°C to 150°C. Several active substitutes extend the lower temperature limit to -65°C, including SMBJ22CE3/TR13, 1SMB22CA TR13 PBFREE, SMBJ22CA-HR, SMBJ22CA-HRA, and SMBJ22CAE3/TR13. The SMBJ22CA (MDD) variant operates from -50°C to 150°C. All maintain the 150°C upper limit.

Q: Do all substitute parts meet RoHS3 and MSL Level 1 requirements?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ22CHE3/52 specifications.

Q: What is the difference between SMBJ22CA-HR and SMBJ22CA-HRA?

A: Both Littelfuse parts (SMBJ22CA-HR and SMBJ22CA-HRA) share identical electrical specifications: 22V reverse standoff, 24.4V breakdown, 35.5V clamping, 16.9A peak pulse current, and -65°C to 150°C operating temperature. The suffix designations indicate different internal construction or qualification levels but do not affect electrical performance or package compatibility.

Q: Which substitute offers the highest peak pulse current capability?

A: SMBJ22CA-TR (STMicroelectronics) provides the highest peak pulse current at 17.7A compared to 15.2A for the original part and 16.9A for most other substitutes. This enhanced current handling maintains the same 600W peak pulse power rating and 35.5V clamping voltage.

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