SMBJ22C Equivalent & Substitute Parts

Part Overview

The SMBJ22C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 22V reverse standoff voltage with a 37.28V maximum clamping voltage and 16.9A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ22C is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	23.09V
Voltage - Clamping (Max) @ Ipp	37.28V
Current - Peak Pulse (10/1000µs)	16.9A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ22C is determined by strict alignment of electrical and mechanical parameters. The following criteria establish functional equivalence:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 22V (exact match required)
Voltage - Breakdown (Min): 23.09V to 24.4V (acceptable range)
Voltage - Clamping (Max) @ Ipp: 35.5V to 37.28V (acceptable range)
Current - Peak Pulse (10/1000µs): 16.9A minimum
Power - Peak Pulse: 600W minimum
Package / Case: DO-214AA, SMB (exact match required)
Mounting Type: Surface Mount (exact match required)
RoHS Status: ROHS3 Compliant (required)
Moisture Sensitivity Level: 1 (Unlimited) (required)

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct functional replacement in circuit applications designed for the SMBJ22C.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status
SMBJ22C	Littelfuse Inc.	22V	23.09V	37.28V	16.9A	600W	-65°C ~ 150°C	Obsolete
SMBJ22CA	MDD	22V	24.4V	35.5V	16.9A	600W	-50°C ~ 150°C	Active
SMB8J22CA-E3/52	Vishay General Semiconductor - Diodes Division	22V	24.4V	35.5V	22.5A	800W	-55°C ~ 150°C	Active
SMB8J22CA-E3/5B	Vishay General Semiconductor - Diodes Division	22V	24.4V	35.5V	22.5A	800W	-55°C ~ 150°C	Active
SMBJ22CA-13-F	Diodes Incorporated	22V	24.4V	35.5V	16.9A	600W	-55°C ~ 150°C	Active
SMBJ22CA-E3/52	Vishay General Semiconductor - Diodes Division	22V	24.4V	35.5V	16.9A	600W	-55°C ~ 150°C	Active
SMBJ22CA-TP	Micro Commercial Co	22V	24.4V	35.5V	16.9A	600W	-55°C ~ 175°C	Active
SMBJ22CA-TR	STMicroelectronics	22V	24.4V	35.5V	17.7A	600W	-55°C ~ 150°C	Active
TV06B220JB-G	Comchip Technology	22V	24.4V	35.5V	16.9A	600W	Not specified	Active

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and MSL 1 (Unlimited) ratings, ensuring regulatory alignment and manufacturing continuity. The SMBJ22C obsolescence status necessitates transition to one of these active alternatives.

Direct Electrical Equivalents (Matched Specifications): SMBJ22CA-13-F, SMBJ22CA-E3/52, SMBJ22CA-TP, and TV06B220JB-G maintain identical electrical performance to the SMBJ22C with 16.9A peak pulse current and 600W power dissipation. These parts are suitable for direct replacement in existing circuit designs.

Enhanced Performance Alternatives: SMB8J22CA-E3/52 and SMB8J22CA-E3/5B offer increased peak pulse current (22.5A) and power dissipation (800W), providing additional margin in applications subject to higher transient stress. These parts maintain the same voltage specifications and package format.

Temperature Range Considerations: SMBJ22CA-TP extends the upper operating temperature to 175°C, compared to 150°C for most alternatives. This option is applicable for high-temperature environments. SMBJ22CA (MDD) operates at a reduced lower temperature limit of -50°C versus -55°C or -65°C for other options.

Packaging and Availability: All substitute parts are available in DO-214AA (SMB) surface-mount packaging. Packaging variants include Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® options. Inventory levels vary across manufacturers, with MDD SMBJ22CA offering the highest stock position (25,400 pcs).

Frequently Asked Questions (FAQ)

Q: Can SMBJ22CA directly replace SMBJ22C in existing designs? A: Yes. SMBJ22CA maintains the same 22V reverse standoff voltage, 35.5V clamping voltage, 16.9A peak pulse current, and 600W power dissipation. The DO-214AA (SMB) package and surface-mount configuration are identical. The primary difference is product status transition from obsolete to active.

Q: What is the difference between SMBJ22CA and SMB8J22CA variants? A: SMB8J22CA-E3/52 and SMB8J22CA-E3/5B provide enhanced current handling (22.5A versus 16.9A) and power dissipation (800W versus 600W) while maintaining the same voltage specifications. These are suitable for applications requiring additional transient protection margin.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity ratings, meeting current regulatory and manufacturing standards.

Q: Does operating temperature range affect substitution suitability? A: Operating temperature range does not prevent substitution if the application operates within the substitute part's specified range. SMBJ22CA-TP supports -55°C to 175°C, providing the widest high-temperature capability. SMBJ22CA (MDD) operates to -50°C minimum, which is acceptable for most industrial applications.

Q: What packaging options are available for substitute parts? A: Substitute parts are supplied in Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or standard reel configurations. All maintain the DO-214AA (SMB) package format required for surface-mount assembly compatibility.

Q: Can I use TV06B220JB-G as a substitute if operating temperature is not specified? A: TV06B220JB-G is electrically equivalent to SMBJ22C with matching voltage and current specifications. However, the absence of specified operating temperature range in the provided data requires verification with Comchip Technology for temperature-critical applications.

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