SMBJ22A-HRA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ22A-HRA is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 22V reverse standoff voltage and provides 35.5V maximum clamping voltage at peak pulse current of 16.9A, delivering 600W peak pulse power dissipation in a DO-214AA (SMB) package. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA package form factor.

Substiute Parts

SMBJ22A-HRA

Littelfuse Inc.In Stock: 848SMBJ22A-HRA Datasheet

Current PartRFQ

SMBJ22A

MeritekIn Stock: 2107SMBJ22A Datasheet

DirectRFQ

SMBJ22A

MeritekIn Stock: 2107SMBJ22A Datasheet

DirectRFQ

SMBJ22A-13-F

Diodes IncorporatedIn Stock: 1388SMBJ22A-13-F Datasheet

DirectRFQ

SMBJ22A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 2220SMBJ22A-E3/52 Datasheet

DirectRFQ

SMBJ22A-TP

Micro Commercial CoIn Stock: 2875SMBJ22A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ22A-HRA are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Current - Peak Pulse (10/1000µs): 16.9A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain identical electrical performance specifications and package compatibility. Variations in operating temperature range and packaging format (Tape & Reel vs. Cut Tape) do not affect functional substitution capability within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and mechanical compatibility with the SMBJ22A-HRA. Selection among these alternatives is determined by:

Product Status & Availability: All substitute parts are active in production status with confirmed inventory availability. SMBJ22A-TP (Micro Commercial Co) offers the widest operating temperature range (-55°C ~ 175°C), providing extended thermal performance margin for applications requiring higher temperature operation.

Compliance & Certifications: All substitute parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the original part's regulatory and environmental qualifications.

Packaging Format: SMBJ22A-HRA, SMBJ22A-13-F, SMBJ22A-E3/52, and SMBJ22A-TP are supplied in Tape & Reel (TR) or Cut Tape (CT) formats suitable for automated assembly. The generic SMBJ22A from Meritek does not specify packaging format but maintains identical electrical performance.

Thermal Performance: SMBJ22A-TP extends the upper operating temperature to 175°C compared to 150°C for other alternatives, offering enhanced thermal margin in high-temperature environments while maintaining identical voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can SMBJ22A-TP be used as a direct replacement for SMBJ22A-HRA in all applications?

A: Yes. SMBJ22A-TP is electrically and mechanically equivalent to SMBJ22A-HRA. Both maintain identical voltage standoff (22V), breakdown (24.4V), clamping (35.5V), peak pulse current (16.9A), and power dissipation (600W) specifications. The extended operating temperature range of SMBJ22A-TP (-55°C ~ 175°C vs. -65°C ~ 150°C) provides additional thermal margin without compromising performance at lower temperatures.

Q: What is the difference between SMBJ22A from Meritek and SMBJ22A-HRA from Littelfuse?

A: Both parts are electrically identical with matching voltage and current ratings. The primary difference is the manufacturer and operating temperature range. Meritek's SMBJ22A operates from -55°C to 150°C, while Littelfuse's SMBJ22A-HRA extends to -65°C minimum. For applications requiring operation below -55°C, SMBJ22A-HRA is required.

Q: Are all substitute parts available in the same packaging format as SMBJ22A-HRA?

A: SMBJ22A-HRA is supplied in Tape & Reel (TR) format. SMBJ22A-13-F is available in Cut Tape (CT) & Digi-Reel®, SMBJ22A-E3/52 in Tape & Reel (TR), and SMBJ22A-TP in Tape & Reel (TR). The generic SMBJ22A does not specify packaging format. All parts use the DO-214AA (SMB) package and are compatible with standard surface-mount assembly equipment.

Q: Do all substitute parts meet the same compliance requirements as SMBJ22A-HRA?

A: Yes. All substitute parts carry ROHS3 compliance, REACH Unaffected status, and unlimited moisture sensitivity rating (MSL 1), matching SMBJ22A-HRA's regulatory qualifications. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: What is the minimum operating temperature requirement for selecting between SMBJ22A-HRA and substitute parts?

A: SMBJ22A-HRA operates from -65°C minimum, while all substitute parts (SMBJ22A, SMBJ22A-13-F, SMBJ22A-E3/52, SMBJ22A-TP) operate from -55°C minimum. For applications requiring operation below -55°C, SMBJ22A-HRA is the only qualified option among these parts.

Q: Can SMBJ22A-E3/52 (Vishay TransZorb®) be used interchangeably with SMBJ22A-HRA?

A: Yes. SMBJ22A-E3/52 is electrically and mechanically equivalent to SMBJ22A-HRA. Both maintain identical electrical specifications and DO-214AA package compatibility. The TransZorb® designation is Vishay's product line branding and does not affect functional equivalence.