SMAJ22A-TP Equivalent & Substitute Parts

Part Overview

The SMAJ22A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 22V reverse standoff voltage with a 35.5V maximum clamping voltage and 11.2A peak pulse current capability in a DO-214AC (SMA) package. The part is currently active and in production, with 4063 units available in inventory. Alternative equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements.

Substiute Parts

SMAJ22A-TP

Micro Commercial CoIn Stock: 4117SMAJ22A-TP Datasheet

Current PartRFQ

SMAJ22A

MDDIn Stock: 44967SMAJ22A Datasheet

DirectRFQ

SMAJ22A

MDDIn Stock: 44967SMAJ22A Datasheet

DirectRFQ

SMAJ22A-13-F

Diodes IncorporatedIn Stock: 45171SMAJ22A-13-F Datasheet

DirectRFQ

SM4T26AY

STMicroelectronicsIn Stock: 10776SM4T26AY Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ22A-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents maintain identical electrical performance specifications:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Similar Alternatives share the same reverse standoff voltage and package but differ in clamping voltage and peak pulse current specifications, suitable for applications with higher transient energy requirements.

Parameter Comparison

Engineering Selection Recommendations

SMAJ22A (MDD) and SMAJ22A-13-F (Diodes Incorporated) are direct electrical equivalents to the SMAJ22A-TP. Both maintain identical clamping voltage (35.5V) and comparable peak pulse current specifications (11.3A and 11.2A respectively). All three parts are ROHS3 compliant, carry MSL 1 rating, and are packaged in DO-214AC (SMA) format. Selection between these direct equivalents depends on supplier availability and procurement lead times. The SMAJ22A-13-F from Diodes Incorporated offers the same upper operating temperature limit (-55°C) as the main part, while the MDD variant operates to -50°C.

SM4T26AY (STMicroelectronics) is classified as a similar alternative rather than a direct equivalent. While it maintains the 22V reverse standoff voltage and DO-214AC (SMA) package, it features a higher clamping voltage (48.3V) and significantly higher peak pulse current (48A at 8/20µs pulse width). This part is qualified to AEC-Q101 automotive standards and carries the TRANSIL™ series designation. Selection of SM4T26AY is appropriate only for applications requiring enhanced transient suppression capability beyond the 35.5V clamping specification of the main part.

Frequently Asked Questions (FAQ)

Q: Can SMAJ22A (MDD) be used as a direct replacement for SMAJ22A-TP?

A: Yes. Both parts share identical electrical specifications: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, and 400W peak pulse power rating. Both are packaged in DO-214AC (SMA) format, ROHS3 compliant, and carry MSL 1 rating. The primary difference is the operating temperature range: SMAJ22A-TP operates to 175°C (TA), while SMAJ22A (MDD) operates to 150°C (TJ). Verify application temperature requirements before selection.

Q: What is the difference between SMAJ22A-13-F and SMAJ22A-TP?

A: SMAJ22A-13-F from Diodes Incorporated is electrically equivalent to SMAJ22A-TP with identical clamping voltage (35.5V) and peak pulse current (11.2A). Both operate across -55°C to 150°C temperature range. The primary distinction is manufacturer and packaging designation. SMAJ22A-13-F is supplied in Tape & Reel format, while SMAJ22A-TP is also supplied in Tape & Reel. Both are suitable for direct substitution in equivalent applications.

Q: When should SM4T26AY be selected instead of SMAJ22A-TP?

A: SM4T26AY is a similar alternative, not a direct equivalent. It is selected when application requirements exceed the electrical specifications of SMAJ22A-TP. Specifically, SM4T26AY provides higher clamping voltage (48.3V versus 35.5V) and significantly higher peak pulse current (48A at 8/20µs versus 11.2A at 10/1000µs). SM4T26AY is qualified to AEC-Q101 automotive standards. Use SM4T26AY only when higher transient suppression capability is required by circuit design specifications.

Q: Are all substitute parts available in the same package format?

A: Yes. SMAJ22A-TP, SMAJ22A (MDD), SMAJ22A-13-F, and SM4T26AY are all packaged in DO-214AC (SMA) surface-mount format. All parts are suitable for identical PCB layouts and reflow soldering processes. Packaging and mounting compatibility is maintained across all listed substitutes.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. SMAJ22A-TP, SMAJ22A (MDD), SMAJ22A-13-F, and SM4T26AY are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts carry REACH Unaffected status and EAR99 export classification. SM4T26AY additionally carries AEC-Q101 automotive qualification. Compliance requirements are met across all listed substitutes for general-purpose applications.