SMAJ22CA-M3/61 Equivalent & Substitute Parts

Part Overview

The SMAJ22CA-M3/61 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component in DO-214AC (SMA) package is designed for general purpose transient voltage protection applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative packaging formats are required.

Substiute Parts

SMAJ22CA-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 918SMAJ22CA-M3/61 Datasheet

Current PartRFQ

SMAJ22CA-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 161110SMAJ22CA-E3/61 Datasheet

DirectRFQ

SMAJ22CA

MDDIn Stock: 31205SMAJ22CA Datasheet

DirectRFQ

SM4T26CAY

STMicroelectronicsIn Stock: 2396SM4T26CAY Datasheet

MFR RecommendedRFQ

SMAJ22CA-13-F

Diodes IncorporatedIn Stock: 4615SMAJ22CA-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ22CA-M3/61 are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V (or higher acceptable for protection margin)
• Current - Peak Pulse (10/1000µs): 11.3A (or higher acceptable for protection margin)
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C (TJ)

Grouping Categories:

Group 1 - Direct Electrical & Mechanical Equivalents (Packaging Variant): Parts with identical electrical specifications and same package, differing only in packaging format (Tape & Reel vs. Cut Tape).

Group 2 - Manufacturer Alternatives (Same Base Specifications): Parts from different manufacturers with identical electrical parameters and package compatibility.

Group 3 - Manufacturer Recommended Alternatives (Enhanced Specifications): Parts with higher clamping voltage or peak pulse current, suitable for applications requiring additional protection margin while maintaining the same reverse standoff voltage and package form factor.

Parameter Comparison

Engineering Selection Recommendations

SMAJ22CA-E3/61 (Vishay General Semiconductor - Diodes Division) This part is a direct electrical equivalent with identical specifications to the SMAJ22CA-M3/61. The difference is packaging format: Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR). Selection is appropriate when procurement requires alternative packaging formats. Product status is Active and ROHS3 compliant. Inventory availability is 161,000 pieces.

SMAJ22CA (MDD) This part provides electrical equivalence with identical voltage and power specifications. Operating temperature range is -50°C to 150°C (versus -55°C to 150°C for the primary part). Selection is appropriate when the lower temperature limit of -50°C is acceptable for the application. Product status is Active and ROHS3 compliant. Inventory availability is 31,141 pieces.

SMAJ22CA-13-F (Diodes Incorporated) This part is electrically equivalent with peak pulse current of 11.2A (versus 11.3A for the primary part), representing a negligible difference within typical application tolerances. Package and operating temperature range are identical. Product status is Active and ROHS3 compliant. Inventory availability is 4,590 pieces.

SM4T26CAY (STMicroelectronics) This part is manufacturer recommended as a substitute with enhanced specifications: clamping voltage of 48.3V (versus 35.5V) and peak pulse current of 48A at 8/20µs pulse width (versus 11.3A at 10/1000µs). The reverse standoff voltage of 22V and package form factor remain identical. This part is suitable for applications requiring higher transient protection margin. Product status is Active, ROHS3 compliant, and AEC-Q101 qualified for automotive applications. Inventory availability is 2,330 pieces.

Frequently Asked Questions (FAQ)

Q: Can SMAJ22CA-E3/61 be used as a direct replacement for SMAJ22CA-M3/61? A: Yes. Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications (22V reverse standoff, 35.5V clamping, 11.3A peak pulse current, 400W peak power). The only difference is packaging format: SMAJ22CA-E3/61 uses Cut Tape & Digi-Reel® while SMAJ22CA-M3/61 uses Tape & Reel. Both are ROHS3 compliant and rated for -55°C to 150°C operating temperature.

Q: What is the difference between SMAJ22CA from MDD and the Vishay SMAJ22CA-M3/61? A: Electrical specifications are identical (22V reverse standoff, 35.5V clamping, 11.3A peak pulse current, 400W peak power). The MDD part has a lower operating temperature minimum of -50°C versus -55°C for the Vishay part. If your application operates above -50°C, the MDD part is suitable. Both are ROHS3 compliant and use DO-214AC SMA package.

Q: Why is SM4T26CAY listed as a substitute when it has different electrical specifications? A: SM4T26CAY is manufacturer recommended as a substitute because it maintains the same reverse standoff voltage (22V) and package form factor (DO-214AC SMA), but provides enhanced protection with higher clamping voltage (48.3V) and significantly higher peak pulse current (48A). This makes it suitable for applications requiring greater transient protection margin. It is AEC-Q101 qualified for automotive use.

Q: Can I use SM4T26CAY in place of SMAJ22CA-M3/61 without circuit modification? A: The higher clamping voltage (48.3V versus 35.5V) means the protected circuit will experience higher voltage transients before suppression. Verify that downstream components can tolerate this higher clamping voltage. The package and reverse standoff voltage are identical, so mechanical and basic functional compatibility is maintained. Circuit-level validation is required.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (SMAJ22CA-E3/61, SMAJ22CA, SMAJ22CA-13-F, and SM4T26CAY) are ROHS3 compliant. All are rated for Moisture Sensitivity Level 1 (Unlimited).

Q: What is the difference between 10/1000µs and 8/20µs pulse width specifications? A: These represent different standard test pulse waveforms. The SMAJ22CA-M3/61 is specified at 10/1000µs (10µs rise time, 1000µs pulse width), while SM4T26CAY is specified at 8/20µs (8µs rise time, 20µs pulse width). Both are valid TVS diode test standards. The 8/20µs waveform is commonly used for lightning and surge testing, while 10/1000µs is used for general transient testing.