SMAJ22CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ22CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 22V reverse standoff voltage and provides clamping at 39.4V maximum, with a peak pulse current rating of 12.7A (10/1000µs). The device is packaged in DO-214AC (SMA) format and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

The SMAJ22CE3/TR13 maintains active product status and is suitable for general-purpose transient suppression. Equivalent and substitute parts are identified based on matching or compatible electrical characteristics within the 22V standoff voltage class, surface-mount SMA packaging, and general-purpose application requirements.

Substiute Parts

SMAJ22CE3/TR13

Microchip TechnologyIn Stock: 846SMAJ22CE3/TR13 Datasheet

Current PartRFQ

SM4T26CAY

STMicroelectronicsIn Stock: 2396SM4T26CAY Datasheet

SimilarRFQ

SMAJ22CA

MDDIn Stock: 31205SMAJ22CA Datasheet

SimilarRFQ

SMAJ22CA

MDDIn Stock: 31205SMAJ22CA Datasheet

SimilarRFQ

SMAJ22CA-13-F

Diodes IncorporatedIn Stock: 4615SMAJ22CA-13-F Datasheet

SimilarRFQ

SMAJ22CA-TP

Micro Commercial CoIn Stock: 5291SMAJ22CA-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ22CE3/TR13 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional
• Bidirectional Channels: 1

Secondary Compatibility Factors:

• Voltage - Clamping (Max) @ Ipp: Range 35.5V to 48.3V (acceptable variation within TVS diode specifications)
• Current - Peak Pulse (10/1000µs): Range 11.2A to 48A (device-dependent, application-specific)
• Power - Peak Pulse: Range 400W to 500W
• Operating Temperature Range: Minimum -55°C to maximum 175°C
• RoHS3 Compliance and MSL 1 rating

All substitute parts listed maintain the 22V standoff voltage class and SMA surface-mount package, ensuring mechanical and electrical compatibility with the original SMAJ22CE3/TR13 in standard PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

SMAJ22CA (MDD) and SMAJ22CA-13-F (Diodes Incorporated)

These parts provide the closest electrical equivalence to the SMAJ22CE3/TR13. Both maintain identical standoff voltage (22V), breakdown voltage (24.4V), and clamping voltage specifications within acceptable TVS diode tolerances (35.5V vs. 39.4V). Peak pulse current ratings are comparable (11.2–11.3A vs. 12.7A). All three parts are RoHS3 compliant with MSL 1 rating and active product status. The SMAJ22CA-13-F from Diodes Incorporated extends the operating temperature range to -55°C, matching the lower temperature limit of the STMicroelectronics alternative.

SMAJ22CA-TP (Micro Commercial Co)

This substitute offers identical electrical parameters to the SMAJ22CA series with an extended upper operating temperature limit of 175°C (TA), compared to 150°C (TJ) for the original part. This extended thermal range may be advantageous in high-temperature applications. RoHS3 compliance and MSL 1 rating are maintained.

SM4T26CAY (STMicroelectronics)

This part operates within the 22V standoff voltage class but exhibits higher clamping voltage (48.3V) and significantly higher peak pulse current (48A at 8/20µs pulse width). The SM4T26CAY is qualified to AEC-Q101 automotive standards and carries the TRANSIL™ series designation. This device is suitable for applications requiring higher transient current handling capacity. The lower operating temperature minimum (-55°C) and reduced peak pulse power (400W) should be evaluated against application requirements.

All substitute parts maintain surface-mount SMA (DO-214AC) packaging, ensuring direct PCB layout compatibility with the SMAJ22CE3/TR13.

Frequently Asked Questions (FAQ)

Q: Can SMAJ22CA parts directly replace SMAJ22CE3/TR13 in existing designs?

A: Yes. The SMAJ22CA series (including SMAJ22CA, SMAJ22CA-13-F, and SMAJ22CA-TP) maintains identical standoff voltage (22V), breakdown voltage (24.4V), and SMA package specifications. Clamping voltage variation (35.5V vs. 39.4V) falls within acceptable TVS diode operating tolerances. All parts are RoHS3 compliant with MSL 1 rating and active product status.

Q: What is the difference between SMAJ22CA-13-F and SMAJ22CA-TP?

A: Both parts share identical electrical specifications (22V standoff, 24.4V breakdown, 35.5V clamping, 11.2A peak pulse current). The primary difference is operating temperature range: SMAJ22CA-13-F operates from -55 to 150°C (TJ), while SMAJ22CA-TP extends to -55 to 175°C (TA). Selection depends on application thermal requirements.

Q: When should SM4T26CAY be selected instead of SMAJ22CA variants?

A: The SM4T26CAY is appropriate for applications requiring higher transient current suppression (48A vs. 11.2A) or automotive-grade qualification (AEC-Q101). However, the higher clamping voltage (48.3V) and different pulse width specification (8/20µs vs. 10/1000µs) indicate this device is optimized for different transient profiles. Verify application transient characteristics before substitution.

Q: Are all substitute parts available in tape and reel packaging?

A: SMAJ22CE3/TR13, SM4T26CAY, SMAJ22CA-13-F, and SMAJ22CA-TP are specified with tape and reel (TR) packaging. SMAJ22CA (MDD) does not specify packaging format in the provided data. Confirm packaging availability with the supplier for production requirements.

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

A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (unlimited) rating, matching the compliance profile of the SMAJ22CE3/TR13.

Q: What is the significance of the different pulse width specifications (10/1000µs vs. 8/20µs)?

A: Pulse width specifications define the transient waveform used for device characterization. The 10/1000µs specification (SMAJ22CE3/TR13, SMAJ22CA variants) represents a slower transient profile, while 8/20µs (SM4T26CAY) represents a faster transient. These specifications affect peak current and clamping voltage measurements. Application transient characteristics must align with the device specification to ensure proper protection.

Q: Can SMAJ22CA parts be used in automotive applications?

A: The SMAJ22CA, SMAJ22CA-13-F, and SMAJ22CA-TP are not specified with automotive qualification in the provided data. The SM4T26CAY carries AEC-Q101 automotive qualification. For automotive applications, verify qualification requirements with the component supplier or design specification.