SMAJ16CA-TP Equivalent & Substitute Parts

Part Overview

The SMAJ16CA-TP is a transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 16V reverse standoff voltage and 26V maximum clamping voltage, delivering 15.3A peak pulse current in a DO-214AC (SMA) package. The part is active in production status and ROHS3 compliant. Substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	16	V
Voltage - Breakdown (Min)	17.8	V
Voltage - Clamping (Max) @ Ipp	26	V
Current - Peak Pulse (10/1000µs)	15.3	A
Power - Peak Pulse	400	W
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-55 to 175	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ16CA-TP is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 16V
Voltage - Clamping (Max) @ Ipp: 26V
Current - Peak Pulse (10/1000µs): 15.3A minimum
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

All identified substitute parts meet these core electrical specifications and package requirements. Variations in operating temperature range, peak pulse power rating, and manufacturer-specific certifications do not affect functional substitution within general-purpose applications.

Parameter Comparison

Parameter	SMAJ16CA-TP (Micro Commercial Co)	SMAJ16CA-13-F (Diodes Incorporated)	SMAJ16CA (MDD)	SZ1SMA16CAT3G (Littelfuse Inc.)
Voltage - Reverse Standoff (Typ)	16V	16V	16V	16V
Voltage - Breakdown (Min)	17.8V	17.8V	17.8V	17.8V
Voltage - Clamping (Max) @ Ipp	26V	26V	26V	26V
Current - Peak Pulse (10/1000µs)	15.3A	15.3A	15.4A	15.4A
Power - Peak Pulse	400W	400W	400W	400W
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature Range	-55 to 175°C (TA)	-55 to 150°C (TJ)	-50 to 150°C (TJ)	-65 to 150°C (TJ)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts listed are active production components with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for direct substitution in general-purpose TVS applications.

SMAJ16CA-13-F (Diodes Incorporated) is a direct manufacturer equivalent with identical electrical specifications and packaging. This part is recommended as the primary substitute when SMAJ16CA-TP availability is constrained.

SMAJ16CA (MDD) provides equivalent electrical performance with marginally higher peak pulse current (15.4A vs. 15.3A) and operates within a narrower temperature range (-50 to 150°C). This part is suitable for applications where the operating temperature envelope does not exceed -50°C.

SZ1SMA16CAT3G (Littelfuse Inc.) meets all electrical requirements and extends the lower operating temperature limit to -65°C. This part carries AEC-Q101 automotive qualification and is specified for applications requiring automotive-grade reliability. The SZ1SMA series includes measured capacitance data (375pF @ 1MHz), providing additional design reference information.

Selection among these substitutes should be based on supply availability, lead time requirements, and application-specific temperature or qualification mandates.

Frequently Asked Questions (FAQ)

Q: Can SMAJ16CA-13-F replace SMAJ16CA-TP in existing designs? A: Yes. Both parts share identical voltage ratings (16V standoff, 26V clamping), current specifications (15.3A peak pulse), and DO-214AC SMA packaging. Direct substitution is electrically and mechanically compatible.

Q: What is the difference between the MDD SMAJ16CA and the original SMAJ16CA-TP? A: The MDD part delivers 15.4A peak pulse current (0.1A higher) and operates across -50 to 150°C. The SMAJ16CA-TP operates to 175°C. Both meet the 16V/26V voltage specification. The MDD part is suitable for applications not requiring operation below -50°C.

Q: Is the Littelfuse SZ1SMA16CAT3G suitable for automotive applications? A: Yes. The SZ1SMA16CAT3G carries AEC-Q101 automotive qualification and is rated for -65 to 150°C operation. It is appropriate for automotive and high-reliability applications requiring extended low-temperature performance.

Q: Are all substitute parts available in Tape & Reel packaging? A: SMAJ16CA-13-F and SZ1SMA16CAT3G are specified in Tape & Reel (TR) packaging. The MDD SMAJ16CA packaging designation is not specified in available data. Confirm packaging availability with the supplier before design release.

Q: Do these parts require different PCB footprints? A: No. All parts use the DO-214AC (SMA) package and share identical footprint geometry. No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to all substitute parts? A: All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special storage or handling requirements.

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