SMCJ17A-TP Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The SMCJ17A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. The device features a 17V reverse standoff voltage with 27.6V maximum clamping voltage and 54.4A peak pulse current capability in a DO-214AB (SMC) package. This part is Active status and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AB package family, enabling direct or near-direct replacement in circuit designs where TVS protection is required.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	17	V
Voltage - Breakdown (Min)	18.9	V
Voltage - Clamping (Max) @ Ipp	27.6	V
Current - Peak Pulse (10/1000µs)	54.4	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 175	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents match all critical electrical parameters (reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current) within the same DO-214AB package. These parts are pin-for-pin compatible and functionally interchangeable.

Similar Substitutes maintain the same voltage ratings and package form factor but differ in peak pulse current handling capability or power dissipation. Selection depends on circuit requirements for transient energy absorption.

The following key parameters determine substitution eligibility:

Voltage - Reverse Standoff: 17V (fixed)
Voltage - Clamping (Max) @ Ipp: 27.6V (fixed)
Package / Case: DO-214AB, SMC (fixed)
Mounting Type: Surface Mount (fixed)
Unidirectional Channels: 1 (fixed)

Parameter Comparison

Part Number	Manufacturer	Vwm (V)	Vbr (V)	Vc (V)	Ipp (A)	Ppk (W)	Toper (°C)	Package	Status
SMCJ17A-TP	Micro Commercial Co	17	18.9	27.6	54.4	1500	-55 to 175	DO-214AB	Active
SMCJ17A	Fairchild Semiconductor	17	18.9	27.6	54.4	1500	-55 to 150	DO-214AB	Active
SMCJ17A-13-F	Diodes Incorporated	17	18.9	27.6	53.3	1500	-55 to 150	DO-214AB	Active
SZ1SMC17AT3G	Littelfuse Inc.	17	18.9	27.6	53.3	1500	-65 to 150	DO-214AB	Active
SMDJ17A-T7	Littelfuse Inc.	17	18.9	27.6	108.7	3000	-65 to 150	DO-214AB	Active
SMLJ17A	Bourns Inc.	17	18.9	27.6	106.6	3000	-55 to 150	DO-214AB	Active
5.0SMDJ17A	Taiwan Semiconductor Corporation	17	18.9	27.6	181	5000	-55 to 175	DO-214AB	Active
5.0SMDJ17A-T7	Littelfuse Inc.	17	18.9	27.6	181	5000	-65 to 150	DO-214AB	Active

Engineering Selection Recommendations

Direct Equivalent Selection: SMCJ17A (Fairchild Semiconductor) and SMCJ17A-13-F (Diodes Incorporated) provide direct electrical equivalence to SMCJ17A-TP with identical voltage ratings and peak pulse current specifications. Both are RoHS3 compliant and Active status. Selection between these options depends on packaging preference (Bulk vs. Tape & Reel) and maximum operating temperature requirement (150°C vs. 175°C).

Higher Current Capability Alternatives: SMDJ17A-T7 (Littelfuse Inc.), SMLJ17A (Bourns Inc.), 5.0SMDJ17A (Taiwan Semiconductor Corporation), and 5.0SMDJ17A-T7 (Littelfuse Inc.) offer increased peak pulse current handling (108.7A to 181A) and power dissipation (3000W to 5000W) while maintaining identical voltage ratings. These parts are suitable for applications requiring enhanced transient energy absorption within the same voltage protection window.

Automotive-Grade Option: SZ1SMC17AT3G (Littelfuse Inc.) is AEC-Q101 qualified and suitable for automotive applications. It maintains 1500W power rating with 53.3A peak pulse current and operates across -65°C to 150°C temperature range.

All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can SMCJ17A-TP be replaced with SMCJ17A? A: Yes. SMCJ17A provides identical electrical performance (17V standoff, 27.6V clamping, 54.4A peak pulse current) in the same DO-214AB package. The primary difference is maximum operating temperature (150°C vs. 175°C) and packaging format (Bulk vs. Tape & Reel).

Q: What is the difference between SMCJ17A and SMDJ17A-T7? A: Both maintain identical voltage ratings (17V standoff, 27.6V clamping) and DO-214AB package compatibility. SMDJ17A-T7 provides higher peak pulse current (108.7A vs. 54.4A) and power dissipation (3000W vs. 1500W), making it suitable for applications with greater transient energy requirements.

Q: Are the 5.0SMDJ17A series parts compatible with SMCJ17A-TP? A: Yes, mechanically and electrically. The 5.0SMDJ17A series maintains identical voltage ratings and DO-214AB package form factor but provides significantly higher peak pulse current (181A) and power dissipation (5000W). Use this series when circuit transient energy absorption exceeds 1500W.

Q: Is SZ1SMC17AT3G suitable for automotive applications? A: Yes. SZ1SMC17AT3G is AEC-Q101 qualified for automotive use, maintains identical voltage ratings, and operates across -65°C to 150°C. It is the specified choice for automotive circuit protection requiring 17V standoff voltage protection.

Q: Do all substitute parts use the same DO-214AB package? A: Yes. All listed substitute parts use DO-214AB (SMC) package, ensuring mechanical and pin compatibility for direct PCB replacement without layout modification.

Q: What is the temperature operating range consideration for substitution? A: SMCJ17A-TP operates to 175°C. Most direct equivalents operate to 150°C. For applications requiring full 175°C operation, specify SMCJ17A-TP, 5.0SMDJ17A, or equivalent parts with matching temperature rating.

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