SMCJ17C Equivalent & Substitute Parts

Part Overview

The SMCJ17C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 17V reverse standoff voltage with a 28.98V maximum clamping voltage and 54.4A peak pulse current capability in a DO-214AB (SMC) package. The SMCJ17C is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	17V
Voltage - Breakdown (Min)	17.91V
Voltage - Clamping (Max) @ Ipp	28.98V
Current - Peak Pulse (10/1000µs)	54.4A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature Range	-55°C ~ 150°C
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SMCJ17C are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Voltage - Reverse Standoff: 17V (exact match required)
Voltage - Clamping (Max) @ Ipp: 27.6V to 30.5V (within acceptable tolerance range)
Current - Peak Pulse: 49.2A to 108.7A (equal or greater capability)
Power - Peak Pulse: 1500W to 3000W (equal or greater capability)
Package / Case: DO-214AB, SMC (identical form factor)
Type: Zener, Bidirectional (1 channel)
RoHS Status: ROHS3 Compliant

Substitutes are classified into two categories based on peak pulse current and power dissipation:

Category A (1500W, ~54A): SMCJ17CA-TP, SMCJ17CAE3/TR13, SMCJ17CE3/TR13, TV15C170JB-G Category B (3000W, ~107A): SMLJ17CA, SMLJ17CA-TP, TV30C170JB-G

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status
SMCJ17C	Littelfuse Inc.	17V	28.98V	54.4A	1500W	-55°C ~ 150°C	Obsolete
SMCJ17CA-TP	Micro Commercial Co	17V	27.6V	54.4A	1500W	-55°C ~ 175°C	Active
SMCJ17CAE3/TR13	Microchip Technology	17V	27.6V	53.3A	1500W	-65°C ~ 150°C	Active
SMCJ17CE3/TR13	Microchip Technology	17V	30.5V	49.2A	1500W	-65°C ~ 150°C	Active
TV15C170JB-G	Comchip Technology	17V	27.6V	54.35A	1500W	-55°C ~ 150°C	Active
SMLJ17CA	Bourns Inc.	17V	27.6V	106.6A	3000W	-55°C ~ 150°C	Active
SMLJ17CA-TP	Micro Commercial Co	17V	27.6V	106.6A	3000W	-55°C ~ 175°C	Active
TV30C170JB-G	Comchip Technology	17V	27.6V	108.7A	3000W	-55°C ~ 150°C	Active

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and identical package specifications (DO-214AB, SMC). Selection between Category A and Category B substitutes depends on circuit requirements:

Category A substitutes (SMCJ17CA-TP, SMCJ17CAE3/TR13, SMCJ17CE3/TR13, TV15C170JB-G) maintain the 1500W power dissipation specification of the original SMCJ17C with peak pulse currents between 49.2A and 54.4A. These are direct functional replacements for applications with equivalent thermal and current handling requirements.

Category B substitutes (SMLJ17CA, SMLJ17CA-TP, TV30C170JB-G) provide enhanced current handling capability (106.6A to 108.7A) and doubled power dissipation (3000W). These are suitable for applications requiring higher transient energy absorption or where thermal margin is critical.

SMCJ17CA-TP and SMLJ17CA-TP offer extended operating temperature ranges (-55°C to 175°C) compared to the original specification, providing additional design flexibility. SMCJ17CAE3/TR13 and SMCJ17CE3/TR13 support lower minimum operating temperatures (-65°C), beneficial for harsh environment applications.

Frequently Asked Questions (FAQ)

Q: Can SMCJ17CA-TP directly replace SMCJ17C in existing designs? A: Yes. SMCJ17CA-TP maintains identical reverse standoff voltage (17V), comparable clamping voltage (27.6V vs 28.98V), and equivalent peak pulse current (54.4A). The DO-214AB package is identical. Extended temperature range (-55°C to 175°C) provides additional operational margin.

Q: What is the difference between Category A and Category B substitutes? A: Category A parts (SMCJ17CA-TP, SMCJ17CAE3/TR13, SMCJ17CE3/TR13, TV15C170JB-G) are rated for 1500W peak pulse power with ~54A current. Category B parts (SMLJ17CA, SMLJ17CA-TP, TV30C170JB-G) are rated for 3000W peak pulse power with ~107A current. Category B provides higher transient energy absorption capability.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant, matching the original SMCJ17C specification.

Q: Does clamping voltage variation affect substitutability? A: Clamping voltages range from 27.6V to 30.5V across substitutes, compared to 28.98V for the original. These variations remain within acceptable tolerance for TVS diode applications and do not prevent substitution. Circuit design should account for maximum clamping voltage in worst-case analysis.

Q: Can I use a Category B substitute in place of the original SMCJ17C? A: Yes. Category B substitutes provide equal or superior electrical performance with higher current and power ratings. They are physically identical in package form factor and maintain the same 17V reverse standoff voltage. Higher ratings provide additional design margin without functional compromise.

Q: What packaging options are available for substitutes? A: Substitutes are available in Tape & Reel (TR) packaging for automated assembly. SMCJ17CA from Fairchild Semiconductor is available in Bulk packaging. All maintain the DO-214AB (SMC) component package specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message