SMCJ8.0C Equivalent & Substitute Parts

Part Overview

The SMCJ8.0C is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in DO-214AB (SMC) surface mount package. This component is designed for general-purpose transient voltage suppression with an 8V reverse standoff voltage and 14.28V maximum clamping voltage at peak pulse current of 110.3A. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility within the same package class.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	8	V
Breakdown Voltage (Min)	8.42	V
Clamping Voltage (Max) @ Ipp	14.28	V
Peak Pulse Current (10/1000µs)	110.3	A
Peak Pulse Power	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMCJ8.0C is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Reverse standoff voltage: 8V (fixed)
Package / case: DO-214AB or SMC equivalent
Mounting type: Surface Mount
Bidirectional channels: 1
Type: Zener
RoHS compliance: ROHS3 Compliant

Secondary Electrical Parameters (allowable variation):

Breakdown voltage (Min): 8.42V to 8.89V range
Clamping voltage (Max) @ Ipp: 13.6V to 15V range
Peak pulse current: 100A to 220.6A (dependent on power rating)
Peak pulse power: 1500W to 3000W (dependent on current rating)
Operating temperature: -55°C to 175°C (minimum -55°C required)

Substitute parts are grouped into two categories based on peak pulse power rating:

Category A (1500W, ~110A Ipp): Direct electrical equivalents with identical power dissipation and current handling. Includes SMCJ8.0CA, SMCJ8.0CA-13-F, SMCJ8.0CA-TP, and SMCJ8.0CAE3/TR13.

Category B (3000W, ~220A Ipp): Higher power variants with doubled current capacity. Includes SMLJ8.0CA, SMLJ8.0CA-TP, SMLJ8.0CAE3/TR13, and TV30C8V0JB-G. These are suitable only when circuit design permits higher current handling without adverse effects.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Temp Range (°C)	Package	Product Status	RoHS
SMCJ8.0C	Littelfuse Inc.	8	8.42	14.28	110.3	1500	-55 to 150	DO-214AB, SMC	Obsolete	ROHS3
SMCJ8.0CA	Taiwan Semiconductor Corporation	8	8.89	13.6	115	1500	-55 to 150	DO-214AB, SMC	Active	ROHS3
SMCJ8.0CA-13-F	Diodes Incorporated	8	8.89	13.6	110.3	1500	-55 to 150	DO-214AB, SMC	Active	ROHS3
SMCJ8.0CA-TP	Micro Commercial Co	8	8.9	13.6	110.3	1500	-55 to 175	DO-214AB, SMC	Active	ROHS3
SMCJ8.0CAE3/TR13	Microchip Technology	8	8.89	13.6	110.3	1500	-65 to 150	DO-214AB, SMC	Active	ROHS3
SMCJ8.0CE3/TR13	Microchip Technology	8	8.89	15	100	1500	-65 to 150	DO-214AB, SMC	Active	ROHS3
SMLJ8.0CA	Bourns Inc.	8	8.89	13.6	220.6	3000	-55 to 150	DO-214AB, SMC	Active	ROHS3
SMLJ8.0CA-TP	Micro Commercial Co	8	8.89	13.6	220.6	3000	-55 to 175	DO-214AB, SMC	Active	ROHS3
SMLJ8.0CAE3/TR13	Microchip Technology	8	8.89	13.6	220.6	3000	-55 to 150	DO-214AB, SMC	Active	ROHS3
TV30C8V0JB-G	Comchip Technology	8	8.89	13.6	220.59	3000	-55 to 150	DO-214AB, SMC	Active	ROHS3

Engineering Selection Recommendations

Primary Substitutes (1500W Category):

SMCJ8.0CA (Taiwan Semiconductor Corporation), SMCJ8.0CA-13-F (Diodes Incorporated), SMCJ8.0CA-TP (Micro Commercial Co), and SMCJ8.0CAE3/TR13 (Microchip Technology) are direct electrical equivalents with active product status and ROHS3 compliance. These parts maintain the 1500W peak pulse power rating and 8V reverse standoff voltage of the original SMCJ8.0C. Clamping voltage ranges from 13.6V to 15V, all within acceptable substitution parameters. SMCJ8.0CA-TP and SMCJ8.0CAE3/TR13 offer extended operating temperature ranges (-55°C to 175°C and -65°C to 150°C respectively), providing additional thermal margin in demanding applications.

Secondary Substitutes (3000W Category):

SMLJ8.0CA (Bourns Inc.), SMLJ8.0CA-TP (Micro Commercial Co), SMLJ8.0CAE3/TR13 (Microchip Technology), and TV30C8V0JB-G (Comchip Technology) are higher-power variants with doubled peak pulse current capacity (220A range) and 3000W power rating. These components maintain identical 8V reverse standoff voltage and 13.6V clamping voltage. Selection of 3000W variants is appropriate only when circuit topology and transient energy profiles support the increased current handling without introducing unintended circuit behavior.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. All parts are classified as active products with established supply chains, eliminating obsolescence risk associated with the original SMCJ8.0C.

Frequently Asked Questions (FAQ)

Q: Can SMCJ8.0CA directly replace SMCJ8.0C in existing designs?

A: Yes. SMCJ8.0CA maintains identical reverse standoff voltage (8V), package (DO-214AB, SMC), and peak pulse power (1500W). Clamping voltage is 13.6V versus 14.28V in the original, representing a 4.8% reduction within acceptable substitution tolerance for general-purpose transient suppression applications.

Q: What is the difference between SMCJ and SMLJ series parts?

A: Both series use identical 8V reverse standoff voltage and DO-214AB package. The primary difference is peak pulse power rating: SMCJ series is rated 1500W with ~110A peak pulse current, while SMLJ series is rated 3000W with ~220A peak pulse current. SMLJ parts are suitable only when circuit design requires higher transient current absorption.

Q: Are temperature range differences significant for substitution?

A: Temperature range differences are secondary to primary electrical parameters. SMCJ8.0CA-TP extends to 175°C (versus 150°C standard), and SMCJ8.0CAE3/TR13 extends to -65°C (versus -55°C standard). These extended ranges provide additional operational margin but do not affect substitution validity in applications operating within standard -55°C to 150°C range.

Q: Does clamping voltage variation affect circuit protection?

A: Clamping voltage variation from 13.6V to 15V represents the maximum voltage presented to protected circuitry during transient events. The original SMCJ8.0C clamps at 14.28V. Substitutes with 13.6V clamping provide slightly better protection margin, while 15V clamping remains within acceptable range for 8V-rated circuit protection. Circuit design must confirm that protected components tolerate the specified clamping voltage.

Q: Can SMCJ8.0CE3/TR13 substitute for SMCJ8.0C?

A: SMCJ8.0CE3/TR13 maintains 8V reverse standoff voltage, 1500W power rating, and DO-214AB package. However, clamping voltage is 15V with reduced peak pulse current (100A versus 110.3A). This part is suitable only when circuit design permits 15V clamping voltage and does not require 110A+ current capacity.

Q: What packaging options are available?

A: All substitute parts use DO-214AB (SMC) surface mount package, identical to the original SMCJ8.0C. Packaging variations (Tape & Reel, Bulk) refer to supply format only and do not affect electrical or mechanical compatibility. Moisture sensitivity level is MSL 1 (Unlimited) across all parts.

Q: Are there supply availability differences between substitutes?

A: Yes. Inventory levels vary: SMCJ8.0CA (Taiwan Semiconductor) shows 84,100 units, while SMCJ8.0CAE3/TR13 (Microchip) shows 871 units. For high-volume production, SMCJ8.0CA offers superior supply continuity. For lower-volume applications, all listed substitutes maintain active product status with established distribution channels.

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