SMCJ11 Equivalent & Substitute Parts

Part Overview

The SMCJ11 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. The device features an 11V reverse standoff voltage with a 19.11V maximum clamping voltage at peak pulse current of 82.5A, housed in a DO-214AB (SMC) package. The SMCJ11 is classified as obsolete; equivalent and substitute parts listed below provide active alternatives with comparable or enhanced electrical characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11	V
Voltage - Breakdown (Min)	11.57	V
Voltage - Clamping (Max) @ Ipp	19.11	V
Current - Peak Pulse (10/1000µs)	82.5	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ11 are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 11V (exact match required)
Voltage - Clamping (Max) @ Ipp: 18.2V to 20.1V (acceptable range for overvoltage protection margin)
Current - Peak Pulse (10/1000µs): 74.6A to 164.8A (equal or greater capacity)
Power - Peak Pulse: 1500W to 3000W (equal or greater dissipation)
Package / Case: DO-214AB, SMC (identical footprint)
Mounting Type: Surface Mount (identical assembly method)
Type: Zener (identical diode classification)
Unidirectional Channels: 1 (identical configuration)

Grouping Logic:

Group 1 (1500W Rating): SMCJ11A, SMCJ11A-13-F, SMCJ11A-TP, SMCJ11AE3/TR13, SMCJ11E3/TR13, TV15C110J-G, TV15C110J-HF — All maintain 1500W peak pulse power with 82.4A to 82.5A peak pulse current and 18.2V to 20.1V clamping voltage.
Group 2 (3000W Rating): SMLJ11A, SMLJ11A-TP — Enhanced power dissipation (3000W) with doubled peak pulse current (164.8A) while maintaining 11V standoff and 18.2V clamping voltage.

All substitute parts are active products with RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Product Status
SMCJ11	Littelfuse	11	11.57	19.11	82.5	1500	-55 to 150	Obsolete
SMCJ11A	Fairchild Semiconductor	11	12.2	18.2	82.5	1500	-55 to 150	Active
SMCJ11A-13-F	Diodes Incorporated	11	12.2	18.2	82.4	1500	-55 to 150	Active
SMCJ11A-TP	Micro Commercial Co	11	12.2	18.2	82.5	1500	-55 to 175	Active
SMCJ11AE3/TR13	Microchip Technology	11	12.2	18.2	82.4	1500	-65 to 150	Active
SMCJ11E3/TR13	Microchip Technology	11	12.2	20.1	74.6	1500	-65 to 150	Active
SMLJ11A	Bourns Inc.	11	12.2	18.2	164.8	3000	-55 to 150	Active
SMLJ11A-TP	Micro Commercial Co	11	12.2	18.2	164.8	3000	-55 to 175	Active
TV15C110J-G	Comchip Technology	11	12.2	18.2	82.42	1500	-55 to 150	Active
TV15C110J-HF	Comchip Technology	11	12.2	18.2	82.42	1500	-55 to 150	Active

Engineering Selection Recommendations

For Direct Replacement (1500W Applications): SMCJ11A (Fairchild Semiconductor), SMCJ11A-13-F (Diodes Incorporated), TV15C110J-G (Comchip Technology), and TV15C110J-HF (Comchip Technology) provide direct electrical equivalence to the SMCJ11 with active product status and RoHS3 compliance. SMCJ11A-TP (Micro Commercial Co) and SMCJ11AE3/TR13 (Microchip Technology) extend the upper operating temperature to -65°C or -55°C respectively, suitable for enhanced thermal margin applications.

For Enhanced Power Dissipation (3000W Applications): SMLJ11A (Bourns Inc.) and SMLJ11A-TP (Micro Commercial Co) double the peak pulse power rating to 3000W while maintaining the 11V standoff voltage and 18.2V clamping voltage. These parts accommodate twice the peak pulse current (164.8A) and are appropriate for applications requiring higher transient energy absorption.

For Extended Temperature Range: SMCJ11A-TP and SMLJ11A-TP (both Micro Commercial Co) support operating temperatures to -55°C to 175°C, extending the upper limit by 25°C compared to standard variants. SMCJ11AE3/TR13 and SMCJ11E3/TR13 (Microchip Technology) support lower temperatures to -65°C.

All substitute parts are RoHS3 compliant with MSL Level 1 rating and carry EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11A directly replace SMCJ11? A: Yes. SMCJ11A maintains identical reverse standoff voltage (11V), equivalent peak pulse current (82.5A), and compatible clamping voltage (18.2V vs. 19.11V). Both use DO-214AB (SMC) surface-mount packaging. SMCJ11A is an active product, whereas SMCJ11 is obsolete.

Q: What is the difference between 1500W and 3000W rated parts? A: The 1500W parts (SMCJ11A series, TV15C110J series) handle 82.4–82.5A peak pulse current. The 3000W parts (SMLJ11A series) handle 164.8A peak pulse current—double the capacity. Select based on the transient energy your circuit must suppress.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry RoHS3 compliance and MSL Level 1 (unlimited) moisture sensitivity rating, suitable for standard PCB assembly processes.

Q: Does clamping voltage variation affect substitution? A: Clamping voltage ranges from 18.2V to 20.1V across substitutes, compared to 19.11V for the original SMCJ11. All values fall within acceptable overvoltage protection margins for 11V standoff applications. SMCJ11E3/TR13 exhibits the highest clamping voltage (20.1V) with reduced peak pulse current (74.6A).

Q: Which substitute offers the widest operating temperature range? A: SMCJ11A-TP and SMLJ11A-TP (Micro Commercial Co) support -55°C to 175°C, extending 25°C above standard variants. SMCJ11AE3/TR13 and SMCJ11E3/TR13 (Microchip Technology) support the lowest temperature at -65°C.

Q: Are packaging and footprint identical across all substitutes? A: Yes. All substitute parts use DO-214AB (SMC) surface-mount package with identical footprint and land pattern, enabling direct PCB layout compatibility.

Q: What is the inventory status of substitute parts? A: All listed substitutes are active products with confirmed stock availability ranging from 790 to 15,100 pieces across multiple suppliers and packaging options (Bulk, Tape & Reel).

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