SMCJ11A-13 Transient Voltage Suppressor Diode Equivalent & Substitute Parts

Part Overview

The SMCJ11A-13 is a unidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with an 11V reverse standoff voltage and provides 18.2V maximum clamping voltage at peak pulse current of 82.4A, delivering 1500W peak pulse power dissipation in a DO-214AB (SMC) package. The SMCJ11A-13 is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for circuit protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11V	V
Voltage - Breakdown (Min)	12.2V	V
Voltage - Clamping (Max) @ Ipp	18.2V	V
Current - Peak Pulse (10/1000µs)	82.4A	A
Power - Peak Pulse	1500W	W
Operating Temperature Range	-55°C to 150°C	°C (TJ)
Package / Case	DO-214AB, SMC	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the SMCJ11A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 11V ± tolerance
Voltage - Clamping (Max) @ Ipp: 18.2V ± tolerance
Current - Peak Pulse (10/1000µs): ≥82.4A minimum
Power - Peak Pulse: ≥1500W minimum
Package / Case: DO-214AB or SMC equivalent
Mounting Type: Surface Mount
Unidirectional Channels: 1

Secondary Compatibility Parameters:

Operating Temperature Range: minimum -55°C, maximum ≥150°C
Type: Zener diode
RoHS and REACH compliance status

Substitute parts are grouped into two categories: direct electrical equivalents maintaining identical voltage and current ratings, and functionally compatible alternatives with equivalent or superior electrical performance within the same package footprint.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
SMCJ11A-13	Diodes Incorporated	11V	18.2V	82.4A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Discontinued
SMCJ11A	Fairchild Semiconductor	11V	18.2V	82.5A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMCJ11A-TP	Micro Commercial Co	11V	18.2V	82.5A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active
1.5SMC13A	Taiwan Semiconductor Corporation	11.1V	18.2V	86A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMCJ12A	MDD	12V	19.9V	75.4A	1500W	-50°C ~ 150°C	DO-214AB, SMC	Active
SMCJ15A	EVVO Semi	15V	24.4V	61.5A	600W	-65°C ~ 150°C	DO-214AC, SMA	Active
SMCJ9.0A	Taiwan Semiconductor Corporation	9V	15.4V	102A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMDJ11A	Alpha & Omega Semiconductor Inc.	11V	18.2V	164.9A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
TPSMD11A	Littelfuse Inc.	11V	18.2V	164.8A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

SMCJ11A (Fairchild Semiconductor) and SMCJ11A-TP (Micro Commercial Co) are direct electrical equivalents to the SMCJ11A-13. Both maintain identical reverse standoff voltage (11V), clamping voltage (18.2V), and peak pulse power (1500W) with peak pulse current specifications within 0.1A of the original part. Both are active products with ROHS3 compliance. SMCJ11A-TP offers extended operating temperature range to 175°C and is supplied in Tape & Reel packaging.

Higher Performance Alternatives (Functionally Compatible):

SMDJ11A (Alpha & Omega Semiconductor Inc.) and TPSMD11A (Littelfuse Inc.) maintain identical voltage ratings (11V reverse standoff, 18.2V clamping) but provide doubled peak pulse current (164.8–164.9A) and doubled power dissipation (3000W). These parts are suitable for applications requiring enhanced transient protection margin. TPSMD11A includes AEC-Q101 automotive qualification and extended temperature range to -65°C.

Voltage-Shifted Alternatives (Application-Dependent):

1.5SMC13A (Taiwan Semiconductor Corporation) provides marginally higher reverse standoff voltage (11.1V) with equivalent clamping voltage and power rating. SMCJ12A (MDD) and SMCJ15A (EVVO Semi) represent voltage-shifted alternatives with higher standoff and clamping voltages; these are suitable only for applications where higher voltage protection thresholds are acceptable.

Product Status Consideration:

All recommended substitutes are active products with current manufacturing status and established supply chains, eliminating obsolescence risk associated with the discontinued SMCJ11A-13.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11A replace SMCJ11A-13 directly?

A: Yes. SMCJ11A from Fairchild Semiconductor is a direct electrical equivalent with identical voltage ratings (11V reverse standoff, 18.2V clamping), peak pulse current (82.5A), and power dissipation (1500W). Both use DO-214AB (SMC) packaging and operate across -55°C to 150°C. Pin-for-pin and footprint compatibility is confirmed.

Q: What is the difference between SMCJ11A-TP and SMCJ11A?

A: SMCJ11A-TP is supplied in Tape & Reel (TR) packaging format, whereas SMCJ11A is supplied in Bulk packaging. Electrical specifications are identical. SMCJ11A-TP offers extended maximum operating temperature to 175°C compared to 150°C for SMCJ11A. Select SMCJ11A-TP for automated assembly processes requiring reel packaging.

Q: Can SMDJ11A or TPSMD11A be used as drop-in replacements?

A: SMDJ11A and TPSMD11A are electrically compatible but not drop-in replacements. Both maintain identical voltage ratings (11V, 18.2V) and package footprint (DO-214AB, SMC), but provide doubled peak pulse current (164.8–164.9A) and doubled power dissipation (3000W). These parts are suitable for circuits where enhanced transient protection is beneficial or required. Verify circuit design does not depend on specific current or power limitations of the original part.

Q: Are SMCJ12A and SMCJ15A suitable substitutes?

A: SMCJ12A and SMCJ15A are not direct substitutes. SMCJ12A operates at 12V reverse standoff with 19.9V clamping voltage, representing a 1V increase in protection threshold. SMCJ15A operates at 15V reverse standoff with 24.4V clamping voltage and reduced power dissipation (600W). These parts are suitable only for applications where higher voltage protection thresholds are acceptable and circuit design permits the voltage shift.

Q: What is the difference between SMCJ9.0A and SMCJ11A-13?

A: SMCJ9.0A operates at 9V reverse standoff with 15.4V clamping voltage, representing a 2V decrease in protection threshold compared to the 11V standoff of SMCJ11A-13. SMCJ9.0A provides higher peak pulse current (102A) and identical power dissipation (1500W). This part is suitable only for applications where lower voltage protection thresholds are acceptable.

Q: Are all substitute parts RoHS compliant?

A: SMCJ11A-13 is RoHS non-compliant. All recommended substitute parts (SMCJ11A-TP, 1.5SMC13A, SMCJ12A, SMCJ15A, SMCJ9.0A, SMDJ11A, TPSMD11A) are ROHS3 compliant. Verify RoHS compliance requirements for your application before final part selection.

Q: Can I use TPSMD11A in non-automotive applications?

A: Yes. TPSMD11A is AEC-Q101 qualified for automotive applications but is suitable for general-purpose use. The automotive qualification indicates higher reliability and quality standards. TPSMD11A provides identical electrical performance to SMDJ11A with extended temperature range (-65°C to 150°C) and is a valid choice for any application requiring the 11V/18.2V protection characteristics.

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