SMCJ85A-13 Transient Voltage Suppressor (TVS) Diode Equivalent & Substitute Parts

Part Overview

The SMCJ85A-13 is a unidirectional Zener TVS diode manufactured by Diodes Incorporated in DO-214AB (SMC) surface mount package. This component is designed for general-purpose transient voltage suppression with an 85V reverse standoff voltage and 137V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers that maintain the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	85V
Voltage - Breakdown (Min)	94.4V
Voltage - Clamping (Max) @ Ipp	137V
Current - Peak Pulse (10/1000µs)	10.4A
Power - Peak Pulse	1500W
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)

Substitute Part Grouping Explanation

Substitute parts for the SMCJ85A-13 are classified based on strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - Reverse Standoff: 85V
Voltage - Clamping (Max) @ Ipp: 137V
Voltage - Breakdown (Min): 94.4V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Acceptable Variation Parameters:

Current - Peak Pulse (10/1000µs): 10.4A or higher
Power - Peak Pulse: 1500W or higher
Operating Temperature: -55°C to 150°C minimum range

Substitutes are grouped into two categories: direct equivalents maintaining 1500W power rating, and higher-power alternatives (3000W–5000W) that provide enhanced transient suppression capability while maintaining identical voltage specifications and package form factor.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status	RoHS Status
SMCJ85A-13	Diodes Incorporated	85V	137V	10.4A	1500W	-55°C ~ 150°C	Discontinued	Non-compliant
SMCJ85A-13-F	Diodes Incorporated	85V	137V	10.4A	1500W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ85A	MDD	85V	137V	11A	1500W	-50°C ~ 150°C	Active	ROHS3 Compliant
SMCJ85A-TP	Micro Commercial Co	85V	137V	11A	1500W	-55°C ~ 175°C	Active	ROHS3 Compliant
SMDJ85A	Alpha & Omega Semiconductor Inc.	85V	137V	21.9A	3000W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMLJ85A	Bourns Inc.	85V	137V	20.8A	3000W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMLJ85A-TP	Micro Commercial Co	85V	137V	20.8A	3000W	-55°C ~ 175°C	Active	ROHS3 Compliant
5.0SMDJ85A	Taiwan Semiconductor Corporation	85V	137V	36.5A	5000W	-55°C ~ 175°C	Active	ROHS3 Compliant
5.0SMDJ85A-T7	Littelfuse	85V	137V	36.5A	5000W	-65°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (1500W Power Rating):

SMCJ85A-13-F from Diodes Incorporated is the primary direct substitute. It maintains identical electrical specifications and package form factor while offering active product status and ROHS3 compliance. This part is recommended for applications requiring exact performance matching with the original SMCJ85A-13.

SMCJ85A-TP from Micro Commercial Co provides equivalent performance with extended operating temperature range (-55°C to 175°C) and ROHS3 compliance. This option is suitable for applications with wider temperature requirements.

SMCJ85A from MDD offers equivalent electrical performance with ROHS3 compliance and active status. The operating temperature range extends to -50°C minimum, which is acceptable for most general-purpose applications.

Higher-Power Alternatives (3000W–5000W):

SMDJ85A, SMLJ85A, SMLJ85A-TP, 5.0SMDJ85A, and 5.0SMDJ85A-T7 maintain identical voltage specifications while providing increased peak pulse current and power dissipation capability. These parts are electrically compatible and mechanically interchangeable in DO-214AB (SMC) package footprints. Selection among these options depends on application requirements for enhanced transient suppression margin and thermal performance. All listed alternatives carry ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can SMCJ85A-13-F be used as a direct replacement for SMCJ85A-13?

A: Yes. SMCJ85A-13-F maintains identical voltage specifications (85V standoff, 137V clamping), current rating (10.4A peak pulse), power rating (1500W), and DO-214AB (SMC) package form factor. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between 1500W and 3000W/5000W rated parts?

A: Power rating reflects peak pulse dissipation capability. Higher-power alternatives (SMDJ85A, SMLJ85A, 5.0SMDJ85A series) provide greater transient suppression margin and thermal headroom while maintaining identical voltage clamping characteristics. All maintain the same 85V standoff and 137V clamping voltage.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use DO-214AB (SMC) surface mount package, ensuring mechanical and footprint compatibility with the original SMCJ85A-13.

Q: Which substitute offers the widest operating temperature range?

A: SMCJ85A-TP, SMLJ85A-TP, and 5.0SMDJ85A provide operating ranges of -55°C to 175°C, extending the upper temperature limit by 25°C compared to the original specification.

Q: Are all substitutes RoHS compliant?

A: All listed active substitutes carry ROHS3 compliance. The original SMCJ85A-13 is RoHS non-compliant. ROHS3-compliant alternatives are recommended for applications subject to RoHS regulatory requirements.

Q: Can higher-power rated parts be used in place of the 1500W original?

A: Yes. Higher-power alternatives (3000W and 5000W) are electrically and mechanically compatible. They provide identical voltage protection with enhanced transient suppression capability and do not introduce compatibility issues in standard applications.

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