SMCJ85CE3/TR13

Part Overview

The SMCJ85CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose voltage transient protection in surface-mount applications. This component operates with an 85V reverse standoff voltage and provides clamping at 151V maximum, with a peak pulse current rating of 9.9A and peak pulse power of 1500W. The part maintains active product status and meets RoHS3 compliance requirements with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are necessary when procurement constraints, manufacturer availability, or specific application requirements (such as enhanced current-handling capacity or operating temperature range) make alternative sources or higher-rated components preferable.

Key Parameters

Parameter	SMCJ85CE3/TR13
Manufacturer	Microchip Technology
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	85V
Voltage - Breakdown (Min)	94.4V
Voltage - Clamping (Max) @ Ipp	151V
Current - Peak Pulse (10/1000µs)	9.9A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-65°C to 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution validity for the SMCJ85CE3/TR13 is determined by the following electrical and mechanical parameters:

Critical Match Parameters:

Voltage - Reverse Standoff (Typ): 85V (all candidates maintain this)
Voltage - Breakdown (Min): 94.4V (all candidates maintain this)
Package / Case: DO-214AB, SMC (all candidates match)
Mounting Type: Surface Mount (all candidates match)
Bidirectional Channels: 1 (all candidates match)

Acceptable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: Range from 137V to 178V (higher clamping voltages provide equivalent or superior protection)
Current - Peak Pulse (10/1000µs): Range from 10.4A to 56A (higher current ratings remain compatible with circuit designs)
Power - Peak Pulse: Range from 1500W to 5000W (higher power ratings provide equivalent or superior dissipation capability)
Operating Temperature: Range from -55°C to 175°C (overlapping ranges with minimum -55°C to maximum 175°C envelope)

Substitute parts maintain the same voltage class and package footprint while offering variations in transient current handling and thermal performance. All listed substitutes are active products with RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
SMCJ85CE3/TR13	Microchip Technology	85V	94.4V	151V	9.9A	1500W	-65°C to 150°C	DO-214AB, SMC	Active
5.0SMDJ85CA	MDE Semiconductor Inc	85V	94.4V	137V	36.5A	5000W	-55°C to 150°C	DO-214AB, SMC	Active
5.0SMDJ85CA-T7	Littelfuse Inc.	85V	94.4V	137V	36.5A	5000W	-65°C to 150°C	DO-214AB, SMC	Active
5.0SMLJ85CA-TP	Micro Commercial Co	85V	94.4V	137V	36.5A	5000W	-55°C to 175°C	DO-214AB, SMC	Active
SMCJ85CA	Fairchild Semiconductor	85V	94.4V	137V	11A	1500W	-55°C to 150°C	DO-214AB, SMC	Active
SMCJ85CA-13-F	Diodes Incorporated	85V	94.4V	137V	10.4A	1500W	-55°C to 150°C	DO-214AB, SMC	Active
SMCJ85CA-TR	STMicroelectronics	85V	94V	178V	56A (8/20µs)	1500W	-55°C to 150°C	DO-214AB, SMC	Active
SMDJ85CA	Alpha & Omega Semiconductor Inc.	85V	94.4V	137V	21.9A	3000W	-55°C to 150°C	DO-214AB, SMC	Active
SMLJ85CA	Bourns Inc.	85V	94.4V	137V	20.8A	3000W	-55°C to 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and RoHS3 compliance, satisfying fundamental engineering requirements for new designs and procurement.

For applications with extended low-temperature requirements: SMCJ85CE3/TR13 supports operation to -65°C; 5.0SMDJ85CA-T7 and 5.0SMDJ85CA-T7 similarly support this range. 5.0SMLJ85CA-TP extends to -55°C minimum with an upper limit of 175°C, providing the widest thermal envelope.

For applications requiring enhanced transient current handling: 5.0SMDJ85CA, 5.0SMDJ85CA-T7, 5.0SMLJ85CA-TP, SMDJ85CA, and SMLJ85CA provide peak pulse currents from 20.8A to 36.5A, compared to the primary part's 9.9A. These selections are suitable for circuits experiencing higher-energy transient events.

For applications with stringent clamping voltage requirements: SMCJ85CA-TR from STMicroelectronics provides the highest clamping voltage at 178V, appropriate where lower clamping voltages present risk to downstream components.

For electrically equivalent near-substitutes: SMCJ85CA from Fairchild Semiconductor and SMCJ85CA-13-F from Diodes Incorporated maintain nearly identical electrical specifications to the primary part (9.9A to 10.4A peak pulse current, 1500W power rating, 137V clamping), with only minor temperature range variations (-55°C to 150°C versus -65°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts be used as direct 1:1 replacements for the SMCJ85CE3/TR13?

A: Yes, SMCJ85CA from Fairchild Semiconductor and SMCJ85CA-13-F from Diodes Incorporated are electrically and mechanically compatible as direct substitutes, maintaining the same voltage class (85V standoff), package (DO-214AB/SMC), and similar current/power ratings (10.4A to 11A peak pulse, 1500W power). Minor differences in operating temperature range do not affect compatibility in most applications.

Q: What is the difference between parts with 137V clamping and the original part's 151V clamping?

A: Both clamping voltages remain within acceptable voltage suppression limits for 85V-class TVS diodes. The 137V clamping variants provide slightly lower voltage clamping, which may offer marginally better protection but do not affect circuit compatibility. The 151V clamping of the original part allows higher transient voltages before suppression.

Q: Which substitute parts can handle higher transient currents?

A: The 5.0SMDJ series (5.0SMDJ85CA, 5.0SMDJ85CA-T7) and 5.0SMLJ85CA-TP provide 36.5A peak pulse current; SMDJ85CA and SMLJ85CA provide 21.9A and 20.8A respectively. These variants handle significantly higher transient energy compared to the original part's 9.9A rating, with power dissipation ratings of 3000W to 5000W.

Q: Are all substitute parts surface-mount compatible with the original SMCJ85CE3/TR13 footprint?

A: Yes. All substitute parts use DO-214AB or SMC package designations, which are physically equivalent for surface-mount PCB layouts. No footprint modifications are required when substituting any listed part.

Q: What compliance certifications do these substitute parts hold?

A: All listed substitute parts are active products meeting RoHS3 compliance. REACH status varies: SMCJ85CA-TR and most substitutes are REACH Unaffected; SMLJ85CA is REACH Affected. Verify specific REACH requirements for your application and target markets.

Q: Can I substitute a part with a wider operating temperature range?

A: Yes. Parts with wider temperature ranges (such as 5.0SMLJ85CA-TP supporting -55°C to 175°C) are compatible substitutes. The expanded temperature range provides additional design margin in applications subject to extreme environmental conditions.

Q: Which substitute offers the best overall balance of current handling and power dissipation?

A: SMLJ85CA from Bourns Inc. and SMDJ85CA from Alpha & Omega Semiconductor provide a mid-range option with 20.8A to 21.9A peak pulse current and 3000W power dissipation, offering improved transient handling compared to the original part without the highest cost associated with 5000W-rated variants.

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