SMLJ28CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ28CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 28V reverse standoff voltage and provides 50V clamping protection at peak pulse current, housed in a DO-214AB (SMC) package. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts become necessary when managing supply chain continuity, achieving specific performance targets within application constraints, or accommodating manufacturing design flexibility across compatible device specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28	V
Voltage - Breakdown (Min)	31.1	V
Voltage - Clamping (Max) @ Ipp	50	V
Current - Peak Pulse (10/1000µs)	60	A
Power - Peak Pulse	300	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	-
Type	Zener	-
Bidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMLJ28CE3/TR13 is determined by the following key parameters:

Voltage - Reverse Standoff (Typ): All substitute parts must maintain 28V standoff voltage for circuit protection compatibility
Voltage - Breakdown (Min): All substitutes must support 31.1V minimum breakdown voltage
Package / Case: All substitutes must use DO-214AB or SMC (equivalent mechanical footprint)
Mounting Type: All substitutes must be surface-mount compatible
Type: All substitutes must be Zener-type TVS diodes for equivalent suppression characteristics
Bidirectional Channels: All substitutes must feature 1 bidirectional channel

Parameters such as clamping voltage, peak pulse current, and power dissipation represent design variations that affect performance within the same voltage protection class. Substitute parts with differing peak pulse current or clamping voltage remain functionally compatible with the original design when applied within their respective electrical limits.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package
SMLJ28CE3/TR13	Microchip Technology	28	31.1	50	60	300	-55 to 150	DO-214AB, SMC
5.0SMDJ28CA	MDE Semiconductor Inc	28	31.1	45.4	110	5000	-55 to 150	DO-214AB, SMC
SMC3K28CAHM3/57	Vishay General Semiconductor	28	31.1	45.4	66.1	3000	-55 to 150	DO-214AB, SMC
SMCJ28CA	Fairchild Semiconductor	28	31.1	45.4	33.1	1500	-55 to 150	DO-214AB, SMC
SMCJ28CA-13-F	Diodes Incorporated	28	31.1	45.4	33	1500	-55 to 150	DO-214AB, SMC
SMCJ28CA-TP	Micro Commercial Co	28	31.1	45.4	33.1	1500	-55 to 175	DO-214AB, SMC
SMDJ28CA	Alpha & Omega Semiconductor Inc.	28	31.1	45.4	66.1	3000	-55 to 150	DO-214AB, SMC
SMLJ28CA	Bourns Inc.	28	31.1	45.4	66	3000	-55 to 150	DO-214AB, SMC

Engineering Selection Recommendations

All substitute parts listed maintain active product status and RoHS3 compliance, qualifying them for equivalent circuit protection functionality. The SMC3K28CAHM3/57 (Vishay) holds AEC-Q101 automotive qualification, making this part suitable for applications requiring automotive-grade reliability certification. All remaining substitutes carry unlimited moisture sensitivity ratings (MSL-1) and are suitable for standard commercial and industrial applications.

Selection among compatible substitutes should account for application-specific peak current requirements and thermal dissipation constraints. Parts offering higher peak pulse current ratings (SMDJ28CA, SMLJ28CA at 66+ A) provide margin for surge events exceeding the original 60A specification. Parts with lower peak pulse current ratings (SMCJ28CA-13-F, SMCJ28CA-TP at 33 A) are suitable for applications with constrained surge current profiles. The SMCJ28CA-TP variant supports an extended upper operating temperature of 175°C, accommodating high-temperature application environments.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts replace the SMLJ28CE3/TR13 directly?

A: Yes, all listed substitute parts maintain the same 28V reverse standoff voltage, 31.1V minimum breakdown voltage, and DO-214AB (SMC) package compatibility. Direct mechanical and electrical substitution is supported across all variants without design modification.

Q: What is the difference between the clamping voltage values (50V vs 45.4V)?

A: The SMLJ28CE3/TR13 clamps at a maximum of 50V, while most substitute parts clamp at 45.4V. Both values fall within acceptable transient voltage suppression design windows for 28V-class protected circuits. The lower clamping voltage of substitutes provides tighter voltage control during transient events, while the original part allows slightly higher transient peaks. Selection depends on protected component voltage rating tolerances.

Q: Why do substitute parts show different peak pulse current ratings?

A: Peak pulse current ratings reflect internal design variations and silicon chip sizing across manufacturers. Parts rated at higher peak pulse current (110A for 5.0SMDJ28CA, 66A for SMC3K28CAHM3/57 and SMDJ28CA) are suitable for applications experiencing high-energy surge events. Parts at lower ratings (33-33.1A for SMCJ28CA variants) are appropriate for moderate surge environments. Selection is determined by actual circuit transient current profiles, not by choosing the highest available rating.

Q: Are there any certification or compliance differences?

A: All parts comply with RoHS3 requirements. The SMC3K28CAHM3/57 (Vishay) holds AEC-Q101 automotive qualification, making it mandatory for automotive circuit protection applications. All remaining parts are suitable for commercial and industrial use without automotive certification requirements.

Q: What about the extended operating temperature on SMCJ28CA-TP?

A: The SMCJ28CA-TP supports operation up to 175°C (junction temperature), compared to 150°C for most other variants. This extended temperature capability is necessary only in high-temperature application environments; standard designs operating below 150°C can use any listed substitute.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message