SMLJ90E3/TR13 Equivalent and Substitute Parts

Part Overview

The SMLJ90E3/TR13 is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient protection applications. The device features a 90V reverse standoff voltage and 160V maximum clamping voltage with 18.8A peak pulse current in a surface-mount DO-214AB (SMC) package. This part is actively produced and ROHS3 compliant. Alternative models become necessary when addressing specific application requirements for peak pulse current capacity, clamping voltage performance, power dissipation capability, or thermal operating range specifications.

Key Parameters

Parameter	SMLJ90E3/TR13
Manufacturer	Microchip Technology
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	90V
Voltage - Breakdown (Min)	100V
Voltage - Clamping (Max) @ Ipp	160V
Current - Peak Pulse (10/1000µs)	18.8A
Power - Peak Pulse	300W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SMLJ90E3/TR13 are selected based on electrical equivalence across the following critical parameters:

Voltage - Reverse Standoff: 90V (matching nominal specification)
Voltage - Breakdown (Min): 100V (matching minimum specification)
Unidirectional Channels: 1 (functional equivalence)
Package / Case: DO-214AB, SMC (mechanical and thermal equivalence)
Mounting Type: Surface Mount (assembly compatibility)

All qualified substitutes maintain the same 90V reverse standoff voltage and 100V minimum breakdown voltage as the primary part. Variations in clamping voltage, peak pulse current, and power dissipation are permissible when the application design accommodates higher current handling or different clamping characteristics. All substitutes are surface-mount devices in DO-214AB/SMC packaging.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Power - Peak Pulse	Temp Range (°C)	Package	Product Status
SMLJ90E3/TR13	Microchip Technology	90	100	160	18.8	300W	-55 ~ 150	DO-214AB, SMC	Active
5.0SMDJ90A	Taiwan Semiconductor Corporation	90	100	146	34.3	5000W	-55 ~ 175	DO-214AB, SMC	Active
SMCJ90A	Fairchild Semiconductor	90	100	146	10.3	1500W	-55 ~ 150	DO-214AB, SMC	Active
SMCJ90A-13-F	Diodes Incorporated	90	100	146	10.3	1500W	-55 ~ 150	DO-214AB, SMC	Active
SMDJ90A	Alpha & Omega Semiconductor Inc.	90	100	146	20.6	3000W	-55 ~ 150	DO-214AB, SMC	Active
SMLJ90A	Bourns Inc.	90	100	146	20.6	3000W	-55 ~ 150	DO-214AB, SMC	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance. SMCJ90A-13-F (Diodes Incorporated) and SMLJ90A (Bourns Inc.) both carry explicit ROHS3 certification documentation. The 5.0SMDJ90A (Taiwan Semiconductor Corporation) offers the highest power dissipation capability (5000W) and extended operating temperature range (-55°C ~ 175°C), suitable for thermal-demanding applications. SMDJ90A (Alpha & Omega Semiconductor Inc.) and SMLJ90A provide mid-range power handling (3000W) with matching thermal specifications to the primary part.

Selection should be based on the specific application requirements for peak pulse current handling and thermal dissipation limits. The SMCJ90A variants offer conservative specifications suitable for lower-current transient events. The 5.0SMDJ90A supports substantially higher energy absorption with superior high-temperature performance.

Frequently Asked Questions (FAQ)

Q: What makes these parts electrically equivalent to the SMLJ90E3/TR13?

All substitute parts maintain the same 90V reverse standoff voltage and 100V minimum breakdown voltage, ensuring identical dc circuit protection thresholds. The 1-channel unidirectional configuration and DO-214AB/SMC surface-mount package provide functional and mechanical compatibility.

Q: Can I use the SMCJ90A instead of SMLJ90E3/TR13 in my application?

The SMCJ90A is a direct mechanical and electrical substitute with matching standoff and breakdown voltages. The lower peak pulse current specification (10.3A versus 18.8A) requires validation that your transient event characteristics do not exceed this rating. The 146V clamping voltage is lower than the primary part, providing slightly better protection margin.

Q: What is the difference between 146V and 160V clamping voltage?

The SMLJ90E3/TR13 clamps at 160V maximum, while most substitutes clamp at 146V. Lower clamping voltage provides tighter transient suppression and reduced voltage overshoot on protected circuits. This is advantageous for sensitive downstream components. Applications designed for the 160V clamping specification should evaluate the 146V alternatives for voltage margin adequacy.

Q: Are all these parts suitable for tape-and-reel automated assembly?

Most substitutes are available in tape-and-reel packaging (5.0SMDJ90A, SMCJ90A-13-F, SMDJ90A, SMLJ90A). The SMCJ90A from Fairchild Semiconductor is available in bulk packaging. Verify packaging availability with your supplier for high-volume manufacturing requirements.

Q: Does operating temperature range affect my selection?

The SMLJ90E3/TR13 operates from -55°C to 150°C. The 5.0SMDJ90A extends this to 175°C, providing margin for high-temperature environments. All other substitutes match the -55°C to 150°C specification. Select the extended-temperature variant only if your application board temperatures regularly exceed 150°C junction temperature.

Q: Why would I choose the 5.0SMDJ90A with 5000W over the primary part at 300W?

The 5.0SMDJ90A accommodates higher-energy transient pulses without performance degradation. Applications experiencing repetitive or high-amplitude transient events benefit from increased power dissipation capacity. The higher current handling (34.3A) also suits protection of lower-impedance circuit nodes.

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