SMLJ90AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ90AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose voltage transient protection in surface mount applications. This component features a 90V reverse standoff voltage with 146V maximum clamping voltage and 20.6A peak pulse current capacity. The part is active and available in high inventory, making it widely accessible for current designs. Alternative equivalent and substitute parts are necessary to address supply chain flexibility, regional supplier availability, and application-specific requirements that may benefit from different thermal or power ratings.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	90	V
Voltage - Breakdown (Min)	100	V
Voltage - Clamping (Max) @ Ipp	146	V
Current - Peak Pulse (10/1000µs)	20.6	A
Power - Peak Pulse	300	W
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package	DO-214AB, SMC	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution criteria for the SMLJ90AE3/TR13 are based on the following key electrical and mechanical parameters: voltage ratings (reverse standoff, breakdown, and clamping), peak pulse current capacity, package compatibility (DO-214AB / SMC form factor), and operating temperature range. All substitute parts listed maintain identical voltage specifications (90V standoff, 100V breakdown minimum, 146V clamping maximum) and the same surface mount package footprint, ensuring direct drop-in compatibility.

Substitute parts are grouped into three categories:

Direct Electrical Equivalents: Parts with identical electrical specifications and interchangeable peak pulse current ratings (20.6A nominal), suitable for straightforward replacement without circuit re-evaluation.

Higher Performance Substitutes: Parts with increased peak pulse current (34.3A) and enhanced power dissipation (5000W vs. 300W), applicable when thermal margin or transient severity demands additional headroom.

Lower Performance Substitutes: Parts with reduced peak pulse current (10.3A) and lower power dissipation (1500W vs. 300W), applicable for circuits with less severe transient exposure or space-constrained designs.

All substitute parts share the critical voltage specifications and surface mount package requirements. RoHS3 compliance and MSL ratings are maintained across direct equivalents.

Parameter Comparison

Manufacturer / Part Number	V_RWM (V)	V_BR Min (V)	V_CL Max (V)	Ipp (A)	P_Peak (W)	T_J Range (°C)	Package
Microchip / SMLJ90AE3/TR13	90	100	146	20.6	300	-55 to 150	DO-214AB
Direct Electrical Equivalents (20.6A nominal)
Central Semiconductor / 3SMC90A TR13 PBFREE	90	100	146	20.6	3000	-65 to 150	DO-214AB
Alpha & Omega / SMDJ90A	90	100	146	20.6	3000	-55 to 150	DO-214AB
Bourns / SMLJ90A	90	100	146	20.6	3000	-55 to 150	DO-214AB
Higher Performance Substitutes (34.3A nominal)
Taiwan Semiconductor / 5.0SMDJ90A	90	100	146	34.3	5000	-55 to 175	DO-214AB
Littelfuse / 5.0SMDJ90A-T7	90	100	146	34.3	5000	-65 to 150	DO-214AB
Lower Performance Substitutes (10.3A nominal)
Fairchild Semiconductor / SMCJ90A	90	100	146	10.3	1500	-55 to 150	DO-214AB
Diodes Incorporated / SMCJ90A-13-F	90	100	146	10.3	1500	-55 to 150	DO-214AB

Engineering Selection Recommendations

For Direct Replacement: Central Semiconductor 3SMC90A TR13 PBFREE, Alpha & Omega SMDJ90A, and Bourns SMLJ90A provide electrical and thermal equivalence with the original SMLJ90AE3/TR13. All three maintain identical voltage ratings and peak pulse current specifications. The Central Semiconductor part offers extended operating temperature range (-65°C to 150°C) and higher power dissipation (3000W vs. 300W), providing enhanced thermal margin with active product status and ROHS3 compliance.

For Enhanced Transient Protection: Taiwan Semiconductor 5.0SMDJ90A and Littelfuse 5.0SMDJ90A-T7 offer superior pulse current handling (34.3A) and power dissipation (5000W), applicable to circuits experiencing higher transient severity or requiring extended thermal safety margins. Both parts maintain active product status and ROHS3 compliance. Operating temperature capabilities extend to 175°C (Taiwan Semiconductor) and -65°C lower bound (Littelfuse), accommodating more demanding environments.

For Space-Constrained or Lower-Stress Applications: Fairchild Semiconductor SMCJ90A and Diodes Incorporated SMCJ90A-13-F deliver voltage protection with reduced peak current ratings (10.3A) and power dissipation (1500W). These parts maintain identical voltage specifications and package compatibility while supporting applications with less severe transient exposure. Diodes Incorporated variant includes Tape & Reel packaging with ROHS3 compliance and MSL Level 1 rating.

All substitute parts are active products with ROHS3 compliance suitable for contemporary electronic designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SMLJ90AE3/TR13 with any of the listed parts?

A: Substitution is possible for all listed parts provided the circuit requirements match the peak pulse current and power dissipation ratings. The SMLJ90AE3/TR13 operates at 20.6A peak pulse current with 300W peak power. Direct replacements (3SMC90A, SMDJ90A, SMLJ90A) maintain these specifications. Higher-performance variants (5.0SMDJ90A, 5.0SMDJ90A-T7) with 34.3A and 5000W exceed these requirements and are suitable for designs requiring additional margin. Lower-performance variants (SMCJ90A, SMCJ90A-13-F) with 10.3A and 1500W are suitable only for applications with reduced transient severity.

Q: Are all substitute parts pin-for-pin compatible?

A: All listed parts use the DO-214AB (SMC) surface mount package. Pin-for-pin and footprint compatibility are maintained across all substitutes. No circuit board layout changes are required.

Q: What are the key voltage specifications I must verify?

A: All listed parts maintain identical voltage ratings: 90V reverse standoff, 100V minimum breakdown voltage, and 146V maximum clamping voltage. These specifications define the protection threshold and response of the TVS diode and are consistent across all alternatives.

Q: Do substitute parts meet the same compliance standards?

A: Direct equivalents (Central Semiconductor, Alpha & Omega, Bourns) maintain ROHS3 compliance and MSL Level 1 ratings matching the original part. Higher-performance variants maintain ROHS3 compliance; confirm individual datasheets for MSL ratings when moisture sensitivity is a design constraint. Lower-performance variants from Diodes Incorporated include ROHS3 compliance and MSL Level 1; Fairchild Semiconductor variants require datasheet verification for MSL specifications.

Q: What operating temperature ranges are available?

A: The SMLJ90AE3/TR13 operates from -55°C to 150°C. Extended lower-temperature operation (-65°C) is available with Central Semiconductor and Littelfuse parts. Extended upper-temperature operation (175°C) is available with Taiwan Semiconductor. Standard -55°C to 150°C operation is maintained by Alpha & Omega, Bourns, and both Fairchild and Diodes variants.

Q: Which substitute should I select for maximum thermal headroom?

A: Taiwan Semiconductor 5.0SMDJ90A and Littelfuse 5.0SMDJ90A-T7 provide 5000W peak power dissipation versus the original 300W rating, representing a 16.7× increase in thermal capacity. Both maintain identical voltage protection specifications. Select based on whether your application requires extended transient suppression margin or operates in elevated ambient temperature environments.

Q: Are these parts suitable for telecom applications?

A: Littelfuse 5.0SMDJ90A-T7 is designated for telecom applications. Other parts are classified for general-purpose use. Verify application-specific requirements with component datasheets when telecom or other specialized electrical environment qualification is required.

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