SMLJ160A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMLJ160A is a unidirectional transient voltage suppressor diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 160V reverse standoff voltage and provides 259V maximum clamping voltage at peak pulse current. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching core electrical parameters: reverse standoff voltage (160V), breakdown voltage (178V minimum), clamping voltage (259V maximum), unidirectional channel configuration, surface-mount packaging (DO-214AB/SMC), and operating temperature range (-55°C to 150°C).

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	160	V
Voltage - Breakdown (Min)	178	V
Voltage - Clamping (Max) @ Ipp	259	V
Current - Peak Pulse (10/1000µs)	11.6	A
Power - Peak Pulse	3000	W
Unidirectional Channels	1	—
Package / Case	DO-214AB, SMC	—
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the SMLJ160A are classified into two categories based on electrical parameter alignment:

Direct Equivalents maintain identical electrical specifications across all critical parameters: 160V reverse standoff voltage, 178V minimum breakdown voltage, 259V maximum clamping voltage, 11.6A peak pulse current, and 3000W peak pulse power. These parts are pin-compatible and functionally interchangeable in circuit applications.

Similar Substitutes share the same voltage ratings (160V standoff, 178V breakdown, 259V clamping) and package form factor but differ in peak pulse current and power dissipation ratings. These parts provide enhanced performance characteristics in specific application scenarios where higher current handling or power dissipation is beneficial.

The substitution logic is based strictly on the following parameters:

Voltage - Reverse Standoff: 160V
Voltage - Breakdown (Min): 178V
Voltage - Clamping (Max): 259V
Unidirectional Channels: 1
Package / Case: DO-214AB, SMC
Operating Temperature: -55°C to 150°C

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Product Status	RoHS Status
SMLJ160A	Bourns Inc.	160V	178V	259V	11.6A	3000W	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ160A	Alpha & Omega Semiconductor Inc.	160V	178V	259V	11.6A	3000W	DO-214AB, SMC	Active	ROHS3 Compliant
5.0SMDJ160A	MDE Semiconductor Inc	160V	178V	259V	19.3A	5000W	DO-214AB, SMC	Active	ROHS3 Compliant
SMCJ160A	Fairchild Semiconductor	160V	178V	259V	5.8A	1500W	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment with the original SMLJ160A component.

SMDJ160A (Alpha & Omega Semiconductor Inc.) provides direct electrical and functional equivalence with identical peak pulse current (11.6A) and power dissipation (3000W). This part is suitable for direct replacement in existing designs without circuit modification.

5.0SMDJ160A (MDE Semiconductor Inc) offers enhanced performance with 19.3A peak pulse current and 5000W power dissipation while maintaining identical voltage specifications. This part is applicable in applications requiring higher transient energy absorption or where design margins for current handling are prioritized.

SMCJ160A (Fairchild Semiconductor) provides reduced peak pulse current (5.8A) and power dissipation (1500W) while maintaining voltage compatibility. This part is suitable for applications with lower transient current requirements or where cost optimization is a design consideration.

Frequently Asked Questions (FAQ)

Q: Can SMDJ160A be used as a direct replacement for SMLJ160A? A: Yes. SMDJ160A maintains identical electrical specifications: 160V reverse standoff voltage, 259V clamping voltage, 11.6A peak pulse current, and 3000W peak pulse power. Both components use DO-214AB/SMC packaging and operate across the same temperature range (-55°C to 150°C).

Q: What is the difference between SMLJ160A and 5.0SMDJ160A? A: Both parts share identical voltage ratings (160V standoff, 259V clamping). The primary difference is peak pulse current and power dissipation: SMLJ160A handles 11.6A at 3000W, while 5.0SMDJ160A handles 19.3A at 5000W. The 5.0SMDJ160A provides enhanced transient protection capability.

Q: Is SMCJ160A compatible with SMLJ160A in terms of voltage protection? A: Yes, voltage compatibility is maintained. SMCJ160A provides the same 160V reverse standoff and 259V clamping voltage. However, it has reduced peak pulse current (5.8A) and power dissipation (1500W) compared to SMLJ160A (11.6A, 3000W). Selection depends on application transient current requirements.

Q: Are all substitute parts available in the same packaging? A: All listed parts use DO-214AB/SMC surface-mount packaging, ensuring mechanical and footprint compatibility. Packaging differences exist only in supply format (tape & reel versus bulk), which does not affect circuit performance.

Q: Do all substitute parts meet RoHS3 compliance? A: Yes. SMLJ160A, SMDJ160A, 5.0SMDJ160A, and SMCJ160A are all RoHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What operating temperature range applies to all substitute parts? A: All parts operate across -55°C to 150°C junction temperature (TJ), providing consistent thermal performance across the product family.

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