3KASMC10AHM3_A/I Equivalent & Substitute Parts

Part Overview

The 3KASMC10AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the PAR® series. This component is rated for 10V reverse standoff voltage with a 17V maximum clamping voltage and 177A peak pulse current in a DO-214AB (SMC) surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	3KASMC10AHM3_A/I
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	10V
Voltage - Breakdown (Min)	11.1V
Voltage - Clamping (Max) @ Ipp	17V
Current - Peak Pulse (10/1000µs)	177A
Power - Peak Pulse	3000W (3kW)
Operating Temperature Range	-65°C ~ 185°C (TJ)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 3KASMC10AHM3_A/I is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 10V (Typ)
Voltage - Breakdown (Min): 11.1V
Voltage - Clamping (Max) @ Ipp: 17V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener

Acceptable Variation Parameters:

Current - Peak Pulse (10/1000µs): 88.3A to 177A (substitute parts may have lower peak pulse current ratings while maintaining voltage specifications)
Power - Peak Pulse: 1500W to 3000W (correlates with peak pulse current variation)
Operating Temperature Range: Minimum -55°C to -65°C; Maximum 150°C to 185°C
Moisture Sensitivity Level (MSL): 1 to 3

Substitute parts must maintain identical voltage ratings and package specifications. Peak pulse current and power dissipation may be lower in some alternatives, which is acceptable for applications not requiring the full 177A capability. All substitutes must be RoHS3 compliant and maintain surface mount DO-214AB packaging.

Parameter Comparison

Parameter	3KASMC10AHM3_A/I (Main)	3KASMC10AHM3_B/I	SMCJ10A (Meritek)	SMCJ10A-HR (Littelfuse)	SMCJ10A-HRA (Littelfuse)	SMCJ10A-TP (MCC)	SMDJ10A (AOS)	SMDJ10A-HR (Littelfuse)
Voltage - Reverse Standoff (Typ)	10V	10V	10V	10V	10V	10V	10V	10V
Voltage - Breakdown (Min)	11.1V	11.1V	11.1V	11.1V	11.1V	11.1V	11.1V	11.1V
Voltage - Clamping (Max) @ Ipp	17V	17V	17V	17V	17V	17V	17V	17V
Current - Peak Pulse (10/1000µs)	177A	177A	88.24A	88.3A	88.3A	88.3A	176.5A	176.5A
Power - Peak Pulse	3000W	3000W	1500W	1500W	1500W	1500W	3000W	3000W
Operating Temperature Range	-65°C ~ 185°C	-65°C ~ 185°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 150°C
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): The 3KASMC10AHM3_B/I is the direct Vishay equivalent with identical electrical specifications and operating temperature range (-65°C ~ 185°C). This part maintains the automotive grade classification and AEC-Q101 qualification of the original. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. bulk). This is the preferred substitute when automotive qualification and extended temperature range are required.

High-Performance Alternatives (Full Power Rating): The SMDJ10A (Alpha & Omega Semiconductor) and SMDJ10A-HR (Littelfuse) maintain the 177A peak pulse current and 3000W power dissipation of the original part. Both are RoHS3 compliant and active products. The SMDJ10A-HR extends the lower temperature limit to -65°C, matching the original specification. These alternatives are suitable for applications requiring the full transient suppression capability of the original design.

Cost-Optimized Alternatives (Reduced Power Rating): The SMCJ10A series (Meritek, Littelfuse SMCJ10A-HR/HRA, and Micro Commercial Co SMCJ10A-TP) provide identical voltage ratings with reduced peak pulse current (88.3A) and power dissipation (1500W). These parts are suitable for applications where transient energy levels do not exceed 1500W. All are RoHS3 compliant and active products. The Littelfuse variants maintain the -65°C lower temperature limit.

Selection Criteria by Application:

Automotive applications requiring AEC-Q101 qualification: 3KASMC10AHM3_B/I
High-energy transient suppression (≥3000W): SMDJ10A or SMDJ10A-HR
Standard transient suppression (≤1500W) with cost optimization: SMCJ10A-TP or SMCJ10A-HR
Extended temperature operation (-65°C minimum): 3KASMC10AHM3_B/I, SMCJ10A-HR, SMCJ10A-HRA, or SMDJ10A-HR

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower peak pulse current (88.3A vs. 177A)? A: Yes, if your application's transient energy does not exceed 1500W. The voltage ratings remain identical (10V standoff, 17V clamping), ensuring proper suppression of transient events within the lower power envelope. Verify your circuit's maximum transient energy before selection.

Q: What is the difference between the 3KASMC10AHM3_B/I and other substitutes? A: The 3KASMC10AHM3_B/I is the direct Vishay replacement with identical specifications and automotive qualification (AEC-Q101). Other substitutes from different manufacturers (Littelfuse, Meritek, Alpha & Omega, Micro Commercial Co) are functionally equivalent but may have different power ratings, temperature ranges, or lack automotive certification.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts are RoHS3 compliant, matching the environmental compliance of the original 3KASMC10AHM3_A/I.

Q: Does packaging format affect electrical performance? A: No. Tape & Reel (TR) and bulk packaging formats contain identical die and electrical characteristics. Packaging selection is based on production volume and assembly requirements, not electrical performance.

Q: Which substitute maintains the original operating temperature range (-65°C ~ 185°C)? A: Only the 3KASMC10AHM3_B/I maintains the full original temperature range. Other substitutes have maximum junction temperatures of 150°C to 175°C. For applications requiring operation above 150°C, the 3KASMC10AHM3_B/I is the only suitable alternative.

Q: Can I mix different substitute parts in the same design? A: Yes, provided all parts meet your circuit's voltage and power requirements. However, using a single part number throughout a design simplifies procurement, inventory management, and qualification documentation.

Q: What does "Moisture Sensitivity Level (MSL)" mean for substitutes? A: MSL indicates the maximum time a component can be stored in ambient conditions before soldering. MSL 1 (Unlimited) provides greater flexibility in storage and handling compared to MSL 3 (168 Hours). Most active substitutes have MSL 1, offering superior supply chain flexibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message