3KASMC30AHM3_A/I Equivalent & Substitute Parts

Part Overview

The 3KASMC30AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMC) package. This component is rated for 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 62A peak pulse current capability. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	62A
Power - Peak Pulse	3000W
Type	Zener
Unidirectional Channels	1
Operating Temperature Range	-65°C ~ 185°C (TJ)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3KASMC30AHM3_A/I is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage ratings must match exactly: 30V reverse standoff, 33.3V minimum breakdown, and 48.4V maximum clamping voltage. Current handling capability must equal or exceed 62A peak pulse current at the 10/1000µs waveform. Power dissipation must support 3000W peak pulse rating. Package configuration must be DO-214AB (SMC) surface mount. All substitute parts must maintain unidirectional (single channel) topology with Zener diode type classification.

Acceptable variations include different manufacturers, packaging formats (Tape & Reel versus Cut Tape), and minor operating temperature range differences within the automotive or general-purpose grade classifications. RoHS3 compliance and MSL 1 rating are maintained across all substitutes.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status	Package
3KASMC30AHM3_A/I	Vishay General Semiconductor	30V	48.4V	62A	3000W	-65°C ~ 185°C	Obsolete	DO-214AB (SMCJ)
3KASMC30AHM3_B/I	Vishay General Semiconductor	30V	48.4V	62A	3000W	-65°C ~ 185°C	Active	DO-214AB (SMC)
3.0SMCJ30A-13	Diodes Incorporated	30V	48.4V	62A	3000W	-55°C ~ 175°C	Active	DO-214AB (SMC)
3SMC30A TR13 PBFREE	Central Semiconductor Corp	30V	48.4V	62A	3000W	-65°C ~ 150°C	Active	DO-214AB (SMC)
SM30T35AY	STMicroelectronics	30V	48.4V	62A	3000W	-55°C ~ 175°C	Active	DO-214AB (SMC)
SMC30J30A	STMicroelectronics	30V	48.4V	62A	3000W	-55°C ~ 175°C	Active	DO-214AB (SMC)
SMDJ30A-HR	Littelfuse Inc.	30V	48.4V	62A	3000W	-65°C ~ 150°C	Active	DO-214AB (SMCJ)
SMDJ30A-HRA	Littelfuse Inc.	30V	48.4V	62A	3000W	-65°C ~ 150°C	Active	DO-214AB (SMCJ)
SMLJ30A-TP	Micro Commercial Co	30V	48.4V	62A	3000W	-55°C ~ 175°C	Active	DO-214AB (SMC)
SMLJ30AE3/TR13	Microchip Technology	30V	48.4V	62A	3000W	-55°C ~ 150°C	Active	DO-214AB
TPSMD30A	Littelfuse Inc.	30V	48.4V	62A	3000W	-65°C ~ 150°C	Active	DO-214AB (SMCJ)

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical equivalence to the 3KASMC30AHM3_A/I. Selection should prioritize active product status parts to ensure long-term availability and supply chain stability.

For applications requiring the extended upper operating temperature range of -65°C ~ 185°C, the 3KASMC30AHM3_B/I (Vishay) provides direct compatibility as an active variant of the original manufacturer's product line.

For automotive-grade applications with AEC-Q101 qualification, SM30T35AY (STMicroelectronics) and TPSMD30A (Littelfuse) are qualified options. All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating.

Packaging format selection between Tape & Reel (TR) and Cut Tape (CT) configurations does not affect electrical performance and should be determined by procurement and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 3KASMC30AHM3_A/I with any of the listed parts?

A: Yes. All listed parts meet the electrical specifications (30V standoff, 48.4V clamping, 62A peak pulse) and mechanical requirements (DO-214AB SMC package, surface mount). Selection should account for operating temperature range requirements and product availability status.

Q: What is the difference between the 3KASMC30AHM3_A/I and 3KASMC30AHM3_B/I?

A: Both parts are electrically identical with matching voltage and current ratings. The primary difference is product status: the A/I variant is obsolete, while the B/I variant is active. The B/I is the recommended direct replacement from Vishay.

Q: Do operating temperature range differences affect substitution?

A: Operating temperature range differences are acceptable for substitution provided the application's actual operating conditions fall within the substitute part's specified range. The original part operates from -65°C ~ 185°C. Substitutes with narrower ranges (such as -55°C ~ 175°C) are suitable for applications not requiring the full extended temperature capability.

Q: Are there differences between DO-214AB (SMCJ) and DO-214AB (SMC) package designations?

A: Both designations refer to the same physical DO-214AB package used for surface mount diodes. The SMCJ and SMC suffixes are manufacturer-specific nomenclature variants and do not indicate functional differences. All parts are mechanically compatible.

Q: Which substitute offers the best long-term availability?

A: All listed substitutes carry active product status. Availability should be confirmed with component distributors. Parts from major manufacturers such as STMicroelectronics, Littelfuse, and Diodes Incorporated typically maintain consistent supply channels.

Q: Can I use SMLJ30AE3/TR13 if my application requires 3000W peak pulse power?

A: No. SMLJ30AE3/TR13 is rated for 300W peak pulse power, which is insufficient for applications requiring the 3000W specification of the original part. This part is not a suitable substitute for high-power transient suppression applications.

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