3KASMC36HE3_A/I Equivalent & Substitute Parts

Part Overview

The 3KASMC36HE3_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 operates with a 36V reverse standoff voltage and provides 3000W peak pulse power protection. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	36	V
Voltage - Breakdown (Min)	40	V
Voltage - Clamping (Max) @ Ipp	64.3	V
Current - Peak Pulse (10/1000µs)	46.7	A
Power - Peak Pulse	3000	W
Operating Temperature Range	-65 to 185	°C (TJ)
Package / Case	DO-214AB, SMC	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the 3KASMC36HE3_A/I is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 36V (nominal)
Voltage - Breakdown (Min): 40V
Package / Case: DO-214AB, SMC (surface mount)
Type: Zener, unidirectional
Unidirectional Channels: 1

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: Substitute parts may vary from 58.1V to 64.3V
Current - Peak Pulse (10/1000µs): Substitute parts may range from 25.8A to 86.1A
Power - Peak Pulse: Substitute parts may range from 600W to 5000W
Operating Temperature Range: Substitute parts must support minimum -55°C to maximum 150°C overlap with original specification

Substitute parts are grouped into two categories:

Category 1 - Direct Manufacturer Equivalents (Same Base Product Number): Parts sharing the base product number 3KASMC36 or 5.0SMDJ36 with identical voltage ratings and package specifications.

Category 2 - Cross-Manufacturer Alternatives (Functional Equivalents): Parts from alternative manufacturers meeting identical voltage and package requirements with comparable or enhanced electrical performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Operating Temp (°C)	Product Status
3KASMC36HE3_A/I	Vishay	36	40	64.3	46.7	3000	DO-214AB, SMC	-65 to 185	Obsolete
3KASMC36AHE3_B/I	Vishay	36	40	58.1	51.6	3000	DO-214AB, SMC	-65 to 185	Active
5.0SMDJ36A	Taiwan Semiconductor Corporation	36	40	58.1	86.1	5000	DO-214AB, SMC	-55 to 175	Active
5.0SMDJ36A-T7	Littelfuse Inc.	36	40	58.1	86.1	5000	DO-214AB, SMC	-65 to 150	Active
SMCJ36A	EVVO Semi	36	40	58.1	25.9	600	DO-214AC, SMA	-65 to 150	Active
SMCJ36A-13-F	Diodes Incorporated	36	40	58.1	25.8	1500	DO-214AB, SMC	-55 to 150	Active
SMCJ36A-TP	Micro Commercial Co	36	40	58.1	25.9	1500	DO-214AB, SMC	-55 to 175	Active
SMDJ36A	EVVO Semi	36	40	58.1	—	—	DO-214AB, SMC	—	Active
SMDJ36A-T7	Littelfuse Inc.	36	40	58.1	51.6	3000	DO-214AB, SMC	-65 to 150	Active

Engineering Selection Recommendations

Primary Recommendation: 3KASMC36AHE3_B/I

This part is the direct active equivalent from the original manufacturer Vishay. It maintains the same base product number (3KASMC36), identical voltage specifications (36V standoff, 40V breakdown minimum), and equivalent package configuration (DO-214AB, SMC). The part carries active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Operating temperature range (-65°C to 185°C) matches the original specification. Current inventory of 797 pieces supports immediate availability.

Secondary Recommendation: SMDJ36A-T7 (Littelfuse Inc.)

This part meets all critical electrical parameters with 36V standoff voltage, 40V breakdown minimum, and DO-214AB SMC package. It provides enhanced peak pulse current (51.6A) and maintains 3000W power rating equivalent to the original. AEC-Q101 qualification and ROHS3 compliance are confirmed. Operating temperature range (-65°C to 150°C) provides adequate overlap with original specification. Active product status with 2200 pieces in inventory.

Alternative for Enhanced Power Handling: 5.0SMDJ36A-T7 (Littelfuse Inc.)

When higher transient energy absorption is required, this part offers 5000W peak pulse power with 86.1A peak pulse current while maintaining identical voltage specifications and DO-214AB SMC package. AEC-Q101 qualification and ROHS3 compliance are confirmed. Operating temperature range (-65°C to 150°C) provides adequate coverage. Active product status with 1500 pieces in inventory.

Package Consideration: SMCJ36A (EVVO Semi, Diodes Incorporated, Micro Commercial Co)

These parts maintain voltage specifications but use DO-214AC SMA package (EVVO Semi) or DO-214AB SMC package (Diodes Incorporated, Micro Commercial Co). Peak pulse current is reduced to 25.8–25.9A with power ratings of 600W to 1500W. These are suitable only for applications with lower transient energy requirements. All carry ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can 3KASMC36AHE3_B/I directly replace 3KASMC36HE3_A/I?

A: Yes. Both parts share the same base product number (3KASMC36), identical voltage specifications (36V standoff, 40V breakdown minimum), and equivalent DO-214AB SMC package. The primary difference is product status (active vs. obsolete) and minor variation in clamping voltage (58.1V vs. 64.3V), which remains within acceptable substitution parameters.

Q: What is the difference between DO-214AB (SMC) and DO-214AC (SMA) packages?

A: DO-214AB (SMC) and DO-214AC (SMA) are distinct surface mount packages with different footprints and current handling capabilities. DO-214AB is larger and supports higher current ratings. Direct PCB footprint compatibility cannot be assumed between these packages. Verify PCB layout compatibility before substitution.

Q: Can I use SMCJ36A-TP instead of 3KASMC36HE3_A/I?

A: SMCJ36A-TP maintains identical voltage specifications (36V standoff, 40V breakdown minimum) and DO-214AB SMC package compatibility. However, peak pulse current is reduced to 25.9A with 1500W power rating compared to the original 46.7A and 3000W. This substitution is valid only if circuit transient energy requirements do not exceed 1500W.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original part specification.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. All recommended substitute parts carry this qualification, ensuring suitability for automotive and industrial applications requiring equivalent reliability assurance.

Q: Can I use 5.0SMDJ36A instead of the original part?

A: Yes, with consideration for operating temperature range. The 5.0SMDJ36A maintains identical voltage specifications and DO-214AB SMC package. It provides enhanced peak pulse current (86.1A) and power rating (5000W). However, operating temperature range is -55°C to 175°C, which does not extend to the original -65°C minimum. Verify application temperature requirements before substitution.

Q: What determines whether a part can substitute for 3KASMC36HE3_A/I?

A: Substitution is determined by matching: (1) Voltage - Reverse Standoff at 36V nominal, (2) Voltage - Breakdown minimum at 40V, (3) Package type DO-214AB SMC, and (4) Unidirectional Zener type with single channel. Peak pulse current and power rating may vary based on application requirements, provided the substitute part meets or exceeds the original specification or application circuit tolerance.

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