3KASMC11AHE3_A/I Equivalent & Substitute Parts

Part Overview

The 3KASMC11AHE3_A/I is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 11V reverse standoff with 18.2V maximum clamping voltage. This component is classified as obsolete, necessitating identification of active equivalent parts that maintain identical electrical and mechanical specifications for continued system support and new design implementations.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	11V
Voltage - Breakdown (Min)	12.2V
Voltage - Clamping (Max) @ Ipp	18.2V
Current - Peak Pulse (10/1000µs)	165A
Power - Peak Pulse	3000W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature Range	-65°C ~ 185°C (TJ)
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: reverse standoff voltage (11V), breakdown voltage minimum (12.2V), maximum clamping voltage (18.2V), package type (DO-214AB/SMC), mounting configuration (surface mount), and unidirectional channel count (1). Parts are grouped into two categories based on peak pulse current rating:

Category A - Full Specification Match (165A Ipp, 3000W): Parts maintaining identical peak pulse current and power dissipation specifications as the original 3KASMC11AHE3_A/I.

Category B - Reduced Specification (82.5A Ipp, 1500W): Parts with lower peak pulse current and power ratings that share voltage parameters and package configuration but operate at reduced transient energy levels.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	Product Status
3KASMC11AHE3_A/I	Vishay General Semiconductor	11V	18.2V	165A	3000W	DO-214AB (SMCJ)	-65°C ~ 185°C	Obsolete
3KASMC11AHE3_B/I	Vishay General Semiconductor	11V	18.2V	165A	3000W	DO-214AB (SMC)	-65°C ~ 185°C	Active
SMDJ11A	Alpha & Omega Semiconductor Inc.	11V	18.2V	164.9A	3000W	DO-214AB	-55°C ~ 150°C	Active
SMDJ11A-HR	Littelfuse Inc.	11V	18.2V	164.8A	3000W	DO-214AB (SMCJ)	-65°C ~ 150°C	Active
SMDJ11A-HRA	Littelfuse Inc.	11V	18.2V	164.8A	3000W	DO-214AB (SMCJ)	-65°C ~ 150°C	Active
SMCJ11A	Fairchild Semiconductor	11V	18.2V	82.5A	1500W	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMCJ11A-HRA	Littelfuse Inc.	11V	18.2V	82.5A	1500W	DO-214AB (SMCJ)	-65°C ~ 150°C	Active
SMCJ11A-HRAT7	Littelfuse Inc.	11V	18.2V	82.5A	1500W	DO-214AB (SMCJ)	-65°C ~ 150°C	Active
SMCJ11A-TP	Micro Commercial Co	11V	18.2V	82.5A	1500W	DO-214AB (SMC)	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Replacement (Preferred): The 3KASMC11AHE3_B/I is the primary direct substitute, offering identical electrical specifications and temperature range while maintaining active product status. This part is available in tape and reel packaging and carries the same Vishay PAR® series designation.

Full Specification Equivalents: SMDJ11A, SMDJ11A-HR, and SMDJ11A-HRA maintain the 165A peak pulse current and 3000W power dissipation of the original part. SMDJ11A-HR and SMDJ11A-HRA extend the lower operating temperature limit to -65°C, matching the original specification. These parts are manufactured by Alpha & Omega Semiconductor and Littelfuse, both active suppliers with established automotive-grade qualifications.

Reduced Specification Alternatives: SMCJ11A variants (Fairchild Semiconductor, Littelfuse, Micro Commercial Co) provide voltage equivalence and package compatibility but operate at 82.5A peak pulse current and 1500W power dissipation. These parts are suitable only for applications where transient energy requirements do not exceed 1500W. SMCJ11A-TP extends the upper operating temperature to 175°C.

Compliance Considerations: All recommended substitutes maintain RoHS3 compliance and REACH unaffected status. Automotive-grade parts (SMDJ11A-HR, SMDJ11A-HRA, SMCJ11A-HRA, SMCJ11A-HRAT7) carry AEC-Q101 qualification where specified in source data.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11A parts replace 3KASMC11AHE3_A/I in all applications?

A: SMCJ11A variants are voltage and package equivalents but operate at half the peak pulse current (82.5A vs 165A) and half the power dissipation (1500W vs 3000W). Substitution is valid only for applications where transient energy does not exceed 1500W. Review circuit transient specifications before selection.

Q: What is the difference between 3KASMC11AHE3_A/I and 3KASMC11AHE3_B/I?

A: Both parts are electrically identical with matching voltage, current, and power specifications. The primary difference is packaging: 3KASMC11AHE3_A/I uses SMCJ packaging while 3KASMC11AHE3_B/I uses SMC packaging in tape and reel format. The 3KASMC11AHE3_B/I is active and recommended for new designs.

Q: Are SMDJ11A and SMCJ11A interchangeable?

A: No. SMDJ11A maintains 165A peak pulse current and 3000W power rating, while SMCJ11A operates at 82.5A and 1500W. Both share the same voltage specifications and DO-214AB package, but differ significantly in transient handling capability. Application requirements determine which is appropriate.

Q: Do all substitute parts support the full -65°C to 185°C operating range?

A: No. The original 3KASMC11AHE3_A/I operates to 185°C. Most active substitutes limit upper temperature to 150°C, with SMCJ11A-TP extending to 175°C. SMDJ11A-HR and SMDJ11A-HRA maintain the -65°C lower limit. Verify thermal requirements against specific part specifications.

Q: What packaging formats are available for these TVS diodes?

A: All parts use DO-214AB (SMC/SMCJ) surface mount packages. Packaging options include bulk, tape and reel (TR), and reel configurations. Verify packaging format requirements for automated assembly processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message