My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC20AHM3_A/H
- Part No.:
- 3KASMC20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC20AHM3_A/H.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC20AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 20 V stand-off voltage, 22.2–24.5 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 µs), 92.6 A peak surge current, and 32.4 V clamping voltage - deployed for automotive power line and sensor signal line protection.
For engineers reviewing the 3KASMC20AHM3_A/H datasheet, 3KASMC20AHM3_A/H pinout, 3KASMC20AHM3_A/H application, or 3KASMC20AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction temperature rating, MSL Level 1 reflow compatibility, and DO-214AB mechanical footprint compliance.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature operation up to TJ = 185 °C and withstand repetitive surge stress per IEC 61000-4-5. Its low incremental surge resistance and fast response time ensure effective suppression of transients induced by inductive load switching.
The device operates exclusively in unidirectional mode with cathode band marking, supports 200 A non-repetitive forward surge (8.3 ms half-sine), and delivers 32.4 V clamping at 92.6 A IPPM - verified under standardized 10/1000 µs waveform conditions per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - ensures reliable breakdown initiation within tight tolerance band |
| VC @ IPPM | 32.4 V at 92.6 A - clamping voltage limits downstream IC stress during 3000 W transient events |
| PPPM | 3000 W (10/1000 µs) - enables robust protection against automotive load dump and ISO 7637-2 pulses |
| TJ max. | +185 °C - supports under-hood automotive applications without derating penalties |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements |
| MSL Level | Level 1 (260 °C peak) - compatible with standard lead-free reflow profiles without preconditioning |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Clamping terminal | Marked with color band; connected to protected line - conducts during overvoltage to clamp to VC |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term stability under thermal cycling and humidity |
| High-temperature capability | TJ = 185 °C rating allows direct placement near hot components (e.g., power MOSFETs, ECUs) |
| Low clamping ratio | VC/VBR ≈ 1.39 - minimizes overvoltage margin while maintaining safe margin above VWM |
| Fast response time | < 1.0 ps typical - suppresses ESD and fast transients before sensitive circuitry reacts |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) - survives repeated motor-commutation surges in automotive body control modules |
Applications
| Automotive Power Line Protection | Engine Control Unit (ECU) Signal Lines |
|---|---|
Use Scenario: Protecting 12 V battery-fed circuits against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp overvoltage spikes. Use Value: 3000 W PPPM and 32.4 V clamping prevent damage to voltage regulators and microcontrollers during 120 V/100 ms transients. |
Use Scenario: Shielding CAN, LIN, or analog sensor inputs (e.g., MAP, TPS) from coupled noise and ESD. IC Role / Device Role / Timing Role: Point-of-entry protection on PCB-level signal traces before interface ICs. Use Value: Low capacitance (typ. < 100 pF at zero bias) avoids signal integrity degradation on 1 Mbps CAN bus lines. |
| Industrial Motor Drive I/O Protection | Telecom DC Power Input Stage |
Use Scenario: Safeguarding digital I/O and feedback lines in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional-capable layout not applicable; unidirectional placement referenced to local ground plane. Use Value: AEC-Q101 qualification ensures reliability across extended temperature cycles (-65 °C to +185 °C). |
Use Scenario: Front-end surge suppression on -48 V telecom power supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device in series with input filter stage before DC/DC converter. Use Value: 92.6 A IPPM and 32.4 V VC meet GR-1089-CORE Level 3 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Lower PPPM (400 W), same DO-214AC (SMA) package, VBR 22.2–24.5 V, VC = 32.4 V | Not AEC-Q101 qualified; limited to commercial/industrial use | Select when cost sensitivity outweighs automotive qualification and surge energy demands |
| SMCJ20A | Same DO-214AB (SMC) package, PPPM = 1500 W, VBR 22.2–24.5 V, VC = 32.4 V, TJ = 175 °C | Lacks AEC-Q101 certification and 185 °C rating; lower surge endurance | Choose for non-automotive systems requiring SMC footprint but lower energy handling |
Compared with SMAJ20A and SMCJ20A, the 3KASMC20AHM3_A/H delivers 2× higher peak pulse power, full AEC-Q101 compliance, and extended junction temperature capability - making it the only option qualified for under-hood automotive deployment where thermal and surge margins are critical.
Availability
3KASMC20AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom power systems requiring stable component supply, AEC-Q101 assurance, and high-energy transient suppression.
Supply support for 3KASMC20AHM3_A/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure focused on reliability and automotive-grade performance.
The 3KASMC20AHM3_A/H belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for harsh-environment automotive and industrial applications demanding AEC-Q101 qualification and 185 °C operation.
FAQ
What is the clamping voltage of the 3KASMC20AHM3_A/H at its rated peak pulse current?
The 3KASMC20AHM3_A/H has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 92.6 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry during surge events.
Is the 3KASMC20AHM3_A/H qualified for automotive applications?
Yes, the 3KASMC20AHM3_A/H is AEC-Q101 qualified and rated for operation from -65 °C to +185 °C, meeting stringent automotive reliability requirements. It is designed for under-hood and powertrain applications where thermal stability and surge robustness are essential - confirmed in Vishay Document Number 89962.
What package type does the 3KASMC20AHM3_A/H use, and what are its key mechanical features?
The 3KASMC20AHM3_A/H uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. It features UL 94 V-0 molding compound, MSL Level 1 reflow rating (260 °C peak), and cathode identification via color band - dimensions match standard SMC footprints.
How does the 3KASMC20AHM3_A/H differ from standard SMAJ or SMCJ series TVS diodes?
The 3KASMC20AHM3_A/H differs from SMAJ20A and SMCJ20A by offering 3000 W peak pulse power (vs. 400 W and 1500 W), AEC-Q101 qualification, and 185 °C maximum junction temperature (vs. 150 °C and 175 °C). These attributes make it uniquely suited for high-reliability automotive deployments.
What is the reverse leakage current specification for the 3KASMC20AHM3_A/H at its stand-off voltage?
At its 20 V stand-off voltage (VWM), the 3KASMC20AHM3_A/H exhibits a maximum reverse leakage current (IR) of 1.0 µA at TA = 25 °C and 10 µA at TJ = 150 °C. This low leakage preserves system efficiency and prevents false triggering in high-impedance sensing circuits.
3KASMC20AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 83.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
3KASMC20AHM3_A/H FAQ
1.How can I place an order for 3KASMC20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC20AHM3_A/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 3KASMC20AHM3_A/H reliable?
The price and inventory of 3KASMC20AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC20AHM3_A/H?
3KASMC20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC20AHM3_A/H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 3KASMC20AHM3_A/H?
For technical support, including 3KASMC20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC20AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC20AHM3_A/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 3KASMC20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC20AHM3_A/H?
All 3KASMC20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC20AHM3_A/H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 3KASMC20AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC20AHM3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
