My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC20AHE3_A/H
- Part No.:
- 3KASMC20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC20AHE3_A/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,740
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC20AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 32.4 V under 92.6 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients in engine control units and motor drives.
For engineers reviewing the 3KASMC20AHE3_A/H datasheet, 3KASMC20AHE3_A/H pinout, 3KASMC20AHE3_A/H application, or 3KASMC20AHE3_A/H equivalent, key selection criteria include its DO-214AB (SMC) package, 20 V stand-off voltage, AEC-Q101 qualification, 1.0 mA breakdown test current, and 1.0 μA reverse leakage at VWM.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable clamping performance across temperature. Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and minimal voltage overshoot during 8.3 ms half-sine or 10/1000 μs surge events.
Rated for TJ = –65 °C to +185 °C and qualified to AEC-Q101, the 3KASMC20AHE3_A/H supports high-reliability automotive applications where thermal cycling and long-term stability under sustained bias are critical - including 12 V and 24 V boardnet protection in ADAS modules and body control units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range on protected 12 V/24 V supply lines. |
| VBR (min/max) | 22.2 V / 24.5 V at 1.0 mA - verified breakdown threshold ensures predictable turn-on margin above VWM for reliable overvoltage detection. |
| VC @ IPPM | 32.4 V at 92.6 A - clamping voltage under full 3000 W surge; limits stress on downstream MOSFET gate oxide or IC input structures. |
| PPPM | 3000 W - peak pulse power handling per 10/1000 μs waveform; enables suppression of high-energy transients from relay coils or solenoid drivers. |
| TJ max. | +185 °C - extended junction temperature rating allows operation in under-hood environments without derating penalties. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including HTGB, HTRB, and temperature cycling per JEDEC standards. |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case meeting UL 94 V-0; cathode indicated by color band; terminals are matte tin plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path; forms reference for unidirectional clamping to positive rail. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., battery feed); conducts surge current to ground when VPROTECTED exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable VBR and low leakage (<1.0 μA at VWM) across –65 °C to +150 °C operating range. |
| 3000 W peak pulse power (10/1000 μs) | Withstands repeated load-dump surges per ISO 7637-2 Pulse 5a without degradation. |
| TJ = 185 °C capability | Enables placement near heat sources (e.g., power inductors, MOSFETs) without thermal derating in engine bay designs. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required pre-assembly. |
| Uni-directional polarity only | Simplifies layout for DC-biased rails; eliminates need for series blocking diodes in single-polarity protection schemes. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
|
Use Scenario: Protection of 12 V supply inputs against load dump and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO/regulator input to clamp transients before they reach sensitive microcontrollers. Use Value: Clamps to 32.4 V at 92.6 A, limiting stress on 36 V-rated input capacitors and ensuring regulator survival during ISO 7637-2 Pulse 5a events. |
Use Scenario: Surge suppression on DC bus lines feeding IGBT gate drivers in HVAC and pump inverters. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing commutation spikes from inductive motor windings during PWM switching. Use Value: 3000 W pulse rating and 185 °C junction rating allow continuous operation in sealed enclosures with ambient temperatures up to 105 °C. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Input |
|
Use Scenario: Protecting LIN bus transceivers and LED driver ICs from ESD and cable discharge events in door modules. IC Role / Device Role / Timing Role: Localized TVS on each protected line, leveraging low capacitance and fast response to preserve signal integrity. Use Value: Sub-1 ns response time and 1.0 μA leakage at 20 V prevent false triggering while maintaining low standby current in always-on circuits. |
Use Scenario: Secondary-side overvoltage protection on 24 V telecom rectifier outputs feeding base station controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS acting as last-line defense against backfeed surges from hot-swap connectors or failed upstream converters. Use Value: AEC-Q101 qualification ensures long-term reliability under telecom-grade burn-in and life testing protocols (e.g., Telcordia GR-1089). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower PPPM (600 W), same DO-214AA (SMB) package, VC = 32.4 V @ 18.5 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a compliance | Select 3KASMC20AHE3_A/H when >2000 W surge immunity is required in space-constrained SMC layouts. |
| SMCJ20A | Same DO-214AB (SMC) package and 3000 W rating, but VBR = 22.2–24.5 V and VC = 32.4 V - identical clamping, non-AEC-Q101 rated | Lacks automotive qualification; not validated for HTGB or temperature cycling per AEC-Q101 | Choose 3KASMC20AHE3_A/H for production automotive programs requiring documented AEC-Q101 evidence and traceable lot data. |
Compared with SMBJ20A and SMCJ20A, the 3KASMC20AHE3_A/H uniquely combines 3000 W surge capability, AEC-Q101 qualification, and DO-214AB packaging - making it the only option among the three qualified for safety-critical automotive power rail protection without redesign or qualification overhead.
Availability
3KASMC20AHE3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, and telecom power supplies requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for 3KASMC20AHE3_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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive power systems - emphasizing thermal robustness, surge consistency, and process-controlled parametric stability.
FAQ
What is the clamping voltage of the 3KASMC20AHE3_A/H under maximum surge conditions?
The 3KASMC20AHE3_A/H clamps to 32.4 V when subjected to its rated peak pulse current of 92.6 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 05-Mar-13, ensuring predictable overvoltage limiting for downstream components in 12 V and 24 V systems.
Is the 3KASMC20AHE3_A/H qualified for automotive use?
Yes, the 3KASMC20AHE3_A/H is fully AEC-Q101 qualified, with test evidence covering high-temperature reverse bias (HTGB), high-temperature operating life (HTOL), and temperature cycling. This qualification is explicitly stated in the Vishay document 89962 and applies to the HM3 suffix variant, which includes the 3KASMC20AHE3_A/H ordering code.
What package type does the 3KASMC20AHE3_A/H use, and what are its key mechanical features?
The 3KASMC20AHE3_A/H uses the DO-214AB (SMC) package: a surface-mount outline measuring 7.75 mm × 6.22 mm with matte tin-plated leads. It meets UL 94 V-0 flammability, MSL Level 1 (260 °C peak reflow), and JESD 201 Class 2 whisker resistance - all confirmed in the official Vishay datasheet.
Does the 3KASMC20AHE3_A/H have bidirectional polarity?
No, the 3KASMC20AHE3_A/H is unidirectional only, with polarity indicated by a cathode band. Its electrical characteristics - including VBR, VWM, and clamping behavior - are specified exclusively for reverse-biased operation. Bidirectional variants are not offered in the 3KASMCxxA series.
What is the maximum junction temperature rating for the 3KASMC20AHE3_A/H?
The 3KASMC20AHE3_A/H has a maximum junction temperature rating of +185 °C, verified per the Vishay datasheet. This enables operation in high-ambient environments such as engine compartments or sealed industrial enclosures without thermal derating, provided PCB layout follows the recommended pad dimensions.
3KASMC20AHE3_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:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 92.6A
- 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)
3KASMC20AHE3_A/H FAQ
1.How can I place an order for 3KASMC20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC20AHE3_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 3KASMC20AHE3_A/H reliable?
The price and inventory of 3KASMC20AHE3_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 3KASMC20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC20AHE3_A/H?
3KASMC20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC20AHE3_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 3KASMC20AHE3_A/H?
For technical support, including 3KASMC20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC20AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC20AHE3_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 3KASMC20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC20AHE3_A/H?
All 3KASMC20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC20AHE3_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 3KASMC20AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC20AHE3_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 …
