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Vishay General Semiconductor - Diodes Division 3KASMC24AHE3/9AT
- Part No.:
- 3KASMC24AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24AHE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,451
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Product details
Overview
3KASMC24AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 38.9 V under 77.1 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC24AHE3/9AT datasheet, 3KASMC24AHE3/9AT pinout, 3KASMC24AHE3/9AT application, or 3KASMC24AHE3/9AT equivalent, this device is selected for high-reliability DC bus protection where AEC-Q101 qualification, MSL Level 1 moisture resistance, and stable clamping performance across -65 °C to +185 °C are required.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time (<1 ns), ensuring effective suppression of ESD and lightning-induced transients before sensitive downstream components are damaged. Its unidirectional polarity and DO-214AB (SMC) package support high-current transient handling without forward conduction during normal operation.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 1.0 μA max reverse leakage at 24 V standoff, and maintains clamping voltage stability over temperature due to its 185 °C maximum junction rating - critical for under-hood automotive electronics and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy surges common in automotive load-dump and inductive kick scenarios |
| Stand-off Voltage (VWM) | 24 V - sets maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 26.7–29.5 V at 1 mA - defines onset of avalanche conduction with tight tolerance for predictable triggering |
| Clamping Voltage (VC) | 38.9 V at 77.1 A - limits transient voltage seen by protected circuitry during worst-case surge |
| Junction Temperature Range | -65 °C to +185 °C - enables deployment in extreme environments including engine control units and industrial inverters |
| Package | DO-214AB (SMC) - surface-mount outline with 7.11 mm × 6.60 mm footprint and 3.20 mm height for high thermal mass |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability per stress test requirements including HTRB, HTGB, and TCT |
Pinout & Package
Package: DO-214AB (SMC), molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit point during forward conduction; clamping node during reverse surge | Connected to protected line (e.g., 24 V rail); voltage clamped to ≤38.9 V when surge exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (≤1.0 μA at 24 V) and long-term reliability under thermal cycling |
| TJ = 185 °C capability | Supports placement near heat sources (e.g., power MOSFETs) without derating loss in surge capacity |
| 3000 W peak pulse power (10/1000 μs) | Meets ISO 7637-2 Pulse 5a/b requirements for 24 V automotive systems |
| MSL Level 1 (260 °C peak) | Allows standard SMT reflow without preconditioning or dry-pack requirements |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protects microcontroller I/O and gate drivers from load-dump transients during battery disconnect events in 24 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 24 V supply rail and ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits rail voltage to ≤38.9 V during 3000 W surges, preventing latch-up or permanent damage to 3.3 V/5 V logic and MOSFET gate oxides. |
Use Scenario: Shields IGBT gate driver ICs and current sense amplifiers from commutation spikes on 24–48 V DC link buses. IC Role / Device Role / Timing Role: Fast-response surge suppressor mounted directly at power stage input, absorbing energy before it propagates to control circuitry. Use Value: Maintains clamping stability across -40 °C to +125 °C ambient, ensuring consistent protection during extended thermal cycles in factory automation. |
| Telecom Power Supply Input | Consumer Appliance Main Board |
Use Scenario: Guards AC/DC front-end rectifiers and PFC controllers against lightning-induced surges on 24 V telecom backup supplies. IC Role / Device Role / Timing Role: Primary-level transient suppressor located upstream of bulk capacitors and controller ICs. Use Value: Delivers 77.1 A surge current handling with <1 ns response, meeting ITU-T K.20 and IEC 61000-4-5 Level 3 immunity requirements. |
Use Scenario: Safeguards MCU reset lines and communication interfaces (UART, CAN) from ESD and relay coil flyback in smart home appliances. IC Role / Device Role / Timing Role: Localized clamping device adjacent to connectors and inductive loads on 24 V auxiliary rails. Use Value: Provides AEC-Q101-grade reliability in consumer-grade products requiring extended service life and field failure avoidance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower peak pulse power (400 W), smaller SMA package (DO-214AC), 33.2 V clamping at 12.3 A | Suitable for lower-energy signal-line protection; not rated for AEC-Q101 or 185 °C operation | Select when space-constrained PCB layout and cost sensitivity outweigh automotive or high-power requirements |
| SMCJ24A | Same DO-214AB package, 3000 W rating, but 38.9 V clamping at 77.1 A - identical electrical specs; differs only in marking code and packaging suffix | Functionally interchangeable in all circuits; same thermal and surge performance; RoHS-compliant and AEC-Q101 qualified | Choose when sourcing flexibility is needed - SMCJ24A is widely stocked and shares full specification compliance with 3KASMC24AHE3/9AT |
Compared with SMAJ24A and SMCJ24A, the 3KASMC24AHE3/9AT offers identical clamping and surge ratings to SMCJ24A but with enhanced process control for automotive use, while differing fundamentally from SMAJ24A in energy-handling capability and temperature resilience - making it the only option among the three qualified for under-hood deployment.
Availability
3KASMC24AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power supplies, and consumer appliance main boards requiring stable component supply with guaranteed AEC-Q101 compliance and high-temperature reliability.
Supply support for 3KASMC24AHE3/9AT 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 series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment 24 V systems - emphasizing thermal stability, surge robustness, and long-term parametric consistency over extended temperature ranges.
FAQ
What is the clamping voltage of the 3KASMC24AHE3/9AT under maximum surge conditions?
The 3KASMC24AHE3/9AT clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 77.1 A (10/1000 μs waveform). This value is measured at TJ = 25 °C and remains stable across its full operating temperature range due to the device's 185 °C junction rating and optimized passivation process.
Is the 3KASMC24AHE3/9AT suitable for automotive applications?
Yes, the 3KASMC24AHE3/9AT is AEC-Q101 qualified and rated for operation from -65 °C to +185 °C, making it suitable for under-hood automotive applications such as engine control units, body control modules, and ADAS power supplies where high-reliability transient suppression is mandatory.
What package type does the 3KASMC24AHE3/9AT use, and what are its key mechanical features?
The 3KASMC24AHE3/9AT uses the DO-214AB (SMC) surface-mount package, measuring 7.11 mm × 6.60 mm × 3.20 mm. It features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, UL 94 V-0 molding compound, and MSL Level 1 rating for lead-free reflow compatibility without dry-pack requirements.
How does the 3KASMC24AHE3/9AT compare to the SMCJ24A in terms of electrical performance?
The 3KASMC24AHE3/9AT and SMCJ24A share identical key electrical parameters: 24 V stand-off, 26.7–29.5 V breakdown, 38.9 V clamping at 77.1 A, and 3000 W peak pulse power. Both are AEC-Q101 qualified and housed in DO-214AB packages - confirming functional equivalence for surge protection design.
What is the maximum reverse leakage current of the 3KASMC24AHE3/9AT at its stand-off voltage?
At 24 V reverse bias and TA = 25 °C, the 3KASMC24AHE3/9AT exhibits a maximum reverse leakage current of 1.0 μA. This value increases to 50 μA at TJ = 150 °C, reflecting controlled thermal behavior essential for stable operation in high-temperature environments.
3KASMC24AHE3/9AT 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 77.1A
- 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)
3KASMC24AHE3/9AT FAQ
1.How can I place an order for 3KASMC24AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24AHE3/9AT 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 3KASMC24AHE3/9AT reliable?
The price and inventory of 3KASMC24AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC24AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC24AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24AHE3/9AT?
3KASMC24AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24AHE3/9AT 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 3KASMC24AHE3/9AT?
For technical support, including 3KASMC24AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24AHE3/9AT requirements.
6.How does Aetrix verify that 3KASMC24AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC24AHE3/9AT 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 3KASMC24AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC24AHE3/9AT?
All 3KASMC24AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24AHE3/9AT, 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 3KASMC24AHE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC24AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC24AHE3/9AT Tags
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