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Vishay General Semiconductor - Diodes Division 3KASMC24AHM3_A/H
- Part No.:
- 3KASMC24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24AHM3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
3KASMC24AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 24 V stand-off voltage, 3000 W peak pulse power (10/1000 μs), 38.9 V clamping voltage at 77.1 A surge current, and qualified to AEC-Q101 for automotive-grade reliability.
For engineers reviewing the 3KASMC24AHM3_A/H datasheet, 3KASMC24AHM3_A/H pinout, 3KASMC24AHM3_A/H application, or 3KASMC24AHM3_A/H equivalent, this device serves as a high-energy transient protector for automotive power rails, sensor signal lines, and MOSFET gate drivers where TJ = 185 °C operation and MSL Level 1 solderability are required.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability under high-temperature stress. It delivers uni-directional clamping with 1.0 mA test current, 1.0 μA max reverse leakage at 24 V, and thermal resistance of 18.3 °C/W (junction-to-leads).
Designed for inductive load switching transients and lighting-induced surges, it operates across -65 °C to +185 °C junction temperature range and meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown occurs within this range at 1.0 mA test current |
| VC @ IPPM | 38.9 V - Clamped voltage seen by protected circuit during 77.1 A 10/1000 μs surge |
| PPPM | 3000 W - Peak transient energy absorption capability per single pulse |
| TJ max. | +185 °C - Enables use in under-hood automotive environments without derating |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test standard |
| MSL Level | Level 1 - No floor life limitation; supports reflow up to 260 °C peak |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by band. Dimensions: 7.11 mm × 6.22 mm × 2.90 mm (L × W × H). Matte tin-plated leads, RoHS-compliant, JESD22-B102 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in uni-directional clamp configuration |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 24 V rail or sensor output) to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and low IR drift over temperature and lifetime |
| High-temperature operation | Rated for continuous operation up to TJ = +185 °C - eliminates need for thermal derating in engine-control modules |
| Clamping performance | 38.9 V clamping at 77.1 A enables protection of 3.3 V–24 V logic and power ICs against ISO 7637-2 Pulse 1/2a/5a |
| Solderability & reliability | Meets J-STD-002, JESD22-B102, and JESD201 Class 2 - ensures robust assembly yield and long-term interconnect integrity |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V battery-fed microcontroller power inputs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Uni-directional TVS clamps positive surges to ground while blocking reverse current. Use Value: Withstands 3000 W pulses and operates reliably at TJ = 185 °C - suitable for under-hood ECU designs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in harsh environments. IC Role / Device Role / Timing Role: Fast-response clamping element placed directly at connector entry point. Use Value: 38.9 V clamping and <1.0 μA leakage at 24 V preserve signal integrity and minimize offset error. |
| Industrial Motor Drive Gate Protection | Telecom DC Power Input Stage |
Use Scenario: Shielding IGBT/MOSFET gate drivers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Low-capacitance, fast-turn-on TVS placed between gate and source. Use Value: Sub-nanosecond response and 18.3 °C/W RθJL enable localized heat dissipation without heatsink. |
Use Scenario: Front-end surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection architecture. Use Value: 3000 W rating and AEC-Q101 qualification support high-reliability outdoor infrastructure deployment. |
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 PPPM (400 W), smaller SMA package, lower thermal mass, RθJA = 110 °C/W | Not AEC-Q101 qualified; limited to commercial-temperature industrial use | Select when cost-sensitive, lower-energy transients (<500 W) and non-automotive qualification suffice |
| SMCJ24A | Same DO-214AB package, identical 24 V VWM, but lower TJ max. (150 °C) and no AEC-Q101 certification | Lacks high-temperature validation and automotive reliability testing | Choose only if AEC-Q101 and 185 °C operation are not required; verify thermal margin at TL = 75 °C |
Compared with SMAJ24A and SMCJ24A, the 3KASMC24AHM3_A/H delivers 7.5× higher peak power handling, 35 °C higher junction temperature rating, and formal AEC-Q101 qualification - making it the sole option for demanding automotive power-line protection where sustained thermal stress and regulatory compliance are mandatory.
Availability
3KASMC24AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor control, and telecom DC input protection requiring stable component supply, traceable sourcing, and long-lifecycle availability.
Supply support for 3KASMC24AHM3_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 diodes, rectifiers, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMC series was developed specifically for high-energy transient suppression in automotive and industrial environments where AEC-Q101 compliance, 185 °C operation, and 3000 W pulse capability are critical design requirements.
FAQ
What is the clamping voltage of the 3KASMC24AHM3_A/H under maximum surge conditions?
The 3KASMC24AHM3_A/H exhibits a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 77.1 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during transient events, protecting downstream 24 V-rated ICs and sensors without overstress.
Is the 3KASMC24AHM3_A/H suitable for automotive applications?
Yes, the 3KASMC24AHM3_A/H is AEC-Q101 qualified and rated for TJ = -65 °C to +185 °C, making it fully compliant for under-hood and powertrain applications. Its DO-214AB package meets MSL Level 1, and its construction passes JESD201 Class 2 whisker testing - all verified per Vishay Document Number 89962.
What does the "_A/H" suffix mean in 3KASMC24AHM3_A/H?
The "_A/H" suffix in 3KASMC24AHM3_A/H indicates packaging: "H" denotes 7-inch plastic tape-and-reel delivery with 850 units per reel. The "A" denotes revision level per Vishay's internal change control, and "HM3" confirms RoHS-compliant, AEC-Q101-qualified base construction per ordering table in Document 89962.
How does the thermal performance of the 3KASMC24AHM3_A/H compare to standard SMC TVS diodes?
The 3KASMC24AHM3_A/H features a typical junction-to-leads thermal resistance (RθJL) of 18.3 °C/W - significantly lower than many legacy SMC TVS parts - enabling efficient heat transfer to PCB copper. Its RθJA is 77.5 °C/W on minimum recommended pad layout, supporting reliable operation at full power without external heatsinking.
Can the 3KASMC24AHM3_A/H replace the 3KASMC24A in existing designs?
Yes, the 3KASMC24AHM3_A/H is a direct replacement for the base 3KASMC24A, sharing identical electrical characteristics, DO-214AB package dimensions, pinout, and thermal ratings. The "HM3_A/H" suffix adds RoHS compliance, AEC-Q101 qualification, and tape-and-reel packaging - no layout or schematic changes are needed.
3KASMC24AHM3_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):
- 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)
3KASMC24AHM3_A/H FAQ
1.How can I place an order for 3KASMC24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24AHM3_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 3KASMC24AHM3_A/H reliable?
The price and inventory of 3KASMC24AHM3_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 3KASMC24AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24AHM3_A/H?
3KASMC24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24AHM3_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 3KASMC24AHM3_A/H?
For technical support, including 3KASMC24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC24AHM3_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 3KASMC24AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC24AHM3_A/H?
All 3KASMC24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24AHM3_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 3KASMC24AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC24AHM3_A/H Tags
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