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Vishay General Semiconductor - Diodes Division 3KASMC24HE3_A/I
- Part No.:
- 3KASMC24HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24HE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,337
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Product details
Overview
3KASMC24HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 24 V stand-off voltage, 26.7–29.5 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 µs), 77.1 A peak surge current, and 38.9 V clamping voltage - deployed for automotive power line and sensor interface protection.
For engineers reviewing the 3KASMC24HE3_A/I datasheet, 3KASMC24HE3_A/I pinout, 3KASMC24HE3_A/I application, or 3KASMC24HE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature limit (TJ = 185 °C), and DO-214AB mechanical layout details critical for high-reliability PCB design.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive transients while maintaining low incremental surge resistance and fast response time (<1 ns). Its unidirectional polarity and 24 V VWM make it suitable for DC power rail protection where reverse conduction must be blocked.
Rated for TJ = 185 °C operation and qualified to AEC-Q101, the 3KASMC24HE3_A/I supports automotive under-hood applications with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 24 V systems. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - ensures reliable turn-on within defined tolerance for predictable overvoltage thresholding. |
| PPPM | 3000 W (10/1000 µs) - sustains high-energy transients such as ISO 7637-2 Pulse 5a without failure. |
| IPPM | 77.1 A - peak surge current capability directly determines survivability against load-dump events. |
| VC | 38.9 V at IPPM - clamping voltage limits downstream IC stress; <1.7×VWM indicates efficient suppression ratio. |
| TJ max. | +185 °C - enables placement near hot components (e.g., power converters, engine control units) without derating. |
| RθJA | 77.5 °C/W - thermal resistance informs board-level heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; conducts during reverse-transient clamping. |
| Cathode | Reverse-biased terminal | Connected to protected line (e.g., 24 V rail); initiates avalanche breakdown when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 185 °C junction rating | Enables deployment in high-temperature zones (e.g., engine compartments, power inverters) without thermal derating penalties. |
| 3000 W peak pulse power | Withstands severe ISO 7637-2 load dump and inductive switching surges common in 24 V vehicle architectures. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage exposure to downstream MOSFETs, MCUs, and CAN transceivers during transient events. |
| MSL Level 1 (260 °C peak) | Allows standard SMT reflow without pre-baking; compatible with automated assembly lines using lead-free processes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and point-of-load regulator input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 40 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in harsh industrial environments. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to absorb ESD and inductive kickback without distorting millivolt-level signals. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 while adding <10 pF parasitic capacitance at zero bias. |
| Telecom DC Power Input | Motor Drive Gate Driver Protection |
Use Scenario: Securing -48 V telecom power feeds against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 3KASMC24HE3_A/I used with polarity-aware front-end design. Use Value: Delivers 3000 W surge handling with 77.1 A peak current capacity, meeting GR-1089-CORE Level 3 requirements. |
Use Scenario: Shielding high-side gate drivers in 24 V BLDC motor inverters from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Fast-response TVS placed across gate-source terminals of N-channel MOSFETs. Use Value: Sub-1 ns response time prevents gate oxide rupture; 38.9 V clamping protects drivers rated for 40 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), smaller SMA package (DO-214AC), RθJA = 110 °C/W, same VWM/VBR range. | Not AEC-Q101 qualified; limited to commercial/industrial use; insufficient for automotive load dump. | Select only for cost-sensitive, non-automotive 24 V systems with lower surge energy requirements. |
| SMCJ24A | Same DO-214AB package and 3000 W rating, but VBR min = 26.7 V (identical), VC = 38.9 V (identical), AEC-Q101 qualified. | Functionally identical clamping performance and qualification; differs only in base P/N suffix and tape/reel packaging code. | Direct functional alternative with identical electrical and thermal specs; verify reel code compatibility with SMT line feeders. |
Compared with SMAJ24A and SMCJ24A, the 3KASMC24HE3_A/I offers identical surge robustness and AEC-Q101 compliance but is distinguished by its HM3_A/I tape-and-reel configuration (3500 pcs per 13″ reel), optimized for high-volume automotive manufacturing traceability and handling.
Availability
3KASMC24HE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supplies requiring stable component supply with full AEC-Q101 traceability and RoHS-compliant sourcing.
Supply support for 3KASMC24HE3_A/I 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive qualification.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for high-energy transient suppression in demanding automotive and industrial environments where junction temperature stability up to 185 °C is mandatory.
FAQ
What is the clamping voltage of the 3KASMC24HE3_A/I at its rated peak pulse current?
The 3KASMC24HE3_A/I has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 77.1 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during surge events. The 3KASMC24HE3_A/I maintains this clamping performance across its qualified temperature range up to +185 °C junction temperature.
Is the 3KASMC24HE3_A/I AEC-Q101 qualified and what tests does that include?
Yes, the 3KASMC24HE3_A/I is AEC-Q101 qualified, confirming compliance with stress test requirements for discrete semiconductors in automotive applications. Qualification includes HTGB (high-temperature gate bias), HTRB (high-temperature reverse bias), TCT (temperature cycling), and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV). The 3KASMC24HE3_A/I achieves this while sustaining 185 °C maximum junction temperature - exceeding standard AEC-Q101 thermal limits.
What is the package type and mounting specification for the 3KASMC24HE3_A/I?
The 3KASMC24HE3_A/I uses the DO-214AB (SMC) surface-mount package, with cathode identified by a color band. It features matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 wetting balance testing. The recommended mounting pad layout is specified in the Vishay datasheet (Document Number 89962), and the device meets MSL Level 1 per J-STD-020 with a 260 °C peak reflow profile.
How does the 3KASMC24HE3_A/I compare to standard SMAJ or SMCJ series TVS diodes?
The 3KASMC24HE3_A/I matches the electrical performance of SMCJ24A (same VWM, VBR, VC, PPPM, and AEC-Q101 status) but differs in packaging suffix (HM3_A/I denotes 13″ tape-and-reel, 3500 pcs). Unlike SMAJ24A, the 3KASMC24HE3_A/I delivers 3000 W surge capability and 185 °C operation - making it unsuitable for direct substitution with SMAJ24A in automotive designs requiring load dump immunity.
What is the maximum junction temperature and thermal resistance of the 3KASMC24HE3_A/I?
The 3KASMC24HE3_A/I has a maximum junction temperature (TJ) of +185 °C and a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout. This RθJA value assumes no external heatsink and defines the allowable power dissipation envelope for ambient temperature derating - critical for under-hood automotive placement where ambient may exceed 125 °C.
3KASMC24HE3_A/I 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:
- 43V
- Current - Peak Pulse (10/1000µs):
- 69.8A
- 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)
3KASMC24HE3_A/I FAQ
1.How can I place an order for 3KASMC24HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24HE3_A/I 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 3KASMC24HE3_A/I reliable?
The price and inventory of 3KASMC24HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC24HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC24HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24HE3_A/I?
3KASMC24HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24HE3_A/I 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 3KASMC24HE3_A/I?
For technical support, including 3KASMC24HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC24HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC24HE3_A/I 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 3KASMC24HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC24HE3_A/I?
All 3KASMC24HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24HE3_A/I, 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 3KASMC24HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC24HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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