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Vishay General Semiconductor - Diodes Division 3KASMC24HE3_A/H
- Part No.:
- 3KASMC24HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24HE3_A/H.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,384
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Product details
Overview
3KASMC24HE3_A/H 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 clamping to 38.9 V at IPPM - deployed for automotive power rail and sensor line protection.
For engineers reviewing the 3KASMC24HE3_A/H datasheet, 3KASMC24HE3_A/H pinout, 3KASMC24HE3_A/H application, or 3KASMC24HE3_A/H equivalent, this page delivers verified electrical specs, thermal resistance (RθJA = 77.5 °C/W), AEC-Q101 qualification status, uni-directional polarity confirmation, and DO-214AB mechanical dimensions - all critical for ESD/surge design validation in high-reliability embedded systems.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability up to TJ = 185 °C, enabling operation in under-hood automotive environments. Its low incremental surge resistance and fast response time ensure effective clamping of inductive switching transients before downstream ICs or MOSFETs are damaged.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and is qualified to AEC-Q101. It exhibits 1.0 µA maximum reverse leakage at VWM = 24 V and 1.0 µA at TJ = 150 °C, confirming stable blocking behavior across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range on protected line. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 µs) - Sustains high-energy surges common in automotive load-dump or ISO 7637-2 Pulse 5a without failure. |
| IPPM | 77.1 A - Peak surge current capability directly correlates with clamping performance at VC = 38.9 V. |
| VC | 38.9 V at IPPM - Clamping voltage limits stress on downstream components; margin vs. VWM is 62%. |
| TJ max. | +185 °C - Enables use in high-temperature zones such as engine control units without derating concerns. |
| RθJA | 77.5 °C/W - Thermal resistance informs board-level heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected circuit | Provides low VF (3.5 V @ 100 A) path during surge conduction; must be routed with low-inductance trace. |
| Cathode | Current exit point in forward bias; marked by color band; connected to higher-potential side (e.g., VBAT) | Defines uni-directional clamping direction; reverse connection would disable protection function. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage and breakdown characteristics over lifetime and temperature. |
| AEC-Q101 qualification | Validated reliability for automotive applications including temperature cycling, humidity, and mechanical shock testing. |
| MSL Level 1 rating | Supports standard lead-free reflow (260 °C peak) without preconditioning or dry-pack requirements. |
| Low clamping ratio (VC/VBR) | 1.35 - Tight ratio minimizes overvoltage exposure to protected ICs while maintaining robust surge handling. |
| High TJ capability | 185 °C junction rating allows direct placement near heat sources (e.g., power converters) without thermal derating. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in body control modules against ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Uni-directional TVS clamps negative-going spikes and positive load-dump surges on battery-fed rails. Use Value: Limits voltage to ≤38.9 V during 77.1 A surges, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Fast-response TVS absorbs ESD and inductive kickback from solenoid drivers coupled onto signal lines. Use Value: Sub-1 ns response time and 1.0 µA leakage at 24 V preserve signal integrity and measurement accuracy in 16-bit ADC front-ends. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding 24 V DC input of PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs lightning-induced surges on outdoor-facing power feeds. Use Value: 3000 W peak power rating handles 10/1000 µs surges per IEC 61000-4-5 Level 4 without degradation. |
Use Scenario: Suppressing back-EMF from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Uni-directional clamp diverts inductive energy away from H-bridge MOSFETs during commutation. Use Value: 200 A IFSM rating withstands repeated motor stall currents; DO-214AB footprint supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A (Bourns) | Same DO-214AA (SMB) package; 24 V VWM, 3000 W PPPM, but lower IPPM (69.4 A) and higher VC (38.9 V same, but VBR min 26.7 V identical) | Smaller package (SMB vs SMC) reduces board area but lowers thermal mass; less suitable for sustained surge duty cycles. | Select SMBJ24A only if space-constrained and thermal derating is acceptable; verify layout clearance for reduced creepage. |
| 1.5KE24A (ON Semiconductor) | Through-hole DO-201 package; same VWM/VBR specs, 3000 W rating, but higher VC (43 V) and no AEC-Q101 qualification. | Not automotive-qualified; unsuitable for production vehicles; limited to industrial or consumer prototyping where reflow isn't required. | Choose 1.5KE24A only for cost-sensitive non-automotive designs where through-hole assembly is preferred and AEC-Q101 is not mandated. |
Compared with SMBJ24A and 1.5KE24A, the 3KASMC24HE3_A/H delivers superior thermal robustness (RθJL = 18.3 °C/W), AEC-Q101 compliance, and SMC package reliability for automated SMT lines - making it the preferred choice for volume automotive and industrial production.
Availability
3KASMC24HE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC24HE3_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, TVS devices, and optoelectronics with emphasis on reliability, high-temperature operation, and automotive-grade qualification.
The 3KASMC series was designed specifically for high-energy transient suppression in harsh-environment applications - targeting AEC-Q101 compliance, 185 °C junction operation, and robust 3000 W surge handling in compact SMC packages.
FAQ
What is the exact breakdown voltage range for 3KASMC24HE3_A/H?
The 3KASMC24HE3_A/H has a guaranteed breakdown voltage range of 26.7 V to 29.5 V at test current IT = 1 mA, per Vishay Document Number 89962, page 2. This VBR window ensures consistent clamping onset across production lots and temperature extremes, critical for predictable overvoltage protection in safety-critical systems.
Is 3KASMC24HE3_A/H qualified to AEC-Q101?
Yes, the 3KASMC24HE3_A/H is explicitly AEC-Q101 qualified, as confirmed in the "MECHANICAL DATA" section and footnote (1) of Vishay Document Number 89962. This qualification covers stress tests including temperature cycling, high-temperature operating life, and ESD, validating its suitability for automotive powertrain and chassis applications.
What does the '_A/H' suffix mean in 3KASMC24HE3_A/H?
The '_A/H' suffix in 3KASMC24HE3_A/H indicates packaging: 'H' denotes 7-inch plastic tape-and-reel delivery with 850 units per reel, per Vishay's ordering information table (page 2). The 'A' denotes revision level, and 'E3' refers to Vishay's standard lead (Pb)-free plating specification compliant with JEDEC JS709A.
What is the clamping voltage of 3KASMC24HE3_A/H at peak surge current?
The 3KASMC24HE3_A/H clamps to a maximum of 38.9 V at its rated peak pulse current IPPM = 77.1 A (10/1000 µs waveform), as specified in the Electrical Characteristics table on page 2 of Vishay Document Number 89962. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can 3KASMC24HE3_A/H replace older SMAJ24A devices?
No - the 3KASMC24HE3_A/H is not a drop-in replacement for SMAJ24A due to different packages: SMAJ24A uses DO-214AC (SMA), while 3KASMC24HE3_A/H uses larger DO-214AB (SMC). Pad layout, thermal relief, and mechanical clearance must be redesigned; however, its higher surge rating and AEC-Q101 qualification make it a functional upgrade where board space permits.
3KASMC24HE3_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:
- 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/H FAQ
1.How can I place an order for 3KASMC24HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24HE3_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 3KASMC24HE3_A/H reliable?
The price and inventory of 3KASMC24HE3_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 3KASMC24HE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC24HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24HE3_A/H?
3KASMC24HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24HE3_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 3KASMC24HE3_A/H?
For technical support, including 3KASMC24HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24HE3_A/H requirements.
6.How does Aetrix verify that 3KASMC24HE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC24HE3_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 3KASMC24HE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC24HE3_A/H?
All 3KASMC24HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24HE3_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 3KASMC24HE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC24HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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