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Vishay General Semiconductor - Diodes Division 3KASMC15HE3/9AT
- Part No.:
- 3KASMC15HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15HE3/9AT.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,188
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Product details
Overview
3KASMC15HE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR), 3000 W peak pulse power (10/1000 μs), 123 A peak pulse current (IPPM), and 185 °C maximum junction temperature - deployed for automotive-grade ESD and surge protection on power rails and signal lines.
For engineers reviewing the 3KASMC15HE3/9AT datasheet, 3KASMC15HE3/9AT pinout, 3KASMC15HE3/9AT application, or 3KASMC15HE3/9AT equivalent, key selection criteria include clamping voltage (24.4 V at IPPM), unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB mounting.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range, with low incremental surge resistance and sub-nanosecond response time to transient events. Its unidirectional architecture provides forward conduction capability while suppressing reverse transients up to 3000 W.
The device is optimized for high-reliability environments: it meets AEC-Q101 stress testing requirements, supports lead-free reflow up to 260 °C (MSL Level 1), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - ensures reliable breakdown onset within tight tolerance band |
| VC @ IPPM | 24.4 V at 123 A - clamping voltage limits downstream IC stress during 10/1000 μs surge |
| PPPM | 3000 W - peak transient energy absorption capacity per standardized waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive and industrial power supply environments |
| RθJA | 77.5 °C/W - thermal resistance defines derating behavior on standard FR-4 PCB without heatsink |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, TCT |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Molded compound meets UL 94 V-0; terminals are matte tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected circuit; enables DC bias path in uni-directional configuration |
| Cathode | Transient clamping node | Marked with band; connected to higher-potential rail; conducts during overvoltage to clamp voltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling and humidity |
| High-temperature capability | TJ max. = 185 °C supports placement near power converters and engine control units without derating penalties |
| Peak pulse power | 3000 W (10/1000 μs) handles ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surges |
| Clamping efficiency | Low VC/VBR ratio (~1.46) minimizes voltage overshoot during fast transients |
| Manufacturing compliance | RoHS-compliant, MSL Level 1, JESD 201 Class 2 whisker tested, LF peak 260 °C reflow compatible |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes above 24.4 V. Use Value: Prevents latch-up or gate oxide damage in MCU power inputs and CAN transceivers during 3000 W surge events. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) from ESD and switching noise in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt transients before reaching op-amp input stage. Use Value: Maintains signal integrity with <1 nF junction capacitance and preserves accuracy under ±8 kV contact ESD (IEC 61000-4-2). |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Clamping |
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC bus upstream of DC-DC converter. Use Value: Withstands repetitive 10/1000 μs surges up to 123 A while maintaining 24.4 V clamping ceiling for downstream regulation. |
Use Scenario: Adding robust overvoltage protection to USB-C PD adapter outputs where fault currents may exceed 100 A. IC Role / Device Role / Timing Role: Final-stage clamping device after synchronous rectifier, before output capacitor. Use Value: Limits transient overshoot to safe levels (<25 V) for connected devices, leveraging 185 °C TJ rating for compact thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 16.7–18.5 V; RθJA = 110 °C/W | Limited to low-energy consumer applications; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive or high-power surge requirements |
| 1.5KE15A | Through-hole DO-201AE package; same VWM/VBR; PPPM = 1500 W; higher VF (3.5 V); no MSL rating | Suitable only for non-reflow production; lacks automotive qualification and surface-mount compatibility | Choose only for legacy through-hole designs where board space and reflow process are not constraints |
Compared with SMAJ15A and 1.5KE15A, the 3KASMC15HE3/9AT delivers 7.5× higher peak power handling, AEC-Q101 validation, and superior thermal performance in SMT assembly - making it the sole option for modern automotive and industrial designs requiring sustained 185 °C operation and 3000 W surge immunity.
Availability
3KASMC15HE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC inputs, and consumer power adapter outputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 3KASMC15HE3/9AT 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMC15HE3/9AT belongs to Vishay's PAR® (Protection Against Transients) family - engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC15HE3/9AT under peak surge conditions?
The 3KASMC15HE3/9AT exhibits a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 123 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream components such as MCUs, transceivers, and power regulators in the protected circuit.
Is the 3KASMC15HE3/9AT qualified for automotive applications?
Yes, the 3KASMC15HE3/9AT is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). Its 185 °C maximum junction temperature and MSL Level 1 rating further validate its suitability for under-hood and powertrain control modules where thermal and reliability demands are most stringent.
What package type does the 3KASMC15HE3/9AT use, and what are its key mechanical features?
The 3KASMC15HE3/9AT uses the DO-214AB (SMC) surface-mount package, with overall dimensions of 7.11 mm × 6.22 mm × 2.90 mm. It features a cathode band marking, UL 94 V-0 compliant molding compound, matte tin-plated leads, and is rated for lead-free reflow up to 260 °C. The recommended minimum pad layout is specified in the Vishay datasheet (Document Number: 89962).
How does the thermal performance of the 3KASMC15HE3/9AT compare to standard SMA packages?
The 3KASMC15HE3/9AT offers significantly better thermal performance than SMA-packaged alternatives: its typical junction-to-ambient thermal resistance (RθJA) is 77.5 °C/W versus ~110 °C/W for SMAJ-series devices. This 30 % improvement allows higher sustained power dissipation on standard PCBs and reduces risk of thermal runaway during repetitive surge events.
Can the 3KASMC15HE3/9AT be used in bidirectional configurations?
No, the 3KASMC15HE3/9AT is strictly unidirectional, as confirmed in the Vishay datasheet. It conducts forward current like a standard diode but clamps only reverse transients. For bidirectional protection, a separate device such as the SMBJ15CA or a back-to-back pair would be required - the 3KASMC15HE3/9AT itself does not provide symmetrical clamping behavior.
3KASMC15HE3/9AT 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
3KASMC15HE3/9AT FAQ
1.How can I place an order for 3KASMC15HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15HE3/9AT 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 3KASMC15HE3/9AT reliable?
The price and inventory of 3KASMC15HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15HE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC15HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15HE3/9AT?
3KASMC15HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15HE3/9AT 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 3KASMC15HE3/9AT?
For technical support, including 3KASMC15HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15HE3/9AT requirements.
6.How does Aetrix verify that 3KASMC15HE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC15HE3/9AT 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 3KASMC15HE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC15HE3/9AT?
All 3KASMC15HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15HE3/9AT, 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 3KASMC15HE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC15HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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