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Taiwan Semiconductor Corporation 3KSMC15AH
- Part No.:
- 3KSMC15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KSMC15AH.pdf
- Description:
- 3000W, 15V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
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Product details
Overview
3KSMC15AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 15V breakdown voltage (VBR = 14.3–15.8 V), 21.5V maximum clamping voltage (VC) at 140A peak pulse current, and 175°C maximum junction temperature - deployed for surge protection in automotive BLDC motor drives and battery management systems.
For engineers reviewing the 3KSMC15AH datasheet, 3KSMC15AH pinout, 3KSMC15AH application, or 3KSMC15AH equivalent, key selection criteria include unidirectional polarity, IEC 61000-4-2 Level 4/ISO 10605 L4 ESD compliance, ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity, AEC-Q101 qualification, and thermal resistance (RθJL = 17°C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device, activated when reverse voltage exceeds its 14.3 V minimum breakdown threshold (IT = 1 mA). Its 21.5 V clamping voltage at 140 A (10/1000 µs) limits transient energy to protect downstream circuitry without latch-up or degradation under repeated surges.
Thermally, it delivers RθJL = 17°C/W and RθJA = 50°C/W on a 16 mm × 16 mm Cu pad PCB, enabling reliable operation up to 175°C junction temperature while maintaining <3 µA leakage (IR) at 13 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 14.3 / 15.0 / 15.8 V - defines precise conduction onset for accurate overvoltage triggering |
| VC @ IPPM | 21.5 V @ 140 A - ensures downstream ICs see no more than 21.5 V during worst-case 3000 W transients |
| IR @ VWM | 3 µA @ 13 V - ultra-low leakage preserves efficiency in high-impedance sensing or standby circuits |
| PPPM | 3000 W - supports robust immunity against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3b (capacitive coupling) |
| RθJL | 17 °C/W - enables direct thermal path to PCB copper, critical for sustained surge duty in automotive under-hood environments |
| αT | 8.4 × 10−4/°C - allows accurate VBR and VC derating across −55°C to +175°C operating range |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional polarity indicated by cathode band. Weight: 0.210 g. Molding compound: UL 94V-0 rated. Terminals: matte tin-plated, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms return path for clamped surge current |
| Cathode | Protected line input | Connected to power rail or signal line requiring protection; conducts when VKA > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JESD22-A108 |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 compliance | Withstands ±8 kV contact / ±15 kV air discharge ESD without parameter shift or failure |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity | Clamps load-dump (Pulse 1), supply interruption (Pulse 2a), coupled noise (Pulse 3b), and other vehicle-level transients |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained applications |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Suppresses inductive kickback from gate drivers and phase-leg switching in 12–48 V automotive BLDC inverters. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or between gate driver output and MOSFET source. Use Value: Limits voltage overshoot to ≤21.5 V during 140 A transients, preventing MOSFET avalanche failure and gate oxide damage. | Use Scenario: Protects cell monitoring ICs and communication lines (e.g., CAN, UART) from load dump and jump-start surges in 12 V/24 V BMS stacks. IC Role / Device Role / Timing Role: Primary clamping device on main power input and isolated signal rails. Use Value: Maintains system uptime by clamping ISO 7637-2 Pulse 1 (−150 V, 100 ms) to safe levels before protection ICs activate. |
| Automotive Lighting Control | Switching Mode Power Supply (SMPS) |
Use Scenario: Shields LED driver ICs and microcontrollers from relay coil flyback and alternator ripple in headlamp and DRL modules. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12 V input rail upstream of DC/DC converter. Use Value: Absorbs 3000 W pulses without degradation, ensuring >100,000-cycle reliability per AEC-Q101 lifetime testing. | Use Scenario: Safeguards primary-side controllers and secondary-side rectifiers in offline AC/DC adapters and DC/DC converters. IC Role / Device Role / Timing Role: Input-stage transient suppressor on bulk capacitor rail. Use Value: Clamps fast-rising line surges (e.g., lightning-induced) to 21.5 V, preserving MOSFET VDS margin and reducing need for oversized snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Lower PPPM (600 W), same VBR range (14.3–15.8 V), SMB package (smaller footprint, higher RθJA) | Not qualified to AEC-Q101; limited to non-automotive industrial SMPS | Select when cost and board space constrain requirements and automotive qualification is unnecessary |
| 1.5KE15A | Higher VC (24.4 V), axial lead DO-201 package, no AEC-Q101 or ISO 7637-2 validation | Unsuitable for SMT production or automotive vibration environments | Choose only for legacy through-hole designs where rework tolerance and manual assembly are acceptable |
Compared with SMBJ15A and 1.5KE15A, the 3KSMC15AH delivers 5× higher surge power handling, AEC-Q101 validation, and proven ISO 7637-2 immunity - making it the sole choice for automotive-grade SMT surge protection where reliability and regulatory compliance are mandatory.
Availability
3KSMC15AH is available at Aetrix Electronics and suitable for automotive BLDC motor drives, battery management systems, and switching mode power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 3KSMC15AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The 3KSMCxxAH series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment automotive electronics requiring certified immunity to ISO 7637-2, IEC 61000-4-2, and ESD stress.
FAQ
What is the maximum clamping voltage of the 3KSMC15AH at its rated peak pulse current?
The 3KSMC15AH has a maximum clamping voltage (VC) of 21.5 V at 140 A peak pulse current (10/1000 µs waveform), as specified in the Electrical Specifications table. This value ensures protected circuits remain within safe operating limits during high-energy transients. The 3KSMC15AH maintains this clamping performance across its full operating temperature range due to its temperature coefficient (αT = 8.4 × 10−4/°C).
Is the 3KSMC15AH qualified for automotive applications?
Yes, the 3KSMC15AH is AEC-Q101 qualified and validated for automotive use. It meets ISO 7637-2 (Pulse 1/2a/2b/3a/3b), IEC 61000-4-2 Level 4, and ISO 10605 L4 standards. Its DO-214AB package, 175°C junction rating, and JESD201 Class 2 whisker resistance further confirm suitability for under-hood and body-control module deployments.
What is the leakage current specification for the 3KSMC15AH at its working voltage?
The 3KSMC15AH exhibits a maximum reverse leakage current (IR) of 3 µA at 13 V reverse voltage (VWM = 13 V), measured at 25°C. This ultra-low leakage minimizes standby power loss and avoids false triggering in high-impedance monitoring circuits. The 3KSMC15AH maintains this performance across its full −55°C to +175°C storage and operating temperature range.
Does the 3KSMC15AH have polarity markings, and how is it oriented on the PCB?
Yes, the 3KSMC15AH uses a cathode band marking to indicate polarity. As a unidirectional TVS, the cathode must be connected toward the protected line (e.g., 12 V rail), and the anode to ground or low-side reference. The DO-214AB (SMC) package follows standard orientation: cathode band aligns with the end of the molded body nearest the printed marking code "3K15A".
What is the thermal resistance from junction to lead (RθJL) for the 3KSMC15AH, and why does it matter?
The 3KSMC15AH has a junction-to-lead thermal resistance (RθJL) of 17°C/W when mounted on a 16 mm × 16 mm copper pad PCB. This low value enables efficient heat transfer from the silicon die to the PCB copper, critical for sustaining repeated 3000 W transients without thermal runaway. For the 3KSMC15AH, this directly supports AEC-Q101-compliant lifetime reliability in high-temperature automotive environments.
3KSMC15AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V (Max)
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 140A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
3KSMC15AH FAQ
1.How can I place an order for 3KSMC15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KSMC15AH 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 3KSMC15AH reliable?
The price and inventory of 3KSMC15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KSMC15AH is usually 5 days.
3.What payment methods are accepted for 3KSMC15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KSMC15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KSMC15AH?
3KSMC15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KSMC15AH 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 3KSMC15AH?
For technical support, including 3KSMC15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KSMC15AH requirements.
6.How does Aetrix verify that 3KSMC15AH is sourced from the original manufacturer or authorized distributors?
All 3KSMC15AH 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 3KSMC15AH meets industry standards.
7.What is the process for return or replacement of 3KSMC15AH?
All 3KSMC15AH units undergo pre-shipment inspection (PSI). If there is an issue with 3KSMC15AH, 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 3KSMC15AH part is unused and in its original packaging.
Return procedure for 3KSMC15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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