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Taiwan Semiconductor Corporation 3KSMC47AH
- Part No.:
- 3KSMC47AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KSMC47AH.pdf
- Description:
- 3000W, 46.7V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,747
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Product details
Overview
3KSMC47AH from Taiwan Semiconductor is a unidirectional 47V standoff, 64.5V clamping, 3000W peak pulse power transient voltage suppressor (TVS) in DO-214AB (SMC) package, rated for 175°C junction temperature and designed for automotive-grade surge protection in battery management systems and BLDC motor drives.
For engineers reviewing the 3KSMC47AH datasheet, 3KSMC47AH pinout, 3KSMC47AH application, or 3KSMC47AH equivalent, key selection criteria include clamping voltage at 10/1000µs waveform, unidirectional polarity, AEC-Q101 qualification, IEC 61000-4-2 Level 4 compliance, and thermal resistance (RθJL = 17°C/W).
Technical Context
The 3KSMC47AH operates as a unidirectional avalanche diode with precise breakdown voltage (VBR = 44.4–49.0 V at IT = 1 mA) and low dynamic resistance (RD = 0.409 Ω), enabling fast response to ESD and load-dump transients. Its 3000W peak pulse power rating (10/1000 µs) supports robust protection in harsh automotive environments.
Thermal performance is defined by RθJL = 17°C/W and RθJA = 50°C/W on a 16 mm × 16 mm copper pad, allowing reliable operation up to TJ = 175°C. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b and ISO 10605 L4 standards without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse working voltage before leakage exceeds 3 µA |
| VBR @ IT=1mA | 44.4–49.0 V - Breakdown voltage range ensuring predictable turn-on during overvoltage events |
| VC @ IPPM=43.5A | 64.5 V - Clamping voltage limiting downstream component stress under 3000W 10/1000µs surge |
| PPPM | 3000 W - Peak pulse power handling capability per IEC 61000-4-2 and ISO 10605 test conditions |
| RD | 0.409 Ω - Low dynamic resistance minimizing voltage overshoot during fast transients |
| TJ max | 175 °C - Maximum junction temperature supporting under-hood automotive deployment |
| αT | 10.1 × 10−4/°C - Temperature coefficient enabling accurate VBR and VC derating across operating range |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional device with cathode band marking. Weight: 0.210 g. Matte tin-plated leads, J-STD-002 solderable, JESD 201 Class 2 whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., battery rail); cathode band identifies polarity on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 compliance | Withstands ±15 kV air discharge and ±8 kV contact discharge without degradation |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity | Protects against load dump, inductive switching, and supply line transients in 12V/24V vehicle networks |
| UL 94V-0 molding compound | Self-extinguishing encapsulation meeting flammability safety requirements for enclosed modules |
Applications
| Battery Management System (BMS) | BLDC Motor Drive |
|---|---|
Use Scenario: Protection of high-voltage battery pack monitoring ICs and cell balancing circuits against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and protection IC input to clamp transients below 64.5 V. Use Value: Prevents latch-up or permanent damage to analog front-end components during ISO 7637-2 Pulse 5a events. | Use Scenario: Surge suppression on gate driver supply rails and phase current sense lines in automotive HVAC or power steering motors. IC Role / Device Role / Timing Role: Fast-clamping TVS absorbing inductive kickback from MOSFET switching and ESD from connector mating. Use Value: Maintains signal integrity on current-sense amplifiers with <0.41 Ω dynamic resistance limiting overshoot. |
| Automotive Lighting Module | Switching Mode Power Supply (SMPS) |
Use Scenario: Input rail protection in LED headlamp drivers exposed to alternator ripple and ignition noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 47V-rated input stage, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Enables compliance with CISPR 25 Class 5 radiated emissions by reducing transient energy coupled into power stage. | Use Scenario: Secondary-side output surge protection in 48V telecom or industrial SMPS where output must survive accidental short-circuit recovery spikes. IC Role / Device Role / Timing Role: Unidirectional TVS on regulated output rail, triggered only during reverse-polarity or overvoltage fault conditions. Use Value: Limits clamping voltage to 64.5 V while sustaining 3000W peak power, preventing secondary-side controller reset or MOSFET avalanche failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | Lower PPPM (600W), same VBR range (44.7–49.4 V), SMB package (smaller thermal mass) | Not AEC-Q101 qualified; limited to non-automotive industrial use | Select when cost sensitivity outweighs automotive qualification and surge energy is ≤600W |
| SMCJ47A | Same DO-214AB package and 3000W rating, but VBR min = 44.7 V, VC = 64.8 V, no AEC-Q101 certification | Lacks automotive qualification and ISO 7637-2 Pulse 5a validation | Acceptable for industrial BMS or lighting where AEC-Q101 is not mandated |
Compared with SMBJ47A and SMCJ47A, the 3KSMC47AH delivers certified automotive reliability, tighter VC tolerance (64.5 V vs. 64.8 V), and guaranteed ISO 7637-2 Pulse 1–3b immunity-critical for functional safety–aligned designs.
Availability
3KSMC47AH is available at Aetrix Electronics and suitable for battery management systems, BLDC motor drives, automotive lighting modules, and switching mode power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KSMC47AH 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, specializing in TVS diodes, rectifiers, and power devices since 1994.
The 3KSMC series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting high-energy load-dump and ESD protection in 12V/24V/48V vehicle architectures.
FAQ
What is the maximum clamping voltage of the 3KSMC47AH under a 10/1000µs surge?
The 3KSMC47AH has a maximum clamping voltage (VC) of 64.5 V at IPPM = 43.5 A for a 10/1000 µs waveform. This value is measured per IEC 61000-4-2 and ISO 10605 test conditions and ensures downstream components remain within safe voltage limits during standardized surge events. The 3KSMC47AH maintains this clamping performance across its full operating temperature range using its specified αT coefficient.
Is the 3KSMC47AH suitable for bidirectional transient protection?
No, the 3KSMC47AH is a unidirectional TVS diode, indicated by its single cathode band and specified electrical characteristics (e.g., VWM = 40 V, VBR = 44.4–49.0 V). It conducts only during reverse-biased overvoltage events. For bidirectional protection, a symmetric device such as the 3KSMC47CA would be required. The 3KSMC47AH must be oriented with cathode toward the protected line.
Does the 3KSMC47AH meet automotive qualification standards?
Yes, the 3KSMC47AH 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 (±15 kV air, ±8 kV contact), and ISO 10605 L4 requirements. These certifications are documented in Taiwan Semiconductor's official qualification reports for the 3KSMC12AH–47AH family, Version B2012.
What is the thermal resistance from junction to lead (RθJL) for the 3KSMC47AH?
The junction-to-lead thermal resistance (RθJL) of the 3KSMC47AH is 17°C/W, measured on a standard 16 mm × 16 mm copper pad PCB per JEDEC test conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper, supporting sustained power dissipation and reliability in high-temperature under-hood environments where the 3KSMC47AH operates up to 175°C junction temperature.
How is polarity identified on the 3KSMC47AH package?
Polarity on the 3KSMC47AH is indicated by a visible cathode band on the DO-214AB (SMC) package body. The banded end corresponds to the cathode terminal, which must be connected to the line being protected (e.g., battery positive or signal rail), while the unbanded end is the anode, typically tied to ground or return path. This marking complies with industry-standard diode polarity conventions and is verified in the manufacturer's package outline drawings.
3KSMC47AH 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):
- 40V (Max)
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
3KSMC47AH FAQ
1.How can I place an order for 3KSMC47AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KSMC47AH 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 3KSMC47AH reliable?
The price and inventory of 3KSMC47AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KSMC47AH is usually 5 days.
3.What payment methods are accepted for 3KSMC47AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KSMC47AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KSMC47AH?
3KSMC47AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KSMC47AH 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 3KSMC47AH?
For technical support, including 3KSMC47AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KSMC47AH requirements.
6.How does Aetrix verify that 3KSMC47AH is sourced from the original manufacturer or authorized distributors?
All 3KSMC47AH 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 3KSMC47AH meets industry standards.
7.What is the process for return or replacement of 3KSMC47AH?
All 3KSMC47AH units undergo pre-shipment inspection (PSI). If there is an issue with 3KSMC47AH, 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 3KSMC47AH part is unused and in its original packaging.
Return procedure for 3KSMC47AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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