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Taiwan Semiconductor Corporation 3KSMC30AH
- Part No.:
- 3KSMC30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KSMC30AH.pdf
- Description:
- 3000W, 30.4V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,215
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Product details
Overview
3KSMC30AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 30.4V typical breakdown voltage (VBR), 42.1V maximum clamping voltage (VC) at 71.3A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability. It protects BLDC motor drives, battery management systems, and automotive power electronics against ISO 7637-2 pulses and IEC 61000-4-2 ESD events.
For engineers reviewing the 3KSMC30AH datasheet, 3KSMC30AH pinout, 3KSMC30AH application, or 3KSMC30AH equivalent, key selection criteria include its 30.4V VBR, 42.1V VC at 10/1000µs, 3000W PPPM rating, unidirectional polarity, and DO-214AB thermal performance (RθJA = 50°C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds 28.9–31.9V (min–max VBR at 1mA). Its low dynamic resistance (0.164Ω) ensures stable clamping under fast transients, while the 9.7×10−4/°C temperature coefficient (αT) enables predictable VBR and VC drift across −55°C to +175°C junction range.
Designed for high-energy surge suppression, it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b and IEC 61000-4-2 Level 4 (±15kV air, ±8kV contact), with 300A IFSM surge capability and UL 94V-0 mold compound for board-level safety compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 28.9 / 30.4 / 31.9 V - defines minimum trigger threshold and nominal clamping onset point |
| VC @ IPPM | 42.1 V - maximum clamped voltage during 3000W 10/1000µs surge, limiting downstream stress |
| PPPM | 3000 W - peak pulse power handling per IEC/ISO surge standards |
| RD | 0.164 Ω - dynamic resistance determining voltage rise slope under surge current |
| αT | 9.7 × 10−4/°C - temperature coefficient enabling accurate VBR/VC derating above 25°C |
| Junction temp. range | −55°C to +175°C - supports operation in under-hood automotive and industrial environments |
| Package | DO-214AB (SMC) - surface-mount outline with 17°C/W RθJL, optimized for PCB thermal relief |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode indicated by band, weight ≈0.210g, UL 94V-0 rated compound, JESD 201 Class 2 whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or low-voltage rail in unidirectional clamp configuration |
| Cathode | Reverse-biased surge input / protected line connection | Attached to signal/power line requiring protection; clamps to anode when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| ISO 7637-2 Pulse compliance | Withstands repetitive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| IEC 61000-4-2 Level 4 immunity | Survives ±15kV air discharge and ±8kV contact discharge without degradation |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing |
| Low RD (0.164Ω) | Minimizes clamping voltage overshoot during fast-rising transients up to 71.3A |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Suppresses inductive kickback and load dump spikes on gate drivers and power stages of 24–48V BLDC inverters. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or phase outputs to clamp transients before they reach MOSFETs or gate drivers. Use Value: Limits VC to 42.1V during 3000W surges, preventing overvoltage failure of 60V-rated power semiconductors. | Use Scenario: Guards cell monitoring ICs and communication lines in 12–48V EV/HEV battery packs against ISO 7637-2 Pulse 2b and ESD. IC Role / Device Role / Timing Role: Standoff protector on pack voltage sense lines and CAN bus power rails. Use Value: Maintains <5µA leakage at 26V working voltage (VWM), ensuring BMS measurement accuracy while surviving 71.3A surges. |
| Automotive Lighting Control | Switching Mode Power Supply (SMPS) |
Use Scenario: Shields LED driver ICs and microcontrollers in headlamp modules from alternator ripple and relay bounce transients. IC Role / Device Role / Timing Role: Input-stage TVS on 12V supply rail upstream of buck controllers and LED current regulators. Use Value: Clamps to ≤42.1V within nanoseconds, protecting 36V-input-rated drivers without adding capacitance-induced instability. | Use Scenario: Protects primary-side MOSFETs and secondary-side rectifiers in 24–48V industrial SMPS against line surges and transformer leakage spikes. IC Role / Device Role / Timing Role: Bidirectional clamping is not required; unidirectional 3KSMC30AH used on DC output rails where polarity is fixed. Use Value: Delivers 3000W peak power dissipation with RθJA = 50°C/W, enabling compact heatsink-free layout in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | Lower PPPM (600W), higher VC (48.4V), same DO-214AA package | Not suitable for ISO 7637-2 Pulse 1/2a/2b; limited to lower-energy IEC 61000-4-2 only | Select 3KSMC30AH when 3000W surge immunity and automotive pulse compliance are mandatory |
| SMCJ30A | Same DO-214AB package and 3000W rating, but non-AEC-Q101; VC = 48.4V (higher than 42.1V) | Lacks AEC-Q101 qualification and ISO 7637-2 Pulse 3b validation; intended for industrial, not automotive use | Choose 3KSMC30AH for automotive BMS or lighting where AEC-Q101 and tighter clamping are required |
Compared with SMBJ30A and SMCJ30A, the 3KSMC30AH delivers superior clamping performance (42.1V vs. ≥48.4V), AEC-Q101 qualification, and full ISO 7637-2 Pulse 1–3b compliance-making it the only option among the three qualified for under-hood automotive deployment with strict voltage margin constraints.
Availability
3KSMC30AH is available at Aetrix Electronics and suitable for BLDC motor drives, battery management systems, and automotive lighting applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 3KSMC30AH 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, MOSFETs, and automotive-qualified components.
The 3KSMCxxAH series was developed specifically for high-reliability automotive power line protection, targeting ISO 7637-2 and AEC-Q101 requirements in engine control units, body electronics, and electrified vehicle subsystems.
FAQ
What is the maximum clamping voltage of the 3KSMC30AH under a 10/1000µs surge?
The 3KSMC30AH has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated 3000W peak pulse power with a 10/1000µs waveform. This value is measured at IPPM = 71.3 A and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. The 3KSMC30AH maintains this clamping performance across its operating temperature range due to its 9.7×10−4/°C temperature coefficient.
Is the 3KSMC30AH suitable for automotive applications?
Yes, the 3KSMC30AH is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements and complies with IEC 61000-4-2 Level 4 ESD immunity. Its −55°C to +175°C junction temperature range, halogen-free construction, and JESD 201 Class 2 whisker resistance make the 3KSMC30AH appropriate for under-hood and chassis-mounted electronic modules.
What is the working peak reverse voltage (VWM) of the 3KSMC30AH?
The working peak reverse voltage (VWM) of the 3KSMC30AH is 26 V, meaning it can continuously block up to 26 V in reverse bias without significant leakage. At this voltage, maximum reverse leakage current is specified as 3 µA. This allows safe integration into 24 V automotive and industrial systems where nominal rail voltage may reach 28–30 V during charging transients.
Does the 3KSMC30AH have polarity marking, and how is it identified?
Yes, the 3KSMC30AH features unidirectional polarity clearly marked by a cathode band on the DO-214AB (SMC) package body. The banded end corresponds to the cathode terminal, which must be connected toward the protected line or higher-potential node, while the anode connects to ground or the return path. This marking is visible under standard optical inspection and aligns with JEDEC-standard SMC orientation conventions.
What is the thermal resistance from junction to ambient (RθJA) for the 3KSMC30AH?
The junction-to-ambient thermal resistance (RθJA) of the 3KSMC30AH is 50 °C/W when mounted on a standard 16 mm × 16 mm copper pad test board, per the manufacturer's thermal characterization. This value assumes no additional heatsinking and guides thermal design for continuous power dissipation limits. For higher-power pulsed operation, the 3KSMC30AH relies on its 3000W peak rating rather than steady-state thermal limits.
3KSMC30AH 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):
- 26V (Max)
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71.3A
- 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)
3KSMC30AH FAQ
1.How can I place an order for 3KSMC30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KSMC30AH 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 3KSMC30AH reliable?
The price and inventory of 3KSMC30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KSMC30AH is usually 5 days.
3.What payment methods are accepted for 3KSMC30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KSMC30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KSMC30AH?
3KSMC30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KSMC30AH 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 3KSMC30AH?
For technical support, including 3KSMC30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KSMC30AH requirements.
6.How does Aetrix verify that 3KSMC30AH is sourced from the original manufacturer or authorized distributors?
All 3KSMC30AH 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 3KSMC30AH meets industry standards.
7.What is the process for return or replacement of 3KSMC30AH?
All 3KSMC30AH units undergo pre-shipment inspection (PSI). If there is an issue with 3KSMC30AH, 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 3KSMC30AH part is unused and in its original packaging.
Return procedure for 3KSMC30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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