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Taiwan Semiconductor Corporation 1KSMB47AH
- Part No.:
- 1KSMB47AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB47AH.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,638
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Product details
Overview
1KSMB47AH from Taiwan Semiconductor is a unidirectional 1000W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 44.7–49.4 V, stand-off voltage 40.2 V, clamping voltage 64.8 V at 15.4 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1KSMB47AH datasheet, 1KSMB47AH pinout, 1KSMB47AH application, or 1KSMB47AH equivalent, key selection criteria include its 10/1000 µs surge rating, glass-passivated junction, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, moisture sensitivity level 1, and suitability for ESD and inductive load transient protection in space-constrained PCB layouts.
Technical Context
The 1KSMB47AH operates as a unidirectional avalanche-clamping device, triggered when reverse voltage exceeds its 44.7 V minimum breakdown threshold at 1 mA test current. Its fast response time (<1.0 ps) ensures suppression before sensitive downstream circuitry sustains damage.
Thermal performance is defined by RθJL = 20 °C/W and RθJA = 100 °C/W, supporting operation from –55 °C to +175 °C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for molded compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 44.7 V / 49.4 V - defines minimum and maximum voltage at which avalanche conduction begins under 1 mA DC test current |
| VWM | 40.2 V - maximum continuous reverse operating voltage; circuit must stay below this to avoid leakage-induced power loss |
| VC@IPP | 64.8 V @ 15.4 A - clamped voltage during 10/1000 µs surge; determines peak stress on protected IC inputs |
| PPPSM | 1000 W - non-repetitive peak pulse power handling capability per standard 10/1000 µs waveform |
| IPP | 15.4 A - maximum peak impulse current the device can safely divert without degradation |
| TJ max | +175 °C - maximum allowable junction temperature; enables high-temperature under-hood automotive deployment |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 0.110 g mass and matte tin-plated leads per J-STD-002 |
Pinout & Package
DO-214AA (SMB) package: cathode-banded monolithic unidirectional TVS diode with two terminals - anode and cathode - mounted in a rectangular molded body measuring 4.57 mm × 3.94 mm × 2.29 mm (L × W × H). Cathode band denotes polarity per marking diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; establishes reference for clamping action |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., CAN_H, LIN, sensor supply); conducts surge current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control, body modules, and infotainment systems requiring zero defect reliability |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Withstands standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b), enabling direct integration into vehicle E/E architecture |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or baking prior to reflow soldering, reducing manufacturing overhead |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant production |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 40.2 V before reaching PMIC or MCU input stages. Use Value: Limits peak clamped voltage to 64.8 V at 15.4 A, preventing latch-up or oxide breakdown in 3.3 V/5 V logic rails downstream. | Use Scenario: Safeguarding analog front-end inputs of pressure or temperature sensors exposed to ESD in factory automation. IC Role / Device Role / Timing Role: Placed across sensor signal lines (e.g., 4–20 mA loop or differential pair) to shunt ESD pulses to ground. Use Value: Sub-1 ps response ensures clamping occurs before transient energy couples into precision amplifier inputs, preserving measurement integrity. |
| LED Driver Output Protection | Automotive LIN Bus Protection |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback when driving solenoids or relays. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-driver output to absorb reverse EMF spikes during switch-off. Use Value: 1000 W peak power rating handles repetitive 8.3 ms half-sine surges up to 100 A IFSM, extending driver MOSFET lifetime. | Use Scenario: Adding robustness to LIN transceiver pins against cable discharge events and board-level ESD. IC Role / Device Role / Timing Role: Positioned between LIN bus line and ground to suppress ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: Low 1.0 µA leakage at 40.2 V ensures minimal impact on LIN bus biasing and wake-up sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | Same DO-214AA package, identical VBR (44.7–49.4 V), but rated at 600 W PPPSM vs. 1000 W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select 1KSMB47AH where full 1000 W surge immunity is required in automotive power domains |
| 1.5SMC47A | Higher-power 1500 W rating, same VBR range, but larger DO-214AB (SMC) package (7.11 × 6.22 mm) | Requires PCB layout revision due to 2.5× footprint increase; not drop-in compatible | Choose 1KSMB47AH when space constraints mandate SMB outline without sacrificing 1000 W capability |
Compared with SMBJ47A and 1.5SMC47A, the 1KSMB47AH uniquely delivers 1000 W surge protection in the compact DO-214AA footprint while maintaining AEC-Q101 qualification-making it optimal for high-density automotive modules where both power handling and board area are critical.
Availability
1KSMB47AH is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, LED driver output safeguarding, and LIN bus transient suppression requiring stable component supply across extended production cycles.
Supply support for 1KSMB47AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and automotive-qualified components.
The 1KSMBxxAH series is designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and surface-mount manufacturability.
FAQ
What is the breakdown voltage tolerance of the 1KSMB47AH?
The 1KSMB47AH has a specified breakdown voltage range of 44.7 V to 49.4 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 47 V rating. This range is measured per ANSI/IEEE C62.35 and confirmed in the Electrical Specifications table of the official TSC datasheet Version A2102.
Is the 1KSMB47AH suitable for bidirectional transient protection?
No, the 1KSMB47AH is unidirectional only. For bidirectional operation, the 1KSMB47CAH variant must be used - indicated by the "CAH" suffix. The 1KSMB47AH features a cathode band marking and is intended for DC-biased lines where reverse conduction is not required.
What is the maximum clamping voltage of the 1KSMB47AH under surge conditions?
The 1KSMB47AH exhibits a maximum clamping voltage (VC) of 64.8 V when subjected to its rated peak pulse current of 15.4 A using the standard 10/1000 µs waveform. This value is guaranteed across temperature and represents the highest voltage seen across the device during worst-case transient events.
Does the 1KSMB47AH require special handling during PCB assembly?
No - the 1KSMB47AH has Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without baking or dry-packing. Its matte tin-plated leads comply with J-STD-002 for reliable solder wetting.
How does the 1KSMB47AH compare to standard SMBJ-series TVS diodes in surge capability?
The 1KSMB47AH delivers 1000 W peak pulse power, whereas SMBJ47A is rated at 600 W. Both share identical DO-214AA packaging and VBR range, but the 1KSMB47AH's higher PPPSM enables robust protection against severe automotive transients like load dump (ISO 7637-2 Pulse 5a), which the SMBJ47A cannot sustain.
1KSMB47AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- 1KSMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 1000W (1kW)
- 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-214AA (SMB)
1KSMB47AH FAQ
1.How can I place an order for 1KSMB47AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB47AH 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 1KSMB47AH reliable?
The price and inventory of 1KSMB47AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB47AH is usually 5 days.
3.What payment methods are accepted for 1KSMB47AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB47AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB47AH?
1KSMB47AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB47AH 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 1KSMB47AH?
For technical support, including 1KSMB47AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB47AH requirements.
6.How does Aetrix verify that 1KSMB47AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB47AH 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 1KSMB47AH meets industry standards.
7.What is the process for return or replacement of 1KSMB47AH?
All 1KSMB47AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB47AH, 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 1KSMB47AH part is unused and in its original packaging.
Return procedure for 1KSMB47AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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