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Taiwan Semiconductor Corporation 1KSMB100CA
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- Part No.:
- 1KSMB100CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB100CA.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,797
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Product details
Overview
1KSMB100CA from Taiwan Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 1000W peak pulse power, 100V breakdown voltage (min 95V, max 105V), and clamping voltage of 137V at 7.3A peak current. It protects DC power rails in switching mode power supplies and consumer displays against ISO 7637-2 transients.
For engineers reviewing the 1KSMB100CA datasheet, 1KSMB100CA pinout, 1KSMB100CA application, or 1KSMB100CA equivalent, key selection criteria include bidirectional clamping capability, 100V standoff rating (VWM = 85.5V), sub-1ps response time, UL 94V-0 molding, and JESD201 Class 2 whisker resistance - all validated for automotive-grade surge immunity.
Technical Context
The 1KSMB100CA implements a glass-passivated silicon junction optimized for fast transient suppression with bidirectional symmetry. Its 10/1000µs waveform rating supports ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b compliance without external biasing.
Thermally, it features RθJL = 20°C/W and RθJA = 100°C/W, enabling 5W steady-state dissipation at 25°C ambient. Junction temperature range spans −55°C to +175°C, matching under-hood and industrial enclosure requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 95 V / 105 V - ensures reliable conduction onset above 85.5 V standoff, preventing false triggering during normal operation |
| VWM | 85.5 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC@IPP | 137 V @ 7.3 A - clamped voltage during 10/1000µs surge, limiting downstream IC stress to safe levels |
| PPPSM | 1000 W - peak pulse power handling per single transient event, per IEC 61000-4-5 Level 4 |
| Response Time | <1.0 ps - enables suppression before sensitive logic or analog circuitry sustains damage |
| Package | DO-214AA (SMB) - surface-mount footprint compatible with automated placement and reflow profiles |
Pinout & Package
DO-214AA (SMB) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bi-directional 1KSMB100CA; terminals are symmetrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminal pair | Identical electrical behavior in both directions; no polarity marking required - simplifies PCB layout and orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transients without external filtering |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained applications |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display TV |
|---|---|
Use Scenario: Input rectifier stage subjected to line surges and EFT bursts during AC mains coupling. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across bulk capacitor input to limit transient overvoltage. Use Value: Clamps 1000W surges to ≤137V, protecting bridge rectifier and PFC controller from destructive overvoltage. | Use Scenario: HDMI/USB interface lines exposed to ESD and cable discharge events in living-room environments. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage DC rails (e.g., 12V backlight, 5V USB port). Use Value: Sub-1ps response prevents latch-up in display timing controllers and TCON ICs during fast transients. |
| Automotive Infotainment Head Unit | Industrial Monitor Power Input |
Use Scenario: 12V battery rail subjected to ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3b (capacitive coupling). IC Role / Device Role / Timing Role: Primary transient suppressor on main power entry before DC-DC converters. Use Value: Withstands 1000W pulses while maintaining VWM = 85.5V, ensuring compatibility with 12V nominal systems with ±15% variation. | Use Scenario: 24V industrial monitor powered from factory floor supply with high noise and motor-switching transients. IC Role / Device Role / Timing Role: Front-end protection on AC/DC adapter output feeding display logic and backlight drivers. Use Value: UL 94V-0 compound and −55°C to +175°C operating range support uncontrolled ambient deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA (ON Semiconductor) | Same DO-214AA package, identical 100V VBR range (95–105V), but VC = 143V @ 7.0A (vs. 137V @ 7.3A) | Slightly higher clamping voltage reduces margin for 120V-rated downstream components | Select when sourcing diversity is required and 6V higher clamping is acceptable |
| P6SMB100CA (STMicroelectronics) | Same package and VBR, but PPPSM = 600W (vs. 1000W); IPP = 4.4A @ VC = 143V | Lower surge rating limits use to non-automotive or lower-energy transient environments | Prefer for cost-sensitive industrial adapters where ISO 7637-2 compliance is not mandated |
Compared with SMBJ100CA and P6SMB100CA, the 1KSMB100CA delivers superior 1000W surge capacity and tighter 137V clamping - critical for automotive front-end protection where voltage margin directly impacts system-level robustness and qualification success.
Availability
1KSMB100CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer display TVs, and automotive infotainment head units requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1KSMB100CA 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, and rectifiers with global AEC-Q200 qualified production lines.
The 1KSMB series was designed specifically for high-reliability transient suppression in automotive and industrial power interfaces, emphasizing robust surge handling, tight parametric control, and automated assembly compatibility.
FAQ
What is the breakdown voltage tolerance for 1KSMB100CA?
The 1KSMB100CA has a specified breakdown voltage range of 95 V to 105 V at 1.0 mA test current, corresponding to ±5% tolerance around the nominal 100 V rating. This is confirmed in the Electrical Specifications table on page 2 of the Taiwan Semiconductor datasheet revision I2102, and applies strictly to the 1KSMB100CA variant - not extrapolated from adjacent part numbers.
Is 1KSMB100CA unidirectional or bidirectional?
The "CA" suffix in 1KSMB100CA explicitly denotes bidirectional configuration per Taiwan Semiconductor's ordering documentation. Unlike "A"-suffixed variants, the 1KSMB100CA has symmetrical clamping in both polarities and no cathode marking - verified in the "Devices for Bipolar Applications" section and mechanical outline diagram.
What is the maximum clamping voltage of 1KSMB100CA and at what current?
The 1KSMB100CA exhibits a maximum clamping voltage (VC) of 137 V at a peak impulse current (IPP) of 7.3 A under 10/1000 µs waveform conditions. This value is measured and guaranteed per the Electrical Specifications table on page 2 of the official datasheet (I2102), and defines the upper voltage limit imposed on protected circuits during surge events.
Does 1KSMB100CA meet automotive transient standards?
Yes, the 1KSMB100CA is explicitly stated to meet ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b in the Features section of the Taiwan Semiconductor datasheet (I2102). Its 1000W peak power rating and 137V clamping performance are validated for these waveforms without additional external components.
What is the thermal resistance from junction to lead for 1KSMB100CA?
The junction-to-lead thermal resistance (RθJL) for 1KSMB100CA is 20°C/W, as published in the Thermal Performance table of the Taiwan Semiconductor datasheet (I2102). This parameter enables accurate calculation of junction temperature rise under pulsed power conditions and supports thermal design of PCB copper pour and heatsinking strategies.
1KSMB100CA 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB100CA FAQ
1.How can I place an order for 1KSMB100CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB100CA 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 1KSMB100CA reliable?
The price and inventory of 1KSMB100CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB100CA is usually 5 days.
3.What payment methods are accepted for 1KSMB100CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB100CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB100CA?
1KSMB100CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB100CA 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 1KSMB100CA?
For technical support, including 1KSMB100CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB100CA requirements.
6.How does Aetrix verify that 1KSMB100CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB100CA 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 1KSMB100CA meets industry standards.
7.What is the process for return or replacement of 1KSMB100CA?
All 1KSMB100CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB100CA, 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 1KSMB100CA part is unused and in its original packaging.
Return procedure for 1KSMB100CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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