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Taiwan Semiconductor Corporation 1KSMB82CA
- Part No.:
- 1KSMB82CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB82CA.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,053
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Product details
Overview
1KSMB82CA from Taiwan Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, rated for 1000W peak pulse power, 77.9–86.1V breakdown voltage (VBR), and 113V maximum clamping voltage (VC@IPP). It protects DC power rails and signal lines in switching mode power supplies, adapters, and display electronics against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB82CA datasheet, 1KSMB82CA pinout, 1KSMB82CA application, or 1KSMB82CA equivalent, key selection criteria include its bi-directional configuration, 70.1V stand-off voltage (VWM), <1.0ps response time, 8.8A peak impulse current (IPP), and compliance with J-STD-020 moisture sensitivity level 1 and RoHS/halogen-free requirements.
Technical Context
The 1KSMB82CA employs a glass passivated silicon junction optimized for fast transient suppression in automotive and industrial environments. Its bi-directional architecture enables symmetric clamping across both polarities without external polarity management, supporting robust protection of AC-coupled or floating signal paths.
It meets ISO 7637-2 test pulses including Pulse 1 (inductive load dump), Pulse 2a (sudden load disconnect), Pulse 2b (supply line inductive spike), and Pulses 3a/3b (capacitive coupled noise), with thermal performance defined by RθJL = 20°C/W and RθJA = 100°C/W under standard mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 77.9 V / 86.1 V - Ensures reliable triggering above 70.1 V operating voltage while accommodating manufacturing tolerance |
| VWM | 70.1 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC@IPP | 113 V - Clamped voltage during 10/1000 µs surge at 8.8 A, limiting downstream stress |
| PPPSM | 1000 W - Peak pulse power handling per single 10/1000 µs transient event |
| IPP | 8.8 A - Maximum non-repetitive surge current supported at rated VC |
| TJ max | 175 °C - Junction temperature limit enabling operation in high-ambient industrial environments |
| Response time | <1.0 ps - Enables suppression before sensitive circuitry experiences overvoltage damage |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional TVS terminals | No functional distinction - either terminal accepts positive or negative transients; no PCB polarity orientation needed |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for long-term reliability in unattended systems |
| ISO 7637-2 compliance | Validated for automotive-grade transient immunity (Pulse 1/2a/2b/3a/3b), reducing need for additional filtering stages |
| Moisture sensitivity level 1 | Eliminates bake-out requirement prior to reflow, compatible with standard SMT assembly processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives, supporting green manufacturing and export compliance |
| DO-214AA mechanical robustness | UL 94V-0 molding compound and JESD 201 Class 2 whisker resistance ensure reliability in vibration-prone applications |
Applications
| Switching Mode Power Supply (SMPS) | Adapter Protection |
|---|---|
Use Scenario: Input rectifier stage and secondary-side DC bus in offline AC/DC converters subject to line surges and load-dump events. IC Role / Device Role / Timing Role: Bi-directional TVS clamp absorbing 10/1000 µs transients on primary and secondary rails without polarity constraints. Use Value: Limits voltage excursion to ≤113 V during 8.8 A surges, protecting MOSFETs, controllers, and optocouplers from overvoltage failure. | Use Scenario: USB-C PD and legacy wall adapters exposed to ESD and conducted noise from mains or connected devices. IC Role / Device Role / Timing Role: Primary-level transient suppressor placed across input capacitor or output rail to meet IEC/EN 61000-4-5 Level 3. Use Value: Withstands ≥1000W pulses while maintaining <1 µA leakage at 70.1 V, preserving standby efficiency and regulatory compliance. |
| Television Power Board | Monitor Signal Interface |
Use Scenario: 12 V/24 V auxiliary supply rails in smart TVs where microcontroller resets or audio amplifier latch-up must be prevented. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing repetitive switch-mode noise and infrequent lightning-induced surges. Use Value: 175 °C max junction temperature supports operation near heat-generating power ICs without derating. | Use Scenario: HDMI, DisplayPort, or LVDS differential pairs carrying high-speed video signals susceptible to ESD and crosstalk-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp (typ. <100 pF at VWM) minimizing signal integrity impact. Use Value: Sub-1 ps response ensures clamping occurs before edge-rate-sensitive receivers experience overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ82CA (Bourns) | Same DO-214AA package, identical VBR (77.9–86.1 V), but higher VC = 115 V and lower IPP = 8.7 A | Slightly reduced clamping margin; suitable where layout allows minor VC increase | Acceptable alternative if 2 V higher clamping voltage is within system OV threshold |
| P6SMB82CA (ON Semiconductor) | Same footprint and ratings, but specified with tighter VBR tolerance (±5% vs ±6.5%) and higher RθJA = 110°C/W | Better voltage consistency but reduced thermal margin in high-density layouts | Preferred where precise VBR matching is prioritized over thermal headroom |
Compared with SMBJ82CA and P6SMB82CA, the 1KSMB82CA offers the lowest clamping voltage (113 V) and best thermal resistance (RθJA = 100°C/W), making it optimal for space-constrained, high-power-density designs requiring minimal voltage overshoot and efficient heat dissipation.
Availability
1KSMB82CA is available at Aetrix Electronics and suitable for switching mode power supplies, adapter protection circuits, and television power board designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1KSMB82CA 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 industrial, computing, and consumer markets since 1979.
The 1KSMB series is part of TSC's transient protection portfolio designed specifically for high-reliability, surface-mount TVS applications in automotive, industrial power, and consumer electronics where ISO 7637-2 compliance and JEDEC-compliant packaging are mandatory.
FAQ
What does the 'CA' suffix indicate in 1KSMB82CA?
The 'CA' suffix in 1KSMB82CA denotes a bi-directional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike uni-directional variants (e.g., 1KSMB82A), the 1KSMB82CA has no cathode marking and functions identically regardless of terminal orientation. This eliminates polarity-dependent layout constraints and simplifies design for AC-coupled or floating interfaces where bidirectional protection is essential.
What is the maximum clamping voltage of 1KSMB82CA under standard test conditions?
The maximum clamping voltage (VC) of the 1KSMB82CA is 113 V when subjected to an 8.8 A peak impulse current (IPP) with a 10/1000 µs waveform at TA = 25°C. This value is measured across the device terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events. Designers use this parameter to verify that downstream components remain within their absolute maximum voltage ratings during worst-case surges.
Is 1KSMB82CA compliant with automotive transient standards?
Yes, the 1KSMB82CA meets ISO 7637-2 requirements for automotive electrical disturbances, including Pulse 1 (inductive load dump), Pulse 2a (sudden load disconnect), Pulse 2b (supply line inductive spike), and Pulses 3a/3b (capacitive coupled noise). Its 1000 W peak pulse rating, fast <1.0 ps response time, and bi-directional architecture make it suitable for protecting ECUs, infotainment power rails, and sensor interface circuits in 12 V and 24 V vehicle systems without additional external components.
What is the moisture sensitivity level (MSL) of 1KSMB82CA and how does it affect assembly?
The 1KSMB82CA has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not sensitive to moisture absorption and may be stored indefinitely at ambient conditions without baking prior to reflow soldering. This eliminates pre-bake steps, reduces process complexity, and supports compatibility with standard SMT assembly lines using lead-free or SnPb profiles-critical for high-volume manufacturing of adapters, monitors, and power supplies where throughput and yield are prioritized.
How does the thermal resistance of 1KSMB82CA impact its power handling capability?
The 1KSMB82CA features a junction-to-ambient thermal resistance (RθJA) of 100°C/W and junction-to-lead resistance (RθJL) of 20°C/W under standard PCB mounting. These values directly determine its ability to dissipate energy during repeated transients: lower RθJA allows higher average power handling before exceeding the 175°C maximum junction temperature. In practice, this enables sustained operation in compact, thermally constrained layouts such as slim TV power boards or multi-rail adapter PCBs where heatsinking is impractical.
1KSMB82CA 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
1KSMB82CA FAQ
1.How can I place an order for 1KSMB82CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB82CA 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 1KSMB82CA reliable?
The price and inventory of 1KSMB82CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB82CA is usually 5 days.
3.What payment methods are accepted for 1KSMB82CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB82CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB82CA?
1KSMB82CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB82CA 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 1KSMB82CA?
For technical support, including 1KSMB82CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB82CA requirements.
6.How does Aetrix verify that 1KSMB82CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB82CA 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 1KSMB82CA meets industry standards.
7.What is the process for return or replacement of 1KSMB82CA?
All 1KSMB82CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB82CA, 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 1KSMB82CA part is unused and in its original packaging.
Return procedure for 1KSMB82CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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