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Taiwan Semiconductor Corporation 1KSMB82CAH
- Part No.:
- 1KSMB82CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB82CAH.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,100
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Product details
Overview
1KSMB82CAH 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, 82V breakdown voltage (min 77.9V, max 86.1V), and clamps to 113V at 8.8A peak impulse current. It is AEC-Q101 qualified and designed for automotive ESD and load-dump protection.
For engineers reviewing the 1KSMB82CAH datasheet, 1KSMB82CAH pinout, 1KSMB82CAH application, or 1KSMB82CAH equivalent, key selection criteria include bi-directional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, moisture sensitivity level 1, and junction temperature range of –55°C to +175°C.
Technical Context
The 1KSMB82CAH implements a glass-passivated silicon junction optimized for fast transient suppression with sub-1ps response time from 0 V to VBR(min). Its bi-directional configuration enables symmetrical clamping for AC-coupled or floating signal lines without polarity concerns.
It operates within a 10/1000µs standard surge waveform envelope, delivering 113V clamping voltage at 8.8A IPP while maintaining ≤1.0µA reverse leakage at its 70.1V stand-off voltage. Thermal performance is characterized by RθJL = 20°C/W and RθJA = 100°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 77.9 V / 86.1 V - defines guaranteed breakdown onset under 1mA test current; sets minimum overvoltage threshold before conduction |
| VWM | 70.1 V - maximum continuous reverse operating voltage; ensures no conduction during normal system operation |
| VC@IPP | 113 V @ 8.8 A - clamping voltage under 10/1000µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPSM | 1000 W - peak pulse power rating; defines single-event surge energy handling capacity per IEC 61000-4-5/ISO 7637-2 |
| TJ Range | –55°C to +175°C - operational junction temperature window; supports under-hood automotive deployment |
| Configuration | Bi-directional - enables symmetric transient suppression on AC or ungrounded lines without orientation dependency |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bi-directional devices; terminals are symmetrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional TVS terminals | Either terminal serves as anode or cathode depending on instantaneous polarity; no mounting orientation requirement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JESD47 |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) requirements |
| Moisture sensitivity level 1 | Enables direct placement without baking; eliminates pre-reflow moisture mitigation steps in SMT line |
Applications
| Automotive Infotainment Power Rails | Industrial CAN Bus Transceivers |
|---|---|
Use Scenario: Protecting 12V supply inputs of head units and display modules from battery load-dump spikes up to ±100V. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed upstream of DC-DC converters and LDOs to limit input voltage excursion. Use Value: Clamps 1000W surges to ≤113V, preventing damage to downstream regulators rated for 16V–36V input. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD events and coupled transients in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional shunt device across bus lines to divert fast transients before they reach transceiver I/O pins. Use Value: Sub-1ps response ensures clamping activation prior to transceiver internal protection triggering, reducing failure risk. |
| LED Headlamp Driver Outputs | Smart Sensor Signal Conditioning |
Use Scenario: Suppressing inductive kickback from high-side MOSFET switches driving LED strings in adaptive front lighting systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED load to absorb stored inductor energy during turn-off. Use Value: Withstands 8.8A peak impulse current and maintains <1µA leakage at 70.1V, preserving driver efficiency during steady-state operation. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from EFT bursts in HVAC control boards. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp on signal lines to prevent latch-up or offset shift in precision amplifiers. Use Value: Junction capacitance <100pF at VWM minimizes signal integrity impact on kHz-range sensor signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ82CA | Same DO-214AA package, identical 82V VBR range and 1000W rating; manufactured by Vishay; slightly higher VC (116V vs. 113V) | Identical functional role; validated in same ISO 7637-2 test setups | Preferred where dual-sourcing or second-source qualification is required |
| 1.5KE82CA | Through-hole DO-15 package; same electrical specs but larger footprint and lower thermal dissipation (RθJA ≈ 150°C/W) | Not suitable for high-density automotive PCBs requiring surface-mount assembly | Select only when legacy through-hole layout or manual rework constraints apply |
Compared with SMBJ82CA and 1.5KE82CA, the 1KSMB82CAH offers identical surge protection performance in a smaller, AEC-Q101-qualified surface-mount package with superior thermal resistance (RθJA = 100°C/W), making it optimal for space-constrained automotive modules requiring automated placement and high-reliability validation.
Availability
1KSMB82CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and LED lighting drivers requiring stable component supply and AEC-Q101-compliant transient protection.
Supply support for 1KSMB82CAH 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 MOSFETs for automotive and industrial markets.
The 1KSMB series was developed specifically for AEC-Q101-compliant, high-power surface-mount transient suppression in harsh-environment automotive subsystems such as body control, lighting, and communication interfaces.
FAQ
What does the 'CAH' suffix indicate in 1KSMB82CAH?
The 'CAH' suffix denotes a bi-directional configuration. Unlike uni-directional variants ending in 'AH', the 1KSMB82CAH provides symmetrical clamping for both positive and negative transients, eliminating polarity-sensitive placement on PCBs. This makes it ideal for protecting AC-coupled lines, differential buses like CAN, or floating sensor outputs where voltage polarity reversal may occur.
Is 1KSMB82CAH compliant with automotive reliability standards?
Yes, the 1KSMB82CAH is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronic components. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for vehicle electrical system immunity, confirming suitability for under-hood and cabin applications.
What is the maximum clamping voltage of 1KSMB82CAH under surge conditions?
The maximum clamping voltage (VC) of the 1KSMB82CAH is 113 V at a peak impulse current (IPP) of 8.8 A under the standard 10/1000 µs waveform. This value represents the highest voltage the device allows across its terminals during a defined transient event, directly determining the overvoltage stress imposed on downstream ICs and circuits.
Can 1KSMB82CAH be used in place of a uni-directional TVS like 1KSMB82AH?
No - the 1KSMB82CAH is bi-directional and cannot replace the uni-directional 1KSMB82AH in DC-biased applications where forward conduction must be blocked. The 1KSMB82AH conducts only in reverse bias and blocks forward current, whereas the 1KSMB82CAH conducts in both directions. Substitution requires verifying circuit topology, especially presence of DC bias or rectification stages.
What packaging and moisture sensitivity level applies to 1KSMB82CAH?
The 1KSMB82CAH is supplied in DO-214AA (SMB) package on 3,000-piece tape-and-reel format and carries Moisture Sensitivity Level 1 per J-STD-020. This means it can be stored indefinitely at ambient conditions and placed directly into reflow without baking, simplifying SMT line integration and reducing process risk in high-volume automotive manufacturing.
1KSMB82CAH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB82CAH FAQ
1.How can I place an order for 1KSMB82CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB82CAH 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 1KSMB82CAH reliable?
The price and inventory of 1KSMB82CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB82CAH is usually 5 days.
3.What payment methods are accepted for 1KSMB82CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB82CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB82CAH?
1KSMB82CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB82CAH 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 1KSMB82CAH?
For technical support, including 1KSMB82CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB82CAH requirements.
6.How does Aetrix verify that 1KSMB82CAH is sourced from the original manufacturer or authorized distributors?
All 1KSMB82CAH 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 1KSMB82CAH meets industry standards.
7.What is the process for return or replacement of 1KSMB82CAH?
All 1KSMB82CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB82CAH, 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 1KSMB82CAH part is unused and in its original packaging.
Return procedure for 1KSMB82CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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