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Taiwan Semiconductor Corporation 1KSMB82A
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- Part No.:
- 1KSMB82A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB82A.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,785
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Product details
Overview
1KSMB82A from Taiwan Semiconductor is a unidirectional 1000W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 77.9–86.1 V, stand-off voltage 70.1 V, clamping voltage 113 V at 8.8 A peak pulse current, and operating junction temperature range −55 °C to +175 °C. It protects DC power rails in switching mode power supplies and adapters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB82A datasheet, 1KSMB82A pinout, 1KSMB82A application, or 1KSMB82A equivalent, key selection criteria include unidirectional polarity, 1000W peak pulse power rating, 70.1 V working voltage, 113 V clamping performance at 8.8 A, and DO-214AA mechanical compatibility with automated SMT placement.
Technical Context
The 1KSMB82A uses a glass-passivated silicon junction for stable avalanche breakdown and fast response (<1.0 ps from 0 V to VBR(min)). Its unidirectional configuration provides reverse-biased transient suppression only, requiring correct cathode orientation in-circuit.
Thermal design relies on RθJL = 20 °C/W and RθJA = 100 °C/W, supporting 5 W steady-state dissipation at 25 °C ambient. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR(min) @ IT = 1 mA | 77.9 V - Minimum breakdown voltage guaranteeing reliable avalanche conduction onset |
| VC @ IPP = 8.8 A | 113 V - Clamped voltage during 10/1000 µs surge, defining maximum protected circuit stress |
| PPPSM | 1000 W - Peak pulse power handling per single 10/1000 µs transient event |
| Junction Temp Range | −55 °C to +175 °C - Enables use in under-hood automotive, industrial SMPS, and high-ambient environments |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.110 g mass and matte tin-plated leads |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; terminals are matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; polarity is marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., IFSM = 100 A) |
| Cathode | Avalanche suppression terminal | Connected to higher-potential side; enters breakdown when reverse voltage exceeds VWM, shunting transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature cycling |
| Response time <1.0 ps | Enables suppression of ultrafast ESD and fast-rising load dump edges before downstream IC damage |
| ISO 7637-2 compliance | Validated for automotive-level transient immunity including Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) |
| Moisture Sensitivity Level 1 | Permits unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier stage subjected to line surges and load dump transients in 24–48 V industrial SMPS. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor or input bridge output to clamp reverse transients. Use Value: Limits voltage excursion to ≤113 V during 1000 W pulses, protecting MOSFETs and controllers rated for 150 V max. | Use Scenario: Secondary-side DC output rail exposed to capacitive coupling and fast-switching noise in compact wall adapters. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VOUT and GND to suppress overshoot during dynamic load steps. Use Value: Maintains 70.1 V working margin while clamping to 113 V, preserving regulation integrity for 5–12 V output systems. |
| Flat Panel Display Power Board | Industrial Motor Drive Control Module |
Use Scenario: 24 V logic supply rail in LCD/LED TV main board experiencing ESD and relay bounce-induced spikes. IC Role / Device Role / Timing Role: Local protection device mounted near DC-DC converter input to absorb sub-microsecond transients. Use Value: Sub-1 ps response ensures clamping activation before 3.3 V/5 V logic ICs experience latch-up or gate oxide stress. | Use Scenario: Auxiliary 24 V control supply in motor drive PCB subject to inductive kickback from solenoid drivers and contactors. IC Role / Device Role / Timing Role: Primary transient shunt on control rail, sized to handle repetitive 10/1000 µs pulses per IEC 61000-4-5. Use Value: 1000 W rating supports >10,000 surge cycles at 8.8 A, meeting industrial equipment longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ80A | VWM = 64.0 V, VC = 125 V @ 8.0 A, PPPM = 600 W | Lower power rating and higher clamping voltage reduce protection margin in high-energy surge environments | Select when cost sensitivity outweighs need for 1000 W headroom and tighter clamping |
| 1.5KE82A | DO-201AD package, axial leaded, VWM = 70.1 V, VC = 113 V @ 8.8 A, PPPM = 1500 W | Through-hole mounting requires manual assembly or wave soldering; unsuitable for fully SMT lines | Choose only for legacy through-hole designs or prototyping where SMB footprint is unavailable |
Compared with SMBJ80A and 1.5KE82A, the 1KSMB82A uniquely balances 1000 W surge capability, DO-214AA SMT compatibility, and 113 V clamping-making it optimal for high-volume, space-constrained industrial and automotive power modules requiring automated assembly and ISO 7637-2 compliance.
Availability
1KSMB82A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat panel display power boards requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for 1KSMB82A 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 power management, protection, and signal conditioning devices.
The 1KSMB series was designed specifically for high-reliability, surface-mount transient suppression in automotive and industrial power conversion systems-emphasizing robustness, automated manufacturability, and standardized compliance testing.
FAQ
What is the polarity configuration of the 1KSMB82A?
The 1KSMB82A is a unidirectional TVS diode, meaning it functions as a reverse-biased avalanche clamp with a clearly marked cathode band. It conducts only when reverse voltage exceeds VWM; forward conduction is limited to surge events up to 100 A. This differs from bidirectional variants like 1KSMB82CA, which suppress transients in both directions without polarity dependence. The 1KSMB82A must be oriented correctly in-circuit to protect against negative-going transients on positive rails.
Does the 1KSMB82A meet automotive transient standards?
Yes, the 1KSMB82A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (battery feed interruption), Pulse 2b (alternator load dump simulation), and Pulses 3a/3b (capacitive coupling and switching noise). Its 1000 W peak pulse rating, 113 V clamping voltage at 8.8 A, and thermal robustness (TJ(max) = 175 °C) make it suitable for 12 V and 24 V automotive subsystems such as body control modules and infotainment power supplies.
What is the maximum clamping voltage of the 1KSMB82A under surge conditions?
The maximum clamping voltage of the 1KSMB82A is 113 V when subjected to an 8.8 A peak impulse current with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage seen by downstream circuitry during worst-case transient events. It is measured at IPP = 8.8 A-not at rated power-and defines the upper limit of protection for components rated below 120 V.
Can the 1KSMB82A be used in place of a 1KSMB82CA?
No, the 1KSMB82A cannot directly replace the 1KSMB82CA because they differ in polarity configuration: the 1KSMB82A is unidirectional, while the 1KSMB82CA is bidirectional. Substituting one for the other without circuit review risks failure to suppress positive-going transients (if using 1KSMB82A where 1KSMB82CA is specified) or unintended forward conduction (if using 1KSMB82CA on a DC rail with polarity constraints). Always verify system-level transient directionality before interchange.
What is the moisture sensitivity level and reflow profile requirement for the 1KSMB82A?
The 1KSMB82A has a Moisture Sensitivity Level (MSL) of 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60 % RH without baking prior to reflow. It supports standard Pb-free reflow profiles with peak temperatures up to 260 °C, and its matte tin-plated leads comply with J-STD-002 for solderability. No floor-life restrictions or pre-bake steps are required, simplifying SMT line integration and reducing process risk.
1KSMB82A 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):
- 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)
1KSMB82A FAQ
1.How can I place an order for 1KSMB82A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB82A 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 1KSMB82A reliable?
The price and inventory of 1KSMB82A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB82A is usually 5 days.
3.What payment methods are accepted for 1KSMB82A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB82A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB82A?
1KSMB82A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB82A 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 1KSMB82A?
For technical support, including 1KSMB82A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB82A requirements.
6.How does Aetrix verify that 1KSMB82A is sourced from the original manufacturer or authorized distributors?
All 1KSMB82A 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 1KSMB82A meets industry standards.
7.What is the process for return or replacement of 1KSMB82A?
All 1KSMB82A units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB82A, 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 1KSMB82A part is unused and in its original packaging.
Return procedure for 1KSMB82A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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