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Taiwan Semiconductor Corporation 1KSMB100AH
- Part No.:
- 1KSMB100AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB100AH.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,703
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Product details
Overview
1KSMB100AH from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 95–105 V, stand-off voltage 85.5 V, clamping voltage 137 V at 7.3 A, and AEC-Q101 qualification for automotive-grade surge protection in power supply rails and interface lines.
For engineers reviewing the 1KSMB100AH datasheet, 1KSMB100AH pinout, 1KSMB100AH application, or 1KSMB100AH equivalent, this device serves as a high-energy, fast-response (sub-1 ps) unidirectional TVS for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, ESD/inductive switching transient suppression, and robust junction temperature operation up to +175°C.
Technical Context
The 1KSMB100AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver precise voltage clamping during transients. Its 10/1000 µs waveform rating supports 1000 W peak pulse power, with thermal resistance RθJL = 20 °C/W enabling effective heat transfer to PCB copper.
Designed for surface-mount automated placement, it meets J-STD-020 moisture sensitivity level 1 and JESD 201 Class 2 whisker resistance. Polarity is marked by cathode band; forward voltage is 5.0 V max at 50 A due to VBR > 50 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 95 V / 105 V - defines minimum and maximum guaranteed avalanche onset under 1 mA test current |
| VWM | 85.5 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC@IPP | 137 V @ 7.3 A - clamped voltage during 10/1000 µs transient, limiting downstream stress |
| PPPSM | 1000 W - peak pulse power handling capability per standard 10/1000 µs waveform |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| IFSM | 100 A - peak forward surge current tolerance for 8.3 ms half-sine wave (unidirectional only) |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode unidirectional configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.110 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge events |
| Cathode | Clamping terminal | Marked with band; connected to higher-potential rail; avalanches into conduction when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal and humidity stress |
| Sub-1 ps response time | Enables clamping before transient energy couples into sensitive IC inputs or power stages |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow, eliminating bake requirements in SMT assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 85.5 V. Use Value: Limits voltage to ≤137 V during 1000 W pulses, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, minimizing signal distortion while suppressing ±8 kV contact ESD. Use Value: Sub-1 ps response ensures clamping occurs before ESD pulse edge reaches sensor amplifier input stage. |
| LED Driver Overvoltage Protection | Motor Control Gate Drive Line Protection |
Use Scenario: Shielding constant-current LED drivers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: TVS across driver output to absorb flyback energy from LED string inductance. Use Value: 1000 W peak power rating handles repetitive 10/1000 µs transients without degradation over lifetime. | Use Scenario: Preventing gate oxide failure in MOSFET drivers caused by Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Unidirectional TVS from gate drive line to source, clamping positive-going overshoot. Use Value: 85.5 V stand-off allows compatibility with 60 V gate drivers while clamping spikes to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A | Same DO-214AA package; VBR = 111–123 V, VC = 162 V @ 6.2 A; 1000 W rating | Higher clamping voltage reduces margin for 100 V-rated systems; suitable where higher VWM not required | Select SMBJ100A if system tolerates 162 V clamping and requires broader VBR tolerance |
| 1.5SMC100A | DO-214AB (SMC) package; larger footprint; VBR = 105–116 V, VC = 165 V @ 6.1 A; same 1000 W rating | Larger thermal mass improves power derating but incompatible with SMB land pattern | Choose 1.5SMC100A only when board layout allows SMC pad dimensions and higher thermal inertia is needed |
Compared with SMBJ100A and 1.5SMC100A, the 1KSMB100AH offers tighter VBR (95–105 V), lower clamping (137 V), and AEC-Q101 qualification-making it preferred for space-constrained, automotive-compliant designs requiring precise voltage limiting.
Availability
1KSMB100AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver overvoltage suppression requiring stable component supply and full traceability.
Supply support for 1KSMB100AH 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, with global distribution and AEC-Q101 validation capabilities.
The 1KSMB series is designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping voltage, fast response, and robust package integrity under thermal and mechanical stress.
FAQ
What is the breakdown voltage range for the 1KSMB100AH?
The 1KSMB100AH has a guaranteed breakdown voltage range of 95 V to 105 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight VBR window ensures consistent clamping behavior across production lots and enables reliable design margining against 100 V system rails.
Is the 1KSMB100AH suitable for bidirectional transient protection?
No-the 1KSMB100AH is unidirectional. For bidirectional protection, use the 1KSMB100CAH variant, which features symmetrical breakdown in both polarities. The "AH" suffix explicitly denotes unidirectional configuration, with cathode band marking indicating polarity orientation during PCB layout.
Does the 1KSMB100AH meet automotive qualification standards?
Yes-the 1KSMB100AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. This certification validates its suitability for under-hood and body-control module applications in passenger and commercial vehicles.
What is the maximum clamping voltage of the 1KSMB100AH during a 10/1000 µs transient?
The 1KSMB100AH clamps to a maximum of 137 V at 7.3 A peak pulse current under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can the 1KSMB100AH be used in high-humidity environments?
Yes-the 1KSMB100AH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life before reflow and no baking requirement. Its matte tin-plated leads and UL 94V-0 molding compound provide robust resistance to moisture ingress and electrochemical migration in humid or condensing conditions.
1KSMB100AH 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB100AH FAQ
1.How can I place an order for 1KSMB100AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB100AH 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 1KSMB100AH reliable?
The price and inventory of 1KSMB100AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB100AH is usually 5 days.
3.What payment methods are accepted for 1KSMB100AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB100AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB100AH?
1KSMB100AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB100AH 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 1KSMB100AH?
For technical support, including 1KSMB100AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB100AH requirements.
6.How does Aetrix verify that 1KSMB100AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB100AH 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 1KSMB100AH meets industry standards.
7.What is the process for return or replacement of 1KSMB100AH?
All 1KSMB100AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB100AH, 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 1KSMB100AH part is unused and in its original packaging.
Return procedure for 1KSMB100AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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