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Taiwan Semiconductor Corporation 1KSMB100A
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- Part No.:
- 1KSMB100A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB100A.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
1KSMB100A 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 peak pulse power rating of 1000 W under 10/1000 µs waveform. It is designed for overvoltage protection in switching mode power supplies and industrial adapters.
For engineers reviewing the 1KSMB100A datasheet, 1KSMB100A pinout, 1KSMB100A application, or 1KSMB100A equivalent, key selection criteria include unidirectional polarity, 137 V clamping performance at 7.3 A IPP, DO-214AA thermal resistance (RθJA = 100 °C/W), ISO 7637-2 compliance, and moisture sensitivity level 1 handling requirements.
Technical Context
The 1KSMB100A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 95–105 V breakdown range at 1 mA test current. Its fast response time (<1.0 ps) enables suppression of ESD and load-dump transients before downstream circuitry sustains damage.
Thermally, it supports junction temperatures from –55 °C to +175 °C, with RθJL = 20 °C/W and RθJA = 100 °C/W, enabling reliable operation in high-ambient environments when mounted on standard PCB copper areas per DO-214AA pad layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 95 V / 105 V @ IT = 1 mA - defines minimum and maximum voltage at which avalanche conduction begins reliably |
| 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 surge, limiting stress on protected ICs |
| PPPSM | 1000 W - peak pulse power dissipation capability under standardized transient waveform |
| TJ max | +175 °C - maximum allowable junction temperature, supporting high-reliability industrial use |
| Package | DO-214AA (SMB) - surface-mount package with matte tin-plated leads, J-STD-002 solderable |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual-leaded, gull-wing surface-mount configuration; weight ≈ 0.110 g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse-biased protection terminal | Connected to protected line (e.g., DC input rail); marked by band; conducts during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Enables effective suppression of nanosecond-scale ESD events before logic or power devices are damaged |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load dump and supply transients without external filtering |
| Moisture sensitivity level 1 | Permits unlimited floor life and standard SMT reflow without baking preconditioning |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Protection of primary-side rectifier output and secondary-side DC bus against line surges and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor or input rectifier to clamp transient energy before reaching controller ICs. Use Value: Limits voltage excursion to ≤137 V during 1000 W pulses, preventing MOSFET gate oxide rupture and PWM controller latch-up. | Use Scenario: Input-stage overvoltage protection in wall-mounted AC-DC adapters used in consumer electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between live/neutral and ground to absorb differential-mode surges per IEC 61000-4-5. Use Value: Withstands 8.3 ms half-sine surge up to 100 A while maintaining <1 µA leakage at 85.5 V, ensuring no standby power penalty. |
| Industrial Monitors | Point-of-Sale (POS) Terminals |
Use Scenario: DC input rail protection in 24 V-powered industrial monitors exposed to field wiring transients. IC Role / Device Role / Timing Role: Unidirectional TVS installed at power entry connector to shunt induced spikes from relay switching or motor drives. Use Value: Clamps 10/1000 µs transients to 137 V within <1 ps, preserving display controller integrity and avoiding firmware resets. | Use Scenario: 12 V or 24 V DC input protection in retail POS terminals subject to hot-plug and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage guard on main power rail, coordinated with upstream fuse and downstream LDOs. Use Value: Delivers 1000 W peak power handling in SMB footprint, eliminating need for larger DO-214AB or discrete MOV+TVS stacks. |
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 (ON Semiconductor) | Same DO-214AA package; VBR = 111–123 V; VC = 162 V @ 6.2 A; PPPM = 600 W | Lower peak power rating and higher clamping voltage reduce margin in high-energy load-dump scenarios | Select 1KSMB100A when ≥1000 W pulse handling and ≤137 V clamping are required at 7.3 A |
| P6SMB100A (Littelfuse) | Same DO-214AA package; VBR = 105–116 V; VC = 158 V @ 6.3 A; PPPM = 600 W | Higher VBR min and clamping voltage limit use in 85–100 V nominal systems with tight voltage margins | Choose 1KSMB100A for tighter VBR (95–105 V) and superior clamping (137 V) in 100 V-class rails |
Compared with SMBJ100A and P6SMB100A, the 1KSMB100A offers higher peak pulse power (1000 W vs. 600 W), lower clamping voltage (137 V vs. ≥158 V), and tighter VBR tolerance-making it preferable for robust 100 V DC bus protection where transient energy and voltage margin are critical.
Availability
1KSMB100A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and industrial monitor designs requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for 1KSMB100A 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 components.
The 1KSMB series is part of TSC's transient voltage suppressor portfolio, engineered for high-reliability industrial and automotive-grade surge protection with emphasis on ISO 7637-2 compliance, moisture resilience, and automated assembly compatibility.
FAQ
What is the polarity configuration of the 1KSMB100A?
The 1KSMB100A is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only during reverse overvoltage events and blocks forward current like a standard rectifier. This configuration is confirmed in the "Devices for Bipolar Applications" note specifying CA suffix for bidirectional variants-1KSMB100A lacks the CA suffix and is therefore unidirectional.
Does the 1KSMB100A meet automotive transient standards?
Yes, the 1KSMB100A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements as explicitly stated in its features list. These pulses simulate battery disconnect, load dump, and capacitive coupling transients in 12 V and 24 V vehicle electrical systems, confirming suitability for automotive front-end protection when used with appropriate layout and grounding.
What is the maximum clamping voltage of the 1KSMB100A and at what current is it specified?
The maximum clamping voltage of the 1KSMB100A is 137 V, measured at a peak impulse current (IPP) of 7.3 A under the standardized 10/1000 µs waveform. This value is listed in the Electrical Specifications table for device 1KSMB100A and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 1KSMB100A compatible with lead-free reflow processes?
Yes, the 1KSMB100A has matte tin-plated leads compliant with J-STD-002 for solderability and is rated for moisture sensitivity level 1 per J-STD-020, meaning it can be subjected to standard lead-free reflow profiles (e.g., JEDEC J-STD-020 Class 3 peak of 260 °C) without baking or special handling.
How does the 1KSMB100A differ from the 1KSMB100CA variant?
The 1KSMB100CA is the bidirectional version of the same platform, indicated by the "CA" suffix. While both share identical VBR (95–105 V), VWM (85.5 V), and PPPSM (1000 W) ratings, the 1KSMB100CA conducts symmetrically in both directions and has no polarity marking-making it suitable for AC line or data-line protection where voltage polarity reverses. The 1KSMB100A is strictly unidirectional.
1KSMB100A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB100A FAQ
1.How can I place an order for 1KSMB100A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB100A 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 1KSMB100A reliable?
The price and inventory of 1KSMB100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB100A is usually 5 days.
3.What payment methods are accepted for 1KSMB100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB100A?
1KSMB100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB100A 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 1KSMB100A?
For technical support, including 1KSMB100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB100A requirements.
6.How does Aetrix verify that 1KSMB100A is sourced from the original manufacturer or authorized distributors?
All 1KSMB100A 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 1KSMB100A meets industry standards.
7.What is the process for return or replacement of 1KSMB100A?
All 1KSMB100A units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB100A, 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 1KSMB100A part is unused and in its original packaging.
Return procedure for 1KSMB100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB100A Tags
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