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Taiwan Semiconductor Corporation 1KSMB13A
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- Part No.:
- 1KSMB13A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB13A.pdf
- Description:
- TVS DIODE 11.1VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,219
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Product details
Overview
1KSMB13A from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 12.4–13.7 V at 1.0 mA, stand-off voltage 11.1 V, maximum clamping voltage 18.2 V at 54.9 A, and 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 1KSMB13A datasheet, 1KSMB13A pinout, 1KSMB13A application, or 1KSMB13A equivalent, key selection criteria include unidirectional polarity, 1000W peak pulse power rating, 18.2 V clamping voltage at 54.9 A, DO-214AA mechanical compatibility, and compliance with J-STD-020 moisture sensitivity level 1.
Technical Context
The 1KSMB13A operates as a silicon avalanche diode optimized for fast transient suppression on low-voltage DC lines. Its glass-passivated junction enables sub-1.0 ps response time from 0 V to VBR(min), and its unidirectional configuration provides forward conduction capability up to 100 A surge current (IFSM) with VF ≤ 3.5 V at 50 A.
Thermally, it features RθJL = 20°C/W and RθJA = 100°C/W, supporting surface-mount placement in high-reliability industrial power stages. It meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.4 V / 13.7 V at 1.0 mA - defines minimum voltage at which avalanche conduction begins reliably |
| VWM | 11.1 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC@IPP | 18.2 V at 54.9 A - clamped voltage during 10/1000 µs transient, limiting downstream IC stress |
| PPPPM | 1000 W - peak pulse power handling per ISO 7637-2 Pulse 3b, enabling robust automotive-grade protection |
| TJ Range | −55°C to +175°C - supports operation in under-hood or industrial ambient environments |
| Package | DO-214AA (SMB) - standard 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; dual-leaded, single-die unidirectional construction; lead finish meets J-STD-002 solderability; polarity marked by cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to protected line's lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode | Avalanche conduction terminal | Connects to protected line's higher-potential side (e.g., VIN or rail); marked by band; conducts during reverse overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Sub-1.0 ps response time | Enables clamping before sensitive downstream logic or power MOSFETs experience voltage overshoot |
| ISO 7637-2 compliance | Validated for automotive load dump and inductive switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| J-STD-020 Level 1 MSL | Allows unlimited floor life and reflow without baking, simplifying SMT manufacturing flow |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Input rectifier stage subjected to line surges and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor input to clamp differential-mode transients. Use Value: Limits peak voltage to 18.2 V during 54.9 A 10/1000 µs pulses, protecting bridge rectifier and primary-side controller. | Use Scenario: Secondary-side 12 V DC output exposed to load-dump coupling and hot-plug events. IC Role / Device Role / Timing Role: TVS connected between output rail and ground to absorb reverse-energy transients. Use Value: Clamps output to ≤18.2 V within <1 ps, preventing overvoltage damage to USB-PD controllers or linear regulators. |
| Television Power Board | Monitor DC Input Stage |
Use Scenario: Main 24 V or 48 V power rail feeding backlight inverters and logic boards. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 11.1 V) used on auxiliary 12 V bias supply derived from main rail. Use Value: Maintains system uptime by suppressing repetitive 1000 W transients without thermal runaway (TJ up to +175°C). | Use Scenario: External 19 V DC input connector subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: First-line protection device mounted adjacent to input jack, shunting surge energy to chassis ground. Use Value: Achieves <5 µA leakage at 11.1 V, minimizing standby power loss while delivering 1000 W pulse immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A (ON Semiconductor) | VBR = 14.4–15.9 V; VC = 21.5 V @ 46.5 A; same DO-214AA package | Higher clamping voltage reduces margin for 12 V systems with tight overvoltage limits | Select when higher VBR tolerance is acceptable and legacy ON design reuse is required |
| P6SMB13A (Littelfuse) | VBR = 14.4–15.9 V; VC = 21.5 V @ 46.5 A; identical footprint and JEDEC-compliant marking | Same clamping penalty as SMBJ13A; slightly higher RθJA (110°C/W vs. 100°C/W) | Prefer for Littelfuse-qualified BOMs where second-source validation is mandated |
Compared with SMBJ13A and P6SMB13A, the 1KSMB13A offers lower VBR (12.4–13.7 V) and tighter clamping (18.2 V), making it better suited for 12 V nominal systems requiring minimal voltage headroom during surge events-without sacrificing DO-214AA board compatibility or thermal performance.
Availability
1KSMB13A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1KSMB13A 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-Q200-qualified product lines.
The 1KSMB series is designed specifically for high-energy transient suppression in automotive and industrial power conversion systems, emphasizing ruggedness, fast response, and surface-mount manufacturability.
FAQ
What is the maximum clamping voltage of the 1KSMB13A under a 10/1000 µs transient?
The 1KSMB13A has a maximum clamping voltage (VC) of 18.2 V when subjected to a 10/1000 µs waveform at IPP = 54.9 A. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components in 12 V systems. The 1KSMB13A maintains this clamping performance across its full operating temperature range.
Is the 1KSMB13A suitable for bidirectional transient protection?
No, the 1KSMB13A is unidirectional only. For bidirectional protection, Taiwan Semiconductor specifies the 1KSMB13CA variant (with CA suffix), which features symmetrical breakdown in both polarities. Using the 1KSMB13A in a bidirectional configuration risks forward conduction during negative transients and inadequate protection.
What is the standoff voltage (VWM) rating for the 1KSMB13A?
The standoff voltage (VWM) for the 1KSMB13A is 11.1 V - the maximum DC or RMS voltage that can be continuously applied without exceeding 5 µA reverse leakage current. This rating ensures reliable blocking during normal 12 V system operation while allowing rapid avalanche onset during overvoltage events.
Does the 1KSMB13A meet automotive transient immunity standards?
Yes, the 1KSMB13A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling and EFT). Its 1000 W peak pulse power rating and sub-1.0 ps response time are validated for these waveforms, supporting use in automotive infotainment and body control modules.
What is the thermal resistance from junction to ambient (RθJA) for the 1KSMB13A?
The junction-to-ambient thermal resistance (RθJA) for the 1KSMB13A is 100°C/W under standard JEDEC test conditions (single device on 1-inch² FR-4 board, 2 oz copper). This value supports thermal design in compact power supplies where airflow is limited, and confirms compatibility with typical SMB pad layouts defined in TSC's suggested footprint.
1KSMB13A 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):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 54.9A
- 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)
1KSMB13A FAQ
1.How can I place an order for 1KSMB13A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB13A 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 1KSMB13A reliable?
The price and inventory of 1KSMB13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB13A is usually 5 days.
3.What payment methods are accepted for 1KSMB13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB13A?
1KSMB13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB13A 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 1KSMB13A?
For technical support, including 1KSMB13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB13A requirements.
6.How does Aetrix verify that 1KSMB13A is sourced from the original manufacturer or authorized distributors?
All 1KSMB13A 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 1KSMB13A meets industry standards.
7.What is the process for return or replacement of 1KSMB13A?
All 1KSMB13A units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB13A, 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 1KSMB13A part is unused and in its original packaging.
Return procedure for 1KSMB13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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