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Taiwan Semiconductor Corporation 1KSMB15CA
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- Part No.:
- 1KSMB15CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB15CA.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
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Product details
Overview
1KSMB15CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 14.3–15.8 V at 1 mA, stand-off voltage 12.8 V, maximum clamping voltage 21.2 V at 47.2 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 consumer displays against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB15CA datasheet, 1KSMB15CA pinout, 1KSMB15CA application, or 1KSMB15CA equivalent, key selection criteria include bi-directional clamping capability, 1000 W peak pulse power rating, DO-214AA surface-mount compatibility, moisture sensitivity level 1, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.
Technical Context
The 1KSMB15CA is a single-die, bi-directional TVS diode designed for unidirectional and bidirectional surge suppression in low-voltage DC systems. Its glass-passivated junction ensures stable breakdown behavior, while sub-1 ps response time enables effective clamping of fast-rising ESD and load-dump transients.
It meets ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b for automotive electronics and operates within a junction temperature range of −55 °C to +175 °C. Thermal resistance is 20 °C/W (junction-to-lead) and 100 °C/W (junction-to-ambient), supporting reliable power dissipation in compact SMB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 14.3 V / 15.8 V at 1 mA - defines minimum and maximum voltage at which device enters avalanche conduction under standardized test conditions |
| VWM | 12.8 V - maximum continuous reverse working voltage before leakage exceeds 5 µA; sets safe DC operating ceiling |
| VC @ IPP | 21.2 V at 47.2 A - clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected circuit |
| PPPSM | 1000 W - peak pulse power handling per 10/1000 µs waveform; defines transient energy absorption capacity |
| TJ max | +175 °C - maximum allowable junction temperature; enables operation in high-ambient industrial or under-hood environments |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 0.110 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bi-directional 1KSMB15CA; terminals are symmetrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | Either terminal serves as input/output for transient current; no polarity dependency in layout |
| Case (body) | Thermal and mechanical interface | Provides primary heat path to PCB copper; requires adequate thermal pad area per JEDEC MS-012 |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under repeated surge stress |
| Response time < 1.0 ps | Clamps transients before downstream ICs experience damaging overvoltage, critical for high-speed data lines and microcontroller I/O |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching immunity testing without external filtering |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or dry-pack requirements, reducing manufacturing overhead |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display Monitor |
|---|---|
Use Scenario: Input rectifier stage of 12 V DC-DC converter subjected to line-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Bi-directional clamping element placed across bulk capacitor to limit voltage excursions during 10/1000 µs load dump events. Use Value: Limits peak rail voltage to ≤21.2 V, preventing overvoltage failure of PWM controller and MOSFET gate oxide. | Use Scenario: DC power input of LCD monitor exposed to ESD and cable discharge events during field service. IC Role / Device Role / Timing Role: Primary surge protection device on 12 V supply line upstream of DC-DC regulators and display timing controllers. Use Value: Absorbs up to 1000 W transient energy while maintaining clamped voltage below 21.2 V, protecting sensitive LVDS and TCON ICs. |
| Automotive Body Control Module | USB-C Power Delivery Adapter |
Use Scenario: 12 V battery-supplied BCM subjected to ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3b (capacitive coupling). IC Role / Device Role / Timing Role: Bidirectional TVS placed at main power entry point to clamp both positive and negative transients. Use Value: Withstands 47.2 A peak impulse current and maintains clamping voltage ≤21.2 V, ensuring MCU and CAN transceiver survival. | Use Scenario: Secondary-side 15 V output rail of GaN-based USB PD adapter experiencing fast transient coupling from primary-side switching noise. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS suppressing high-frequency ringing and ESD on regulated output bus. Use Value: Sub-1 ps response captures nanosecond-scale spikes; DO-214AA footprint allows placement adjacent to connector without trace inductance penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same DO-214AA package, identical VBR (14.3–15.8 V), but rated for 600 W PPPM vs. 1000 W | Lower peak power handling limits use in high-energy automotive load-dump scenarios | Select 1KSMB15CA where full 1000 W surge margin is required per ISO 7637-2 Pulse 2b |
| 1.5KE15CA | Through-hole DO-201 package, same VBR, 1000 W rating, but higher RθJA (75 °C/W) and larger footprint | Not suitable for high-density SMT designs; requires manual soldering or wave process | Choose 1KSMB15CA when automated placement, space constraints, or thermal performance in compact layouts are priorities |
Compared with SMBJ15CA and 1.5KE15CA, the 1KSMB15CA delivers equal voltage performance with superior 1000 W surge capacity in a smaller, moisture-insensitive SMB package-enabling robust, high-volume SMT deployment in space-constrained automotive and consumer power systems.
Availability
1KSMB15CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer display monitors, and automotive body control modules requiring stable component supply, ISO 7637-2 compliance, and high-reliability transient suppression.
Supply support for 1KSMB15CA 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 1KSMBxxCA series is part of TSC's high-power surface-mount TVS platform, engineered specifically for automotive, industrial, and consumer power rail protection where bi-directional clamping, fast response, and moisture-insensitive packaging are mandatory.
FAQ
What is the breakdown voltage range of the 1KSMB15CA?
The 1KSMB15CA has a guaranteed breakdown voltage range of 14.3 V to 15.8 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots while maintaining compatibility with 12 V nominal systems.
Is the 1KSMB15CA suitable for automotive applications?
Yes, the 1KSMB15CA is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive power net protection. Its −55 °C to +175 °C junction temperature range, moisture sensitivity level 1, and DO-214AA package meet key AEC-Q200 stress test prerequisites for under-hood and body electronics.
How does the 1KSMB15CA differ from unidirectional variants like 1KSMB15A?
The 1KSMB15CA is bi-directional, enabling symmetric clamping of both positive and negative transients without polarity concerns, whereas 1KSMB15A is unidirectional and requires correct anode/cathode orientation. The 1KSMB15CA replaces two unidirectional devices in AC-coupled or floating-rail applications, simplifying layout and reducing BOM count.
What is the maximum clamping voltage of the 1KSMB15CA during a surge event?
The 1KSMB15CA exhibits a maximum clamping voltage of 21.2 V when subjected to its rated peak pulse current of 47.2 A under the standard 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient conditions and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does the 1KSMB15CA require special PCB layout considerations?
Yes - to preserve its <1 ps response, minimize trace inductance between the 1KSMB15CA and protected node. Use short, wide traces, place directly across the power rail, and connect both terminals to large copper planes. Avoid vias in the surge path; thermal relief on pads should be minimized to maintain low-inductance grounding and heat dissipation.
1KSMB15CA 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 47.2A
- 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)
1KSMB15CA FAQ
1.How can I place an order for 1KSMB15CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB15CA 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 1KSMB15CA reliable?
The price and inventory of 1KSMB15CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB15CA is usually 5 days.
3.What payment methods are accepted for 1KSMB15CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB15CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB15CA?
1KSMB15CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB15CA 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 1KSMB15CA?
For technical support, including 1KSMB15CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB15CA requirements.
6.How does Aetrix verify that 1KSMB15CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB15CA 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 1KSMB15CA meets industry standards.
7.What is the process for return or replacement of 1KSMB15CA?
All 1KSMB15CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB15CA, 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 1KSMB15CA part is unused and in its original packaging.
Return procedure for 1KSMB15CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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