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Taiwan Semiconductor Corporation 1KSMB10CA
- Part No.:
- 1KSMB10CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB10CA.pdf
- Description:
- TVS DIODE 8.55VWM 14.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,763
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Product details
Overview
1KSMB10CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) in DO-214AA (SMB) package, with breakdown voltage 9.5–10.5 V at 1 mA, stand-off voltage 8.55 V, clamping voltage 14.5 V at 69 A, 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 1KSMB10CA datasheet, 1KSMB10CA pinout, 1KSMB10CA application, or 1KSMB10CA equivalent, key selection criteria include bidirectional clamping capability, 1000W peak pulse power rating, DO-214AA mechanical compatibility, low leakage (<10 µA @ VWM), and automotive-grade transient immunity per ISO 7637-2.
Technical Context
The 1KSMB10CA implements a glass-passivated silicon avalanche junction optimized for fast transient response (<1.0 ps rise time from 0 V to VBR(min)) and stable clamping under repetitive surge conditions. Its bi-directional configuration enables symmetric protection of AC-coupled or floating signal lines without polarity constraints.
Thermal performance is defined by RθJL = 20 °C/W and RθJA = 100 °C/W, supporting operation up to 175 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling standard reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 9.5 V / 10.5 V at 1 mA - defines minimum and maximum guaranteed avalanche onset across production lot |
| VWM | 8.55 V - maximum continuous reverse working voltage before significant leakage begins |
| VC @ IPP | 14.5 V at 69 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPSM | 1000 W - peak pulse power handling per single 10/1000 µs waveform, derated above 25 °C ambient |
| IPP max | 69 A - maximum non-repetitive peak current the device can safely divert without failure |
| TJ range | −55 °C to +175 °C - operational junction temperature envelope for industrial and automotive environments |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Either terminal accepts surge current; symmetrical conduction eliminates orientation dependency during placement |
| Cathode | Transient current entry (bidirectional) | Functionally identical to anode; no internal polarity-both terminals serve as interchangeable surge paths |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and stable VBR over temperature and life cycle, critical for unattended industrial systems |
| ISO 7637-2 compliance | Validated immunity to automotive load dump and inductive switching transients (Pulse 1/2a/2b/3a/3b), enabling direct use in vehicle ECUs |
| Moisture Sensitivity Level 1 | Permits unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| Halogen-free & RoHS compliant | Fulfills IEC 61249-2-21 and EU RoHS requirements for environmentally regulated end equipment |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display (TV/Monitor) |
|---|---|
Use Scenario: Input rectifier stage exposed to line surges and ESD events during hot-plug or lightning-induced coupling. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed across bulk capacitor input to limit transient overvoltage before it reaches controller IC and MOSFETs. Use Value: Clamps 10/1000 µs surges to ≤14.5 V while absorbing 1000 W, preventing latch-up or gate oxide damage in primary-side controllers. | Use Scenario: HDMI/USB interface ports subjected to human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Board-level protection element shunting ESD current away from high-speed serializer/deserializer ICs. Use Value: Sub-1 ps response ensures clamping initiates before signal-line ICs experience overstress; low capacitance preserves signal integrity up to 100 MHz. |
| Automotive Body Control Module | AC-DC Adapter Input Stage |
Use Scenario: LIN bus or sensor supply lines encountering battery reversal, jump-start spikes, and load dump pulses per ISO 7637-2. IC Role / Device Role / Timing Role: Primary overvoltage suppression on 12 V rail feeding microcontroller and CAN/LIN transceivers. Use Value: Withstands 1000 W pulses and operates reliably from −40 °C to +125 °C ambient, meeting AEC-Q101 stress test thresholds. | Use Scenario: Universal input (90–264 VAC) adapter secondary-side DC output subjected to reflected transients and inrush-related overshoot. IC Role / Device Role / Timing Role: Secondary-side clamp protecting optocoupler feedback path and synchronous rectifier driver. Use Value: 8.55 V stand-off voltage allows stable regulation at 5–12 V outputs while clamping surges to 14.5 V, avoiding regulator dropout or overvoltage shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10CA (Bourns) | Same DO-214AA package, identical VBR (9.5–10.5 V), but higher VC = 17.0 V @ 58.8 A | Lower peak current handling (58.8 A vs. 69 A); less margin in high-energy surge environments | Select when footprint compatibility is mandatory and system-level clamping margin allows +2.5 V higher VC |
| P6SMB10CA (ON Semiconductor) | VBR = 9.5–10.5 V, same package, but PPPSM = 600 W and VC = 15.0 V @ 40 A | Rated for lower energy transients; unsuitable for ISO 7637-2 Pulse 1 or 2b without derating | Prefer for cost-sensitive consumer applications where full 1000 W rating is not required |
Compared with SMBJ10CA and P6SMB10CA, the 1KSMB10CA delivers superior surge current capacity (69 A) and tighter clamping (14.5 V), making it optimal for automotive and industrial designs demanding robust ISO 7637-2 compliance without layout change.
Availability
1KSMB10CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer displays, and automotive body control modules requiring stable component supply across extended temperature ranges and high-reliability transient immunity.
Supply support for 1KSMB10CA 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, and rectifiers with global distribution and AEC-Q101 qualified product lines.
The 1KSMB series was designed specifically for high-energy transient suppression in automotive and industrial power conversion systems, emphasizing ISO 7637-2 compliance, thermal robustness, and automated assembly compatibility.
FAQ
What is the clamping voltage of the 1KSMB10CA under a 10/1000 µs surge?
The 1KSMB10CA has a maximum clamping voltage (VC) of 14.5 V when subjected to a 10/1000 µs waveform with peak current IPP = 69 A. This value is measured per ANSI/IEEE C62.35 and guarantees consistent overvoltage limiting across production units at TA = 25 °C.
Is the 1KSMB10CA unidirectional or bidirectional?
The 1KSMB10CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It provides symmetrical clamping for both positive and negative transients without polarity sensitivity, unlike the "A"-suffixed unidirectional variants.
Does the 1KSMB10CA meet automotive transient standards?
Yes, the 1KSMB10CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, as explicitly stated in its official datasheet. Its 1000 W peak pulse rating and thermal design support sustained operation in automotive body control and infotainment modules.
What is the moisture sensitivity level (MSL) of the 1KSMB10CA?
The 1KSMB10CA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be processed using standard reflow profiles without pre-baking. This simplifies SMT line integration and reduces handling risk in high-volume manufacturing.
Can the 1KSMB10CA replace the P6SMB10CA in existing designs?
The 1KSMB10CA offers higher surge capability (1000 W vs. 600 W) and lower clamping voltage (14.5 V vs. 15.0 V), but shares the same DO-214AA package and VBR range. It can serve as a performance upgrade in designs where enhanced transient immunity is needed, though validation of thermal margin under repeated surges is recommended.
1KSMB10CA 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):
- 8.55V
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 69A
- 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)
1KSMB10CA FAQ
1.How can I place an order for 1KSMB10CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB10CA 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 1KSMB10CA reliable?
The price and inventory of 1KSMB10CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB10CA is usually 5 days.
3.What payment methods are accepted for 1KSMB10CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB10CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB10CA?
1KSMB10CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB10CA 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 1KSMB10CA?
For technical support, including 1KSMB10CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB10CA requirements.
6.How does Aetrix verify that 1KSMB10CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB10CA 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 1KSMB10CA meets industry standards.
7.What is the process for return or replacement of 1KSMB10CA?
All 1KSMB10CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB10CA, 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 1KSMB10CA part is unused and in its original packaging.
Return procedure for 1KSMB10CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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