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Taiwan Semiconductor Corporation 1KSMB16CA
- Part No.:
- 1KSMB16CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB16CA.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,313
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Product details
Overview
1KSMB16CA from Taiwan Semiconductor is a bidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 15.2–16.8 V at 1.0 mA test current, stand-off voltage 13.6 V, maximum clamping voltage 22.5 V at 44.4 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 1KSMB16CA datasheet, 1KSMB16CA pinout, 1KSMB16CA application, or 1KSMB16CA equivalent, key selection criteria include bidirectional clamping capability, 1000W peak pulse power rating, DO-214AA surface-mount compatibility, moisture sensitivity level 1, and RoHS/halogen-free compliance for high-reliability industrial and consumer power systems.
Technical Context
The 1KSMB16CA is a single-die, glass-passivated, bidirectional TVS diode optimized for fast transient suppression on unregulated or lightly filtered DC lines. Its sub-1.0 ps response time ensures clamping before downstream circuitry sustains overvoltage stress, and its 20 °C/W junction-to-lead thermal resistance supports sustained surge handling under PCB copper heatsinking.
Designed per ANSI/IEEE C62.35 and compliant with ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (supply disconnection), and Pulse 3a/3b (capacitive coupling), the device operates without polarity sensitivity-cathode band marking applies only to unidirectional variants-and delivers stable clamping across −55 °C to +175 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 15.2 V / 16.8 V @ IT = 1.0 mA - defines minimum voltage at which device enters avalanche conduction; ensures reliable turn-on above 13.6 V stand-off |
| VWM | 13.6 V - maximum continuous reverse working voltage; sets safe DC operating ceiling before leakage rises |
| VC @ IPP | 22.5 V @ 44.4 A (10/1000 µs) - clamped voltage seen by protected IC during worst-case surge; limits stress on 24 V-rated components |
| PPPSM | 1000 W - peak pulse power dissipation capability; enables survival of automotive load-dump and ESD-like events |
| Junction temp. range | −55 °C to +175 °C - supports operation in under-hood, industrial, and enclosed power supply environments |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with 0.110 g mass and UL 94V-0 molding compound |
| Mechanical polarity | Bidirectional - no cathode band required; symmetric clamping for AC-coupled or floating bus protection |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, dual-terminal, bidirectional configuration. Cathode band marking is absent-device has no polarity designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage excursions |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode; symmetrical terminals enable placement without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, low-leakage avalanche performance over lifetime and temperature cycling |
| Response time < 1.0 ps | Clamps transients before propagation into sensitive analog or digital circuitry downstream |
| ISO 7637-2 compliance | Validated for automotive-level load dump (Pulse 1), supply interruption (Pulse 2a/2b), and capacitive coupling (Pulse 3a/3b) |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow; compatible with standard SMT assembly lines |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated markets |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display Monitor |
|---|---|
Use Scenario: Input rectifier output or secondary-side DC bus subjected to line surges and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across bulk capacitor or post-regulator rail to limit transient overshoot. Use Value: Clamps 1000W pulses to ≤22.5 V, protecting 24 V-rated controllers and MOSFETs without derating margin loss. | Use Scenario: HDMI/DP interface power pins and internal 12 V/19 V bias rails exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary overvoltage protection element on DC input and auxiliary power domains. Use Value: Sub-1 ps response prevents latch-up in display timing controllers; DO-214AA footprint allows placement near connectors. |
| AC-DC Adapter | Industrial Control Panel |
Use Scenario: Secondary-side 12–24 V output rail subject to hot-plug transients and transformer ringing. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between output and ground to absorb repetitive 10/1000 µs surges. Use Value: 13.6 V VWM avoids false triggering during normal regulation; 44.4 A IPP handles multiple surge events without degradation. | Use Scenario: 24 V DC input of PLC I/O modules exposed to field wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at terminal block entry point. Use Value: 175 °C TJMAX and 20 °C/W RθJL ensure reliability in sealed enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA (Bourns) | Same DO-214AA package, 15.2–16.8 V VBR, but 600 W PPPM; higher leakage (5 µA vs. 1 µA @ VWM) | Limited to lower-energy transients; unsuitable for full ISO 7637-2 Pulse 1 compliance | Select when cost sensitivity outweighs peak power requirement and layout space permits larger footprint alternatives |
| 1.5SMC16CA (ON Semiconductor) | DO-214AB (SMC) package (larger), same VBR/VC, 1500 W rating; 1000x higher junction capacitance (~200 pF) | Not suitable for high-speed data lines due to capacitance; better for high-current, low-frequency rails | Choose when higher surge margin is needed and board space allows SMC outline; avoid near USB/HDMI interfaces |
Compared with SMBJ16CA and 1.5SMC16CA, the 1KSMB16CA uniquely balances 1000 W capability, DO-214AA compactness, 1 µA leakage, and ISO 7637-2 validation-making it optimal for space-constrained, automotive-grade, and high-reliability 24 V system protection where both size and robustness are critical.
Availability
1KSMB16CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer display monitors, and industrial control panels requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for 1KSMB16CA 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial, computing, and consumer markets.
The 1KSMBxxA/CA series was engineered specifically for high-power, surface-mount transient suppression in automotive and industrial power systems-emphasizing ISO 7637-2 compliance, thermal robustness, and automated assembly readiness.
FAQ
What is the maximum clamping voltage of the 1KSMB16CA under a 10/1000 µs surge?
The 1KSMB16CA has a maximum clamping voltage (VC) of 22.5 V when subjected to a 44.4 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 22.5 V during standardized surge events-critical for safeguarding 24 V-rated ICs and MOSFETs. The 1KSMB16CA maintains this clamping performance across its full operating temperature range.
Is the 1KSMB16CA unidirectional or bidirectional, and how is polarity identified?
The 1KSMB16CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. Unlike unidirectional variants (e.g., 1KSMB16A), it has no cathode band marking and exhibits symmetrical clamping behavior for both positive and negative transients. This eliminates orientation concerns during automated placement and simplifies design for AC-coupled or floating-bus applications where polarity is undefined.
Does the 1KSMB16CA meet automotive transient immunity standards?
Yes, the 1KSMB16CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (supply disconnection), and Pulse 3a/3b (capacitive coupling). Its 1000 W peak pulse power rating, sub-1 ps response time, and validated clamping curve ensure compliance without external circuitry. The 1KSMB16CA is routinely deployed in automotive infotainment power supplies and body-control module inputs where such immunity is mandatory.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of the 1KSMB16CA?
The 1KSMB16CA has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions and requires no baking prior to reflow soldering. It is fully compatible with standard lead-free (SnAgCu) reflow profiles up to 260 °C peak, and its matte tin-plated leads meet J-STD-002 solderability requirements-ensuring high-yield, repeatable placement in high-volume SMT lines using the 1KSMB16CA.
How does the thermal performance of the 1KSMB16CA support sustained surge handling?
The 1KSMB16CA features a junction-to-lead thermal resistance (RθJL) of 20 °C/W, enabling efficient heat transfer from the silicon die to the PCB copper via the SMB package leads. When mounted on ≥1 cm² of 2-oz copper, it can dissipate repeated 1000 W pulses without exceeding 175 °C junction temperature. This thermal design margin makes the 1KSMB16CA suitable for applications like industrial motor drives where surge recurrence is frequent and cooling is passive.
1KSMB16CA 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):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 44.4A
- 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)
1KSMB16CA FAQ
1.How can I place an order for 1KSMB16CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB16CA 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 1KSMB16CA reliable?
The price and inventory of 1KSMB16CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB16CA is usually 5 days.
3.What payment methods are accepted for 1KSMB16CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB16CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB16CA?
1KSMB16CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB16CA 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 1KSMB16CA?
For technical support, including 1KSMB16CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB16CA requirements.
6.How does Aetrix verify that 1KSMB16CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB16CA 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 1KSMB16CA meets industry standards.
7.What is the process for return or replacement of 1KSMB16CA?
All 1KSMB16CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB16CA, 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 1KSMB16CA part is unused and in its original packaging.
Return procedure for 1KSMB16CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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