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Taiwan Semiconductor Corporation 1KSMB36CA
- Part No.:
- 1KSMB36CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB36CA.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
1KSMB36CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 34.2–37.8 V at 1 mA, clamping voltage 49.9 V at 20 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 1KSMB36CA datasheet, 1KSMB36CA pinout, 1KSMB36CA application, or 1KSMB36CA equivalent, key selection criteria include bidirectional clamping capability, 1000 W peak pulse power rating, DO-214AA mechanical compatibility, moisture sensitivity level 1, and compliance with RoHS and IEC 61249-2-21 halogen-free requirements.
Technical Context
The 1KSMB36CA is a glass-passivated, single-die, bi-directional TVS diode designed for fast transient suppression on unidirectional or bidirectional signal/power lines. Its sub-1 ps response time ensures clamping before sensitive circuitry sustains damage, and its 20 °C/W junction-to-lead thermal resistance supports reliable power dissipation under repetitive surge conditions.
It meets ISO 7637-2 test pulses for automotive electronics and operates across −55 °C to +175 °C, with 1000 W non-repetitive peak impulse power (10/1000 µs waveform), 5 W steady-state power dissipation, and 1.0 µA max reverse leakage at 30.8 V standoff voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 34.2 V / 37.8 V at 1 mA - defines minimum and maximum voltage at which device enters avalanche conduction |
| VWM | 30.8 V - maximum continuous reverse working voltage before significant leakage begins |
| VC@IPP | 49.9 V at 20 A - clamped voltage during 10/1000 µs surge, limiting downstream voltage stress |
| PPPSM | 1000 W - peak pulse power handling capacity per single 10/1000 µs transient |
| IPP | 20.0 A - maximum non-repetitive peak current the device can safely shunt |
| TJ max | +175 °C - maximum junction temperature enabling operation in high-ambient industrial environments |
| RθJL | 20 °C/W - thermal resistance from junction to lead, critical for PCB copper pour design and surge duty cycle planning |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Weight: 0.110 g. Molding compound: UL 94V-0 rated. Terminals: matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity |
| Case (body) | Thermal path & mechanical anchor | DO-214AA body provides primary heat conduction to PCB copper; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, low-leakage avalanche performance over lifetime and temperature cycling |
| Sub-1 ps response time | Clamps transients before propagation into protected ICs, meeting stringent automotive EMC timing budgets |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or dry pack handling, reducing manufacturing overhead |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display (TV/Monitor) |
|---|---|
Use Scenario: Input rectifier stage and DC bus lines exposed to line surges and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp protecting bridge rectifiers, PFC controllers, and bulk capacitors. Use Value: Limits transient voltage to ≤49.9 V during 10/1000 µs events, preventing overvoltage failure of 65 V-rated MOSFETs and electrolytic capacitors. | Use Scenario: HDMI, USB, and power input interfaces subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary board-level transient suppressor placed at connector entry points. Use Value: Clamps ±30 V transients to <50 V within <1 ps, preserving signal integrity and avoiding latch-up in display timing controllers. |
| Automotive Body Control Module | Industrial AC-DC Adapter |
Use Scenario: 12 V battery rail in BCMs facing load dump and alternator ripple. IC Role / Device Role / Timing Role: Secondary protection stage after fuse and upstream TVS, absorbing residual energy per ISO 7637-2 Pulse 5a. Use Value: Handles 1000 W peak pulses without degradation, maintaining clamping performance over >10⁵ surge cycles at TJ ≤150 °C. | Use Scenario: Output side of universal-input adapters powering IoT gateways and smart home hubs. IC Role / Device Role / Timing Role: Final-stage overvoltage guard before LDOs and microcontrollers. Use Value: Provides 30.8 V standoff with <1.0 µA leakage at 85 °C ambient, minimizing quiescent power loss while ensuring fast clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA (Bourns) | Same DO-214AA package; VBR = 38.0–42.0 V, VC = 58.1 V @ 17.3 A - higher clamping voltage, lower IPP | Less effective clamping margin for 36 V nominal rails; requires higher layout creepage due to wider VBR tolerance | Select when legacy Bourns footprint compatibility is required and clamping voltage margin ≥12 V is acceptable |
| P6SMB36CA (ON Semiconductor) | VBR = 38.0–42.0 V, VC = 58.1 V @ 17.3 A, RθJA = 110 °C/W - slightly higher thermal resistance | Lower surge current rating reduces reliability under repeated 20 A transients at elevated ambient temperatures | Prefer for cost-sensitive consumer designs where single-event surge immunity suffices and thermal derating is managed via larger copper area |
Compared with SMBJ36CA and P6SMB36CA, the 1KSMB36CA offers tighter VBR tolerance (34.2–37.8 V vs. 38.0–42.0 V), lower clamping voltage (49.9 V vs. 58.1 V), and superior thermal performance (RθJL = 20 °C/W), making it better suited for high-reliability 36 V rail protection where voltage margin and thermal headroom are constrained.
Availability
1KSMB36CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer displays, and automotive body control modules requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1KSMB36CA 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 TVS diodes, rectifiers, and power management components.
The 1KSMBxxCA series was developed specifically for high-power, surface-mount transient suppression in automotive and industrial power systems, emphasizing robustness under ISO 7637-2 stress and compatibility with automated SMT assembly.
FAQ
What is the breakdown voltage range for the 1KSMB36CA?
The 1KSMB36CA has a guaranteed breakdown voltage range of 34.2 V to 37.8 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This tight VBR window ensures consistent clamping behavior across production lots and supports precise system-level overvoltage margining in 36 V nominal applications. The 1KSMB36CA's specification aligns with its marking code N10R and is verified per the manufacturer's I2102 datasheet revision.
Is the 1KSMB36CA unidirectional or bidirectional?
The 1KSMB36CA is a bi-directional TVS diode, indicated by the "CA" suffix per the manufacturer's ordering convention. It provides symmetrical clamping for both positive and negative transients without polarity dependence, eliminating the need for orientation during placement. This makes the 1KSMB36CA ideal for AC-coupled lines, differential buses, and floating DC rails where polarity reversal may occur. Its DO-214AA package has no cathode band marking.
What is the maximum clamping voltage of the 1KSMB36CA under surge conditions?
The 1KSMB36CA exhibits a maximum clamping voltage (VC) of 49.9 V when subjected to a 10/1000 µs waveform with a peak current (IPP) of 20.0 A. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. The 1KSMB36CA's low VC relative to its VWM (30.8 V) delivers a 62% clamping ratio, enhancing protection margin for 36 V-rated components.
Does the 1KSMB36CA meet automotive transient standards?
Yes, the 1KSMB36CA is explicitly rated to meet ISO 7637-2 for automotive applications, covering Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling noise). Its 1000 W peak pulse power rating, fast sub-1 ps response, and −55 °C to +175 °C operating range make the 1KSMB36CA suitable for under-hood and body-control module deployments. Compliance is confirmed in the official Taiwan Semiconductor I2102 datasheet.
What is the moisture sensitivity level (MSL) of the 1KSMB36CA?
The 1KSMB36CA has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/85% RH and is compatible with standard IPC/JEDEC reflow profiles without pre-baking. This eliminates special handling requirements during SMT assembly and reduces manufacturing risk. The 1KSMB36CA's MSL rating is documented in the "MECHANICAL DATA" section of the Taiwan Semiconductor datasheet (Version I2102).
1KSMB36CA 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
1KSMB36CA FAQ
1.How can I place an order for 1KSMB36CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB36CA 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 1KSMB36CA reliable?
The price and inventory of 1KSMB36CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB36CA is usually 5 days.
3.What payment methods are accepted for 1KSMB36CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB36CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB36CA?
1KSMB36CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB36CA 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 1KSMB36CA?
For technical support, including 1KSMB36CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB36CA requirements.
6.How does Aetrix verify that 1KSMB36CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB36CA 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 1KSMB36CA meets industry standards.
7.What is the process for return or replacement of 1KSMB36CA?
All 1KSMB36CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB36CA, 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 1KSMB36CA part is unused and in its original packaging.
Return procedure for 1KSMB36CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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