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Taiwan Semiconductor Corporation 1KSMB47CA
- Part No.:
- 1KSMB47CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB47CA.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,031
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Product details
Overview
1KSMB47CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 44.7–49.4 V at 1 mA, stand-off voltage 40.2 V, maximum clamping voltage 64.8 V at 15.4 A, and operating junction temperature range −55 °C to +175 °C. It protects DC power rails and signal lines in switching mode power supplies and consumer displays against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB47CA datasheet, 1KSMB47CA pinout, 1KSMB47CA application, or 1KSMB47CA equivalent, key selection criteria include bi-directional clamping capability, 1000W peak pulse power rating, 1.0 ps response time, RoHS/halogen-free compliance, and SMB surface-mount compatibility for automated assembly.
Technical Context
The 1KSMB47CA is a glass-passivated, single-die, bi-directional TVS diode designed for unidirectional or bidirectional surge suppression without polarity dependency. Its junction-to-lead thermal resistance is 20 °C/W, enabling effective heat dissipation during transient events.
It meets ISO 7637-2 test pulses (1, 2a, 2b, 3a, 3b) and is rated for moisture sensitivity level 1 per J-STD-020. The device exhibits fast response (<1.0 ps from 0 V to VBR(min)) and low leakage (<1.0 µA at VWM), supporting robust protection in automotive and industrial power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines reliable avalanche conduction onset under surge conditions |
| VWM | 40.2 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPP | 64.8 V at 15.4 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPSM | 1000 W - peak pulse power handling for standardized 10/1000 µs waveform |
| TJ Range | −55 °C to +175 °C - enables operation in under-hood automotive or high-temp industrial environments |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with 3000 pcs/reel tape-and-reel packaging |
| Configuration | Bi-directional single die - provides symmetrical clamping for AC-coupled or floating lines without external polarity management |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, UL 94V-0 flammability rating, polarity indicated by cathode band (not applicable for bi-directional 1KSMB47CA; terminals are symmetrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | Either terminal serves as input/output for transient energy; no polarity-dependent mounting required |
| Case | Non-connected mechanical body | No internal thermal or electrical connection to die; mechanical support only |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| 1.0 ps response time | Clamps transients before sensitive downstream circuitry experiences overvoltage |
| ISO 7637-2 compliance | Validated for automotive load-dump and supply-line transient immunity testing |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling prior to assembly |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental compliance requirements for end-product certification |
Applications
| Automotive Infotainment Power Rails | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting 48 V DC input of head-unit power modules against battery line transients during cold-cranking or load dump. IC Role / Device Role / Timing Role: Bi-directional TVS clamp absorbing up to 1000 W of ISO 7637-2 Pulse 5a energy without failure. Use Value: Prevents latch-up or destruction of upstream DC/DC controllers and downstream microcontrollers during vehicle-level EMC testing. | Use Scenario: Safeguarding primary-side rectifier output in 200–500 W industrial switch-mode power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed across bulk capacitor input to limit voltage overshoot during line disturbances. Use Value: Maintains system uptime by preventing overvoltage shutdown or MOSFET avalanche failure during 10/1000 µs surges up to 15.4 A peak. |
| Consumer Display ESD Protection | Telecom DC Feeder Interface |
Use Scenario: Clamping induced transients on LVDS or eDP power rails in 4K monitors subjected to IEC 61000-4-5 surge coupling. IC Role / Device Role / Timing Role: Bi-directional standoff/clamp device mounted at board edge to shunt common-mode surges before entering display timing controller. Use Value: Enables pass/fail compliance with Class 3 (2 kV line-earth) surge immunity without adding series impedance or signal distortion. | Use Scenario: Protecting -48 V DC telecom feeder inputs in remote radio units against induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: High-power bi-directional TVS placed between feed line and DC/DC converter input to clamp differential and common-mode transients. Use Value: Delivers 64.8 V clamping at 15.4 A, keeping downstream PoE interface ICs within absolute maximum ratings during 10/1000 µs events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA (Bourns) | Same DO-214AA package, identical VBR (44.7–49.4 V), but higher VC = 77.0 V at 13.0 A and lower PPPSM = 600 W | Lower power rating limits use in high-energy automotive load-dump scenarios where 1000 W is required | Select 1KSMB47CA when full ISO 7637-2 Pulse 5a compliance is mandatory; SMBJ47CA suits cost-sensitive, lower-energy industrial designs |
| 1.5KE47CA (ON Semiconductor) | Through-hole DO-201AE package, same VBR/VC, but higher IPP = 21.4 A and PPPSM = 1500 W; not surface-mountable | Requires PCB redesign for through-hole mounting; unsuitable for high-density automated assembly | Choose 1KSMB47CA for SMT production scalability and space-constrained layouts; 1.5KE47CA only where legacy through-hole infrastructure exists |
Compared with SMBJ47CA and 1.5KE47CA, the 1KSMB47CA uniquely balances 1000 W surge capability, SMB surface-mount form factor, and bi-directional symmetry-making it optimal for next-generation automotive and industrial power interfaces requiring automated assembly and full ISO 7637-2 immunity.
Availability
1KSMB47CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive infotainment systems, and industrial DC power distribution networks requiring stable component supply and full compliance with ISO 7637-2 transient immunity standards.
Supply support for 1KSMB47CA 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-Q101 qualified product lines.
The 1KSMBxxCA series is part of TSC's high-reliability transient suppression portfolio, engineered specifically for automotive-grade surge immunity and industrial power rail protection where fast response, high power density, and bi-directional symmetry are critical.
FAQ
What is the breakdown voltage range of the 1KSMB47CA?
The 1KSMB47CA has a guaranteed breakdown voltage range of 44.7 V to 49.4 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent avalanche initiation across production lots and supports design margining for worst-case transient clamping performance in applications like automotive power modules and industrial SMPS.
Is the 1KSMB47CA suitable for automotive applications?
Yes, the 1KSMB47CA is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b testing and features moisture sensitivity level 1, glass passivation, and −55 °C to +175 °C operation-key requirements for under-hood and infotainment power rail protection. Its bi-directional symmetry and 1000 W rating make it appropriate for 12 V and 48 V automotive subsystems.
How does the 1KSMB47CA differ from unidirectional variants like 1KSMB47A?
The 1KSMB47CA is bi-directional, with symmetrical clamping behavior on both terminals, while 1KSMB47A is unidirectional and requires correct anode/cathode orientation. The CA suffix indicates dual-junction construction enabling AC or floating-line protection without polarity concerns-critical for LVDS, RS-485, or telecom DC feeder applications where signal inversion or ground shift may occur.
What is the maximum clamping voltage of the 1KSMB47CA at rated surge current?
The 1KSMB47CA clamps to a maximum of 64.8 V at 15.4 A peak pulse current (10/1000 µs waveform). This value is measured under standardized conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events, directly informing downstream component voltage derating requirements.
Does the 1KSMB47CA require special PCB layout considerations?
No special layout is needed beyond standard SMB footprint adherence: short, low-inductance traces to minimize voltage overshoot during clamping, and adequate copper pour for thermal relief. The device has no polarity marking for bi-directional use, and its 20 °C/W junction-to-lead thermal resistance supports direct pad-to-thermal-via routing without additional heatsinking in most applications.
1KSMB47CA 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
1KSMB47CA FAQ
1.How can I place an order for 1KSMB47CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB47CA 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 1KSMB47CA reliable?
The price and inventory of 1KSMB47CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB47CA is usually 5 days.
3.What payment methods are accepted for 1KSMB47CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB47CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB47CA?
1KSMB47CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB47CA 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 1KSMB47CA?
For technical support, including 1KSMB47CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB47CA requirements.
6.How does Aetrix verify that 1KSMB47CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB47CA 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 1KSMB47CA meets industry standards.
7.What is the process for return or replacement of 1KSMB47CA?
All 1KSMB47CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB47CA, 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 1KSMB47CA part is unused and in its original packaging.
Return procedure for 1KSMB47CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB47CA Tags
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