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Taiwan Semiconductor Corporation 1KSMB56CA
- Part No.:
- 1KSMB56CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB56CA.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,078
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Product details
Overview
1KSMB56CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 53.2–58.8 V at 1 mA, stand-off voltage 47.8 V, maximum clamping voltage 77.0 V at 13.0 A peak pulse current, and operating junction temperature range of –55 °C to +175 °C. It protects DC power rails in switching mode power supplies against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB56CA datasheet, 1KSMB56CA pinout, 1KSMB56CA application, or 1KSMB56CA equivalent, key selection criteria include bi-directional clamping capability, 1000 W peak pulse power rating, 77.0 V clamping voltage at 13.0 A, DO-214AA mechanical compatibility, and compliance with automotive transient immunity standards.
Technical Context
The 1KSMB56CA uses a glass-passivated silicon junction optimized for fast transient response (<1.0 ps rise time from 0 V to VBR(min)) and robust clamping under repetitive or single-event surges. Its bi-directional configuration enables symmetric protection of AC-coupled or floating signal lines without polarity sensitivity.
Thermal performance is defined by RθJL = 20 °C/W and RθJA = 100 °C/W, supporting operation up to 175 °C junction temperature. It 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) | 53.2 V / 58.8 V at 1 mA - defines guaranteed conduction onset under reverse/forward surge |
| VWM | 47.8 V - maximum continuous working voltage before leakage exceeds 1 µA |
| VC@IPP | 77.0 V at 13.0 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPSM | 1000 W - peak pulse power handling per single 10/1000 µs waveform |
| TJ Range | –55 °C to +175 °C - supports under-hood and industrial ambient environments |
| Package | DO-214AA (SMB) - surface-mount footprint compatible with automated placement and IPC-7351B land patterns |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not applicable for bi-directional 1KSMB56CA), weight ≈ 0.110 g, UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient terminal | No polarity marking required; either end connects to protected line, other to ground or reference |
| Case | Non-electrical mechanical body | Provides thermal path to PCB copper and mechanical mounting; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0 ps from 0 V to VBR(min), ensuring clamping activation before sensitive ICs experience overvoltage |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Automotive Infotainment Power Rails | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 48 V DC input rails in head-unit power modules exposed to battery dump and alternator transients. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed between input rail and chassis ground to limit surge energy entering DC-DC converters. Use Value: 77.0 V clamping voltage ensures downstream 65 V-rated MOSFETs and controllers remain within safe operating area during ISO 7637-2 Pulse 2b events. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller backplanes against field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-connected TVS across each channel-to-ground path to shunt transients before reaching optocoupler inputs. Use Value: 1000 W peak power rating absorbs multiple 1 kV/500 A transients per IEC 61000-4-5 without degradation, extending maintenance intervals. |
| AC-DC Adapter Secondary Side | Medical Imaging Equipment Signal Lines |
Use Scenario: Clamping output rectifier node in 12 V/5 A flyback adapters subjected to line-induced surges and load-dump coupling. IC Role / Device Role / Timing Role: Bi-directional TVS placed across secondary-side bulk capacitor to suppress ringing and cross-regulation spikes. Use Value: 47.8 V stand-off voltage allows normal 12 V output regulation while clamping >53.2 V excursions, preventing secondary-side controller latch-up. | Use Scenario: Protecting LVDS video data links between CT scanner detector modules and acquisition boards from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS mounted directly at connector interface to minimize stub length and preserve signal integrity. Use Value: Symmetric clamping preserves differential common-mode margin and avoids skew between complementary signals during ±8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA (ON Semiconductor) | Same DO-214AA package; VBR = 62.2–68.8 V, VC = 93.6 V @ 10.7 A - higher clamping voltage, lower peak current rating | Less effective for 48 V systems requiring sub-80 V clamping; better suited for 60 V nominal rails | Select when system max operating voltage exceeds 50 V and layout allows higher clamping margin |
| P6SMB56CA (Littelfuse) | Identical VBR (53.2–58.8 V), same DO-214AA package; VC = 77.0 V @ 13.0 A - functionally matched clamping performance | Direct drop-in replacement with identical electrical behavior and qualification history | Preferred for dual-sourcing where P6SMB56CA is already qualified in production |
Compared with SMBJ56CA and P6SMB56CA, the 1KSMB56CA delivers identical clamping performance to P6SMB56CA but offers tighter VBR tolerance than SMBJ56CA, making it optimal for 48 V automotive and industrial systems where precise voltage threshold control is critical.
Availability
1KSMB56CA is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial PLC digital I/O protection, and AC-DC adapter secondary-side surge suppression requiring stable component supply and full traceability.
Supply support for 1KSMB56CA 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 1KSMB56CA belongs to TSC's 1KSMBxxCA bi-directional TVS family, engineered specifically for high-reliability automotive and industrial transient suppression where ISO 7637-2 compliance and 175 °C operation are mandatory.
FAQ
What is the breakdown voltage range of the 1KSMB56CA?
The 1KSMB56CA has a guaranteed breakdown voltage range of 53.2 V to 58.8 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable conduction onset across production lots and temperature extremes, and is verified during 100% production testing. The 1KSMB56CA maintains this specification across its full operating junction temperature range of –55 °C to +175 °C.
Is the 1KSMB56CA unidirectional or bidirectional?
The 1KSMB56CA is a bi-directional TVS diode, indicated by the "CA" suffix in its part number. It provides symmetrical clamping for both positive and negative transients without polarity dependence, eliminating the need for orientation during placement. This makes the 1KSMB56CA ideal for protecting AC-coupled interfaces, floating grounds, and differential signal lines where voltage polarity reversal may occur.
What is the maximum clamping voltage of the 1KSMB56CA at rated peak current?
The 1KSMB56CA has a maximum clamping voltage of 77.0 V at 13.0 A peak pulse current (10/1000 µs waveform). This value represents the upper limit of voltage seen by downstream circuitry during worst-case surge events. The 1KSMB56CA achieves this clamping performance while maintaining low leakage (<1 µA at 47.8 V) in normal operation, ensuring minimal standby power impact.
Does the 1KSMB56CA meet automotive transient immunity standards?
Yes, the 1KSMB56CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, covering typical automotive electrical disturbances including load dump, alternator switching, and inductive load switching. Its 1000 W peak pulse power rating and fast <1.0 ps response ensure robust protection in 12 V and 48 V vehicle networks, and the 1KSMB56CA is rated for junction temperatures up to +175 °C to withstand under-hood conditions.
What package type does the 1KSMB56CA use, and is it compatible with automated assembly?
The 1KSMB56CA uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads that comply with J-STD-002 solderability requirements. It is fully compatible with automated pick-and-place equipment and standard reflow profiles, including lead-free processes. The 1KSMB56CA also meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, allowing floor-life unlimited storage and single-reflow processing without baking.
1KSMB56CA 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
1KSMB56CA FAQ
1.How can I place an order for 1KSMB56CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB56CA 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 1KSMB56CA reliable?
The price and inventory of 1KSMB56CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB56CA is usually 5 days.
3.What payment methods are accepted for 1KSMB56CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB56CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB56CA?
1KSMB56CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB56CA 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 1KSMB56CA?
For technical support, including 1KSMB56CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB56CA requirements.
6.How does Aetrix verify that 1KSMB56CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB56CA 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 1KSMB56CA meets industry standards.
7.What is the process for return or replacement of 1KSMB56CA?
All 1KSMB56CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB56CA, 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 1KSMB56CA part is unused and in its original packaging.
Return procedure for 1KSMB56CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB56CA Tags
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