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Taiwan Semiconductor Corporation SMDJ43CA
- Part No.:
- SMDJ43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ43CA.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,226
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Product details
Overview
SMDJ43CA from Taiwan Semiconductor is a bidirectional 43V transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000W peak pulse power, 69.4V clamping voltage at 43.2A peak current, and -55°C to +175°C operating junction temperature. It protects telecom and industrial circuits against ESD, lightning surges, and load-switch transients.
For engineers reviewing the SMDJ43CA datasheet, SMDJ43CA pinout, SMDJ43CA application, or SMDJ43CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, 1µA max reverse leakage at 43V, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
SMDJ43CA employs a glass-passivated silicon junction optimized for fast transient suppression in automotive and industrial environments. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity concerns.
The device meets ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b, with a 10/1000µs waveform-defined clamping profile and thermal resistance of 15°C/W (junction-to-lead), supporting high-reliability surge immunity in constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins |
| VBR min / max | 47.8 V / 52.8 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 69.4 V - Clamped voltage across terminals at 43.2 A peak impulse current, limiting downstream stress |
| PPK | 3000 W - Peak pulse power handling per 1 ms non-repetitive surge, per Fig.5 waveform |
| IR @ VWM | 1 µA - Reverse leakage at rated stand-off voltage, ensuring minimal standby power loss |
| TJ max | +175 °C - Maximum junction temperature enabling operation in under-hood or high-ambient industrial enclosures |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical construction). Matte tin-plated leads, UL 94V-0 molding compound, JESD201 Class 2 whisker resistant, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Identical terminal behavior in both directions; no polarity marking required for SMDJ43CA |
| Case (cathode band absent) | Thermal conduction path | DO-214AB body provides primary heat dissipation to PCB copper; no dedicated thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable breakdown voltage and long-term reliability under repeated surge stress |
| Sub-1 ps response time | Clamps transients before sensitive ICs experience overvoltage damage |
| ISO 7637-2 compliance | Validated protection against automotive electrical disturbances including load dump and inductive switching |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling |
Applications
| Automotive Infotainment Power Rails | Industrial Ethernet PHY Protection |
|---|---|
Use Scenario: Protecting 12V supply inputs of head unit MCUs from alternator load dump and battery disconnect spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed upstream of DC/DC converter input to clamp ±100V transients. Use Value: Limits voltage to ≤69.4V during 3000W surges, preventing regulator latch-up and MCU brownout. | Use Scenario: Safeguarding RJ45 magnetics and PHY transceivers against ESD and induced surges on PoE data lines. IC Role / Device Role / Timing Role: Common-mode TVS across differential pairs to suppress common-mode transients without distorting signal integrity. Use Value: Sub-1ps response preserves 100BASE-TX timing margins while meeting IEC 61000-4-2 Level 4 (±15 kV air). |
| Telecom DSL Line Card Surge Protection | PLC Analog Input Module Transient Immunity |
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced surges entering via twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional clamping device bridging tip/ring to ground, absorbing longitudinal mode energy. Use Value: 3000W rating handles 10/1000µs lightning surges per ITU-T K.20/21, maintaining line card uptime. | Use Scenario: Protecting 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-leakage (1 µA) TVS across input terminals to avoid disturbing precision analog measurement. Use Value: 43V VWM matches typical loop supply rails; 69.4V VC ensures ADC front-end stays within safe input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43CA | Same 43V VWM and bidirectional configuration, but lower 1500W PPK rating and higher 77V VC at rated current | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy ESD-only scenarios | Select SMDJ43CA when 3000W surge immunity is required; SAC43CA only where space or cost constraints outweigh power-handling needs |
| SMCJ43CA | Identical electrical specs and DO-214AB package; manufactured by Vishay with same VWM/VBR/VC/PPK ratings | No functional or layout difference; qualified for identical automotive and industrial standards | SMCJ43CA is a second-source option with identical performance-choose based on supply chain availability and qualification history |
Compared with SAC43CA, SMDJ43CA delivers 100% higher peak power handling and tighter clamping, making it essential for automotive-grade surge protection; versus SMCJ43CA, it offers equivalent performance with Taiwan Semiconductor's qualification pedigree and traceable sourcing.
Availability
SMDJ43CA is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial Ethernet equipment, and telecom line cards requiring stable component supply across extended production lifecycles.
Supply support for SMDJ43CA 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 for industrial and automotive markets.
SMDJ43CA belongs to TSC's SMDJ series of high-power surface-mount TVS diodes, engineered specifically for robust transient immunity in harsh environments where ISO 7637-2 and IEC 61000-4-5 compliance are mandatory.
FAQ
What is the clamping voltage of SMDJ43CA at its rated peak pulse current?
SMDJ43CA has a maximum clamping voltage (VC) of 69.4 V at 43.2 A peak pulse current (IPPM), measured under the 10/1000 µs waveform defined in IEC 61000-4-5. This value ensures downstream components see no more than 69.4 V during a full-rated 3000 W transient event. The clamping performance is guaranteed across the -55°C to +175°C junction temperature range, and SMDJ43CA maintains this specification in bidirectional operation.
Is SMDJ43CA unidirectional or bidirectional, and how is polarity marked?
SMDJ43CA is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions-no cathode band or polarity marking is present. This distinguishes it from the unidirectional SMDJ43A variant, which carries a cathode band. The CA suffix explicitly denotes bidirectional configuration per Taiwan Semiconductor's ordering convention, and SMDJ43CA's electrical characteristics apply identically in either direction.
Does SMDJ43CA meet automotive transient immunity standards?
Yes, SMDJ43CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, covering key automotive electrical disturbances including inductive switch-off, battery connection/disconnection, and capacitive coupling events. Its 3000 W peak power rating, fast <1 ps response, and DO-214AB thermal performance make SMDJ43CA suitable for front-end protection in automotive ECUs, infotainment modules, and body control units where compliance with OEM-level surge testing is mandatory.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for SMDJ43CA?
SMDJ43CA is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and subjected to standard lead-free reflow profiles (e.g., JEDEC J-STD-020 Rev G peak of 260°C) without baking or special handling. Its matte tin-plated leads comply with J-STD-002 for solderability, and the UL 94V-0 molding compound ensures flame resistance during assembly. These attributes make SMDJ43CA compatible with high-volume automated SMT lines.
How does SMDJ43CA compare to SMDJ43A in terms of electrical performance and application use?
SMDJ43CA and SMDJ43A share identical VWM (43 V), VBR (47.8–52.8 V), and PPK (3000 W), but differ fundamentally in directionality: SMDJ43A is unidirectional with a cathode band, while SMDJ43CA is bidirectional with no polarity marking. SMDJ43CA is used where AC signals, floating grounds, or dual-polarity transients exist (e.g., telecom lines, RS-485), whereas SMDJ43A suits DC rails with defined polarity. Both require the same PCB footprint (DO-214AB), but SMDJ43CA eliminates orientation verification during placement.
SMDJ43CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ43CA FAQ
1.How can I place an order for SMDJ43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ43CA 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 SMDJ43CA reliable?
The price and inventory of SMDJ43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ43CA is usually 5 days.
3.What payment methods are accepted for SMDJ43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ43CA?
SMDJ43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ43CA 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 SMDJ43CA?
For technical support, including SMDJ43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ43CA requirements.
6.How does Aetrix verify that SMDJ43CA is sourced from the original manufacturer or authorized distributors?
All SMDJ43CA 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 SMDJ43CA meets industry standards.
7.What is the process for return or replacement of SMDJ43CA?
All SMDJ43CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ43CA, 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 SMDJ43CA part is unused and in its original packaging.
Return procedure for SMDJ43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ43CA Tags
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