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Taiwan Semiconductor Corporation P4SMA43CA
- Part No.:
- P4SMA43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CA.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
P4SMA43CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 400W peak pulse power rating (10/1000μs), 36.8V working stand-off voltage (VWM), 40.9–45.2V breakdown voltage (VBR @ 1mA), and clamps transients to ≤59.3V at 7.0A peak impulse current - deployed in automotive body control modules, industrial DC/DC converters, and LED driver input stages.
For engineers reviewing the P4SMA43CA datasheet, P4SMA43CA pinout, P4SMA43CA application, or P4SMA43CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AC (SMA) package compatibility with automated SMT assembly, low leakage (<1μA @ VWM), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and junction temperature range of –55°C to +150°C.
Technical Context
The P4SMA43CA implements a glass-passivated silicon avalanche junction optimized for fast transient suppression. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, supporting unidirectional or bidirectional surge events per ANSI/IEEE C62.35.
It operates within a –55°C to +150°C junction temperature range and derates linearly above 25°C ambient per Fig.2; peak power dissipation remains 400W at TA = 25°C using the standardized 10/1000μs double-exponential waveform defined by R.E.A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - Maximum continuous reverse operating voltage before significant leakage; ensures stable operation under nominal 36V rail conditions. |
| VBR min/max | 40.9 V / 45.2 V @ 1 mA - Verified avalanche breakdown threshold; guarantees consistent turn-on across production lots and temperature. |
| VC @ IPPM | ≤59.3 V @ 7.0 A - Clamped voltage during 10/1000μs surge; limits downstream IC stress to safe levels in 48V systems. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves battery life and avoids false triggering in low-power monitoring circuits. |
| PPPM | 400 W - Peak pulse power handling capacity; sustains repetitive surges per ISO 7637-2 without degradation. |
| TJ max | +150 °C - Maximum junction temperature; supports placement near heat-generating components in enclosed industrial enclosures. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with matte tin-plated leads; compatible with J-STD-002 soldering and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; dual axial terminals; 0.060g mass; UL 94V-0 rated compound; polarity indicated by molded cathode band (bidirectional function eliminates functional polarity dependency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | Either terminal serves as anode or cathode depending on transient polarity; no PCB layout polarity constraint required. |
| Cathode band (marking) | Physical polarity indicator | Provides visual orientation reference only; does not define functional directionality in CA-suffix bidirectional devices. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5% for 'A' grade) and long-term reliability under thermal cycling and humidity exposure. |
| Fast response time | <1.0 ps - Limits voltage overshoot during ESD or lightning-induced transients before protected circuitry reacts. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - meets automotive electronics immunity requirements. |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - No floor-life limitation or bake requirement prior to reflow; simplifies manufacturing logistics. |
| Halogen-free construction | Complies with IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated end equipment. |
Applications
| Automotive Body Control Module | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump transients and alternator ripple in 12V/24V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt surge energy before it reaches sensitive logic. Use Value: Withstands 400W pulses and clamps to ≤59.3V, preventing latch-up or permanent damage to 3.3V/5V logic powered from buck-boost regulators. |
Use Scenario: Shields primary-side MOSFET gate drivers and controller ICs from switching noise and line surges in isolated 48V-to-12V industrial DC/DC modules. IC Role / Device Role / Timing Role: Fast-acting voltage clamp on input bulk capacitor node, absorbing high-di/dt transients generated by upstream contactors or cable inductance. Use Value: Sub-1ps response and 36.8V VWM allow reliable operation on 42–56V nominal inputs while maintaining margin below 60V absolute maximum ratings. |
| LED Driver Input Stage | Smart Meter Power Supply |
Use Scenario: Safeguards constant-current LED driver ICs against induced surges from nearby AC mains switching or lightning coupling in outdoor lighting fixtures. IC Role / Device Role / Timing Role: Primary overvoltage protection device mounted at AC/DC rectifier output, preceding bulk storage capacitor. Use Value: 400W rating and 59.3V clamping ensure LED strings remain undamaged during 1kV/500A surge events per IEC 61000-4-5. |
Use Scenario: Secures metering SoC power rails against conducted surges entering via utility-connected RS-485 or PLC communication ports. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on 3.3V or 5V internal supply, coordinated with primary MOV and series impedance. Use Value: <1μA leakage at 36.8V VWM prevents measurable current draw on battery-backed real-time clock circuits during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA (Bourns) | Same DO-214AA package; 600W PPPM; VC = 69.4V @ 5.8A; higher clamping voltage but greater surge headroom. | Preferred where higher single-event energy tolerance is prioritized over strict voltage clamping. | Select SMBJ43CA when system-level testing shows >400W surge margin is required and board space allows larger SMB footprint. |
| 1.5KE43CA (ON Semiconductor) | Through-hole DO-15 package; 1500W PPPM; VC = 69.4V @ 21.7A; significantly higher power but incompatible with SMT-only assembly. | Suitable for prototyping or legacy through-hole designs; not viable for high-density automated production. | Choose 1.5KE43CA only for manual assembly or retrofit scenarios where DO-15 footprint is already allocated and thermal mass justifies leaded construction. |
Compared with SMBJ43CA and 1.5KE43CA, the P4SMA43CA offers optimal balance of SMT manufacturability, 400W surge capability, and tight 59.3V clamping - making it ideal for space-constrained, high-volume automotive and industrial power supplies where DO-214AC footprint and low leakage are mandatory.
Availability
P4SMA43CA is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converter inputs, and smart meter power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA43CA 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 - headquartered in Hsinchu Science Park, Taiwan.
The P4SMA43CA belongs to TSC's P4SMAx family of surface-mount TVS diodes engineered specifically for high-reliability, automotive-grade transient suppression in compact, automated assembly environments.
FAQ
What is the polarity configuration of the P4SMA43CA?
The P4SMA43CA is a bidirectional TVS diode, denoted by the "CA" suffix. It functions identically in both forward and reverse directions, with symmetrical breakdown and clamping characteristics. The cathode band marking is for mechanical orientation only and does not indicate functional polarity - the P4SMA43CA may be placed without regard to terminal orientation on the PCB.
Does the P4SMA43CA meet automotive surge immunity standards?
Yes, the P4SMA43CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (supply disconnection and switching transients), and Pulse 3a/3b (capacitive coupling). Its 400W peak pulse power rating and verified clamping performance at 7.0A make it suitable for front-end protection in automotive ECUs and body electronics where compliance with OEM-level surge test plans is mandatory.
What is the maximum clamping voltage of the P4SMA43CA under surge conditions?
The P4SMA43CA has a maximum clamping voltage (VC) of 59.3 V when subjected to a 10/1000μs waveform peak impulse current (IPPM) of 7.0 A. This value is guaranteed across temperature and production lot, ensuring predictable overvoltage limiting for downstream 60V-rated components in 48V system architectures.
Can the P4SMA43CA be used in place of a unidirectional TVS like P4SMA43A?
No - the P4SMA43CA and P4SMA43A are electrically distinct: the "CA" version is bidirectional with symmetrical VBR and VC in both polarities, while the "A" version is unidirectional and requires correct anode/cathode orientation. Substituting one for the other without verifying circuit topology and surge directionality risks incomplete protection or device failure.
What is the moisture sensitivity level (MSL) and reflow profile guidance for the P4SMA43CA?
The P4SMA43CA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. It supports standard Pb-free reflow profiles with peak temperatures up to 260°C, and its matte tin-plated leads comply with J-STD-002 for reliable wetting and intermetallic formation during automated SMT assembly.
P4SMA43CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA43CA FAQ
1.How can I place an order for P4SMA43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CA 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 P4SMA43CA reliable?
The price and inventory of P4SMA43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CA is usually 5 days.
3.What payment methods are accepted for P4SMA43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CA?
P4SMA43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CA 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 P4SMA43CA?
For technical support, including P4SMA43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CA requirements.
6.How does Aetrix verify that P4SMA43CA is sourced from the original manufacturer or authorized distributors?
All P4SMA43CA 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 P4SMA43CA meets industry standards.
7.What is the process for return or replacement of P4SMA43CA?
All P4SMA43CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CA, 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 P4SMA43CA part is unused and in its original packaging.
Return procedure for P4SMA43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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