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Taiwan Semiconductor Corporation P4SMA43A
- Part No.:
- P4SMA43A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,226
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Product details
Overview
P4SMA43A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal paths. It features a 400W peak pulse power rating, 40.9–45.2V breakdown voltage (VBR), 36.8V working stand-off voltage (VWM), and clamps transients to ≤59.3V at 7.0A (10/1000μs waveform), making it suitable for protecting SMPS inputs and DC/DC converter rails.
For engineers reviewing the P4SMA43A datasheet, P4SMA43A pinout, P4SMA43A application, or P4SMA43A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, unidirectional polarity marking, sub-1ps response time, <1μA leakage at VWM, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics robustness.
Technical Context
The P4SMA43A operates as a silicon avalanche diode with glass-passivated junction, enabling fast clamping (<1.0ps typical response) and stable breakdown characteristics across temperature. Its unidirectional configuration provides reverse-biased surge suppression only, with forward conduction limited to ≤3.5V at 25A - critical for avoiding unintended forward conduction during fault events.
Designed for surface-mount automation, it meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance. The device sustains 40A non-repetitive forward surge (8.3ms half-sine) and operates across –55°C to +150°C junction temperature range, supporting industrial and automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 40.9–45.2V: Ensures reliable triggering above normal operating rail of 36.8V systems without false trips |
| VWM | 36.8V: Maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1μA |
| VC @ IPPM=7.0A | ≤59.3V: Clamped voltage seen by protected circuit during 10/1000μs surge - defines minimum safe margin for downstream ICs |
| PPPM | 400W: Peak pulse power handling per single transient event (10/1000μs waveform) |
| IR @ VWM | <1μA: Negligible standby current draw, preserving efficiency in always-on power rails |
| TJ max | +150°C: Enables placement near hot components (e.g., MOSFETs, inductors) without thermal derating concerns |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈0.060g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge current sink (reverse bias) | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Cathode | Reference terminal / Ground reference | Connected to system ground or low-impedance return path; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift under thermal cycling and humidity stress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| Fast response time <1.0ps | Clamps ESD and lightning-induced transients before sensitive ICs experience overstress |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - supports standard SMT assembly without process modification |
Applications
| Switching Mode Power Supply (SMPS) Input Protection | On-Board DC/DC Converter Rail Protection |
|---|---|
Use Scenario: Installed across input terminals of AC/DC or DC/DC converters to absorb line transients from mains switching or inductive loads. IC Role / Device Role / Timing Role: Unidirectional TVS diode providing primary overvoltage clamping at converter front-end. Use Value: Limits input surge to ≤59.3V, preventing damage to rectifier bridges, bulk capacitors, and controller ICs rated for 65V max. | Use Scenario: Placed on 12V or 24V intermediate bus rails feeding point-of-load regulators in embedded control modules. IC Role / Device Role / Timing Role: Standoff protector maintaining 36.8V operation while clamping load-dump spikes up to 400W. Use Value: Enables use of lower-voltage-rated MOSFETs and controllers on secondary rails without derating for worst-case surges. |
| Automotive Lighting Driver Protection | Industrial Adapter Output Protection |
Use Scenario: Mounted across LED driver outputs in headlamp or interior lighting modules exposed to battery disconnect/load dump events. IC Role / Device Role / Timing Role: Fast-acting clamp suppressing ISO 7637-2 Pulse 2b (inductive switch-off) transients on constant-current output lines. Use Value: Prevents latch-up or gate oxide failure in driver FETs by limiting transient voltage to 59.3V within <1ps. | Use Scenario: Integrated into wall adapter PCBs to protect USB-C PD or 5–24V output ports from user-induced surges or cable coupling. IC Role / Device Role / Timing Role: Secondary-side TVS ensuring output remains within ±5% regulation window during 10/1000μs transients. Use Value: Maintains compliance with IEC/UL 62368-1 transient immunity requirements without adding bulkier MOVs or varistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A (Bourns) | Same DO-214AA (SMB) package; 400W rating; VBR = 45.2–50.0V; VC = 69.4V @ 5.8A | Higher clamping voltage (+10.1V) and lower peak current (5.8A vs. 7.0A) reduce protection margin for 36.8V rails | Select when board space allows SMB footprint and higher VC is acceptable for downstream 70V-tolerant ICs |
| 1.5SMC43A (ON Semiconductor) | DO-214AB (SMC) package; 1500W rating; VBR = 45.2–50.0V; VC = 69.4V @ 21.7A | Larger SMC footprint and higher clamping limit suitability to high-energy industrial surges, not compact consumer adapters | Choose for legacy designs using SMC pads or where 1500W energy absorption is required beyond automotive load-dump profiles |
Compared with SMBJ43A and 1.5SMC43A, the P4SMA43A delivers tighter VBR tolerance (±5.5%), lower VC (59.3V), and optimal fit for space-constrained DO-214AC layouts - making it preferred for modern SMPS and automotive ECUs where clamping precision and footprint efficiency are critical.
Availability
P4SMA43A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and automotive lighting drivers requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA43A 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial, automotive, and consumer markets.
The P4SMA43A belongs to TSC's P4SMA series of 400W surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in compact, automated PCB assemblies where DO-214AC footprint and ISO 7637-2 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the P4SMA43A under standard test conditions?
The P4SMA43A has a maximum clamping voltage (VC) of 59.3V when subjected to a 10/1000μs surge waveform at 7.0A peak current. This value is measured per JEDEC standards and guarantees that protected circuits will not experience voltages exceeding this threshold during defined transient events - a critical parameter for ensuring compatibility with 60V-rated downstream components.
Is the P4SMA43A suitable for bidirectional transient suppression?
No, the P4SMA43A is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical specifications apply only in reverse-bias mode; forward conduction is limited to ≤3.5V at 25A. For bidirectional protection, select the P4SMA43CA variant, which uses a center-tapped configuration and meets symmetrical breakdown in both polarities.
What packaging and reel quantity is offered for the P4SMA43A?
The P4SMA43A is supplied in DO-214AC (SMA) package format on 7,500-piece tape-and-reel. This standard SMT packaging supports high-speed pick-and-place assembly and complies with J-STD-020 moisture sensitivity level 1 - eliminating pre-bake requirements and enabling direct placement into reflow ovens.
Does the P4SMA43A meet automotive-grade reliability standards?
Yes, the P4SMA43A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for automotive electrical disturbances and is qualified for operation from –55°C to +150°C junction temperature. Its glass-passivated junction and JESD 201 class 2 whisker resistance further support deployment in engine control units, body electronics, and lighting modules.
How does the P4SMA43A compare to the P4SMA43 (non-A) variant?
The P4SMA43A offers tighter breakdown voltage tolerance (40.9–45.2V, ±5.5%) versus the P4SMA43 (38.7–47.3V, ±11%). This improved VBR consistency ensures more predictable clamping behavior in precision power rails. Both share identical package, power rating, and thermal specs - but the 'A' suffix denotes enhanced parametric grading for critical applications.
P4SMA43A 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA43A FAQ
1.How can I place an order for P4SMA43A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43A 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 P4SMA43A reliable?
The price and inventory of P4SMA43A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43A is usually 5 days.
3.What payment methods are accepted for P4SMA43A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43A?
P4SMA43A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43A 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 P4SMA43A?
For technical support, including P4SMA43A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43A requirements.
6.How does Aetrix verify that P4SMA43A is sourced from the original manufacturer or authorized distributors?
All P4SMA43A 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 P4SMA43A meets industry standards.
7.What is the process for return or replacement of P4SMA43A?
All P4SMA43A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43A, 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 P4SMA43A part is unused and in its original packaging.
Return procedure for P4SMA43A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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