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Taiwan Semiconductor Corporation P4SMA30CA
- Part No.:
- P4SMA30CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CA.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
P4SMA30CA 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 30V working stand-off voltage (VWM), 31.5V minimum breakdown voltage (VBR), 41.4V maximum clamping voltage (VC) at 10A peak pulse current, and 400W peak pulse power rating under 10/1000μs waveform - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA30CA datasheet, P4SMA30CA pinout, P4SMA30CA application, or P4SMA30CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AC (SMA) package compatibility, low leakage (<1μA at VWM), and thermal stability up to +150°C junction temperature.
Technical Context
The P4SMA30CA implements a glass-passivated silicon avalanche junction optimized for fast transient suppression with sub-1ps response time. Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management, supporting unidirectional or bidirectional signal/power line protection without circuit redesign.
It operates across -55°C to +150°C junction temperature range and maintains stable VBR temperature coefficient of 0.097%/°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for high-reliability industrial and automotive-grade PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe DC rail margin for 24V systems. |
| VBR (min/max) | 28.5 V / 31.5 V @ 1mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients above nominal rail. |
| VC @ IPPM | 41.4 V @ 10A, 10/1000μs - Clamped voltage during worst-case surge; limits downstream IC stress to ≤42V in 24V applications. |
| PPPM | 400 W - Peak pulse power handling per single transient; supports repeated ESD/EFT events per IEC 61000-4-2/4-4. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off; avoids measurable power loss or bias shift in high-impedance monitoring circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in enclosed, thermally constrained environments like LED drivers or automotive ECUs. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 0.060g mass; compatible with automated pick-and-place and reflow profiles per J-STD-020 Level 1. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by band (bidirectional operation means band denotes common reference, not unidirectional cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Bidirectional terminal pair | Identical electrical behavior in either direction; band serves as mechanical orientation marker only - no functional polarity dependency. |
| Case | Non-connected | Plastic encapsulation provides insulation; no thermal or electrical connection to die - heat dissipation occurs via PCB copper pour under leads. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity awareness - reduces BOM count vs. dual-unidirectional setup. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) - meets automotive OEM requirements out-of-box. |
| Sub-1ps response time | Clamps transients before sensitive logic or analog circuitry responds - critical for protecting USB, CAN, or sensor interfaces from fast ESD bursts. |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to assembly - simplifies SMT line logistics and eliminates moisture-related popcorning risk during reflow. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance without derating or substitution. |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of 24V input rail against load dump and alternator ripple in industrial SMPS units. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at DC input connector to shunt surge energy before upstream controller ICs. Use Value: Limits peak rail voltage to 41.4V during 400W transients, preventing damage to 36V-rated MOSFETs and PWM controllers. |
Use Scenario: Input protection for 12V-to-5V/3.3V DC/DC modules in automotive body control modules (BCMs). IC Role / Device Role / Timing Role: Bidirectional TVS absorbing reverse-polarity jump-start events and ISO 7637-2 Pulse 1 surges on vehicle battery lines. Use Value: Withstands ±30V reverse connection and 100V/50ms load dump pulses while maintaining <1μA leakage at 25.6V nominal. |
| LED Driver Power Stage | Industrial Sensor Interface |
Use Scenario: Output-side protection in constant-current LED drivers exposed to cable discharge events during field servicing. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED string terminals to clamp inductive kickback and ESD from handling. Use Value: Sub-1ps response prevents latch-up in driver ICs; 41.4V VC ensures LED forward voltage (typically 24–36V) remains within safe operating area. |
Use Scenario: Protection of analog sensor inputs (e.g., pressure, temperature) connected to long harnesses in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to suppress coupled noise and EFT bursts without distorting mV-level signals. Use Value: <1μA leakage avoids DC offset errors; DO-214AC footprint allows placement within 2mm of connector for optimal high-frequency filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA (Bourns) | Higher VWM (28.2V), higher VC (53.3V @ 7.5A), same 400W PPPM, SMB package (larger footprint) | Less precise clamping margin for 24V systems; requires PCB layout revision due to larger SMB footprint | Select when higher surge current margin is needed and board space permits larger package |
| 1.5KE33CA (ON Semiconductor) | Through-hole DO-201 package, same VWM/VC specs, 1500W PPPM but slower response (>1ns), higher IR (5μA) | Not suitable for high-density SMT designs; higher leakage may affect precision sensor bias networks | Select only for legacy through-hole designs where manual assembly or high-energy single-event tolerance is prioritized over speed and leakage |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA30CA offers tighter clamping (41.4V vs. 53.3V/53.3V), lower leakage (<1μA vs. 5μA), and DO-214AC footprint - making it optimal for space-constrained, low-power, high-precision 24V protection where fast response and minimal system impact are critical.
Availability
P4SMA30CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and industrial sensor interfaces requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA30CA 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, automotive, and consumer applications.
The P4SMA30CA belongs to TSC's P4SMAxxCA family of bidirectional surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant automotive and ruggedized industrial power rail protection with high reliability and tight parametric consistency.
FAQ
What is the clamping voltage of the P4SMA30CA under standard test conditions?
The P4SMA30CA has a maximum clamping voltage (VC) of 41.4 V when subjected to a 10 A peak pulse current with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures predictable voltage limiting during transient events - critical for safeguarding downstream 36V-rated components in 24V systems. The P4SMA30CA achieves this while maintaining sub-1ps response time and <1μA leakage at its 25.6V working stand-off voltage.
Is the P4SMA30CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the P4SMA30CA is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - making it qualified for direct integration into automotive power distribution networks, including BCMs and infotainment head units. Its bidirectional architecture handles reverse-battery and load-dump events without polarity constraints, and its DO-214AC package supports automated SMT assembly in AEC-Q200-aligned production lines. The P4SMA30CA's 0.097%/°C VBR temperature coefficient ensures stable performance across -55°C to +150°C.
How does the P4SMA30CA differ from the unidirectional P4SMA30A variant?
The P4SMA30CA is bidirectional, meaning it clamps symmetrically in both polarities, whereas the P4SMA30A is unidirectional and conducts only in reverse bias. This makes the P4SMA30CA ideal for AC-coupled lines or floating DC rails where polarity reversal is possible - such as automotive battery inputs or RS-485 data lines. The P4SMA30CA retains identical VWM (25.6V), VBR (28.5–31.5V), and VC (41.4V) specs as P4SMA30A, but its bidirectional nature eliminates need for external polarity management circuitry.
What is the maximum junction temperature and thermal derating behavior of the P4SMA30CA?
The P4SMA30CA has a maximum junction temperature (TJ) of +150°C and follows standard derating per Figure 2 in its datasheet: peak pulse power decreases linearly from 400W at 25°C ambient to ~240W at 100°C ambient. Its glass-passivated junction and DO-214AC package enable efficient conduction cooling through PCB copper, and its J-STD-020 Level 1 moisture sensitivity eliminates bake requirements. This thermal profile makes the P4SMA30CA suitable for sealed enclosures and high-temperature engine bay locations where the P4SMA30CA must sustain repeated surge events without degradation.
Does the P4SMA30CA require special PCB layout considerations for optimal ESD protection?
Yes - for optimal high-frequency transient suppression, the P4SMA30CA should be placed within 2 mm of the protected connector or IC pin, with short, wide traces to minimize inductance. Its DO-214AC footprint supports direct mounting at board edges or near I/O connectors. Avoid routing sensitive analog traces near the P4SMA30CA's current path, and use solid ground planes beneath the device to enhance return-path integrity. These practices ensure the P4SMA30CA's sub-1ps response delivers effective clamping - especially critical for protecting CAN, LIN, or sensor interfaces where layout-induced inductance can degrade real-world performance.
P4SMA30CA 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 10A
- 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)
P4SMA30CA FAQ
1.How can I place an order for P4SMA30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CA 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 P4SMA30CA reliable?
The price and inventory of P4SMA30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30CA is usually 5 days.
3.What payment methods are accepted for P4SMA30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CA?
P4SMA30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CA 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 P4SMA30CA?
For technical support, including P4SMA30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CA requirements.
6.How does Aetrix verify that P4SMA30CA is sourced from the original manufacturer or authorized distributors?
All P4SMA30CA 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 P4SMA30CA meets industry standards.
7.What is the process for return or replacement of P4SMA30CA?
All P4SMA30CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CA, 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 P4SMA30CA part is unused and in its original packaging.
Return procedure for P4SMA30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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