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Taiwan Semiconductor Corporation P4SMA20CA
- Part No.:
- P4SMA20CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20CA.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,180
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Product details
Overview
P4SMA20CA 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 20V working stand-off voltage (VWM), 22.8V–25.2V breakdown voltage (VBR) at 1mA, 27.7V clamping voltage (VC) at 15A 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 P4SMA20CA datasheet, P4SMA20CA pinout, P4SMA20CA application, or P4SMA20CA equivalent, this page delivers verified electrical parameters, DO-214AC package details, bidirectional clamping behavior, ISO 7637-2 compliance evidence, and real-world design implications for automotive and industrial surge protection.
Technical Context
The P4SMA20CA operates as a bipolar junction TVS diode with symmetrical reverse/forward clamping characteristics, enabling bidirectional transient suppression without polarity dependency. Its glass-passivated chip junction ensures stable VBR tolerance (±5% for 'A' grade) and low leakage (<1μA at VWM), while the 1.0ps typical response time guarantees protection against fast-rising ESD and load-dump transients.
Thermally rated for TJ = –55°C to +150°C and housed in a UL 94V-0 compliant DO-214AC (SMA) package, the device supports automated placement and meets JESD201 Class 2 whisker resistance. It is explicitly designated for bidirectional use per manufacturer's suffix convention ('CA'), with electrical specs validated in both directions per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating DC rail margin. |
| VBR min/max | 22.8 V / 25.2 V at IT = 1 mA - Tight 5% tolerance ensures predictable turn-on during transients. |
| VC @ IPPM | 27.7 V at 15.0 A (10/1000μs) - Clamped voltage limits downstream IC stress during 400W surge events. |
| PPPM | 400 W - Peak pulse power handling capability per single non-repetitive 10/1000μs waveform. |
| IR @ VWM | <1 μA - Negligible standby leakage preserves battery life and signal integrity in always-on circuits. |
| TJ max | +150 °C - Enables reliable operation in high-temperature environments such as under-hood automotive modules. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal serves as input/output; no orientation dependency simplifies PCB layout and eliminates assembly errors. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1, 2a, 2b, 3a, and 3b waveforms - enables direct integration into automotive power supply protection without additional filtering. |
| Fast response time | <1.0 ps - Captures sub-nanosecond ESD events before sensitive logic or analog circuitry is damaged. |
| Glass passivated junction | Enhanced long-term reliability and stable VBR drift over temperature and lifetime vs. epoxy-passivated alternatives. |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - No bake requirement prior to reflow, reducing manufacturing cost and process complexity. |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24V CAN bus power inputs against load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC/DC regulator input to clamp ±100V transients to ≤27.7V. Use Value: Prevents regulator latch-up or destruction during ISO 7637-2 Pulse 5a (load dump), enabling single-stage protection without series resistors or filters. |
Use Scenario: Safeguarding isolated 48V-to-12V DC/DC converter primary-side input in factory automation controllers. IC Role / Device Role / Timing Role: Transient shunt across input bulk capacitor to absorb repetitive 400W surges from relay switching or motor commutation. Use Value: Maintains system uptime by limiting input voltage excursions to 27.7V, avoiding overvoltage shutdown of the controller IC. |
| LED Driver Overvoltage Clamp | USB-C Power Delivery Line Protection |
Use Scenario: Securing constant-current LED driver ICs in streetlight systems exposed to lightning-induced surges on 24–48V distribution lines. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing induced common-mode transients before they reach driver MOSFET gate or current-sense amplifier. Use Value: Eliminates need for external varistors or gas discharge tubes, reducing BOM count and board space while meeting IEC 61000-4-5 Level 3. |
Use Scenario: Protecting USB-C PD port VBUS line in portable medical devices against hot-plug and ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 100 pF at VR = 0 V) placed directly at connector to suppress ±15kV contact ESD per IEC 61000-4-2. Use Value: Preserves signal integrity on high-speed CC and SBU lines due to minimal parasitic capacitance and absence of DC bias dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA (Bourns) | Same DO-214AA package; 600W PPPM rating; higher VC = 32.4V at 12.3A. | Higher power handling but larger clamping voltage reduces margin for 24V systems with tight voltage tolerances. | Select when surge energy exceeds 400W but board space allows SMB footprint. |
| 1.5KE20CA (ON Semiconductor) | DO-201 package; through-hole; 1500W PPPM; VC = 34.6V at 43.3A. | Not surface-mountable; requires manual assembly or wave soldering; unsuitable for high-density automated production. | Choose only for legacy through-hole designs or where extreme surge energy dominates layout constraints. |
Compared with SMBJ20CA and 1.5KE20CA, the P4SMA20CA offers optimal balance of 400W surge capability, compact DO-214AC footprint, and low 27.7V clamping - making it preferred for space-constrained, high-volume automotive and industrial SMPS designs requiring RoHS/halogen-free compliance.
Availability
P4SMA20CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, and LED driver overvoltage clamping requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4SMA20CA 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.
The P4SMA20CA belongs to TSC's P4SMAx(A) family of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient suppression in harsh-environment power systems.
FAQ
What does the 'CA' suffix mean in P4SMA20CA?
The 'CA' suffix in P4SMA20CA indicates a bidirectional configuration with 5% VBR tolerance ('A' grade) and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b. Unlike unidirectional variants (e.g., P4SMA20A), the P4SMA20CA provides symmetrical clamping in both polarities - critical for protecting AC-coupled or floating DC lines where voltage reversal may occur during transients.
Is P4SMA20CA compatible with lead-free reflow soldering?
Yes, P4SMA20CA is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020). Its DO-214AC (SMA) package uses matte tin-plated leads that meet J-STD-002 solderability requirements, and its MSL Level 1 rating means no pre-bake is needed before assembly - ensuring reliable interconnects without thermal stress to the glass-passivated junction.
How does P4SMA20CA compare to P4SMA20A in circuit performance?
P4SMA20A is unidirectional with cathode marking and forward conduction capability, whereas P4SMA20CA is bidirectional with no polarity marking and identical clamping in both directions. For a 24V automotive rail subject to load dump (positive) and reverse battery (negative), P4SMA20CA eliminates the need for two unidirectional devices - simplifying layout and improving surge symmetry without compromising VWM (17.1V) or VC (27.7V).
What is the maximum peak pulse current (IPPM) for P4SMA20CA?
The maximum peak pulse current (IPPM) for P4SMA20CA is 15.0 A under the standardized 10/1000μs double-exponential waveform. This value corresponds directly to its 400W peak pulse power rating (PPPM = VC × IPPM = 27.7V × 15.0A) and is validated per Figure 5 in the official Taiwan Semiconductor datasheet revision S2102.
Does P4SMA20CA meet halogen-free and RoHS requirements?
Yes, P4SMA20CA complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants (BFRs), chlorinated flame retardants (CFRs), or antimony trioxide - confirmed in TSC's material declarations and supported by UL 94V-0 flammability certification for the DO-214AC package.
P4SMA20CA 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 15A
- 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)
P4SMA20CA FAQ
1.How can I place an order for P4SMA20CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20CA 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 P4SMA20CA reliable?
The price and inventory of P4SMA20CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA20CA is usually 5 days.
3.What payment methods are accepted for P4SMA20CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20CA?
P4SMA20CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20CA 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 P4SMA20CA?
For technical support, including P4SMA20CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20CA requirements.
6.How does Aetrix verify that P4SMA20CA is sourced from the original manufacturer or authorized distributors?
All P4SMA20CA 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 P4SMA20CA meets industry standards.
7.What is the process for return or replacement of P4SMA20CA?
All P4SMA20CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20CA, 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 P4SMA20CA part is unused and in its original packaging.
Return procedure for P4SMA20CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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