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Taiwan Semiconductor Corporation P4SMA56CAH
- Part No.:
- P4SMA56CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56CAH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,681
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Product details
Overview
P4SMA56CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 53.2V–58.8V breakdown voltage (VBR), 47.8V working stand-off voltage (VWM), and 77.0V clamping voltage (VC) at 5.4A peak pulse current - designed for automotive-grade surge protection in DC/DC converters and lighting systems.
For engineers reviewing the P4SMA56CAH datasheet, P4SMA56CAH pinout, P4SMA56CAH application, or P4SMA56CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, and ≤1µA reverse leakage at VWM.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast transient suppression with low capacitance and stable breakdown characteristics across -55°C to +150°C operating junction temperature. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity concerns.
The device meets stringent automotive EMC requirements per ISO 7637-2 (Pulse 1, 2a, 2b, 3a, 3b) and is rated for 400W peak pulse power under 10/1000μs waveform, with thermal derating above 25°C ambient per published curve (Fig.2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 53.2V / 58.8V at 1mA test current - defines reliable conduction onset range for overvoltage triggering |
| VWM | 47.8V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below breakdown |
| VC @ IPPM | 77.0V at 5.4A (10/1000μs) - clamped voltage seen by protected circuit during worst-case surge |
| IR @ VWM | <1µA - ensures minimal power loss and signal integrity in standby or low-power states |
| PPPM | 400W - peak surge energy handling capacity under standardized 10/1000μs transient waveform |
| TJ max | +150°C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Response time | <1.0ps - sub-nanosecond turn-on guarantees protection of fast-edge digital and analog signals |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; dual-terminal configuration - no internal pins, terminals are anode and cathode as marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; reference node for bidirectional clamping | Connected to line being protected; forms symmetrical clamp path with cathode during either polarity surge |
| Cathode | Current exit point in forward bias; marked with band on package | Provides polarity identification; completes low-impedance surge shunt path to ground or rail when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliant | Guarantees robustness against load dump, supply transients, and coupled noise in vehicle electrical systems |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related failures |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for environmentally responsible manufacturing |
Applications
| Automotive Lighting Control | On-Board DC/DC Converter Input |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump spikes and alternator ripple in headlamp modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp both positive and negative transients before they reach sensitive control logic. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a (load dump), maintaining system uptime and functional safety compliance. | Use Scenario: Safeguarding buck converter input stage against battery line surges in ADAS domain controllers. IC Role / Device Role / Timing Role: Primary front-end surge suppressor absorbing 400W transients while limiting clamped voltage to 77.0V. Use Value: Enables use of lower-voltage-rated MOSFETs and input capacitors, reducing BOM cost and PCB footprint. |
| Industrial Switching Power Supply | USB-C PD Adapter Secondary Side |
Use Scenario: Suppressing switching noise and cross-talk-induced transients on auxiliary bias rails in telecom SMPS units. IC Role / Device Role / Timing Role: Fast-response (<1ps) clamping device placed near secondary-side controller ICs to prevent false triggering or reset events. Use Value: Maintains stable feedback loop operation under EFT/burst conditions per IEC 61000-4-4, improving system immunity certification success rate. | Use Scenario: Protecting USB-C CC logic and VCONN regulators from hot-plug induced transients and cable ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS on CC and VCONN lines to handle ±15kV contact ESD (IEC 61000-4-2) and ±2kV data-line surges. Use Value: Eliminates need for additional series resistors or RC filters, preserving signal integrity and USB PD handshake timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | 600W rating, SMB package (larger footprint), VC = 93.6V @ 6.4A | Higher power handling but larger board area; less suitable for space-constrained automotive modules | Select when higher surge margin is required and PCB layout allows SMB footprint |
| 1.5KE56CA | Through-hole TO-204AA (DO-41), 1500W rating, VC = 92.0V @ 16.3A | Not SMT-compatible; requires wave soldering; unsuitable for automated high-volume assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with P4SMA56CAH, SMBJ58CA offers higher surge capacity but increases PCB area and thermal mass, while 1.5KE56CA sacrifices SMT manufacturability for raw power - making P4SMA56CAH optimal for AEC-Q101-compliant, space-constrained, high-volume automotive SMT applications.
Availability
P4SMA56CAH is available at Aetrix Electronics and suitable for automotive lighting control, on-board DC/DC converter input protection, and industrial switching power supply designs requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for P4SMA56CAH 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 automotive, industrial, and consumer markets.
The P4SMA56CAH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H family of surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive electronics and harsh-environment industrial power systems.
FAQ
What does the "CAH" suffix indicate in P4SMA56CAH?
The "CAH" suffix in P4SMA56CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). This distinguishes it from unidirectional variants (e.g., P4SMA56AH) and confirms compliance with automotive reliability and environmental standards. The P4SMA56CAH operates identically in both polarities, making it ideal for AC-coupled or floating signal lines.
Is P4SMA56CAH compatible with lead-free reflow soldering processes?
Yes, P4SMA56CAH is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020 Level 1), thanks to its moisture sensitivity level 1 rating and matte tin-plated leads. No pre-baking is required prior to assembly, supporting high-yield, high-speed SMT production. The P4SMA56CAH maintains parameter stability after exposure to peak temperatures up to 260°C.
How does P4SMA56CAH meet ISO 7637-2 requirements?
P4SMA56CAH is tested and specified to withstand all five ISO 7637-2 transient pulses (Pulse 1, 2a, 2b, 3a, 3b) common in 12V automotive electrical systems. Its 400W peak pulse power rating, 77.0V clamping voltage, and sub-1ps response ensure effective suppression of load dump, jump-start, and inductive switching events. The P4SMA56CAH datasheet explicitly references ISO 7637-2 compliance in its features section.
What is the maximum clamping voltage of P4SMA56CAH under surge conditions?
The maximum clamping voltage (VC) of P4SMA56CAH is 77.0V at 5.4A peak impulse current (IPPM) under the standardized 10/1000μs waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case transient events and is measured per ANSI/IEEE C62.35. The P4SMA56CAH maintains this clamping performance across its full operating temperature range (-55°C to +150°C).
Can P4SMA56CAH replace unidirectional TVS diodes in existing designs?
No - P4SMA56CAH is a bidirectional device and must not be substituted for unidirectional TVS diodes (e.g., P4SMA56AH) without circuit review. While both share identical VWM, VBR, and VC ratings, the bidirectional nature of P4SMA56CAH means it conducts in both directions, potentially altering biasing or leakage paths in DC-coupled circuits. Always verify polarity requirements and signal topology before using P4SMA56CAH as a replacement.
P4SMA56CAH 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 5.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA56CAH FAQ
1.How can I place an order for P4SMA56CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56CAH 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 P4SMA56CAH reliable?
The price and inventory of P4SMA56CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56CAH is usually 5 days.
3.What payment methods are accepted for P4SMA56CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56CAH?
P4SMA56CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56CAH 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 P4SMA56CAH?
For technical support, including P4SMA56CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56CAH requirements.
6.How does Aetrix verify that P4SMA56CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA56CAH 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 P4SMA56CAH meets industry standards.
7.What is the process for return or replacement of P4SMA56CAH?
All P4SMA56CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56CAH, 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 P4SMA56CAH part is unused and in its original packaging.
Return procedure for P4SMA56CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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