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Taiwan Semiconductor Corporation P4SMA56AH
- Part No.:
- P4SMA56AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56AH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,425
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Product details
Overview
P4SMA56AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 53.2–58.8V breakdown voltage at 1mA, 47.8V working stand-off voltage, and 77.0V clamping voltage at 5.4A (10/1000μs waveform), used for overvoltage protection in DC/DC converters and automotive power supplies.
For engineers reviewing the P4SMA56AH datasheet, P4SMA56AH pinout, P4SMA56AH application, or P4SMA56AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, moisture sensitivity level 1, and compatibility with automated SMT placement in high-reliability industrial and automotive power rails.
Technical Context
The P4SMA56AH employs a glass-passivated silicon junction optimized for fast transient suppression with sub-1ps response time and low leakage (<1μA at 47.8V). Its unidirectional configuration provides reverse-biased clamping only, requiring correct polarity alignment relative to protected circuitry.
Designed for 10/1000μs surge waveforms per IEC 61000-4-5 and ISO 7637-2, it delivers 77.0V clamping at 5.4A peak impulse current while maintaining thermal stability across –55°C to +150°C operating junction temperature range and meeting JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 53.2V / 58.8V at 1mA test current - defines reliable conduction onset window for overvoltage triggering |
| VWM | 47.8V - maximum continuous reverse voltage before significant leakage begins |
| VC@IPPM | 77.0V at 5.4A (10/1000μs) - peak clamped voltage seen by protected IC during surge |
| PPPM | 400W - peak pulse power handling capability under standardized surge waveform |
| IR@VWM | <1μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - enables operation in under-hood automotive and high-power SMPS environments |
| Package | DO-214AC (SMA) - industry-standard SMT footprint compatible with JEDEC MS-013AC outline |
Pinout & Package
DO-214AC (SMA) package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48V rail); conducts when line voltage exceeds VBR in reverse direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress |
| Fast response time | <1.0ps - ensures clamping activation prior to damage threshold of downstream MOSFETs or controllers |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) immunity requirements |
| Moisture sensitivity level 1 | Enables unlimited floor life and reflow without baking preconditioning per J-STD-020 |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 48V battery-fed ECUs against load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges above 53.2V. Use Value: Limits peak voltage to 77.0V during 5.4A ISO 7637-2 Pulse 1 events, preventing damage to upstream PMICs and microcontrollers. | Use Scenario: Safeguarding isolated flyback controller inputs in factory automation power modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary-side DC bus to absorb switching noise and line surges before regulation stage. Use Value: Maintains 47.8V working stand-off while delivering 400W pulse absorption, enabling robust operation in noisy 24V/48V industrial environments. |
| LED Driver Overvoltage Clamp | Telecom Power Supply Surge Suppression |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers subjected to accidental 48V supply misconnection. IC Role / Device Role / Timing Role: Reverse-biased TVS across driver input terminals to shunt overvoltage before internal FET breakdown. Use Value: Clamps fault condition to ≤77.0V within <1ps, preserving driver IC integrity without affecting normal 42V nominal operation. | Use Scenario: Front-end protection for PoE-powered equipment exposed to lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output of midspan injector to limit transient propagation to powered device. Use Value: Handles 10/1000μs surges up to 5.4A while exhibiting <1μA leakage at 47.8V, minimizing standby power impact on energy-sensitive PDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A | 600W rating, SMB package (larger footprint), VBR = 62.2–68.8V, VC = 93.6V @ 6.4A | Higher power margin but requires PCB layout change; less suitable for space-constrained automotive modules | Select SMBJ56A only if system-level surge testing exceeds 400W or board area permits larger SMB footprint |
| 1.5SMC56A | 1500W rating, SMC package (3x larger), VBR = 58.8–64.8V, VC = 93.6V @ 16.0A | Over-specified for typical 400W requirements; introduces unnecessary cost and volume in compact designs | Prefer P4SMA56AH where 400W capacity suffices and DO-214AC footprint aligns with existing SMT process |
Compared with SMBJ56A and 1.5SMC56A, the P4SMA56AH offers optimal balance of AEC-Q101 qualification, DO-214AC footprint compatibility, and precise 47.8V stand-off for 48V systems-enabling drop-in replacement in automotive and industrial layouts without sacrificing surge margin or thermal derating headroom.
Availability
P4SMA56AH 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 and full traceability.
Supply support for P4SMA56AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices for automotive and industrial markets.
The P4SMA56AH belongs to TSC's AEC-Q101-qualified P4SMA(A)H series, engineered specifically for high-reliability transient suppression in 12V–48V automotive and industrial power systems where compact size, low leakage, and ISO 7637-2 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance for P4SMA56AH?
The P4SMA56AH has a specified breakdown voltage range of 53.2V to 58.8V at 1mA test current, representing ±5% tolerance around the nominal 56V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margining in 48V systems where overvoltage thresholds must be tightly controlled.
Is P4SMA56AH suitable for bidirectional transient protection?
No, the P4SMA56AH is a unidirectional TVS diode and provides clamping only in reverse bias. For bidirectional protection, Taiwan Semiconductor offers the P4SMA56CAH variant (with CAH suffix), which features symmetrical breakdown in both polarities. Using P4SMA56AH in bidirectional applications risks failure during positive-going transients on the anode side.
Does P4SMA56AH meet automotive qualification standards?
Yes, the P4SMA56AH is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, HTRB, temperature cycling, and ESD. It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements, making it suitable for front-end protection in engine control units, body control modules, and ADAS power supplies.
What is the maximum clamping voltage of P4SMA56AH under surge conditions?
The P4SMA56AH exhibits a maximum clamping voltage (VC) of 77.0V at 5.4A peak pulse current using the standard 10/1000μs waveform. This value is guaranteed across temperature and represents the highest voltage imposed on protected circuitry during worst-case transient events, enabling accurate downstream component voltage rating selection.
Can P4SMA56AH be used in lead-free reflow processes?
Yes, the P4SMA56AH uses matte tin-plated leads compliant with J-STD-002 and supports standard lead-free reflow profiles up to 260°C peak temperature. Its DO-214AC package is rated for moisture sensitivity level 1 per J-STD-020, eliminating bake requirements and enabling direct placement into high-volume SMT lines without process modification.
P4SMA56AH 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):
- 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)
P4SMA56AH FAQ
1.How can I place an order for P4SMA56AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56AH 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 P4SMA56AH reliable?
The price and inventory of P4SMA56AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56AH is usually 5 days.
3.What payment methods are accepted for P4SMA56AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56AH?
P4SMA56AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56AH 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 P4SMA56AH?
For technical support, including P4SMA56AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56AH requirements.
6.How does Aetrix verify that P4SMA56AH is sourced from the original manufacturer or authorized distributors?
All P4SMA56AH 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 P4SMA56AH meets industry standards.
7.What is the process for return or replacement of P4SMA56AH?
All P4SMA56AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56AH, 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 P4SMA56AH part is unused and in its original packaging.
Return procedure for P4SMA56AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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