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Taiwan Semiconductor Corporation P4SMA56H
- Part No.:
- P4SMA56H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56H.pdf
- Description:
- 400W, 56V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,392
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Product details
Overview
P4SMA56H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 50.4–61.6V breakdown voltage, 45.4V working stand-off voltage, and 80.5V clamping voltage at 5.2A peak pulse current. It provides robust ESD and surge protection for DC power rails in automotive-grade SMPS and on-board DC/DC converters.
For engineers reviewing the P4SMA56H datasheet, P4SMA56H pinout, P4SMA56H application, or P4SMA56H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, DO-214AC package compatibility, and sub-1ps response time in harsh automotive environments.
Technical Context
The P4SMA56H uses a glass-passivated silicon junction to achieve fast transient response (<1.0 ps) and low leakage (<1 µA at 45.4V). Its unidirectional configuration supports reverse-biased protection of positive-rail systems, with clamping defined per the 10/1000 µs waveform standard (IEC 61000-4-5, ISO 7637-2).
Thermal derating follows a linear curve above 25°C ambient, maintaining 400W peak pulse power at TA ≤ 25°C and retaining >50% capability up to 100°C. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 50.4 V / 61.6 V - Ensures reliable triggering above system nominal voltage while avoiding false trips during transients |
| VWM | 45.4 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; sets upper limit for protected rail voltage |
| VC@IPPM | 80.5 V - Clamped voltage during 5.2 A, 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs |
| PPPM | 400 W - Peak pulse power handling per single non-repetitive event; validates compliance with ISO 7637-2 Pulse 5a |
| IPPM | 5.2 A - Peak impulse current at rated clamping voltage; used to size upstream fusing and PCB trace width |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without thermal shutdown |
| Response time | <1.0 ps - Sub-picosecond junction response ensures suppression before sensitive logic or analog circuitry is stressed |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode unidirectional configuration. Cathode indicated by molded band on case body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for protected line | Connected to positive rail or signal line requiring surge suppression; forms cathode-to-rail clamp path |
| Cathode | Clamp return path | Connected to ground or lower-potential reference; carries full surge current during transient events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD-HBM/MM, enabling use in engine control and ADAS modules |
| Glass passivated junction | Eliminates wire bond susceptibility and improves long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| DO-214AC (SMA) footprint | Enables automated placement and reflow soldering; compatible with legacy SMA land patterns and pick-and-place tooling |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing and end-of-life processing |
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 before they reach PMIC or MCU power inputs. Use Value: Limits peak voltage to 80.5 V during 5.2 A ISO 7637-2 Pulse 5a events, preventing latch-up or gate oxide damage in downstream regulators. | Use Scenario: Safeguarding isolated 24V-to-5V DC/DC converter primary-side inputs in factory automation controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive switching spikes from MOSFET flyback energy and relay coil de-energization. Use Value: Maintains <1 µA leakage at 45.4 V, ensuring minimal standby current drain while clamping 10/1000 µs transients to safe levels. |
| LED Driver Supply Protection | Telecom Power Adapter Interface |
Use Scenario: Securing constant-current LED driver ICs in outdoor streetlight systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line TVS on 36–48V input bus, positioned ahead of bulk capacitor and controller IC. Use Value: Responds in <1 ps to divert >5 A transients, preserving driver IC lifetime and meeting IEC 61000-4-5 Level 4 immunity requirements. | Use Scenario: Hardening AC/DC adapter outputs against ESD and conducted noise in PoE-powered access points. IC Role / Device Role / Timing Role: Output-side TVS on regulated 12V or 24V output rail, protecting Ethernet PHY and microcontroller interfaces. Use Value: Provides 400W peak pulse rating with 80.5V clamping, ensuring stable voltage delivery during 8 kV contact ESD events per IEC 61000-4-2. |
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), 56V bidirectional variant; higher clamping voltage (93.6V) | Preferred where bidirectional protection or higher surge margin is required; not AEC-Q101 qualified | Select when system requires symmetrical surge handling or higher peak power, but verify PCB layout change for SMB pad dimensions |
| 1.5SMC56A | 1500W rating, SMC package (3.5×7.2 mm), 56V bidirectional; clamping voltage 93.6V; higher leakage (5 µA @ VWM) | Used in industrial power supplies needing higher energy absorption; lacks automotive qualification | Choose for high-energy surge environments where space allows larger SMC footprint and AEC-Q101 is not mandated |
Compared with P4SMA56H, SMBJ56A offers greater peak power but requires board redesign and lacks automotive qualification; 1.5SMC56A delivers triple the surge capacity but increases leakage and footprint-making P4SMA56H optimal for space-constrained, AEC-Q101–required automotive DC/DC inputs.
Availability
P4SMA56H is available at Aetrix Electronics and suitable for automotive power management, industrial DC/DC converters, LED lighting drivers, and telecom adapter interfaces requiring stable component supply and long-term lifecycle support.
Supply support for P4SMA56H 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 P4SMA56H belongs to TSC's AEC-Q101–qualified P4SMAxH series of surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive power distribution and industrial power conversion systems.
FAQ
What is the clamping voltage of the P4SMA56H under standard surge conditions?
The P4SMA56H has a maximum clamping voltage (VC) of 80.5 V at 5.2 A peak pulse current using the 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ISO 7637-2 standards and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA56H maintains this clamping performance across its full operating temperature range.
Is the P4SMA56H suitable for automotive applications?
Yes, the P4SMA56H is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements and operates reliably from –55°C to +150°C. Its glass-passivated junction and JESD201 Class 2 whisker resistance make it appropriate for engine control units, body electronics, and ADAS power rails-key attributes confirmed in the official Taiwan Semiconductor P4SMA56H datasheet.
What does the "H" suffix indicate in P4SMA56H?
The "H" suffix in P4SMA56H denotes the unidirectional configuration and DO-214AC (SMA) package. It distinguishes the part from bidirectional variants (which use "AH") and confirms compliance with the full P4SMAxH family specifications-including 400W peak pulse power, AEC-Q101 qualification, and ISO 7637-2 compliance. The marking code for P4SMA56H is CHJ, as specified in Taiwan Semiconductor's ordering documentation.
How does the P4SMA56H compare to the P4SMA56AH variant?
The P4SMA56AH is the bidirectional version with tighter VBR tolerance (53.2–58.8 V vs. 50.4–61.6 V) and slightly lower clamping voltage (77.0 V vs. 80.5 V) at 5.4 A. Both share the same DO-214AC package, 400W rating, and AEC-Q101 qualification. The P4SMA56H is selected for DC rail protection where polarity is fixed; P4SMA56AH suits AC-coupled or differential signal lines requiring symmetrical clamping in both directions.
What is the maximum reverse leakage current for the P4SMA56H at its working voltage?
The P4SMA56H exhibits a maximum reverse leakage current (IR) of 1 µA at its working stand-off voltage (VWM) of 45.4 V, measured at 25°C. This ultra-low leakage minimizes quiescent power loss in always-on automotive modules and ensures stable voltage regulation upstream of LDOs or buck controllers. The specification is verified per the manufacturer's electrical test conditions and remains within 5 µA up to +125°C.
P4SMA56H 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56H FAQ
1.How can I place an order for P4SMA56H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56H 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 P4SMA56H reliable?
The price and inventory of P4SMA56H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56H is usually 5 days.
3.What payment methods are accepted for P4SMA56H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56H?
P4SMA56H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56H 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 P4SMA56H?
For technical support, including P4SMA56H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56H requirements.
6.How does Aetrix verify that P4SMA56H is sourced from the original manufacturer or authorized distributors?
All P4SMA56H 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 P4SMA56H meets industry standards.
7.What is the process for return or replacement of P4SMA56H?
All P4SMA56H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56H, 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 P4SMA56H part is unused and in its original packaging.
Return procedure for P4SMA56H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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