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Taiwan Semiconductor Corporation P4SMA8.2H
- Part No.:
- P4SMA8.2H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2H.pdf
- Description:
- 400W, 8.2V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,405
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Product details
Overview
P4SMA8.2H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 7.38–9.02 V breakdown voltage (VBR), 6.63 V working stand-off voltage (VWM), 12.5 V clamping voltage (VC) at 33 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive-grade SMPS and on-board DC/DC converters.
For engineers reviewing the P4SMA8.2H datasheet, P4SMA8.2H pinout, P4SMA8.2H application, or P4SMA8.2H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, moisture sensitivity level 1 compliance, and unidirectional polarity marking for reliable board-level surge immunity design.
Technical Context
The P4SMA8.2H operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and low leakage (<200 µA at VWM). Its clamping behavior follows standardized 10/1000 µs double-exponential surge waveform per ANSI/IEEE C62.35, delivering predictable VC = 12.5 V at IPPM = 33 A.
Thermal derating begins above 25°C ambient per Fig.2, with maximum junction temperature of 150°C and storage range from –55°C to +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 10 mA | 7.38–9.02 V: Ensures reliable avalanche initiation within defined tolerance before clamping onset |
| VWM | 6.63 V: Maximum continuous reverse voltage without significant leakage - sets safe operating margin below VBR |
| VC @ IPPM = 33 A | 12.5 V: Clamped voltage during 10/1000 µs surge - limits downstream IC stress in protected rail |
| PPPM | 400 W: Peak pulse power handling capability - supports robust transient suppression in automotive and industrial environments |
| IR @ VWM | <200 µA: Low reverse leakage preserves efficiency in standby and low-power modes |
| TJ max | +150°C: Enables operation in under-hood or enclosed power supply environments without thermal shutdown |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line (e.g., GND or return path) |
| Cathode (banded end) | Avalanche clamping terminal | Connected to higher-potential side (e.g., +VIN rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and infotainment power rails |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive downstream circuitry sustains damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with automotive load-dump and inductive-switching immunity test standards |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling - reduces manufacturing overhead |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protects primary-side MOSFET gate drivers and secondary-side rectifiers against switching spikes and input surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input capacitor or across MOSFET drain-source to clamp inductive kickback. Use Value: Limits VDS stress to <12.5 V during 400 W transients, preventing MOSFET avalanche failure and ensuring >100,000-cycle reliability. | Use Scenario: Shields 12 V-to-5 V/3.3 V buck converter ICs from battery line transients during cold-crank or load dump. IC Role / Device Role / Timing Role: Mounted at DC/DC input rail, between battery feed and input filter capacitor. Use Value: Clamps ISO 7637-2 Pulse 2b (50 V/100 ms) to ≤12.5 V, keeping converter enable pin and internal LDOs within absolute maximum ratings. |
| LED Driver Power Input | Industrial Sensor Interface Protection |
Use Scenario: Guards constant-current LED driver ICs against voltage reversals and ESD events during hot-plug connection. IC Role / Device Role / Timing Role: Placed anode-to-ground, cathode-to-LED supply rail to suppress negative transients and positive surges. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) and maintains VWM = 6.63 V to avoid false triggering during normal 7–9 V LED bus operation. | Use Scenario: Protects analog front-end (AFE) inputs of 4–20 mA loop-powered sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Connected in series with sensor supply line, oriented to clamp reverse polarity and forward overvoltage. Use Value: Limits transient energy to <400 W while maintaining leakage <200 µA - preserving loop accuracy and avoiding offset drift in precision amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | DO-214AA (SMB) package; 8.0 V nominal VWM; 12.5 V VC @ 32.1 A; 600 W PPPM | Higher power rating but larger footprint; requires PCB layout change | Select when higher surge margin is needed and SMA footprint constraint is relaxed |
| 1.5SMC8.2A | DO-214AB (SMC) package; 8.2 V VWM; 13.4 V VC @ 30.6 A; 1500 W PPPM | Three times peak power; not AEC-Q101 qualified; higher VC increases protected IC stress | Choose for non-automotive industrial systems requiring higher single-event energy absorption |
Compared with SMBJ8.0A and 1.5SMC8.2A, the P4SMA8.2H offers optimal balance of AEC-Q101 compliance, DO-214AC space efficiency, and precise 12.5 V clamping - making it preferred for compact, automotive-qualified DC/DC and SMPS designs where layout area and qualification rigor are critical.
Availability
P4SMA8.2H is available at Aetrix Electronics and suitable for automotive power conversion, industrial sensor interfaces, and LED lighting systems requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA8.2H 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, with global distribution and AEC-Q101 validation capabilities.
The P4SMA series is engineered for high-reliability transient suppression in automotive and industrial power systems, emphasizing low clamping voltage, fast response, and robust packaging for automated SMT assembly.
FAQ
What is the clamping voltage of the P4SMA8.2H under standard surge conditions?
The P4SMA8.2H has a maximum clamping voltage (VC) of 12.5 V at 33 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected ICs - critical for safeguarding 5 V and 3.3 V logic rails in automotive and industrial applications where the P4SMA8.2H is commonly deployed.
Is the P4SMA8.2H suitable for automotive applications?
Yes, the P4SMA8.2H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its DO-214AC package, moisture sensitivity level 1 rating, and guaranteed performance from –55°C to +150°C make it appropriate for under-hood and body-control module power protection - confirming its suitability for automotive deployment alongside other qualified components in the same system as the P4SMA8.2H.
What does the "H" suffix indicate in P4SMA8.2H?
The "H" suffix in P4SMA8.2H denotes the unidirectional configuration - meaning the device functions as a single-polarity TVS diode with cathode band marking for correct orientation on PCB. This distinguishes it from bidirectional variants (e.g., P4SMA8.2AH), which omit polarity dependence and are marked with "AH". The P4SMA8.2H must be installed with cathode toward the protected high-side rail to ensure proper clamping action.
How does the P4SMA8.2H compare to the P4SMA8.2AH variant?
The P4SMA8.2H is unidirectional with VWM = 6.63 V and IR < 200 µA, while the P4SMA8.2AH is bidirectional with VWM = 7.02 V and IR < 200 µA. Their breakdown ranges differ slightly (P4SMA8.2H: 7.38–9.02 V; P4SMA8.2AH: 7.79–8.61 V), and only the AH version supports symmetrical clamping in AC or reversible DC lines. For standard DC rail protection, the P4SMA8.2H remains the preferred choice due to tighter VBR tolerance and optimized unidirectional performance.
What is the maximum junction temperature rating for the P4SMA8.2H?
The P4SMA8.2H has a maximum junction temperature (TJ) rating of +150°C, with a specified operating range from –55°C to +150°C. This allows reliable operation in high-temperature environments such as engine compartments or enclosed power supplies - provided PCB copper area and airflow meet thermal derating guidelines shown in Fig.2 of the official TSC datasheet for the P4SMA8.2H.
P4SMA8.2H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.63V
- Voltage - Breakdown (Min):
- 7.38V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
P4SMA8.2H FAQ
1.How can I place an order for P4SMA8.2H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2H 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 P4SMA8.2H reliable?
The price and inventory of P4SMA8.2H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2H is usually 5 days.
3.What payment methods are accepted for P4SMA8.2H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2H?
P4SMA8.2H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2H 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 P4SMA8.2H?
For technical support, including P4SMA8.2H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2H requirements.
6.How does Aetrix verify that P4SMA8.2H is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2H 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 P4SMA8.2H meets industry standards.
7.What is the process for return or replacement of P4SMA8.2H?
All P4SMA8.2H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2H, 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 P4SMA8.2H part is unused and in its original packaging.
Return procedure for P4SMA8.2H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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