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Taiwan Semiconductor Corporation P4SMA8.2CH
- Part No.:
- P4SMA8.2CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2CH.pdf
- Description:
- 400W, 8.2V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
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Product details
Overview
P4SMA8.2CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 8.2V nominal breakdown voltage (7.38–9.02V), and clamping voltage of 12.5V at 33A peak impulse current under 10/1000μs waveform. It serves as primary overvoltage protection in DC/DC converters and automotive power rails.
For engineers reviewing the P4SMA8.2CH datasheet, P4SMA8.2CH pinout, P4SMA8.2CH application, or P4SMA8.2CH equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, leakage current at operating bias (<1μA @ 6.63V), AEC-Q101 qualification, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive transients.
Technical Context
The P4SMA8.2CH employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps) and low capacitance, enabling effective suppression of ESD and load-dump events without signal distortion. Its unidirectional configuration provides reverse-biased clamping only, with forward conduction limited to 3.5V at 25A surge.
Designed for surface-mount assembly on high-reliability PCBs, it operates across –55°C to +150°C junction temperature range and meets J-STD-020 moisture sensitivity level 1. Polarity is marked by cathode band; terminals are matte tin-plated for reliable solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.38V / 9.02V at 10mA test current - defines minimum and maximum guaranteed breakdown threshold for design margining |
| VWM | 6.63V - maximum continuous reverse working voltage before significant leakage begins |
| IR @ VWM | <1μA - ensures negligible standby power loss and minimal impact on high-impedance sensing nodes |
| VC @ IPPM | 12.5V at 33A (10/1000μs) - clamping voltage that determines maximum stress on downstream ICs during surge |
| PPPM | 400W - peak pulse power handling capacity under standardized surge waveform |
| TJ max | +150°C - enables operation in under-hood automotive environments and thermally constrained power modules |
| Package | DO-214AC (SMA) - industry-standard SMD outline with 0.060g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with axial leads formed into gull-wing shape; cathode indicated by band; overall dimensions 4.5 × 2.7 × 2.1 mm (L × W × H); weight ≈ 0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connects to protected line (e.g., 12V rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per stress test requirements |
| Clamping voltage ≤12.5V | Ensures protected 5V/3.3V logic interfaces remain within absolute maximum ratings during ISO 7637-2 Pulse 2b (inductive switch-off) |
| Leakage <1μA @ 6.63V | Preserves battery life in always-on vehicle modules and avoids false triggering in high-impedance monitoring circuits |
| Fast response <1.0ps | Responds before ESD or lightning-induced transients propagate through PCB traces, minimizing voltage overshoot |
| Moisture sensitivity level 1 | Eliminates need for dry-pack or baking prior to reflow, reducing manufacturing cost and process complexity |
Applications
| Automotive Power Rail Protection | On-Board DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before they reach regulator ICs. Use Value: Clamps 12V rail to ≤12.5V during 400W surges, preventing damage to downstream LDOs and microcontrollers rated for 16V absolute max. | Use Scenario: Safeguarding buck converter input stage in ADAS camera modules exposed to conducted noise from motor drivers. IC Role / Device Role / Timing Role: Primary surge suppression device upstream of input EMI filter and switching controller. Use Value: Limits transient energy entering power stage with <1.0ps response, preserving MOSFET gate oxide integrity and avoiding false shutdowns. |
| Industrial SMPS Input Stage | LED Driver Power Input |
Use Scenario: Input protection for 24V industrial switch-mode power supplies subjected to long-line inductive switching noise. IC Role / Device Role / Timing Role: First-line defense against repetitive 10/1000μs surges on AC-DC rectified bus. Use Value: Withstands 400W non-repetitive pulses and maintains <1μA leakage at 20V derated working voltage, ensuring stable no-load regulation. | Use Scenario: Overvoltage guard for constant-current LED drivers powered from 12V vehicle systems with PWM dimming. IC Role / Device Role / Timing Role: Clamp element across input terminals to absorb ignition coil coupling and relay bounce spikes. Use Value: 12.5V clamping prevents latch-up in driver ICs while its DO-214AC footprint allows placement near connector entry points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | DO-214AA (SMB) package; 8.0V VWM; 12.0V VC @ 32.4A; same 400W rating | Larger footprint (4.58×3.94mm vs. 4.5×2.7mm); higher thermal mass but less space-efficient | Select when board layout allows SMB size and tighter clamping voltage margin is required |
| 1.5KE8.2C | Through-hole DO-15 package; 8.2V VBR; 13.4V VC @ 29.9A; 1500W rating | Not surface-mountable; higher peak power but incompatible with automated SMT lines | Choose only for legacy through-hole designs or where manual assembly and higher surge tolerance justify larger form factor |
Compared with SMBJ8.0A and 1.5KE8.2C, the P4SMA8.2CH offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 12.5V clamping-making it preferred for new automotive and space-constrained industrial SMT designs requiring certified reliability.
Availability
P4SMA8.2CH is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and LED lighting systems requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA8.2CH 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, and rectifiers with global distribution and AEC-Q101 validation capability.
The P4SMA8.2CH belongs to TSC's P4SMAxH family of surface-mount TVS diodes engineered specifically for robust transient immunity in automotive and industrial power systems where space, reliability, and standard-compliant surge performance are critical.
FAQ
What is the polarity configuration of the P4SMA8.2CH?
The P4SMA8.2CH is a unidirectional TVS diode, meaning it clamps only in reverse bias and conducts forward current like a standard diode. Cathode is marked by a band on the DO-214AC body; anode connects to ground or lower potential. It is not suitable for bidirectional surge suppression unless paired with a complementary device.
Does the P4SMA8.2CH meet automotive qualification standards?
Yes, the P4SMA8.2CH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. This certification covers temperature cycling, humidity resistance, and mechanical robustness needed for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of the P4SMA8.2CH under surge conditions?
The P4SMA8.2CH has a maximum clamping voltage (VC) of 12.5V at 33A peak impulse current using the standardized 10/1000μs double-exponential waveform. This value is guaranteed across temperature and represents the highest voltage seen on the protected line during worst-case transient events.
Can the P4SMA8.2CH be used in bidirectional applications?
No - the P4SMA8.2CH is unidirectional. For bidirectional protection, Taiwan Semiconductor offers the P4SMA8.2AH variant (with "AH" suffix), which features symmetrical breakdown in both directions and uses CH/CAH marking convention. Using P4SMA8.2CH in reverse-biased AC paths may cause permanent failure.
What is the leakage current specification for the P4SMA8.2CH at its working voltage?
The P4SMA8.2CH exhibits maximum reverse leakage current (IR) of 1μA when biased at its working stand-off voltage (VWM) of 6.63V. This ultra-low leakage supports energy-sensitive applications such as always-on automotive modules and battery-powered sensors without compromising standby current budgets.
P4SMA8.2CH 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA8.2CH FAQ
1.How can I place an order for P4SMA8.2CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2CH 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 P4SMA8.2CH reliable?
The price and inventory of P4SMA8.2CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2CH is usually 5 days.
3.What payment methods are accepted for P4SMA8.2CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2CH?
P4SMA8.2CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2CH 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 P4SMA8.2CH?
For technical support, including P4SMA8.2CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2CH requirements.
6.How does Aetrix verify that P4SMA8.2CH is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2CH 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 P4SMA8.2CH meets industry standards.
7.What is the process for return or replacement of P4SMA8.2CH?
All P4SMA8.2CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2CH, 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 P4SMA8.2CH part is unused and in its original packaging.
Return procedure for P4SMA8.2CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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