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Taiwan Semiconductor Corporation P4SMA8.2C
- Part No.:
- P4SMA8.2C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2C.pdf
- Description:
- 400W, 8.2V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,179
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Product details
Overview
P4SMA8.2C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping fast transients in DC power lines and signal paths. It features a 7.38–9.02 V breakdown voltage (VBR), 6.63 V working stand-off voltage (VWM), 12.5 V maximum clamping voltage (VC) at 33 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - used in automotive power supply protection and industrial I/O interface surge suppression.
For engineers reviewing the P4SMA8.2C datasheet, P4SMA8.2C pinout, P4SMA8.2C application, or P4SMA8.2C equivalent, key selection criteria include bidirectional clamping capability, sub-1 ps response time, <1 µA leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AC thermal derating above 25°C ambient.
Technical Context
The P4SMA8.2C implements a silicon avalanche junction structure with glass passivation for stable breakdown behavior and low leakage. Its bidirectional configuration enables symmetric clamping in AC-coupled or floating signal lines without polarity constraints.
It operates across –55°C to +150°C junction temperature range, supports 40 A non-repetitive forward surge current (IFSM), and maintains clamping performance under repetitive transient stress when thermally managed per Fig.2 derating curve - critical for on-board DC/DC converters exposed to load dump or inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.38 V / 9.02 V at 10 mA test current - defines guaranteed clamping onset window for overvoltage detection |
| VWM | 6.63 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 12.5 V at 33 A (10/1000 µs) - limits downstream component stress during worst-case surge |
| PPPM | 400 W - peak transient energy absorption capacity without failure |
| IR @ VWM | <200 µA - ensures minimal standby power loss in battery-backed systems |
| TJ max | +150 °C - enables operation in high-temperature engine bay or enclosed power supply environments |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound; 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient return path for bidirectional clamping | Connects to protected line; forms symmetrical avalanche junction with cathode |
| Cathode (banded end) | Transient return path for bidirectional clamping | Marked terminal; identical electrical role as anode in P4SMA8.2C due to bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating buses without polarity concerns |
| Fast response time | <1.0 ps - intercepts ESD and lightning-induced transients before IC damage occurs |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - meets automotive EMC requirements |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow - simplifies SMT manufacturing flow |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across input rails to clamp transients to ≤12.5 V. Use Value: Prevents damage to downstream LDOs and microcontrollers during ISO 7637-2 Pulse 5a events up to 400 W. | Use Scenario: Shielding 4–20 mA current loop transmitters from field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground to shunt transients without distorting analog output. Use Value: Maintains signal integrity with <200 µA leakage at 6.63 V, enabling accurate current sourcing down to µA-level precision. |
| LED Driver Input Stage | On-board DC/DC Converter Input |
Use Scenario: Safeguarding constant-current LED drivers in streetlight controllers from grid-side surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp at DC input stage, upstream of bulk capacitor and controller IC. Use Value: 400 W peak power rating absorbs 10/1000 µs transients without degradation, extending driver lifetime in outdoor deployments. | Use Scenario: Input rail protection for isolated 5 V/3.3 V DC/DC modules in programmable logic controllers. IC Role / Device Role / Timing Role: Fast-acting TVS suppressing switching noise and back-EMF from adjacent relay coils. Use Value: Sub-1 ps response ensures clamping initiates before 30 ns propagation delay of typical DC/DC enable signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | 600 W peak power, DO-214AA (SMB) package, 12.0 V clamping at 38.9 A | Higher power handling but larger footprint; requires PCB area increase | Select when system-level surge testing exceeds 400 W or higher IPPM margin is required |
| 1.5KE8.2C | 1500 W peak power, DO-201AE axial lead, 13.4 V clamping at 112 A | Through-hole mounting only; unsuitable for automated SMT assembly | Choose for prototyping or legacy through-hole designs where reflow compatibility is not needed |
Compared with SMBJ8.0CA and 1.5KE8.2C, the P4SMA8.2C offers optimal balance of 400 W surge capacity, DO-214AC compactness, and full ISO 7637-2 compliance - making it preferred for space-constrained automotive and industrial SMT power rails.
Availability
P4SMA8.2C is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface circuits, LED driver input stages, and on-board DC/DC converter inputs requiring stable component supply across production lifecycles.
Supply support for P4SMA8.2C 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 - headquartered in Hsinchu, Taiwan.
The P4SMA8.2C belongs to TSC's P4SMAx series of surface-mount TVS diodes, engineered specifically for robust, automated assembly into automotive and industrial power systems requiring repeatable surge immunity.
FAQ
What is the polarity configuration of P4SMA8.2C?
The P4SMA8.2C is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., P4SMA8.2A), it has no functional anode/cathode distinction - the cathode band marking is retained for mechanical orientation only, not electrical polarity. This allows use in AC-coupled or floating signal paths without concern for installation direction.
Does P4SMA8.2C meet automotive EMC standards?
Yes, the P4SMA8.2C is explicitly rated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load dump), Pulse 2a/2b (supply disconnection and switching transients), and Pulse 3a/3b (capacitive coupling). Its 400 W peak pulse power and 12.5 V clamping voltage at 33 A ensure compliance with Level III and IV test profiles common in body control modules and infotainment power supplies.
What is the maximum junction temperature rating for P4SMA8.2C?
The P4SMA8.2C has a maximum junction temperature (TJ) rating of +150°C, with an operating range from –55°C to +150°C. This enables reliable deployment in under-hood automotive environments and enclosed industrial enclosures. Thermal derating follows Fig.2 in the datasheet: power dissipation decreases linearly above 25°C ambient, reaching ~240 W at +85°C ambient.
How does P4SMA8.2C differ from P4SMA8.2A?
The P4SMA8.2C is bidirectional, while P4SMA8.2A is unidirectional. Key differences include VBR (7.79–8.61 V vs. 7.38–9.02 V), VWM (7.02 V vs. 6.63 V), and clamping voltage (12.1 V vs. 12.5 V at rated IPPM). The C suffix indicates symmetrical breakdown characteristics essential for AC signal protection, whereas the A suffix denotes optimized unidirectional clamping for DC rails with defined polarity.
Is P4SMA8.2C RoHS and halogen-free compliant?
Yes, the P4SMA8.2C is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads satisfy J-STD-002 solderability requirements. Moisture sensitivity level is rated at MSL 1 - no floor life limitation or pre-bake required prior to reflow soldering.
P4SMA8.2C 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA8.2C FAQ
1.How can I place an order for P4SMA8.2C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2C 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 P4SMA8.2C reliable?
The price and inventory of P4SMA8.2C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2C is usually 5 days.
3.What payment methods are accepted for P4SMA8.2C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2C?
P4SMA8.2C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2C 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 P4SMA8.2C?
For technical support, including P4SMA8.2C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2C requirements.
6.How does Aetrix verify that P4SMA8.2C is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2C 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 P4SMA8.2C meets industry standards.
7.What is the process for return or replacement of P4SMA8.2C?
All P4SMA8.2C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2C, 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 P4SMA8.2C part is unused and in its original packaging.
Return procedure for P4SMA8.2C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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