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Taiwan Semiconductor Corporation P4SMA82CH
- Part No.:
- P4SMA82CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82CH.pdf
- Description:
- 400W, 82V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:8,177
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Product details
Overview
P4SMA82CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 73.8–90.2V breakdown voltage (VBR), and 118V maximum clamping voltage (VC) at 3.5A peak impulse current - designed to protect automotive-grade DC/DC converters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA82CH datasheet, P4SMA82CH pinout, P4SMA82CH application, or P4SMA82CH equivalent, this device requires attention to bidirectional polarity marking, clamping performance under 10/1000μs surge, AEC-Q101 qualification status, and compatibility with automated SMT placement on high-reliability power rails.
Technical Context
The P4SMA82CH operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities with a typical response time under 1.0ps. Its glass-passivated junction ensures stable VBR tolerance (±5% for standard H version; tighter for AH variant) and low leakage (<1μA at VWM = 66.4V).
It meets ISO 7637-2 immunity requirements for automotive electronics and is rated for continuous operation from –55°C to +150°C junction temperature, with moisture sensitivity level 1 per J-STD-020 - enabling reflow-compatible assembly without dry-pack handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 73.8–90.2V - defines minimum and maximum avalanche initiation threshold under standardized test conditions |
| VWM | 66.4V - maximum continuous reverse working voltage before significant leakage begins |
| VC @ IPPM = 3.5A | 118V - clamped voltage during 10/1000μs surge, limiting downstream circuit stress |
| PPPM | 400W - peak pulse power dissipation capability under standardized 10/1000μs waveform |
| IR @ VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ Range | –55°C to +150°C - supports under-hood and powertrain applications without derating |
| Package | DO-214AC (SMA) - industry-standard SMT outline with cathode band marking and matte tin leads |
Pinout & Package
DO-214AC (SMA) surface-mount package with axial lead configuration: Cathode marked by band on body; anode and cathode terminals are non-polarized for bidirectional operation - terminals accept standard reflow profiles per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge conduction path | Terminals conduct identically in either polarity; no fixed anode/cathode assignment - marked with single cathode band for orientation reference only |
| Case | Thermal and mechanical interface | Plastic body provides UL 94V-0 flammability rating and 0.060g mass; thermal path relies on PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and ESD robustness per stress test plan |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across lifetime and environmental stress |
| Fast response time <1.0ps | Clamps ESD and fast transients before sensitive ICs experience overvoltage damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Provides system-level protection against load dump, inductive switching, and battery disconnect events |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling prior to assembly |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting 12V/24V input rails of buck-derived DC/DC modules in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at converter input filter stage to absorb ISO 7637-2 Pulse 2b (battery interruption) and Pulse 5a (load dump). Use Value: Limits transient voltage to ≤118V, preventing MOSFET gate oxide rupture and controller latch-up while maintaining <1μA leakage at 66.4V nominal rail. | Use Scenario: Safeguarding primary-side rectifier and controller ICs in industrial switch-mode power supplies exposed to line surges and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to shunt 400W 10/1000μs surges before they propagate into PWM controller and gate drivers. Use Value: Delivers 118V clamping at 3.5A with sub-1ps response, reducing required MOV energy rating and minimizing board space versus multi-stage protection. |
| LED Driver Power Input | Automotive Lighting Module |
Use Scenario: Securing constant-current LED driver ICs powered from vehicle battery in headlamp and tail lamp assemblies. IC Role / Device Role / Timing Role: Primary overvoltage protection element placed upstream of input EMI filter to handle repetitive cold-crank and jump-start transients. Use Value: Withstands ≥1000 surges at rated PPPM, maintains VWM = 66.4V to avoid false triggering during 12V nominal operation, and fits DO-214AC footprint for high-density layout. | Use Scenario: Integrated protection in adaptive front-lighting systems (AFS) where LED arrays and motor drivers share common 12V supply. IC Role / Device Role / Timing Role: Bidirectional clamping device co-located with power entry connector to suppress coupled noise from adjacent solenoid actuation and CAN bus transients. Use Value: AEC-Q101 qualification and –55°C to +150°C operation ensure reliability across full automotive ambient range; halogen-free and RoHS-compliant construction meets OEM material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | DO-214AA (SMB) package; 85V standoff; 400W rating; slightly higher VC = 121V at same IPPM | Larger footprint (SMB vs SMA); lower thermal resistance but less dense placement | Select when board space allows larger package and higher clamping margin is acceptable |
| 1.5KE85CA | Through-hole DO-15 package; same 85V VWM; 1500W rating; VC = 123V at 12.3A | Not SMT-compatible; suited for prototyping or legacy through-hole designs | Choose only for manual assembly or retrofit where rework of SMT pads is impractical |
Compared with SMBJ85CA and 1.5KE85CA, the P4SMA82CH offers superior SMT manufacturability in DO-214AC, tighter VBR tolerance (73.8–90.2V vs ±10%), and AEC-Q101 validation - making it the preferred choice for new automotive and high-reliability industrial designs requiring compact, qualified, and repeatable surge suppression.
Availability
P4SMA82CH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switch-mode power supplies, and LED lighting modules requiring stable component supply with AEC-Q101 compliance and full traceability.
Supply support for P4SMA82CH 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, MOSFETs, and automotive-qualified components.
The P4SMA82CH belongs to TSC's P4SMAxH family of AEC-Q101-qualified surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive power distribution and industrial power conversion systems.
FAQ
What does the "CH" suffix indicate in P4SMA82CH?
The "CH" suffix in P4SMA82CH denotes a bidirectional configuration with AEC-Q101 qualification. Unlike unidirectional variants ending in "H", the "CH" version provides symmetrical clamping in both polarities - critical for protecting AC-coupled or floating-rail circuits in automotive and industrial applications. The P4SMA82CH maintains all electrical specs listed for the P4SMA82H series while adding bidirectional capability and automotive stress validation.
Is P4SMA82CH compatible with lead-free reflow soldering processes?
Yes, P4SMA82CH is fully compatible with lead-free reflow soldering. Its DO-214AC (SMA) package features matte tin-plated leads that meet J-STD-002 solderability requirements, and its molding compound complies with UL 94V-0 flammability rating. The device is rated for peak reflow temperatures up to 260°C and has moisture sensitivity level 1 per J-STD-020 - eliminating the need for pre-baking before assembly.
How does P4SMA82CH differ from the "AH" variant (e.g., P4SMA82AH)?
The P4SMA82CH differs from P4SMA82AH in both configuration and specification tightness: P4SMA82CH is bidirectional (CH suffix), whereas P4SMA82AH is unidirectional with tighter VBR tolerance (77.9–86.1V vs 73.8–90.2V). The "AH" variant also specifies lower VC (113V vs 118V) and higher VWM (70.1V vs 66.4V), making it better suited for higher-voltage unidirectional rails where leakage and clamping margin are critical.
Does P4SMA82CH meet ISO 7637-2 Pulse 5a (load dump) requirements?
P4SMA82CH is specified to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b - but not Pulse 5a (load dump), which requires >300V clamping capability and energy handling beyond 400W. Pulse 5a typically demands higher-power devices such as 5.0SMDJ or TP5.0 series. For P4SMA82CH, the 118V clamping voltage and 400W rating make it appropriate for lower-energy transients like switching noise and battery interruption - not sustained load dump events.
Can P4SMA82CH be used in place of a unidirectional TVS like P4SMA82H?
No - P4SMA82CH cannot be used as a direct replacement for unidirectional P4SMA82H without circuit review. While both share identical VBR, VWM, and VC values, the P4SMA82CH is bidirectional and lacks defined anode/cathode polarity. Substituting it in a unidirectional design may cause unintended conduction paths or fail to suppress negative-going transients if the original layout assumes polarity-sensitive placement. Always verify schematic symbol and board marking alignment before interchange.
P4SMA82CH 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):
- 66.4V
- Voltage - Breakdown (Min):
- 73.8V
- Voltage - Clamping (Max) @ Ipp:
- 118V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
P4SMA82CH FAQ
1.How can I place an order for P4SMA82CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82CH 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 P4SMA82CH reliable?
The price and inventory of P4SMA82CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82CH is usually 5 days.
3.What payment methods are accepted for P4SMA82CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82CH?
P4SMA82CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82CH 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 P4SMA82CH?
For technical support, including P4SMA82CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82CH requirements.
6.How does Aetrix verify that P4SMA82CH is sourced from the original manufacturer or authorized distributors?
All P4SMA82CH 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 P4SMA82CH meets industry standards.
7.What is the process for return or replacement of P4SMA82CH?
All P4SMA82CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82CH, 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 P4SMA82CH part is unused and in its original packaging.
Return procedure for P4SMA82CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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