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Taiwan Semiconductor Corporation P4SMA8.2CAH
- Part No.:
- P4SMA8.2CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2CAH.pdf
- Description:
- 400W, 8.2V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,011
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Product details
Overview
P4SMA8.2CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade surge protection in DC power rails and signal lines. It features a working stand-off voltage of 7.02 V, breakdown voltage range of 7.79–8.61 V at 10 mA, clamping voltage of 12.1 V at 34 A (10/1000 µs), AEC-Q101 qualification, and DO-214AC (SMA) package - deployed in on-board DC/DC converters to protect downstream regulators from load dump and ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA8.2CAH datasheet, P4SMA8.2CAH pinout, P4SMA8.2CAH application, or P4SMA8.2CAH equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 compliance, moisture sensitivity level (MSL 1), peak pulse power rating (400 W), and compatibility with automated SMT placement in automotive and industrial power systems.
Technical Context
The P4SMA8.2CAH implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 7.02 V). Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management, supporting robust protection against reverse- and forward-polarity surges per ISO 7637-2.
It operates across –55 °C to +150 °C junction temperature range and is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), making it suitable for high-reliability DC/DC converter input stages where thermal derating and pulse waveform fidelity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.02 V - maximum continuous reverse voltage before significant leakage; sets upper limit for safe operation in 5–6 V rail protection |
| VBR min/max | 7.79 V / 8.61 V at 10 mA - verified breakdown threshold ensures predictable turn-on during transients |
| VC @ IPPM | 12.1 V at 34 A (10/1000 µs) - clamping voltage defines worst-case overvoltage seen by protected ICs |
| PPPM | 400 W - peak pulse power handling capacity determines survivability under standardized surge waveforms |
| IR @ VWM | <1 µA - ultra-low leakage preserves efficiency in always-on power domains |
| TJ max | +150 °C - enables use in under-hood automotive environments without thermal derating penalties |
| MSL | Level 1 (per J-STD-020) - supports unlimited floor life and reflow without baking |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, UL 94V-0 flammability rating, polarity indicated by cathode band (bidirectional function renders band non-polar; used for orientation only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Bidirectional terminal pair | Identical electrical behavior in either direction; band indicates physical orientation for automated placement, not polarity dependency |
| Case | Non-connection | Plastic body provides mechanical support and insulation; no thermal or electrical connection to die |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal and humidity stress |
| Clamping time <1.0 ps | Enables suppression of ESD and fast-rising transients before sensitive circuitry responds |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Guarantees functional immunity to real-world automotive supply-line disturbances including load dump and alternator ripple |
| Halogen-free & RoHS compliant | Complies with environmental regulations for end-of-life disposal and manufacturing safety |
Applications
| Switching Mode Power Supply (SMPS) | On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side synchronous rectifiers against switching-induced voltage spikes and cross-talk. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input/output rails to clamp transient overvoltages before they reach control ICs or power switches. Use Value: Prevents latch-up or permanent damage to PWM controllers and gate drivers operating at 7–12 V nominal rails. | Use Scenario: Input-stage surge suppression in 12 V-to-3.3 V or 5 V automotive DC/DC modules exposed to battery line transients. IC Role / Device Role / Timing Role: Standoff-clamp device connected between VIN and GND to limit peak voltage during ISO 7637-2 Pulse 2b (battery disconnect) events. Use Value: Maintains regulated output stability by limiting input overvoltage to ≤12.1 V, within absolute maximum ratings of downstream buck controller ICs. |
| Lighting Application | Adapters |
Use Scenario: Overvoltage protection in LED driver circuits for automotive exterior lighting subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across LED string input terminals to absorb energy from inductive kickback and supply surges. Use Value: Extends LED module lifetime by preventing voltage overshoot beyond 12.1 V that would otherwise degrade phosphor layers or driver FETs. | Use Scenario: Secondary-side transient suppression in AC/DC wall adapters powering industrial sensors or IoT edge devices. IC Role / Device Role / Timing Role: Final-stage protection device located after bulk capacitance to suppress residual ringing and EFT bursts entering via USB or barrel-jack inputs. Use Value: Ensures adapter output remains within ±5% regulation window during 4 kV EFT testing per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | 600 W peak power, SMB package (larger footprint), VWM = 6.8 V, VC = 12.7 V @ 42.1 A | Higher power margin but requires PCB area increase; better suited for higher-energy transients in industrial SMPS | Select when system-level surge testing exceeds 400 W or board layout allows SMB footprint |
| 1.5KE8.2CA | Through-hole TO-204AA (DO-41), 1500 W peak power, VWM = 7.02 V, VC = 12.3 V @ 122 A | Not SMT-compatible; used in legacy or high-power prototyping where manual assembly is acceptable | Choose only for through-hole designs or when 1.5 kW surge headroom is mandatory and rework tolerance exists |
Compared with SMBJ8.0CA and 1.5KE8.2CA, the P4SMA8.2CAH delivers optimal balance of AEC-Q101 compliance, MSL-1 manufacturability, and 400 W surge capability in the compact DO-214AC footprint - making it the preferred choice for space-constrained, high-volume automotive DC/DC modules requiring zero-bake SMT processing.
Availability
P4SMA8.2CAH is available at Aetrix Electronics and suitable for automotive power conversion, industrial DC/DC modules, and LED lighting systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA8.2CAH 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 was developed specifically for automotive and industrial surface-mount surge protection, emphasizing high-reliability packaging, fast clamping response, and compliance with ISO 7637-2 and AEC-Q101 stress standards.
FAQ
What is the clamping voltage of the P4SMA8.2CAH under standard 10/1000 µs surge conditions?
The P4SMA8.2CAH has a maximum clamping voltage (VC) of 12.1 V when subjected to a 34 A peak impulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry will not experience voltage excursions beyond this threshold during standardized surge events - a critical parameter for safeguarding 3.3 V or 5 V logic interfaces in automotive ECUs.
Is the P4SMA8.2CAH suitable for automotive applications requiring AEC-Q101 certification?
Yes, the P4SMA8.2CAH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing (uHAST), confirming its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and vibration stress is mandatory.
How does the bidirectional configuration of the P4SMA8.2CAH affect its circuit implementation?
The P4SMA8.2CAH's bidirectional design means it provides identical clamping behavior regardless of voltage polarity - eliminating the need for polarity-aware placement or additional series components. In practice, this simplifies layout for differential bus protection (e.g., CAN transceiver power rails) and allows single-device protection of floating or AC-coupled nodes without risk of reverse breakdown failure.
What is the moisture sensitivity level (MSL) rating for the P4SMA8.2CAH, and how does it impact manufacturing?
The P4SMA8.2CAH carries an MSL Level 1 rating per J-STD-020, meaning it has unlimited floor life and can be mounted directly after removal from sealed packaging without baking. This eliminates moisture-related popcorning risks during reflow, reduces process overhead, and supports high-throughput automated SMT lines - especially valuable in Tier-1 automotive electronics manufacturing.
Does the P4SMA8.2CAH meet ISO 7637-2 Pulse 2b requirements for automotive battery line protection?
Yes, the P4SMA8.2CAH is specified to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its 400 W peak pulse power rating and 12.1 V clamping voltage ensure compliance with Pulse 2b (inductive load disconnect), where up to –100 V transients occur - enabling reliable protection of 12 V DC/DC converters without additional passive filtering or crowbar circuits.
P4SMA8.2CAH 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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
P4SMA8.2CAH FAQ
1.How can I place an order for P4SMA8.2CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2CAH 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 P4SMA8.2CAH reliable?
The price and inventory of P4SMA8.2CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2CAH is usually 5 days.
3.What payment methods are accepted for P4SMA8.2CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2CAH?
P4SMA8.2CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2CAH 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 P4SMA8.2CAH?
For technical support, including P4SMA8.2CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2CAH requirements.
6.How does Aetrix verify that P4SMA8.2CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2CAH 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 P4SMA8.2CAH meets industry standards.
7.What is the process for return or replacement of P4SMA8.2CAH?
All P4SMA8.2CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2CAH, 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 P4SMA8.2CAH part is unused and in its original packaging.
Return procedure for P4SMA8.2CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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