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Taiwan Semiconductor Corporation P4SMA8.2AH
- Part No.:
- P4SMA8.2AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2AH.pdf
- Description:
- 400W, 8.2V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,048
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Product details
Overview
P4SMA8.2AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, with breakdown voltage 7.79–8.61V at 10mA test current, working stand-off voltage 7.02V, and clamping voltage 12.1V at 34A peak impulse current. It protects DC/DC converters and automotive power supplies against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA8.2AH datasheet, P4SMA8.2AH pinout, P4SMA8.2AH application, or P4SMA8.2AH equivalent, key selection criteria include its AEC-Q101 qualification, 12.1V clamping performance at 34A, <1μA leakage at 7.02V, glass-passivated junction, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA8.2AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 7.79–8.61V breakdown range. Its fast response time (<1.0ps) enables suppression of nanosecond-scale transients, while its 150°C maximum junction temperature supports under-hood automotive environments.
Designed for single-die, unidirectional surge protection, it complies with ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (switching noise), with moisture sensitivity level 1 per J-STD-020 and RoHS/halogen-free construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT | 7.79–8.61 V at 10 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 7.02 V - maximum continuous reverse operating voltage without significant leakage |
| IR @ VWM | <1 μA - ensures minimal standby power loss and signal integrity in low-current bias networks |
| VC @ IPPM | 12.1 V at 34 A (10/1000 μs) - clamping voltage limiting downstream circuit stress during surge events |
| PPPM | 400 W - peak pulse power handling capacity per single non-repetitive transient |
| TJ max | +150 °C - enables operation in high-temperature automotive and industrial power modules |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode band marking polarity, 0.060 g weight, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); conducts during overvoltage to clamp voltage to ≤12.1V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal and humidity stress |
| Fast response time | <1.0 ps - ensures clamping activation before transient energy couples into sensitive ICs |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (line noise) immunity requirements |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - supports standard SMT assembly without preconditioning |
Applications
| Automotive Power Distribution | On-board DC/DC Converters |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed at input stage to clamp surges before they reach buck controller ICs and gate drivers. Use Value: Limits voltage to ≤12.1V during 34A transients, preventing damage to 16V-rated input capacitors and MOSFETs in power stages. | Use Scenario: Safeguarding isolated 5V/3.3V outputs of automotive DC/DC modules from coupled noise and backfeed spikes. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated output rails to absorb reflected transients from connected sensors or actuators. Use Value: Maintains output regulation integrity by clamping overshoot within ±0.5V of nominal, avoiding brownout resets in microcontrollers. |
| Industrial SMPS Inputs | LED Driver Power Stages |
Use Scenario: Input protection for 24V/48V industrial switch-mode power supplies exposed to relay switching and motor drive noise. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor inputs to absorb repetitive 400W pulses without degradation. Use Value: Withstands ≥1000 surges at rated PPPM, extending mean time between failures in factory automation equipment. | Use Scenario: Surge suppression on constant-current LED driver outputs subjected to cable disconnect transients and ESD events. IC Role / Device Role / Timing Role: Output-stage TVS to protect LED string anodes from reverse polarity faults and hot-plug spikes. Use Value: Clamps reverse voltage to ≤12.1V, preventing catastrophic failure of series-connected LEDs rated for 10V reverse standoff. |
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 @ 32.1A; same 400W rating | Larger footprint (SMB vs SMA); slightly lower clamping voltage but higher thermal mass | Select when board space allows larger package and higher thermal inertia is preferred |
| 1.5SMC8.2A | DO-214AB (SMC) package; 8.2V VWM, 12.3V VC @ 32.5A; 1500W rating (not 400W) | Higher power rating and larger body; not drop-in due to different pad layout and surge capability | Choose only when system-level surge requirements exceed 400W and PCB layout permits SMC footprint |
Compared with SMBJ8.0A and 1.5SMC8.2A, the P4SMA8.2AH offers optimal balance of compact DO-214AC size, AEC-Q101 qualification, and precise 7.02V working voltage-making it ideal for space-constrained automotive modules where strict VWM margin and qualification compliance are mandatory.
Availability
P4SMA8.2AH is available at Aetrix Electronics and suitable for automotive power distribution, on-board DC/DC converters, and industrial SMPS inputs requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA8.2AH 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, and power devices since 1979.
The P4SMA8.2AH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series, engineered specifically for robust transient suppression in automotive and industrial power systems where reliability under harsh electrical and thermal conditions is critical.
FAQ
What is the maximum clamping voltage of the P4SMA8.2AH under standard test conditions?
The P4SMA8.2AH has a maximum clamping voltage (VC) of 12.1 V when subjected to a 10/1000 μs waveform peak impulse current of 34 A. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during surge events, directly protecting downstream components rated for ≤13.2V absolute maximum.
Is the P4SMA8.2AH suitable for bidirectional transient suppression?
No, the P4SMA8.2AH is a unidirectional TVS diode. For bidirectional applications, Taiwan Semiconductor specifies parts with "CH" or "CAH" suffixes (e.g., P4SMA8.2CH). Using P4SMA8.2AH in reverse-biased AC configurations risks permanent failure due to lack of symmetrical avalanche characteristics.
Does the P4SMA8.2AH require baking before reflow soldering?
No, the P4SMA8.2AH has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions and placed directly into reflow without pre-baking. This eliminates process steps and reduces risk of popcorn cracking during assembly.
How does the P4SMA8.2AH compare to the P4SMA8.2H variant?
The P4SMA8.2AH has tighter breakdown voltage tolerance (7.79–8.61 V) versus P4SMA8.2H (7.38–9.02 V), lower leakage (<1 μA vs 200 μA at VWM), and improved temperature coefficient (0.065 %/°C). These enhancements make P4SMA8.2AH preferable in precision power rails where low leakage and stable VBR are critical.
What international standards does the P4SMA8.2AH meet for automotive applications?
The P4SMA8.2AH meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling and switching noise), and is AEC-Q101 qualified for stress tests including HTGB, H3TRB, and temperature cycling-ensuring suitability for under-hood and powertrain control units.
P4SMA8.2AH 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):
- 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)
P4SMA8.2AH FAQ
1.How can I place an order for P4SMA8.2AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2AH 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 P4SMA8.2AH reliable?
The price and inventory of P4SMA8.2AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2AH is usually 5 days.
3.What payment methods are accepted for P4SMA8.2AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2AH?
P4SMA8.2AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2AH 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 P4SMA8.2AH?
For technical support, including P4SMA8.2AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2AH requirements.
6.How does Aetrix verify that P4SMA8.2AH is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2AH 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 P4SMA8.2AH meets industry standards.
7.What is the process for return or replacement of P4SMA8.2AH?
All P4SMA8.2AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2AH, 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 P4SMA8.2AH part is unused and in its original packaging.
Return procedure for P4SMA8.2AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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