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Taiwan Semiconductor Corporation P4SMA82H
- Part No.:
- P4SMA82H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82H.pdf
- Description:
- 400W, 82V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,656
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Product details
Overview
P4SMA82H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with breakdown voltage 73.8–90.2 V at 1 mA, working stand-off voltage 66.4 V, clamping voltage 118 V at 3.5 A (10/1000 µs), and junction temperature range −55 °C to +150 °C. It protects DC/DC converters and automotive power rails against ISO 7637-2 pulses.
For engineers reviewing the P4SMA82H datasheet, P4SMA82H pinout, P4SMA82H application, or P4SMA82H equivalent, key selection criteria include unidirectional polarity, 66.4 V stand-off rating, 118 V clamping under 3.5 A surge, AEC-Q101 qualification, and DO-214AC mechanical compatibility with automated SMT assembly.
Technical Context
The P4SMA82H operates as a unidirectional avalanche diode, activated when reverse voltage exceeds its 73.8–90.2 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1 µA at 66.4 V) and fast response (<1.0 ps), enabling effective suppression of fast transients like ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b.
Thermal derating follows Fig.2: peak pulse power drops linearly above 25 °C ambient, maintaining safe operation up to TJ = 150 °C. The device is rated for non-repetitive 8.3 ms half-sine forward surge current of 40 A and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT | 73.8–90.2 V at 1 mA - defines minimum/maximum voltage at which avalanche conduction begins reliably |
| VWM | 66.4 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 118 V at 3.5 A (10/1000 µs) - clamped voltage during worst-case surge, limiting downstream stress |
| PPPM | 400 W - peak pulse power handling capability per single transient event |
| IR @ VWM | <1 µA - ultra-low leakage preserves efficiency in high-impedance bias networks |
| TJ Range | −55 °C to +150 °C - supports under-hood automotive and industrial environments |
| Package | DO-214AC (SMA) - industry-standard SMT footprint compatible with JEDEC MS-013AC |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode band marking polarity, weight ≈ 0.060 g, UL 94V-0 rated compound, J-STD-002 solderable terminals.
| 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 | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); conducts avalanche current when VLINE > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Ensures stable VBR tolerance and low long-term drift over thermal and operational life |
| Clamping ratio (VC/VBR) | ~1.3–1.4 - tight ratio enables predictable protection margin without overdesign |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow, simplifying SMT production |
| ISO 7637-2 compliance | Validated against all five standard vehicle electrical disturbance waveforms (Pulse 1/2a/2b/3a/3b) |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground, clamping surges within 1.0 ps. Use Value: Withstands 400 W peak pulse and maintains VC ≤ 118 V, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Safeguarding isolated 24 V input stage of telecom DC/DC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 µs surges on primary-side bus. Use Value: 66.4 V VWM allows full utilization of 24 V nominal rail headroom while delivering 118 V clamping at 3.5 A. |
| LED Driver Overvoltage Clamp | Smart Sensor Node ESD Protection |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers due to inductive switching spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output, conducting only during overvoltage events. Use Value: Sub-1 µA leakage at 66.4 V avoids interference with precision current regulation; 118 V clamp limits LED string stress. | Use Scenario: Shielding CAN or LIN transceivers in battery-powered IoT sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on data lines referenced to local ground. Use Value: AEC-Q101 qualification and <1 µA leakage ensure long-term stability in always-on edge nodes without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ80A | DO-214AA (SMB) package, 80 V VWM, 125 V VC @ 3.2 A, same 400 W rating | Larger footprint; higher thermal mass but lower board density | Select SMBJ80A if PCB layout accommodates SMB and higher clamping voltage is acceptable |
| 1.5SMC82A | DO-214AB (SMC) package, 82 V VWM, 135 V VC @ 2.9 A, 1500 W rating | Higher power rating but larger size and higher clamping voltage | Choose 1.5SMC82A only when system requires >400 W single-pulse handling and space permits SMC |
Compared with SMBJ80A and 1.5SMC82A, the P4SMA82H offers optimal balance of compact DO-214AC footprint, precise 66.4 V stand-off, and 118 V clamping-critical for space-constrained automotive and industrial modules where layout density and voltage margin are tightly coupled.
Availability
P4SMA82H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, and LED driver overvoltage clamping requiring stable component supply and AEC-Q101 compliance.
Supply support for P4SMA82H 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, serving automotive, industrial, and consumer markets since 1979.
The P4SMA series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh automotive electrical environments and high-reliability industrial power systems.
FAQ
What is the polarity configuration of the P4SMA82H?
The P4SMA82H is a unidirectional TVS diode, with cathode marked by a band on the DO-214AC package. It conducts in reverse bias above its breakdown voltage and blocks forward current up to 3.5 V. This polarity is confirmed in the "Polarity: As marked" mechanical specification and applies exclusively to the 'H' suffix variant-not the 'AH' version, which is bidirectional.
Does the P4SMA82H meet automotive qualification standards?
Yes, the P4SMA82H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 rating further validate its suitability for automotive under-hood and body-control module applications.
What is the maximum clamping voltage of the P4SMA82H under standard test conditions?
The P4SMA82H has a maximum clamping voltage (VC) of 118 V at 3.5 A peak pulse current using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and appears in the Electrical Specifications table on page 3 of the official datasheet revision A2102.
Can the P4SMA82H be used in bidirectional configurations?
No-the P4SMA82H is strictly unidirectional. For bidirectional operation, Taiwan Semiconductor specifies the P4SMA82AH variant (marked CTJ), which features symmetrical breakdown in both directions. Using P4SMA82H in bidirectional circuits risks asymmetric clamping and potential failure during positive-going transients.
What is the lead finish and solderability specification for the P4SMA82H?
The P4SMA82H uses matte tin-plated leads compliant with J-STD-002 for solderability, and its molding compound meets UL 94V-0 flammability rating. The device is rated MSL Level 1, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without baking.
P4SMA82H 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA82H FAQ
1.How can I place an order for P4SMA82H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82H 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 P4SMA82H reliable?
The price and inventory of P4SMA82H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82H is usually 5 days.
3.What payment methods are accepted for P4SMA82H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82H?
P4SMA82H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82H 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 P4SMA82H?
For technical support, including P4SMA82H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82H requirements.
6.How does Aetrix verify that P4SMA82H is sourced from the original manufacturer or authorized distributors?
All P4SMA82H 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 P4SMA82H meets industry standards.
7.What is the process for return or replacement of P4SMA82H?
All P4SMA82H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82H, 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 P4SMA82H part is unused and in its original packaging.
Return procedure for P4SMA82H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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