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Taiwan Semiconductor Corporation P4SMA82CAH
- Part No.:
- P4SMA82CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82CAH.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
P4SMA82CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade overvoltage protection in DC power rails and signal lines. It features a 77.9 V to 86.1 V breakdown voltage (VBR), 70.1 V working stand-off voltage (VWM), 113 V maximum clamping voltage (VC) at 3.7 A peak impulse current, and 400 W peak pulse power rating under 10/1000 µs waveform - deployed in switching mode power supplies, on-board DC/DC converters, and lighting systems.
For engineers reviewing the P4SMA82CAH datasheet, P4SMA82CAH pinout, P4SMA82CAH application, or P4SMA82CAH equivalent, this device serves as an AEC-Q101-qualified, DO-214AC-packaged bidirectional TVS with sub-1 ps response time, <1 µA leakage at VWM, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance - critical for robust ESD and load-dump protection in automotive electronics.
Technical Context
The P4SMA82CAH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional configurations. Its clamping behavior is defined by a tightly controlled VBR range (77.9–86.1 V at 1 mA), low temperature coefficient (0.105 %/°C), and stable VC of 113 V at IPPM = 3.7 A under standardized 10/1000 µs surge.
It operates across –55 °C to +150 °C junction temperature, supports 40 A non-repetitive forward surge (IFSM), and maintains <1 µA reverse leakage at rated VWM. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling reliable reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 77.9–86.1 V - ensures precise turn-on threshold for overvoltage events without false triggering during normal operation |
| VWM | 70.1 V - defines maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM = 3.7 A | 113 V - limits downstream circuit voltage during 10/1000 µs transients, protecting ICs with ≤120 V absolute max ratings |
| PPPM | 400 W - sustains high-energy surges per ISO 7637-2 Pulse 5a (load dump) without degradation |
| IR @ VWM | <1 µA - minimizes standby power loss and avoids interference in high-impedance sensing circuits |
| Response Time | <1.0 ps - enables effective suppression of ESD (IEC 61000-4-2) and fast-rising transients |
| TJ Range | –55 °C to +150 °C - supports under-hood automotive deployment and industrial ambient conditions |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads meet J-STD-002 solderability; molding compound complies with UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (reversible) | Bidirectional transient conduction path | Terminals are functionally identical; polarity marking absent - enables placement without orientation check in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS power domains |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees immunity to coupled transients from vehicle battery and alternator networks |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and cycle time |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained supply chains |
Applications
| Automotive Body Control Module (BCM) | Industrial LED Driver Power Input |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails against load dump and jump-start transients in BCMs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDOs and interface ICs to limit rail voltage excursions. Use Value: Clamps to 113 V during 12 V system load dump (ISO 7637-2 Pulse 5a), preventing latch-up or burnout of 120 V-rated regulators. |
Use Scenario: Shields constant-current LED driver ICs from line surges induced by AC/DC adapter coupling or inductive switching noise. IC Role / Device Role / Timing Role: Standoff protector on 48 V DC bus input, absorbing repetitive 400 W pulses without derating. Use Value: Maintains <1 µA leakage at 70.1 V VWM, avoiding efficiency loss in high-efficiency (>92%) drivers. |
| On-Board DC/DC Converter Input | Smart Lighting Fixture Surge Protection |
Use Scenario: Secures primary-side MOSFET gate drivers and controller ICs in 24 V-to-5 V buck converters used in commercial vehicles. IC Role / Device Role / Timing Role: Fast-response shunt clamp parallel to input bulk capacitor, diverting surge energy before it reaches switching node. Use Value: Sub-1 ps response ensures clamping initiates before 10 ns edge rates propagate into sensitive analog feedback paths. |
Use Scenario: Integrated into DALI or 0–10 V dimmable LED fixture PCBs to survive lightning-induced surges on low-voltage control wiring. IC Role / Device Role / Timing Role: Bidirectional transient limiter on secondary-side control interface, referenced to floating ground. Use Value: Symmetrical terminal design eliminates polarity dependency - simplifies automated placement on dual-sided control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | DO-214AA package; 85 V VBR min (85–94.4 V); 600 W PPPM; 125 V VC @ 4.8 A | Higher clamping voltage and larger footprint - suitable where board space allows and tighter VC margin is not required | Select when higher surge energy handling is prioritized over compactness and lower clamping |
| 1.5KE82CA | DO-201AD axial package; same VBR range; 1500 W PPPM; 137 V VC @ 11 A | Through-hole mounting; incompatible with SMT lines; used in legacy industrial power supplies | Choose only for manual assembly or retrofit scenarios where DO-214AC footprint cannot be accommodated |
Compared with SMBJ85CA and 1.5KE82CA, the P4SMA82CAH delivers optimal balance of compact DO-214AC packaging, low 113 V clamping, and AEC-Q101 qualification - making it the preferred choice for new automotive and space-constrained industrial designs requiring automated assembly.
Availability
P4SMA82CAH is available at Aetrix Electronics and suitable for automotive body electronics, industrial LED drivers, and on-board DC/DC converters requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA82CAH 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 P4SMA series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for automotive and industrial environments demanding high reliability, fast transient response, and robust surge immunity.
FAQ
What does the "CAH" suffix indicate in P4SMA82CAH?
The "CAH" suffix denotes a bidirectional configuration (C), automotive qualification (A), and halogen-free construction (H). Unlike unidirectional variants (e.g., P4SMA82AH), the P4SMA82CAH has symmetrical electrical characteristics in both polarities - eliminating polarity marking and enabling flexible PCB placement. This matches ISO 7637-2 requirements for bidirectional transient immunity in vehicle networks.
Is P4SMA82CAH compatible with lead-free reflow soldering processes?
Yes, P4SMA82CAH is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020 Level 1). Its matte tin-plated leads meet J-STD-002 solderability requirements, and the UL 94V-0 molding compound withstands peak temperatures up to 260 °C. No pre-baking is needed due to its MSL-1 rating - supporting high-yield, high-throughput SMT assembly.
How does P4SMA82CAH perform under repeated surge stress?
P4SMA82CAH is rated for non-repetitive surges per Fig.5 (10/1000 µs), with derating above 25 °C per Fig.2. While not specified for repetitive duty, its glass-passivated junction and 150 °C TJMAX enable reliable operation under occasional transients typical in automotive and industrial settings - validated by AEC-Q101 stress testing including 1000 cycles of 8.3 ms half-sine surge.
What is the significance of the 0.105 %/°C temperature coefficient for P4SMA82CAH?
The 0.105 %/°C temperature coefficient of VBR means breakdown voltage increases by ~0.08 V per °C rise across the –55 °C to +150 °C range. This predictable drift ensures consistent clamping performance in under-hood environments, allowing designers to maintain safe margins between VC and downstream IC absolute maximum ratings without overdesigning voltage headroom.
Can P4SMA82CAH replace P4SMA82AH in an existing design?
No - P4SMA82CAH is bidirectional while P4SMA82AH is unidirectional. Swapping them requires verifying circuit topology: P4SMA82AH includes a cathode band and conducts only in reverse bias, whereas P4SMA82CAH clamps equally in both directions. Using P4SMA82CAH in place of P4SMA82AH may cause unintended conduction in forward-biased signal paths unless the application inherently requires symmetry.
P4SMA82CAH 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
P4SMA82CAH FAQ
1.How can I place an order for P4SMA82CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82CAH 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 P4SMA82CAH reliable?
The price and inventory of P4SMA82CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82CAH is usually 5 days.
3.What payment methods are accepted for P4SMA82CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82CAH?
P4SMA82CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82CAH 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 P4SMA82CAH?
For technical support, including P4SMA82CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82CAH requirements.
6.How does Aetrix verify that P4SMA82CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA82CAH 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 P4SMA82CAH meets industry standards.
7.What is the process for return or replacement of P4SMA82CAH?
All P4SMA82CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82CAH, 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 P4SMA82CAH part is unused and in its original packaging.
Return procedure for P4SMA82CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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