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Taiwan Semiconductor Corporation P4SMA39C
- Part No.:
- P4SMA39C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39C.pdf
- Description:
- 400W, 39V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:9,396
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Product details
Overview
P4SMA39C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 35.1–42.9V breakdown voltage (VBR), and 56.4V clamping voltage (VC) at 7.4A peak impulse current under 10/1000μs waveform-designed for ESD and surge protection in DC/DC converters and automotive power modules.
For engineers reviewing the P4SMA39C datasheet, P4SMA39C pinout, P4SMA39C application, or P4SMA39C equivalent, key selection criteria include bidirectional clamping capability, <1.0ps response time, ≤1μA reverse leakage at 31.6V working stand-off voltage, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA39C implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its symmetrical avalanche structure enables identical electrical characteristics in both polarities, with VBR specified at 1.0mA test current and clamping validated per 10/1000μs standard surge waveform.
Thermal performance is defined by a 150°C maximum junction temperature and derating curve per Fig.2, while mechanical robustness includes JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and matte tin-plated leads compliant with J-STD-002 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 35.1V / 42.9V at 1.0mA - defines reliable avalanche initiation range across production lot |
| VWM | 31.6V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 56.4V at 7.4A (10/1000μs) - peak clamped voltage protecting downstream circuitry |
| PPPM | 400W - peak pulse power handling capacity under standardized surge waveform |
| IR @ VWM | ≤1μA - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | 150°C - supports operation in under-hood automotive and industrial power supply environments |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; 0.060g mass; moisture sensitivity level 1 per J-STD-020; RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient current entry point in negative polarity events | Completes symmetrical clamping path during reverse surges; marked end is cathode for unidirectional reference only |
| Cathode (banded end) | Transient current entry point in positive polarity events | Enables bidirectional conduction without external polarity configuration; band denotes terminal orientation per JEDEC DO-214AC standard |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Response time <1.0ps | Clamps transients before propagation into sensitive analog or digital ICs in sub-nanosecond edge-rate systems |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching surge immunity (Pulse 1/2a/2b/3a/3b) |
| Automated placement compatibility | DO-214AC footprint and lead geometry support high-speed pick-and-place with >99.9% placement yield |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of 24V battery-fed control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at input stage to limit voltage excursions to ≤56.4V during ISO 7637-2 Pulse 5a events. Use Value: Prevents MOSFET gate oxide rupture and MCU brown-out by maintaining rail voltage within safe operating area during 100V/100ms surges. | Use Scenario: Input surge suppression in isolated 48V-to-12V telecom DC/DC modules exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Primary transient shunt on primary-side bus, activated within <1ps to divert 7.4A impulse current away from PWM controller. Use Value: Enables use of lower-voltage-rated primary-side FETs (e.g., 60V devices) without derating, reducing BOM cost and conduction losses. |
| LED Driver Power Stages | Smart Building Sensor Nodes |
Use Scenario: Overvoltage protection for constant-current LED drivers subjected to inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: Fast-clamping element across driver output terminals to absorb 400W energy spikes from 24V coil de-energization. Use Value: Eliminates need for snubber RC networks, reducing PCB area by 35% and improving thermal margin in sealed luminaires. | Use Scenario: ESD and surge hardening of 3.3V/5V sensor interface lines (I²C, UART) in HVAC controllers mounted near AC mains wiring. IC Role / Device Role / Timing Role: Bidirectional line protector on data and power rails, leveraging same VC in both directions to preserve signal symmetry. Use Value: Achieves ±15kV contact / ±25kV air IEC 61000-4-2 ESD immunity without compromising rise-time-sensitive sensor timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA (Bourns) | Same DO-214AA package; 36V VWM, 58.1V VC @ 6.9A; 600W rating | Higher power rating suits higher-energy surges but requires larger board area | Select when system-level surge testing exceeds 400W or when legacy SMB layout exists |
| 1.5SMC39C (ON Semiconductor) | DO-214AB package; 39V VWM, 60.0V VC @ 6.7A; 1500W rating | Larger case increases thermal mass but reduces current density per unit area | Choose for high-reliability industrial designs requiring extended surge endurance beyond single-event qualification |
Compared with P4SMA39C, SMBJ36CA offers higher surge margin in same footprint class but with elevated clamping voltage, while 1.5SMC39C delivers triple the peak power at the cost of DO-214AB's 30% larger board area-making P4SMA39C optimal for space-constrained 400W-compliant automotive and telecom front-end protection.
Availability
P4SMA39C is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and smart building sensor node designs requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4SMA39C 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 for industrial and automotive markets.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for ISO 7637-2-compliant transient suppression in space-constrained, high-reliability power conversion and control systems.
FAQ
What does the 'C' suffix indicate in P4SMA39C?
The 'C' suffix in P4SMA39C denotes bidirectional configuration-meaning the device provides symmetrical clamping in both polarities, with identical VBR, VC, and IPPM specifications regardless of voltage polarity. This is confirmed in the datasheet's "Devices for Bipolar Applications" section, which explicitly assigns 'C' or 'CA' suffixes to bidirectional types across the P4SMA6.8–P4SMA200A family. The P4SMA39C thus replaces two unidirectional devices in differential or AC-coupled protection schemes.
Does P4SMA39C meet automotive-grade reliability standards?
Yes, P4SMA39C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive transient immunity, operates from –55°C to +150°C junction temperature, and complies with JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity level 1. While not AEC-Q200 qualified out-of-box, its construction, testing, and thermal specs align with Tier-1 automotive subsystem requirements when validated per customer-specific stress profiles. Taiwan Semiconductor provides full PPAP documentation upon request.
What is the maximum clamping voltage of P4SMA39C under standard surge conditions?
The maximum clamping voltage of P4SMA39C is 56.4V, measured at 7.4A peak impulse current using the standardized 10/1000μs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the upper bound of voltage seen by protected circuitry during worst-case surge events. It is derived directly from the "Maximum clamping voltage VC@IPPM" row in the Electrical Specifications table for P4SMA39C on page 2 of the S2102 datasheet.
Can P4SMA39C be used in place of unidirectional TVS diodes like P4SMA39A?
No-P4SMA39C is bidirectional and cannot substitute for unidirectional P4SMA39A without circuit redesign. The P4SMA39A has an anode/cathode asymmetry enabling forward conduction in one direction only, whereas P4SMA39C clamps equally in both directions. Using P4SMA39C in a unidirectional application may cause unintended current paths or violate biasing requirements. The datasheet explicitly separates unidirectional (no suffix or 'A') and bidirectional ('C' or 'CA') variants due to fundamental structural differences in junction layout and marking.
What is the working stand-off voltage (VWM) of P4SMA39C and why does it matter?
The working stand-off voltage (VWM) of P4SMA39C is 31.6V-the maximum DC or continuous peak voltage the device can withstand without entering avalanche conduction. This parameter ensures reliable operation in 24V automotive or 28V avionics systems where normal operating voltage must remain safely below VWM to prevent leakage-induced power loss or false triggering. Exceeding VWM risks premature conduction, increased IR, and accelerated degradation. The 31.6V value is specified in the Electrical Specifications table and reflects the minimum VWM across production lots.
P4SMA39C 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA39C FAQ
1.How can I place an order for P4SMA39C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39C 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 P4SMA39C reliable?
The price and inventory of P4SMA39C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39C is usually 5 days.
3.What payment methods are accepted for P4SMA39C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39C?
P4SMA39C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39C 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 P4SMA39C?
For technical support, including P4SMA39C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39C requirements.
6.How does Aetrix verify that P4SMA39C is sourced from the original manufacturer or authorized distributors?
All P4SMA39C 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 P4SMA39C meets industry standards.
7.What is the process for return or replacement of P4SMA39C?
All P4SMA39C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39C, 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 P4SMA39C part is unused and in its original packaging.
Return procedure for P4SMA39C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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