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Vishay General Semiconductor - Diodes Division P4SMA39A-M3/5A
- Part No.:
- P4SMA39A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39A-M3/5A.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA39A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on power and signal lines. It features a 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA39A-M3/5A datasheet, P4SMA39A-M3/5A pinout, P4SMA39A-M3/5A application, or P4SMA39A-M3/5A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, SMA (DO-214AC) package compatibility, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA39A-M3/5A operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to suppress transient overvoltages induced by inductive switching or ESD events. Its clamping behavior is defined by a well-controlled VC/IPPM relationship under standardized 10/1000 µs pulses.
Thermally, it is rated for junction temperatures from –65 °C to +150 °C, with RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads for full 400 W pulse rating. The M3 suffix confirms halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working margin. |
| VBR @ IT = 1 mA | 37.1–41.0 V - Breakdown onset range; ensures reliable avalanche conduction onset within specification tolerance. |
| VC @ IPPM = 7.4 A | 53.9 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); enables robust protection against common lightning and inductive-switching transients. |
| IFSM | 40 A - Non-repetitive forward surge current (8.3 ms half-sine); supports temporary fault-current exposure without failure. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs PCB pad layout requirements for thermal derating above 25 °C ambient. |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking; compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, M3 suffix indicating halogen-free and RoHS-compliant construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional TVS configuration; forms clamping loop with cathode. |
| Cathode | Transient voltage clamp node | Marked with band; connected to line being protected (e.g., VCC, signal trace); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients common in automotive load-dump and industrial motor-drive environments. |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
| AEC-Q101 qualified option available | Confirms suitability for automotive electronic control units when ordered with HE3/HM3 suffix variants. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive CMOS inputs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against voltage spikes from relay coil de-energization and brush-commutator arcing. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients within 1 ns to limit stress on 3.3 V/5 V logic interfaces. Use Value: Prevents latch-up or permanent damage to MCU GPIOs and gate drivers by limiting transient voltage to ≤53.9 V during 7.4 A surges. |
Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines from battery dump and jump-start surges in vehicle body electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators, activated only during >33.3 V events. Use Value: Maintains system uptime by absorbing 400 W surges without degradation, meeting ISO 7637-2 Pulse 1/2a/5a immunity requirements. |
| Consumer Power Adapters | Industrial PLC I/O Modules |
|
Use Scenario: Secondary-side overvoltage suppression on USB-C PD and AC/DC adapter outputs exposed to capacitor discharge or feedback-loop faults. IC Role / Device Role / Timing Role: Fast-clamping device across output rails, triggered only during abnormal overvoltage conditions beyond normal regulation window. Use Value: Limits output voltage excursion to 53.9 V during fault, preventing damage to connected devices while maintaining CE/UL safety certification margins. |
Use Scenario: Input protection for 24 V digital input cards receiving signals from field sensors subject to cable-induced surges and ESD. IC Role / Device Role / Timing Role: Front-end transient suppressor on each channel, placed before optocoupler or Schmitt trigger input stage. Use Value: Enables >20 kV ESD contact immunity and 1 kV/µs surge withstand per IEC 61000-4-4, reducing false triggering and field returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (Bourns) | Higher VWM = 36 V, VC = 58.1 V at 6.9 A, same SMA package but 600 W PPPM. | Better suited for 36 V nominal systems; higher clamping voltage reduces protection margin for 3.3 V/5 V logic. | Select when system nominal voltage is ≥36 V and higher surge energy handling is required. |
| 1.5SMC39A (ON Semiconductor) | Same VWM = 33.3 V, VC = 53.3 V at 7.5 A, but in larger SMC (DO-214AB) package with RθJA = 60 °C/W. | Lower thermal resistance allows higher duty-cycle operation; requires larger PCB footprint. | Choose for thermally constrained designs needing extended surge repetition capability or legacy SMC footprint compatibility. |
Compared with SMBJ36A and 1.5SMC39A, the P4SMA39A-M3/5A offers optimal balance of compact SMA footprint, precise 33.3 V standoff, and 53.9 V clamping - making it ideal for space-constrained 24 V industrial and automotive modules where board area and clamping accuracy are critical.
Availability
P4SMA39A-M3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, halogen-free compliance, and AEC-Q101-ready qualification path.
Supply support for P4SMA39A-M3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific validation.
The P4SMA series is engineered for cost-effective, high-volume transient suppression in consumer, industrial, and automotive electronics - prioritizing fast response, repeatable clamping, and robust SMT manufacturability in the SMA package.
FAQ
What is the standoff voltage rating of the P4SMA39A-M3/5A?
The P4SMA39A-M3/5A has a maximum standoff voltage (VWM) of 33.3 V, meaning it remains non-conductive under continuous reverse bias up to this level with leakage current ≤1.0 µA. This value is critical for ensuring the device does not interfere with normal circuit operation while remaining ready to clamp transients exceeding this threshold. The P4SMA39A-M3/5A maintains this rating across its full operating temperature range.
How does the P4SMA39A-M3/5A differ from bidirectional variants like P4SMA39CA?
The P4SMA39A-M3/5A is unidirectional and features a cathode band marking for polarity-sensitive placement, whereas P4SMA39CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The P4SMA39A-M3/5A is intended for DC-biased lines (e.g., power rails), while P4SMA39CA suits AC-coupled or floating signal paths. Their VBR and VC values also differ due to distinct test configurations.
What is the maximum clamping voltage of the P4SMA39A-M3/5A under surge conditions?
The P4SMA39A-M3/5A exhibits a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 µs surge waveform with peak current (IPPM) of 7.4 A. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is measured under standardized test conditions per JEDEC standards. The P4SMA39A-M3/5A achieves this clamping performance while maintaining low incremental resistance.
Is the P4SMA39A-M3/5A suitable for automotive applications?
The P4SMA39A-M3/5A itself is commercial-grade (M3 suffix), but the P4SMA39AHE3_A and P4SMA39AHM3_A variants are AEC-Q101 qualified for automotive use. While the P4SMA39A-M3/5A shares identical electrical and thermal specs, it lacks formal automotive qualification documentation and stress-test validation. For production automotive ECUs, specify the HE3 or HM3 automotive-grade ordering codes instead of P4SMA39A-M3/5A.
What PCB layout guidance applies to the P4SMA39A-M3/5A for full 400 W rating?
To achieve the full 400 W peak pulse power rating, the P4SMA39A-M3/5A must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's datasheet Fig. 1 and thermal characterization. Smaller pads reduce heat dissipation, causing thermal derating - e.g., at 75 °C ambient, power capability drops to ~240 W. The P4SMA39A-M3/5A's RθJA = 120 °C/W assumes this pad layout; deviations require recalculating junction temperature rise.
P4SMA39A-M3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA39A-M3/5A FAQ
1.How can I place an order for P4SMA39A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39A-M3/5A 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 P4SMA39A-M3/5A reliable?
The price and inventory of P4SMA39A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA39A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39A-M3/5A?
P4SMA39A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39A-M3/5A 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 P4SMA39A-M3/5A?
For technical support, including P4SMA39A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39A-M3/5A requirements.
6.How does Aetrix verify that P4SMA39A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA39A-M3/5A 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 P4SMA39A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA39A-M3/5A?
All P4SMA39A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39A-M3/5A, 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 P4SMA39A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA39A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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