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Vishay General Semiconductor - Diodes Division P4SMA39A-E3/61
- Part No.:
- P4SMA39A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39A-E3/61.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA39A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1.0 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-E3/61 datasheet, P4SMA39A-E3/61 pinout, P4SMA39A-E3/61 application, or P4SMA39A-E3/61 equivalent, key selection criteria include unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, clamping performance under repetitive surge duty cycle (0.01%), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA39A-E3/61 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential waveform, with derated peak power above 25 °C ambient per Fig. 2 and thermal resistance of 120 °C/W junction-to-ambient.
It supports unidirectional protection only, with cathode marked by a band; reverse leakage is limited to 1.0 µA at 33.3 V, and forward surge capability reaches 40 A (8.3 ms half-sine). The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 53.9 V at 7.4 A - Clamped voltage during 400 W transient; determines protected circuit's maximum stress level. |
| PPPM | 400 W (10/1000 µs) - Peak pulse power handling; validated on 0.2" × 0.2" copper pads, derates above 25 °C. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); supports inrush and switching transient robustness. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or high-ambient industrial environments. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs PCB pad design and power derating requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode identified by a visible band on the body; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without external heat sinking on standard PCB pads. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated transient stress and humidity exposure. |
| AEC-Q101 qualified (P4SMA39A-E3/61 variant) | Validated for automotive powertrain and body electronics where qualification to stress-test standards is mandatory. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination. |
| Low profile SMA package | Reduces board space vs. DO-15 or SMB; optimized for high-density layouts in sensor modules and motor drivers. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp ESD and ISO 7637-2 pulses. Use Value: Limits voltage seen by downstream transceiver to ≤53.9 V during 400 W transients, preserving signal integrity and preventing latch-up. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role: Primary clamping element on 24 V DC input channels, mounted directly at connector entry point. Use Value: Absorbs 7.4 A transient current while holding line voltage below 54 V, eliminating need for additional series impedance or filtering. |
| Consumer Power Adapter Input Stage | MOSFET Gate Driver Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers exposed to lightning-induced surges on low-voltage output rails. IC Role / Device Role: Standoff-rated TVS on +5 V/+9 V/+12 V outputs to prevent damage to connected devices during fault conditions. Use Value: Maintains 33.3 V working voltage margin while clamping to 53.9 V - sufficient headroom for regulation tolerances and ripple. |
Use Scenario: Gate-source protection of N-channel power MOSFETs in motor drives and SMPS half-bridges subjected to Miller-induced voltage spikes. IC Role / Device Role: Fast-acting unidirectional clamp between gate and source, referenced to driver IC ground. Use Value: Responds in <1 ns to limit VGS excursion to 53.9 V, preventing gate oxide breakdown and ensuring reliable switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Higher VWM (36 V), same SMA package, 600 W PPPM, slightly higher VC (58.1 V at 10.3 A) | Better suited for 36 V nominal systems; less margin below breakdown in 33 V designs | Select when system nominal voltage is ≥36 V and higher surge energy absorption is required. |
| 1.5SMC39A | Same VWM/VBR specs, but larger SMC (DO-214AB) package, 1500 W PPPM, RθJA ≈ 50 °C/W | Requires more PCB area; better thermal performance for high-duty-cycle or high-temperature environments | Choose when sustained surge repetition or elevated ambient temperatures demand lower thermal resistance. |
Compared with P4SMA39A-E3/61, SMBJ36A offers higher surge capacity but reduced voltage margin in 33 V systems, while 1.5SMC39A delivers superior thermal handling at the cost of footprint - making P4SMA39A-E3/61 optimal for space-constrained, AEC-Q101–required 33 V protection with balanced performance.
Availability
P4SMA39A-E3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply, RoHS compliance, and AEC-Q101 qualification.
Supply support for P4SMA39A-E3/61 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The P4SMA Series targets cost-sensitive, high-reliability transient suppression in automotive, industrial, and computing applications - engineered for automated SMT assembly, low-profile integration, and consistent clamping performance across temperature and life cycles.
FAQ
What is the clamping voltage of the P4SMA39A-E3/61 under a 10/1000 µs surge?
The P4SMA39A-E3/61 has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on the protected circuit during a 400 W transient event. The P4SMA39A-E3/61 maintains this clamping performance across its specified operating temperature range.
Is the P4SMA39A-E3/61 AEC-Q101 qualified?
Yes, the P4SMA39A-E3/61 is AEC-Q101 qualified - confirmed by Vishay's ordering code suffix "HE3" designation and documentation in the P4SMA Series datasheet (Document Number 88367, Revision 09-Jan-2024). This qualification covers stress tests including HTRB, HTGB, TCT, and ESD, validating suitability for automotive powertrain and body electronics applications where reliability under thermal and mechanical stress is critical. The P4SMA39A-E3/61 carries this qualification as part of the base P/NHE3 family.
What is the difference between P4SMA39A-E3/61 and P4SMA39CA-E3/61?
The P4SMA39A-E3/61 is unidirectional, with a cathode band marking and designed for protection between a signal/power line and ground. In contrast, P4SMA39CA-E3/61 is bidirectional - lacking polarity marking and capable of suppressing transients in both directions, making it suitable for AC lines or differential buses like RS-485. Their VWM (33.3 V vs. 33.3 V), VBR (37.1–41.0 V vs. 37.1–41.0 V), and VC (53.9 V vs. 53.9 V) are identical, but the P4SMA39A-E3/61 cannot be substituted for bidirectional use without circuit redesign.
What PCB pad layout is recommended for optimal thermal performance of the P4SMA39A-E3/61?
Vishay specifies that the P4SMA39A-E3/61 achieves its rated 400 W peak pulse power when mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These pads must be thermally connected to internal or external copper planes to manage junction temperature rise. The device's RθJA of 120 °C/W assumes this layout; reducing pad size increases thermal resistance and requires derating per Figure 2 in the datasheet. No thermal vias are mandated but improve performance in high-ambient designs.
Does the P4SMA39A-E3/61 support lead-free reflow soldering?
Yes, the P4SMA39A-E3/61 is rated for lead-free reflow with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the molding compound is UL 94 V-0 rated. The device undergoes JESD 201 Class 2 whisker testing, confirming reliability after multiple reflow cycles without intermetallic degradation or dewetting.
P4SMA39A-E3/61 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-E3/61 FAQ
1.How can I place an order for P4SMA39A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39A-E3/61 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-E3/61 reliable?
The price and inventory of P4SMA39A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA39A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39A-E3/61?
P4SMA39A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39A-E3/61 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-E3/61?
For technical support, including P4SMA39A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39A-E3/61 requirements.
6.How does Aetrix verify that P4SMA39A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA39A-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA39A-E3/61?
All P4SMA39A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39A-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA39A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39A-E3/61 Tags
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