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Vishay General Semiconductor - Diodes Division P4SMA39A-E3/5A
- Part No.:
- P4SMA39A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39A-E3/5A.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA39A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages 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 - suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA39A-E3/5A datasheet, P4SMA39A-E3/5A pinout, P4SMA39A-E3/5A application, or P4SMA39A-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The P4SMA39A-E3/5A operates as a clamping-type TVS diode that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, limiting transient energy to protected downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and inductive switching transients.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient, on minimum pad layout) and RθJL = 30 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes - though P4SMA39A-E3/5A itself is commercial-grade RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR @ IT = 1 mA | 37.1–41.0 V - Breakdown voltage range at test current; determines precise clamping onset under transient stress. |
| VC @ IPPM = 7.4 A | 53.9 V - Clamped voltage during 10/1000 µs surge; directly limits peak stress on protected IC or MOSFET. |
| PPPM | 400 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 3 surges. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); supports high-energy inductive load switching events. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or industrial ambient environments. |
| Package | SMA (DO-214AC) - Standard surface-mount outline with 5.0 mm × 5.0 mm copper pad footprint; compatible with J-STD-020 MSL Level 1. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode band marking for unidirectional polarity, UL 94 V-0 flammability rating, and 0.208" × 0.157" (5.28 mm × 3.99 mm) body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference plane; completes clamping loop during reverse transient events. |
| Cathode | Transient voltage sensing / clamping node | Connected to protected line (e.g., 3.3 V rail or sensor output); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA at VWM), and long-term reliability under thermal cycling. |
| 400 W peak pulse power (10/1000 µs) | Provides robust immunity against lightning-induced surges and inductive kickback in 24 V industrial control systems. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow soldering without pre-baking; supports high-volume automated assembly. |
| RoHS-compliant, matte tin plating | Meets J-STD-002 and JESD22-B102 solderability standards; eliminates whisker growth risk per JESD201 Class 2. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against voltage spikes from relay coil de-energization and H-bridge shoot-through. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between MOSFET gate and source, or across MCU GPIO and chassis ground. Use Value: Limits transient voltage to ≤53.9 V during 7.4 A surge, preventing gate oxide rupture in 40 V-rated logic-level MOSFETs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in engine control units from load dump and alternator ripple. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between sensor VOUT line and ground, with 33.3 V VWM matching 3.3 V or 5 V supply rails. Use Value: Clamps 100 V transients to 53.9 V within <1 ns, preserving ADC input integrity and avoiding system reset. |
| Telecom Power Supply Input | Consumer USB Port ESD Protection |
|
Use Scenario: Secondary-side transient suppression on +12 V or +48 V telecom power distribution boards exposed to induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor terminals to absorb repetitive line transients. Use Value: Handles 400 W pulses at 0.01% duty cycle, maintaining <1 µA leakage at 33.3 V to avoid standby power penalty. |
Use Scenario: Board-level ESD safeguard for USB 2.0 data lines and VBUS in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS rail (with cathode to rail, anode to ground) to clamp contact discharge. Use Value: With 53.9 V clamping and 33.3 V standoff, prevents overvoltage on 5 V tolerant USB PHY while passing USB 2.0 eye diagram compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5A (Vishay) | Lower VWM = 33.0 V, VBR = 36.7–40.6 V, VC = 53.3 V at 7.5 A; same SMA package and 400 W rating. | Narrower VBR tolerance and slightly lower clamping voltage; better suited for tighter 3.3 V rail margins. | Select SMAJ33A-E3/5A when design requires tighter VBR consistency or lower clamping headroom than P4SMA39A-E3/5A provides. |
| 1.5SMC33A (ON Semiconductor) | Same VWM = 33.0 V, but higher VC = 55.0 V at 7.3 A; SMC (DO-214AB) package with larger 7.1 mm × 6.2 mm footprint. | Larger thermal mass improves power derating above 25 °C but requires PCB layout change; not drop-in compatible. | Choose 1.5SMC33A only if board space permits SMC package and higher thermal resilience is prioritized over footprint minimization. |
Compared with SMAJ33A-E3/5A and 1.5SMC33A, P4SMA39A-E3/5A offers a balanced combination of 33.3 V standoff, 53.9 V clamping, and compact SMA footprint - making it optimal for space-constrained industrial and automotive PCBs where exact 33 V-class protection with proven manufacturability is required.
Availability
P4SMA39A-E3/5A is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and telecom power supply applications requiring stable component supply, RoHS compliance, and automated SMT placement support.
Supply support for P4SMA39A-E3/5A 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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for cost-effective, high-power transient suppression in surface-mount designs - targeting industrial automation, automotive subsystems, and communications infrastructure where ruggedness and standardized packaging are critical.
FAQ
What is the maximum clamping voltage of the P4SMA39A-E3/5A under a 10/1000 µs surge?
The P4SMA39A-E3/5A has a maximum clamping voltage (VC) of 53.9 V when subjected to a 7.4 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA39A-E3/5A maintains this clamping performance across its specified operating temperature range and is validated for repetitive surges at 0.01% duty cycle.
Is the P4SMA39A-E3/5A suitable for automotive applications?
The P4SMA39A-E3/5A is RoHS-compliant and manufactured to commercial-grade specifications. While it shares the same die and electrical characteristics as AEC-Q101-qualified variants (e.g., P4SMA39AHE3_A), the P4SMA39A-E3/5A itself is not AEC-Q101 certified. For production automotive use, engineers must select the HE3 or HM3 suffix versions. The P4SMA39A-E3/5A remains appropriate for automotive prototyping, aftermarket modules, or non-safety-critical subsystems where full qualification is not mandated.
What does the "E3/5A" suffix indicate in P4SMA39A-E3/5A?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability requirements. The "/5A" indicates packaging in a 13-inch diameter plastic tape-and-reel format containing 7500 units per reel - optimized for high-speed pick-and-place assembly. This differs from "/61", which specifies a 7-inch reel with 1800 units. The P4SMA39A-E3/5A thus supports volume manufacturing with industry-standard SMT logistics.
How does the P4SMA39A-E3/5A compare to bidirectional TVS diodes like P4SMA39CA?
The P4SMA39A-E3/5A is unidirectional and features a cathode band marking; it conducts only during reverse overvoltage events and blocks forward current. In contrast, P4SMA39CA is bidirectional with no polarity marking and clamps transients of either polarity. The P4SMA39A-E3/5A offers lower leakage (<1 µA at 33.3 V) and is preferred for DC power rail protection, whereas P4SMA39CA suits AC-coupled signal lines or differential buses where polarity reversal may occur.
What PCB pad layout is recommended for optimal thermal performance of the P4SMA39A-E3/5A?
Vishay specifies a 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area for each terminal of the P4SMA39A-E3/5A to achieve its rated 400 W peak pulse power. Smaller pads reduce thermal dissipation and cause premature failure under repeated surges. The P4SMA39A-E3/5A's RθJA = 120 °C/W is characterized using this layout; deviating requires derating per Figure 2 in datasheet 88367. Thermal vias under pads further improve heat transfer in high-density layouts.
P4SMA39A-E3/5A 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-E3/5A FAQ
1.How can I place an order for P4SMA39A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA39A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA39A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39A-E3/5A?
P4SMA39A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39A-E3/5A 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-E3/5A?
For technical support, including P4SMA39A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39A-E3/5A requirements.
6.How does Aetrix verify that P4SMA39A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA39A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA39A-E3/5A?
All P4SMA39A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA39A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39A-E3/5A Tags
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