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Vishay General Semiconductor - Diodes Division P4SMA39AHE3_A/I
- Part No.:
- P4SMA39AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39AHE3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,654
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Product details
Overview
P4SMA39AHE3_A/I 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 39 V standoff voltage (VWM), 41.0 V maximum breakdown voltage (VBR), 53.9 V clamping voltage at 7.4 A peak pulse current, and 400 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P4SMA39AHE3_A/I datasheet, P4SMA39AHE3_A/I pinout, P4SMA39AHE3_A/I application, or P4SMA39AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The P4SMA39AHE3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (37.1–41.0 V at 1 mA). Its glass-passivated junction ensures stable clamping performance under repetitive transient stress, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
It meets J-STD-020 MSL Level 1, supports 260 °C lead-free reflow, and is rated for -65 °C to +150 °C operating junction temperature. The device delivers 400 W peak pulse power up to 91 V; above that, derated to 300 W per specification note (1), with 1.0 µA max reverse leakage at 33.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33.3 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 53.9 V at 7.4 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for downstream IC survivability. |
| PPPM (Peak Pulse Power) | 400 W - Sustains 10/1000 µs surges without failure; enables robust protection against inductive switching spikes. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Negligible standby power loss and minimal impact on high-impedance signal lines. |
| TJ max | +150 °C - Supports operation in under-hood automotive and high-temperature industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay switching or motor commutation without degradation. |
| Glass passivated chip junction | Ensures long-term stability and low parameter drift across temperature and lifetime stress. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and body electronics. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges exceeding 33.3 V. Use Value: Prevents damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events with 53.9 V clamping ceiling. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff protection on 4–20 mA or 0–10 V signal paths exposed to ESD and cable discharge. Use Value: 1.0 µA leakage preserves signal integrity; 53.9 V clamping prevents op-amp input saturation during 8 kV contact ESD. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Clamps flyback transformer leakage spikes and rectifier reverse recovery transients. Use Value: 400 W rating absorbs repetitive 100 ns–1 µs spikes; RoHS-compliant HE3 suffix meets global regulatory requirements. |
Use Scenario: Protecting PoE (Power over Ethernet) powered devices from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Unidirectional TVS on DC input rail upstream of DC/DC converter. Use Value: 33.3 V VWM allows full utilization of 48 V nominal supply while clamping to 53.9 V during lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39A-E3/5A | Same VWM (33.3 V), VBR (37.1–41.0 V), VC (53.9 V), but rated for 400 W at 25 °C only; no AEC-Q101 qualification. | Commercial-grade use only; not suitable for automotive OEM designs requiring AEC validation. | Select P4SMA39AHE3_A/I when AEC-Q101 compliance and extended temperature reliability are mandatory. |
| 1.5SMC39A | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same electrical specs but DO-214AB (SMB) package - 2.5 mm wider. | Requires larger PCB footprint and has lower power derating above 25 °C; less suitable for dense automotive modules. | Choose P4SMA39AHE3_A/I for space-constrained layouts and improved thermal performance in compact enclosures. |
Compared with SMAJ39A-E3/5A and 1.5SMC39A, the P4SMA39AHE3_A/I offers verified AEC-Q101 qualification and superior thermal resistance in a smaller SMA footprint - making it optimal for automotive and high-reliability industrial designs where layout density and qualification traceability are critical.
Availability
P4SMA39AHE3_A/I is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom DC feed applications requiring stable component supply, AEC-Q101 compliance, and consistent surge immunity performance.
Supply support for P4SMA39AHE3_A/I 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, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The P4SMA Series targets cost-effective, high-surge-capability TVS protection for automotive, industrial, and consumer electronics - engineered for automated assembly, AEC-Q101 validation, and stable clamping under repetitive transient stress.
FAQ
What is the clamping voltage of the P4SMA39AHE3_A/I under a 10/1000 µs surge?
The P4SMA39AHE3_A/I clamps to a maximum of 53.9 V at 7.4 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA39AHE3_A/I maintains this clamping performance across its qualified operating temperature range.
Is the P4SMA39AHE3_A/I suitable for automotive applications?
Yes, the P4SMA39AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD, making it appropriate for under-hood and body-control module applications. The P4SMA39AHE3_A/I also meets MSL Level 1 and supports 260 °C lead-free reflow.
What does the "HE3_A/I" suffix mean in P4SMA39AHE3_A/I?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" indicates the revision level per Vishay's internal coding; "I" specifies packaging in 13-inch diameter tape-and-reel format with 7500 units per reel. This full suffix confirms the P4SMA39AHE3_A/I is automotive-grade, halogen-free, and supplied in high-volume SMT-ready format - distinct from commercial-grade E3 or M3 variants.
How does the P4SMA39AHE3_A/I compare to bidirectional TVS diodes like P4SMA39CA?
The P4SMA39AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering tighter leakage control (1.0 µA at VWM) and higher surge ratings than equivalent bidirectional parts. In contrast, P4SMA39CA protects AC or polarity-agnostic lines but exhibits higher reverse leakage and slightly reduced PPPM above 91 V. The P4SMA39AHE3_A/I is not interchangeable with P4SMA39CA without circuit review.
What is the maximum operating temperature for the P4SMA39AHE3_A/I?
The P4SMA39AHE3_A/I has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of -65 °C to +150 °C. Its thermal resistance is 120 °C/W (junction-to-ambient) on standard PCB pads, enabling reliable operation in under-hood automotive environments and enclosed industrial controllers. Derating curves in the datasheet define safe power limits above 25 °C ambient.
P4SMA39AHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA39AHE3_A/I FAQ
1.How can I place an order for P4SMA39AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39AHE3_A/I 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 P4SMA39AHE3_A/I reliable?
The price and inventory of P4SMA39AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA39AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39AHE3_A/I?
P4SMA39AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39AHE3_A/I 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 P4SMA39AHE3_A/I?
For technical support, including P4SMA39AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA39AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA39AHE3_A/I 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 P4SMA39AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA39AHE3_A/I?
All P4SMA39AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39AHE3_A/I, 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 P4SMA39AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA39AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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