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Vishay General Semiconductor - Diodes Division P4SMA39CAHE3_A/H
- Part No.:
- P4SMA39CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39CAHE3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,698
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Product details
Overview
P4SMA39CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 39 V breakdown voltage (VBR min/max = 37.1–41.0 V at 1 mA), 33.3 V standoff voltage (VWM), 53.9 V clamping voltage (VC) 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 systems.
For engineers reviewing the P4SMA39CAHE3_A/H datasheet, P4SMA39CAHE3_A/H pinout, P4SMA39CAHE3_A/H application, or P4SMA39CAHE3_A/H equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant bidirectional TVS optimized for fast transient suppression in space-constrained PCB layouts with automated placement compatibility.
Technical Context
The P4SMA39CAHE3_A/H operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - confirming suitability for moderate-power surge events on PCBs with standard 0.2" × 0.2" copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 400 W - peak pulse power handling capacity; enables robust protection against IEC 61000-4-5 Level 3/4 surges |
| IPPM | 7.4 A - maximum non-repetitive peak pulse current; defines surge current limit before thermal runaway |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias (unidirectional mode); symmetrical terminal in bidirectional operation | No polarity marking - identical electrical behavior in either direction; connects to line under protection |
| Cathode | Current exit point in forward bias (unidirectional mode); symmetrical terminal in bidirectional operation | No polarity marking - identical electrical behavior in either direction; connects to line under protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity constraints or external diode pairing |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in properly coupled systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic interfaces |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control units, body electronics, and ADAS sensors |
| MSL Level 1, 260 °C peak reflow | Permits single-pass lead-free assembly without moisture-related popcorning or delamination risks |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or supply rail to clamp transients before they reach sensitive input stages. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by limiting clamped voltage to 53.9 V during 7.4 A surges. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel input to absorb repetitive 10/1000 µs transients from solenoid actuation or relay switching. Use Value: Maintains system uptime by preventing false triggering or input stage failure under 400 W surge conditions per channel. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair data lines in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on differential pairs to suppress common-mode transients without distorting signal integrity. Use Value: Ensures <1 ns response time and <54 V clamping to preserve Ethernet compliance while surviving repeated 1 kV surges. |
Use Scenario: Guarding microcontroller GPIOs and gate drivers in washing machine motor control boards against back-EMF from brushed DC motors. IC Role / Device Role / Timing Role: Localized TVS at motor driver output pins to shunt inductive kickback energy away from logic-level components. Use Value: Eliminates need for snubber RC networks by providing integrated 400 W surge absorption in 2.5 mm × 4.5 mm footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39CA | Higher package thermal mass (SMB/DO-214AA); 600 W PPPM; same VBR/VC specs but larger footprint (4.5 × 3.9 mm vs. 4.5 × 2.5 mm) | Better suited for higher-energy surges where board area allows; less optimal for ultra-dense automotive modules | Select SMBJ39CA when surge energy exceeds 400 W or when higher IPPM margin is required |
| 1.5SMC39CA | Higher PPPM (1500 W); larger SMC (DO-214AB) package; identical VBR/VC but 2× thermal resistance (RθJA = 250 °C/W) | Used in primary-side AC/DC input protection; not suitable for fine-pitch signal-line placement | Choose 1.5SMC39CA only for front-end mains or high-power DC bus protection, not for signal-level circuits |
Compared with SMBJ39CA and 1.5SMC39CA, the P4SMA39CAHE3_A/H provides optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capability - making it the preferred choice for space-constrained, automotive-grade signal-line protection where layout density and reflow compatibility are critical.
Availability
P4SMA39CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and consumer appliance motor controls requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA39CAHE3_A/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - delivering AEC-Q101-qualified TVS performance in compact surface-mount packages.
FAQ
What is the breakdown voltage tolerance for P4SMA39CAHE3_A/H?
The P4SMA39CAHE3_A/H has a specified breakdown voltage range of 37.1 V to 41.0 V at test current IT = 1 mA, corresponding to ±5.5% tolerance around the nominal 39 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margining in safety-critical automotive applications where the P4SMA39CAHE3_A/H is commonly deployed.
Is P4SMA39CAHE3_A/H suitable for bidirectional signal line protection?
Yes, the P4SMA39CAHE3_A/H is explicitly designed as a bidirectional TVS, indicated by the "CA" suffix. Its symmetrical I-V characteristic enables clamping of positive and negative transients equally - ideal for protecting differential interfaces like RS-485, CAN, or audio lines. Unlike unidirectional variants, the P4SMA39CAHE3_A/H has no polarity marking and performs identically regardless of voltage polarity applied across its terminals.
Does P4SMA39CAHE3_A/H meet automotive reliability standards?
Yes, the P4SMA39CAHE3_A/H carries AEC-Q101 qualification, verified through stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD). Its HE3 suffix denotes RoHS-compliant and AEC-Q101-qualified construction, making the P4SMA39CAHE3_A/H appropriate for under-hood and cabin electronics where long-term reliability under thermal and mechanical stress is mandatory.
What is the maximum clamping voltage of P4SMA39CAHE3_A/H during a surge event?
The P4SMA39CAHE3_A/H exhibits a maximum clamping voltage (VC) of 53.9 V at peak pulse current IPPM = 7.4 A under the standardized 10/1000 µs waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case surge conditions and is critical for ensuring downstream components - such as 3.3 V or 5 V logic ICs - remain within absolute maximum ratings when the P4SMA39CAHE3_A/H is active.
Can P4SMA39CAHE3_A/H be used in lead-free reflow processes?
Yes, the P4SMA39CAHE3_A/H is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, fully compatible with standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, and the device passes JESD201 Class 2 whisker testing - confirming robust intermetallic formation and long-term solder joint integrity after P4SMA39CAHE3_A/H assembly.
P4SMA39CAHE3_A/H 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA39CAHE3_A/H FAQ
1.How can I place an order for P4SMA39CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39CAHE3_A/H 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 P4SMA39CAHE3_A/H reliable?
The price and inventory of P4SMA39CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA39CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39CAHE3_A/H?
P4SMA39CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39CAHE3_A/H 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 P4SMA39CAHE3_A/H?
For technical support, including P4SMA39CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA39CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA39CAHE3_A/H 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 P4SMA39CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA39CAHE3_A/H?
All P4SMA39CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39CAHE3_A/H, 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 P4SMA39CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA39CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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