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Vishay General Semiconductor - Diodes Division P4SMA39CA-E3/61
- Part No.:
- P4SMA39CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39CA-E3/61.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,107
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Product details
Overview
P4SMA39CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMA (DO-214AC) package, designed for clamping voltage transients on signal and power 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 a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA39CA-E3/61 datasheet, P4SMA39CA-E3/61 pinout, P4SMA39CA-E3/61 application, or P4SMA39CA-E3/61 equivalent, this device delivers verified bidirectional surge suppression with AEC-Q101 qualification (via HE3/HM3 variants), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin plating - critical for high-reliability board-level ESD and lightning transient protection.
Technical Context
The P4SMA39CA-E3/61 operates as a symmetrical avalanche diode, conducting equally in both directions when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) and repeatable clamping performance under repetitive 10/1000 µs surges at 0.01% duty cycle.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead), supporting operation from –65 °C to +150 °C. The SMA package's 0.208" × 0.157" footprint and 0.078" lead spacing are optimized for automated placement and soldering per J-STD-002/JESD 22-B102 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 33.3 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 53.9 V at 7.4 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 400 W - Sustained peak pulse power handling capability; enables robust protection against IEC 61000-4-5 level 4 surges. |
| IPPM | 7.4 A - Maximum non-repetitive surge current supported; determines minimum series impedance required for compliance. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 2.54 mm lead pitch; compatible with standard reflow profiles and AOI inspection. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive-going overvoltage events; forms symmetrical path with cathode. |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative-going overvoltage events; completes bidirectional clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| 400 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to level 4 (4 kV line-earth). |
| AEC-Q101 qualified variants | HE3/HM3 suffix versions support automotive applications including body control modules and ADAS sensor interfaces. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics. |
| Glass passivated junction | Ensures long-term parameter stability and low leakage (<1 µA at VWM) across temperature and lifetime. |
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 vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC pin to shunt surge energy before it reaches sensitive interface circuitry. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive microcontrollers and transceivers. |
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: Primary front-end protection device mounted adjacent to terminal block to absorb 1 kV/0.5 J transients per IEC 61000-4-4. Use Value: Withstands 7.4 A peak current at 53.9 V clamping, ensuring downstream optocouplers and Schmitt triggers remain within safe SOA limits. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Shielding RS-485/RS-232 data lines in base station backhaul units from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Symmetrical TVS pair (or single bidirectional unit) installed differential-to-ground to suppress mode conversion effects. Use Value: 33.3 V VWM provides adequate margin above 24 V nominal line voltage while maintaining fast <1 ns response to sub-microsecond transients. |
Use Scenario: Adding secondary-level surge immunity to USB-C and barrel-jack DC inputs in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Final-stage clamping device after primary MOV/fuse, targeting fast ESD (IEC 61000-4-2 ±8 kV contact) and low-energy surges. Use Value: Low 1 µA leakage at 33.3 V prevents standby current degradation; RoHS/E3 compliance supports global regulatory certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Higher VWM (36 V), lower VC (58.1 V), same SMA package but larger SMB outline (DO-214AA); 600 W PPPM. | Preferred where higher standoff margin is needed (e.g., 36 V systems); less suitable for 24 V rails due to reduced conduction headroom. | Select SMBJ36CA only if board layout accommodates larger 4.58 mm × 3.94 mm footprint and system VWM budget permits 36 V. |
| 1.5KE39CA | Through-hole DO-201 package; identical VWM/VBR/VC specs but 1500 W PPPM; no MSL rating. | Used in legacy or high-power designs where manual assembly or heatsinking is acceptable; not suitable for automated SMT lines. | Choose 1.5KE39CA only for prototyping, repair, or non-SMT applications requiring higher single-pulse energy absorption. |
Compared with SMBJ36CA and 1.5KE39CA, the P4SMA39CA-E3/61 offers optimal balance of compact SMA footprint, AEC-Q101 readiness (via HE3), and precise 33.3 V standoff for 24 V industrial and automotive signal protection - without requiring PCB redesign or sacrificing manufacturability.
Availability
P4SMA39CA-E3/61 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive sensor interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply, RoHS compliance, and MSL Level 1 handling.
Supply support for P4SMA39CA-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, precision, and application-specific optimization.
The P4SMA Series was developed to deliver standardized, high-volume TVS solutions for board-level ESD and surge protection across automotive, industrial, and communications markets - prioritizing consistent parametric performance and automated assembly compatibility.
FAQ
What is the clamping voltage of the P4SMA39CA-E3/61 at its rated peak pulse current?
The P4SMA39CA-E3/61 has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA39CA-E3/61 maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C) with minimal derating.
Is the P4SMA39CA-E3/61 suitable for automotive applications?
The P4SMA39CA-E3/61 itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified variants under ordering codes P4SMA39CAHE3_A and P4SMA39CAHM3_A (with "_A" revision). These HE3/HM3 versions undergo stress testing per AEC-Q101 and are approved for automotive use. The P4SMA39CA-E3/61 should be specified only for non-automotive applications unless upgraded to an HE3/HM3 suffix variant.
What is the standoff voltage (VWM) of the P4SMA39CA-E3/61, and how does it relate to system voltage?
The P4SMA39CA-E3/61 has a standoff voltage (VWM) of 33.3 V - the maximum DC or RMS voltage that can be continuously applied without triggering conduction. For reliable operation, system operating voltage must remain below this value with margin; it is commonly selected for 24 V nominal systems where 33.3 V provides ~39% headroom above 24 V, accommodating ripple and transients before clamping initiates. This VWM is confirmed in Table 1 of Vishay document 88367.
Does the P4SMA39CA-E3/61 have polarity markings, and how is it oriented on the PCB?
No - the P4SMA39CA-E3/61 is a bidirectional TVS diode and carries no polarity marking on its SMA (DO-214AC) package. Unlike unidirectional types (which feature a cathode band), the P4SMA39CA-E3/61 functions identically regardless of orientation. Its terminals are electrically symmetric: either end serves as anode or cathode depending on instantaneous voltage polarity. PCB layout requires no directional placement for the P4SMA39CA-E3/61.
What is the thermal resistance of the P4SMA39CA-E3/61, and how does it affect power dissipation?
The P4SMA39CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value determines steady-state temperature rise: at 3.3 W continuous power (PD), junction temperature rises ~396 °C above ambient - confirming that PD applies only to DC conditions and that transient surge handling relies on thermal mass, not steady-state cooling. The P4SMA39CA-E3/61 is rated for 400 W peak pulses precisely because its short-duration energy doesn't significantly raise average junction temperature.
P4SMA39CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA39CA-E3/61 FAQ
1.How can I place an order for P4SMA39CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39CA-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 P4SMA39CA-E3/61 reliable?
The price and inventory of P4SMA39CA-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 P4SMA39CA-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA39CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39CA-E3/61?
P4SMA39CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39CA-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 P4SMA39CA-E3/61?
For technical support, including P4SMA39CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39CA-E3/61 requirements.
6.How does Aetrix verify that P4SMA39CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA39CA-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 P4SMA39CA-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA39CA-E3/61?
All P4SMA39CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39CA-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 P4SMA39CA-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA39CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39CA-E3/61 Tags
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