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Vishay General Semiconductor - Diodes Division P4SMA39A-M3/61
- Part No.:
- P4SMA39A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39A-M3/61.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA39A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 33.3 V standoff voltage (VWM), clamps transients to ≤53.9 V at 7.4 A peak pulse current, and delivers 400 W peak pulse power (10/1000 µs waveform) - used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching surges in industrial and automotive electronics.
For engineers reviewing the P4SMA39A-M3/61 datasheet, P4SMA39A-M3/61 pinout, P4SMA39A-M3/61 application, or P4SMA39A-M3/61 equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility with automated placement, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification readiness, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (33.3 V) and rapidly avalanches above VBR (min. 37.1 V) to limit transient voltages. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance enables effective energy diversion during fast-rising ESD or lightning-induced transients.
The device is rated for repetitive 10/1000 µs pulses at 0.01% duty cycle (400 W up to 91 V; derated to 300 W above), supports 40 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across -65 °C to +150 °C junction temperature range - making it suitable for harsh-environment deployments where reliability under thermal stress and surge repetition is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise avalanche onset threshold for predictable clamping behavior |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting stress on downstream components |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity under standardized test waveform |
| IFSM | 40 A (8.3 ms half-sine) - withstands single large inrush events without failure |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, measured on 0.2" × 0.2" copper pads |
| TJ max | +150 °C - maximum allowable junction temperature for sustained operation |
Pinout & Package
Package: SMA (DO-214AC) - surface-mount, low-profile plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, MSL Level 1 (260 °C reflow peak), and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients common in automotive load-dump and industrial motor switching |
| Glass passivated junction | Ensures long-term stability of VBR and low parametric drift over temperature and lifetime |
| AEC-Q101 qualified option available | Supports automotive-grade reliability requirements when ordered with HE3/HM3 suffixes |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance mandates for industrial and consumer electronics without compromising performance |
| Low profile SMA package | Facilitates high-density PCB layouts and compatibility with standard SMT assembly processes |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O lines from back-EMF spikes generated by brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp inductive kickback before it reaches sensitive logic. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or permanent damage to 3.3 V/5 V logic and MOSFET gate oxides. |
Use Scenario: Shielding analog front-end circuits of wheel speed or pressure sensors from ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Standoff-mode protector on sensor supply line, activated only during overvoltage events with sub-nanosecond response. Use Value: Maintains 33.3 V operating margin while clamping 400 W surges - compatible with AEC-Q101-compliant system designs. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Input-stage surge suppression on 24 V/48 V telecom rectifier outputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping element parallel to bulk capacitor, absorbing energy before downstream DC/DC converters. Use Value: Withstands 7.4 A peak pulse current and dissipates 400 W transient energy without degradation under repeated stress. |
Use Scenario: Protecting MCU reset lines and communication buses (e.g., I²C) in washing machines and HVAC controllers from ESD and relay bounce. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) standoff device that avoids loading signal integrity during normal operation. Use Value: Delivers <10 ns response time and 53.9 V clamping to preserve signal fidelity while meeting IEC 61000-4-2 Level 4 (15 kV air) immunity. |
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 | Same SMA package, identical VBR (37.1–41.0 V), but rated for 400 W with tighter VC tolerance (53.3 V max); slightly lower RθJA (110 °C/W) | Preferred where tighter clamping consistency is required; not AEC-Q101 qualified in standard grade | Select SMAJ39A if tighter VC spec and higher production volume justify sourcing from alternate family |
| 1.5SMC39A | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass (RθJA = 60 °C/W), 1500 W peak power rating | Better suited for high-repetition-rate or high-ambient-temperature environments where heat dissipation is critical | Choose 1.5SMC39A when board space allows larger footprint and thermal management demands exceed SMA limits |
Compared with SMAJ39A and 1.5SMC39A, P4SMA39A-M3/61 offers halogen-free RoHS compliance and AEC-Q101 qualification path in the compact SMA form factor - balancing size, environmental compliance, and automotive readiness without sacrificing core clamping performance.
Availability
P4SMA39A-M3/61 is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and telecom power supply applications requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification support.
Supply support for P4SMA39A-M3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems where space, thermal constraints, and surge immunity must coexist.
FAQ
What is the breakdown voltage range for P4SMA39A-M3/61?
The P4SMA39A-M3/61 has a guaranteed breakdown voltage (VBR) range of 37.1 V to 41.0 V at a test current of 1 mA, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 36–42 V system protection schemes. The P4SMA39A-M3/61 achieves this specification using a glass-passivated silicon junction for long-term stability.
Is P4SMA39A-M3/61 suitable for automotive applications?
Yes - the P4SMA39A-M3/61 is halogen-free and RoHS-compliant (M3 suffix), and AEC-Q101 qualification is available via the HM3 suffix variant (e.g., P4SMA39AHM3_A). While the base P4SMA39A-M3/61 itself is commercial-grade, its construction - including MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and robust surge ratings - aligns with automotive subsystem requirements when validated in context. Engineers should specify P4SMA39AHM3_A for certified automotive use.
What is the maximum clamping voltage of P4SMA39A-M3/61 under surge conditions?
The P4SMA39A-M3/61 clamps to a maximum of 53.9 V when subjected to its rated 7.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended PCB pads and represents the upper bound of voltage seen by protected circuitry during worst-case transient events. The P4SMA39A-M3/61 maintains this clamping performance across its full operating temperature range with minimal derating.
Does P4SMA39A-M3/61 have bidirectional capability?
No - P4SMA39A-M3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse-bias avalanche mode and must be oriented with cathode toward the protected line. For bidirectional protection, Vishay offers the P4SMA39CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking. The P4SMA39A-M3/61 is not interchangeable with bidirectional types without circuit redesign.
What package type does P4SMA39A-M3/61 use, and what are its mounting requirements?
P4SMA39A-M3/61 uses the SMA (DO-214AC) surface-mount package: a low-profile, two-terminal plastic case with matte tin-plated leads. It requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 400 W pulse power dissipation and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). The P4SMA39A-M3/61 is optimized for automated pick-and-place and reflow soldering in high-volume manufacturing.
P4SMA39A-M3/61 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-M3/61 FAQ
1.How can I place an order for P4SMA39A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39A-M3/61 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-M3/61 reliable?
The price and inventory of P4SMA39A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA39A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39A-M3/61?
P4SMA39A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39A-M3/61 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-M3/61?
For technical support, including P4SMA39A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39A-M3/61 requirements.
6.How does Aetrix verify that P4SMA39A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA39A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA39A-M3/61?
All P4SMA39A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA39A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39A-M3/61 Tags
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