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Vishay General Semiconductor - Diodes Division P4SMA39CAHE3_A/I
- Part No.:
- P4SMA39CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39CAHE3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,038
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Product details
Overview
P4SMA39CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in 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 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and ICs in automotive and industrial control systems.
For engineers reviewing the P4SMA39CAHE3_A/I datasheet, P4SMA39CAHE3_A/I pinout, P4SMA39CAHE3_A/I application, or P4SMA39CAHE3_A/I equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant bidirectional TVS for robust ESD and surge protection in space-constrained surface-mount designs requiring stable clamping performance and low incremental surge resistance.
Technical Context
The P4SMA39CAHE3_A/I operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports automated placement and meets MSL level 1 (260 °C peak reflow).
It delivers 400 W peak pulse power (10/1000 µs) up to 91 V; above that threshold, derating applies to 300 W. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), with maximum junction temperature rated at +150 °C and operating range from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 33.3 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1 mA - Voltage at which device enters avalanche conduction; tight tolerance ensures predictable turn-on behavior |
| VC (Clamping Voltage) | 53.9 V at 7.4 A (10/1000 µs) - Peak voltage seen by protected circuit during surge; critical for ensuring downstream component survival |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard 10/1000 µs waveform; confirms suitability for IEC 61000-4-5 Level 3/4 surges |
| IPPM (Peak Pulse Current) | 7.4 A - Maximum non-repetitive surge current the device can safely divert without degradation |
| TJmax | +150 °C - Maximum allowable junction temperature; enables reliable operation in under-hood automotive and high-ambient industrial environments |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | No polarity marking required; terminals are functionally identical for transient suppression in either direction |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Device has no band or marking - distinguishes it from unidirectional variants and confirms true bidirectional functionality |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Transient Suppression | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485, sensor bridges) without external polarity management |
| 400 W Peak Pulse Power (10/1000 µs) | Supports robust immunity against lightning-induced surges and inductive switching transients in industrial motor drives and automotive ECUs |
| AEC-Q101 Qualification | Validates long-term reliability under automotive thermal, mechanical, and electrical stress conditions - required for under-hood and ADAS applications |
| Low Incremental Surge Resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces |
| MSL Level 1 Moisture Sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across sensor supply and ground to limit transient overvoltage before reaching ADC input or signal conditioner. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤53.9 V, preventing latch-up or damage to 3.3 V rail components. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subject to field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to shunt surge energy away from optocoupler input LED and upstream protection circuitry. Use Value: Absorbs 400 W transient energy within nanoseconds, limiting voltage excursion to <54 V and preserving input stage reliability over 100,000+ cycles. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding RS-485 transceiver data lines in base station backhaul equipment from EFT and surge coupling via shared cabling. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground, suppressing common- and differential-mode transients simultaneously. Use Value: Symmetric clamping ensures balanced line protection without skew; 53.9 V clamp prevents transceiver damage during 4 kV EFT bursts per IEC 61000-4-4. |
Use Scenario: Guarding microcontroller GPIOs driving relay coils or small BLDC motors in smart home appliances where inductive kickback exceeds MCU voltage ratings. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to coil driver FET to absorb flyback energy before it propagates into logic supply rails. Use Value: Fast response (<1 ns) and low clamping voltage reduce radiated emissions and eliminate reset faults caused by >50 V spikes on 3.3 V control lines. |
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), same VC (58.1 V), larger SMB package (DO-214AA), 600 W PPPM | Better suited for 36 V nominal systems; less space-efficient than SMA for dense PCB layouts | Select when higher standoff margin or greater surge margin is needed, and board area permits larger footprint |
| 1.5SMC39CA | Same VWM/VBR/VC, but SMC (DO-214AB) package, 1500 W PPPM, higher IPPM (38.9 A) | Targeted at high-energy industrial surge environments (e.g., AC mains input); not AEC-Q101 qualified | Choose for non-automotive applications demanding higher single-pulse energy handling, accepting larger size and no automotive qualification |
Compared with SMBJ36CA and 1.5SMC39CA, the P4SMA39CAHE3_A/I offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and precise 33.3 V standoff for 36 V-rated systems - making it preferred for automotive body electronics and space-constrained industrial controllers where qualification and layout density are primary constraints.
Availability
P4SMA39CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer appliance motor drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA39CAHE3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance, AEC-Q101 validation, and surface-mount scalability across voltage grades.
FAQ
What is the polarity configuration of P4SMA39CAHE3_A/I?
The P4SMA39CAHE3_A/I is a bidirectional TVS diode with no polarity marking - both terminals are functionally identical. This allows it to suppress positive and negative transients equally, making it ideal for AC signal lines, differential buses, and ungrounded power rails where polarity cannot be assumed. Unlike unidirectional variants (e.g., P4SMA39A), it does not feature a cathode band.
Does P4SMA39CAHE3_A/I meet automotive qualification standards?
Yes, P4SMA39CAHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS-compliant, automotive-grade construction. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, confirming suitability for under-hood and chassis-mounted applications in passenger vehicles and commercial fleets.
What is the maximum clamping voltage of P4SMA39CAHE3_A/I under surge conditions?
The maximum clamping voltage (VC) of P4SMA39CAHE3_A/I is 53.9 V at 7.4 A peak pulse current with a 10/1000 µs waveform. This value represents the highest voltage the protected circuit will experience during a standardized surge event - critical for ensuring compatibility with 3.3 V, 5 V, or 24 V system rails and downstream ICs rated to withstand ≤60 V transients.
How does the SMA package of P4SMA39CAHE3_A/I impact thermal performance?
The SMA (DO-214AC) package of P4SMA39CAHE3_A/I provides a thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead) when mounted on 0.2" × 0.2" copper pads. This enables effective heat dissipation during repetitive surge events, supporting continuous operation up to +150 °C junction temperature - essential for automotive and industrial environments with elevated ambient temperatures.
Can P4SMA39CAHE3_A/I replace unidirectional TVS diodes in existing designs?
No - P4SMA39CAHE3_A/I is strictly bidirectional and lacks polarity marking, so it cannot substitute for unidirectional TVS diodes (e.g., P4SMA39A) in circuits requiring forward conduction or DC blocking. Attempting replacement may result in unintended conduction paths or failure to clamp correctly. Always verify circuit topology and transient polarity before selecting between CA (bidirectional) and A (unidirectional) variants of the P4SMA series.
P4SMA39CAHE3_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:
- -
- 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/I FAQ
1.How can I place an order for P4SMA39CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39CAHE3_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 P4SMA39CAHE3_A/I reliable?
The price and inventory of P4SMA39CAHE3_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 P4SMA39CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA39CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39CAHE3_A/I?
P4SMA39CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39CAHE3_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 P4SMA39CAHE3_A/I?
For technical support, including P4SMA39CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA39CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA39CAHE3_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 P4SMA39CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA39CAHE3_A/I?
All P4SMA39CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39CAHE3_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 P4SMA39CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA39CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39CAHE3_A/I Tags
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