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Vishay General Semiconductor - Diodes Division P4SMA91CA-E3/61
- Part No.:
- P4SMA91CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CA-E3/61.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,392
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Product details
Overview
P4SMA91CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 125 V maximum clamping voltage (VC) at 3.2 A peak pulse current, 400 W peak pulse power (10/1000 µs), 77.8 V stand-off voltage (VWM), and operates across -65 °C to +150 °C junction temperature range - deployed in sensor interface protection and automotive ECUs.
For engineers reviewing the P4SMA91CA-E3/61 datasheet, P4SMA91CA-E3/61 pinout, P4SMA91CA-E3/61 application, or P4SMA91CA-E3/61 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, SMA (DO-214AC) package dimensions, thermal resistance (RθJA = 120 °C/W), and direct alternatives with documented VBR, VC, and PPPM differences.
Technical Context
The P4SMA91CA-E3/61 uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients. Its bidirectional architecture provides symmetrical clamping in both polarities without polarity marking.
Rated for 400 W peak pulse power (10/1000 µs waveform) up to 25 °C - derated linearly above TA = 25 °C per Fig. 2 - it delivers 3.2 A IPPM at VC = 125 V and maintains <1.0 µA reverse leakage at VWM = 77.8 V. It meets MSL Level 1 (J-STD-020) and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 77.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 125 V at 3.2 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity on standard test waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB copper pad layout design |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | SMA (DO-214AC) - 5.0 mm × 5.0 mm copper pad footprint, compatible with automated SMT placement |
Pinout & Package
SMA (DO-214AC) surface-mount package: molded epoxy case meeting UL 94 V-0, matte tin-plated terminals, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; symmetric with cathode in bidirectional mode |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; functionally identical to anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors |
| AEC-Q101 qualification option | Available as P4SMA91CAHE3_A for automotive-grade reliability validation |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake requirements |
Applications
| Automotive Sensor Interface | Industrial CAN Bus 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 TVS placed across sensor supply and ground to clamp transients before they reach ADC input stages. Use Value: Limits voltage to ≤125 V during 400 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V signal conditioning ICs. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and burst noise in factory automation nodes. IC Role / Device Role / Timing Role: One P4SMA91CA-E3/61 across CANH-GND and another across CANL-GND to suppress common-mode transients. Use Value: Clamps to 125 V within nanoseconds, preserving CAN transceiver integrity while maintaining bus timing margins. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Guard |
Use Scenario: Secondary protection on 48 V DC power feeds entering VoIP gateway line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Placed after primary GDT or MOV, acting as fast-acting secondary clamp to limit let-through voltage. Use Value: 77.8 V VWM ensures no conduction during normal 48 V operation; 125 V VC prevents downstream DC-DC converter failure. |
Use Scenario: Board-level ESD protection on USB 2.0 D+/D- lines in smart speakers and set-top boxes. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at USB connector to shunt ±15 kV HBM ESD events. Use Value: Sub-1 ns response and 125 V clamping prevent data corruption and PHY latch-up during consumer-handling ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Higher VBR (85.5–94.5 V), same VC = 125 V, but 600 W PPPM in SMB package | Larger footprint (SMB vs. SMA); better suited for higher-energy surges where board space allows | Select when 600 W surge margin is required and PCB layout accommodates 3.5 mm × 3.5 mm pads |
| 1.5KE91CA | Same VBR/VC, but through-hole DO-201 package, 1500 W PPPM, higher RθJA (~50 °C/W) | Not SMT-compatible; used in legacy or high-reliability through-hole designs with heatsinking | Choose only for through-hole assembly or where 1.5 kW surge rating justifies manual placement and larger board area |
Compared with P4SMA91CA-E3/61, SMBJ90CA offers 50 % higher surge power in a slightly larger SMT package, while 1.5KE91CA trades miniaturization for 3.75× higher PPPM and through-hole mounting - making P4SMA91CA-E3/61 optimal for space-constrained, high-volume SMT automotive and industrial designs requiring balanced clamping performance and manufacturability.
Availability
P4SMA91CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom line card surge protection, and consumer USB port ESD guard circuits requiring stable component supply, RoHS compliance, and AEC-Q101 traceability options.
Supply support for P4SMA91CA-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume surface-mount transient suppression in automotive, industrial, and communications equipment - engineered for robustness in harsh environments and compatibility with automated manufacturing.
FAQ
What is the breakdown voltage tolerance of P4SMA91CA-E3/61?
The P4SMA91CA-E3/61 has a specified breakdown voltage range of 86.5 V to 95.5 V at test current IT = 1.0 mA, representing ±5 % tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level surge margin calculations in designs using P4SMA91CA-E3/61.
Is P4SMA91CA-E3/61 suitable for automotive applications?
Yes - while the base P4SMA91CA-E3/61 is commercial-grade RoHS-compliant, Vishay offers the AEC-Q101-qualified variant P4SMA91CAHE3_A (same electrical specs, HE3 suffix). The P4SMA91CA-E3/61 itself shares identical construction, thermal performance (TJ max = 150 °C), and MSL Level 1 rating, making it widely adopted in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces where P4SMA91CA-E3/61 meets functional reliability requirements.
How does the clamping voltage of P4SMA91CA-E3/61 compare to its breakdown voltage?
The P4SMA91CA-E3/61 clamps to 125 V at its rated peak pulse current (IPPM = 3.2 A), yielding a clamping ratio (VC/VBR) of approximately 1.31 based on nominal VBR = 91 V. This low ratio reflects efficient silicon junction design and ensures minimal overvoltage stress on protected circuitry - a key advantage of P4SMA91CA-E3/61 versus older TVS families with ratios >1.4.
What is the maximum operating temperature for P4SMA91CA-E3/61?
The P4SMA91CA-E3/61 has a maximum junction temperature (TJ max) of +150 °C and operates across -65 °C to +150 °C. Its thermal resistance RθJA = 120 °C/W assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads; derating curves in the datasheet confirm usable power dissipation down to ambient temperatures below -40 °C, making P4SMA91CA-E3/61 suitable for under-hood and industrial outdoor deployments.
Does P4SMA91CA-E3/61 require polarity-aware PCB layout?
No - the "CA" suffix denotes bidirectional configuration, meaning the P4SMA91CA-E3/61 has no anode/cathode distinction and exhibits identical clamping characteristics in both voltage polarities. The device carries no polarity marking on the SMA (DO-214AC) package, simplifying PCB layout and eliminating orientation errors during automated placement - a key reliability benefit of P4SMA91CA-E3/61 in high-speed manufacturing.
P4SMA91CA-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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
P4SMA91CA-E3/61 FAQ
1.How can I place an order for P4SMA91CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CA-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 P4SMA91CA-E3/61 reliable?
The price and inventory of P4SMA91CA-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 P4SMA91CA-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA91CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CA-E3/61?
P4SMA91CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CA-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 P4SMA91CA-E3/61?
For technical support, including P4SMA91CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CA-E3/61 requirements.
6.How does Aetrix verify that P4SMA91CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA91CA-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 P4SMA91CA-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA91CA-E3/61?
All P4SMA91CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CA-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 P4SMA91CA-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA91CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA91CA-E3/61 Tags
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