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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHE3/5A
- Part No.:
- P4SMA9.1CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHE3/5A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,073
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Product details
Overview
P4SMA9.1CAHE3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V maximum standoff voltage (VWM), 13.4 V clamping voltage (VC) at 29.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the P4SMA9.1CAHE3/5A datasheet, P4SMA9.1CAHE3/5A pinout, P4SMA9.1CAHE3/5A application, or P4SMA9.1CAHE3/5A equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), junction temperature range (–65 to +150 °C), and bidirectional clamping behavior confirmed per Vishay Document 88367 (Rev. 09-Jan-2024).
Technical Context
P4SMA9.1CAHE3/5A operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling transient suppression on AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50 µA at VWM), while the SMA package supports automated placement and meets MSL Level 1 (peak reflow 260 °C).
The device delivers 400 W peak pulse power (10/1000 µs) up to 91 V, derating to 300 W above that threshold, and exhibits fast response time (<1.0 ns) with low incremental surge resistance. It is AEC-Q101 qualified (HE3 suffix), RoHS-compliant, halogen-free optional, and rated for continuous power dissipation of 3.3 W on infinite heatsink at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 µA |
| VC at IPPM | 13.4 V at 29.9 A - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity for repetitive transients at ≤0.01% duty cycle |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout design |
| TJ Range | –65 °C to +150 °C - operating and storage temperature envelope supporting automotive under-hood use |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | One terminal of symmetrical avalanche junction; connects to line being protected |
| Cathode | Transient current entry (positive half-cycle) | Second terminal of symmetrical junction; ties to same reference as Anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded lines without polarity concerns |
| 400 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without degradation |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, temperature cycling, and mechanical shock |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; peak temperature tolerance up to 260 °C |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage stress on downstream ICs during ESD or load dump events |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from load dump and ESD in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across signal pair or signal-to-ground to clamp transients before they reach MCU ADC or transceiver inputs. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V system, 100 V/1 s) and IEC 61000-4-2 ±25 kV contact discharge. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing inductive kickback energy from solenoid or motor driver outputs. Use Value: Limits voltage excursion to ≤13.4 V during 400 W surges, preventing latch-up or gate oxide damage in input buffer ICs. |
| Consumer Audio Line Protection | Telecom DSL/ADSL Line Interface |
|
Use Scenario: Shielding line-level audio inputs (RCA, 3.5 mm jack) in AV receivers from ESD and nearby lightning-induced coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed between connector and op-amp input stage. Use Value: Clamps ±8 kV ESD pulses within <1 ns while adding <1 pF parasitic capacitance - preserving audio bandwidth up to 20 kHz. |
Use Scenario: Front-end protection of ADSL splitter and line driver circuits against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary surge arrestor mounted at line entry point, upstream of transformer and PHY IC. Use Value: Withstands 10/1000 µs surges up to 29.9 A while maintaining VWM = 7.78 V - compatible with -48 V DC bias and AC signaling envelopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Higher VBR (8.5–9.4 V), lower VC (14.4 V at 27.8 A), SMB package (DO-214AA), 600 W PPPM | Requires larger PCB footprint; better suited for higher-power industrial surge standards (IEC 61000-4-5) | Select when higher surge margin or lower clamping voltage is prioritized over space-constrained layouts |
| 1.5SMC9.0CA | Same VBR/VC specs, SMC package (DO-214AB), 1500 W PPPM, RθJA = 100 °C/W | Larger thermal mass enables sustained surge handling but incompatible with fine-pitch SMA footprints | Choose for legacy designs using SMC or where 1.5 kW surge rating is mandated by end-equipment safety certification |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, P4SMA9.1CAHE3/5A offers the smallest footprint (SMA), AEC-Q101 qualification out-of-box, and optimized thermal performance for high-density automotive PCBs - making it preferred for space-constrained, automotive-grade signal line protection where 400 W surge capability suffices.
Availability
P4SMA9.1CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer audio inputs, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and consistent lead-time visibility.
Supply support for P4SMA9.1CAHE3/5A 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 performance.
The P4SMA Series is engineered for robust transient suppression in automotive, industrial, and communications equipment - delivering standardized, AEC-Q101-qualified TVS solutions in compact surface-mount packages for signal and power rail protection.
FAQ
What does the "CA" suffix indicate in P4SMA9.1CAHE3/5A?
The "CA" suffix in P4SMA9.1CAHE3/5A denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both polarities - essential for protecting AC-coupled lines, differential buses, or ungrounded signal paths without polarity constraints. This differs from "A"-suffixed unidirectional variants, which require correct cathode orientation relative to ground.
Is P4SMA9.1CAHE3/5A qualified for automotive applications?
Yes, P4SMA9.1CAHE3/5A is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay Document 88367. It has undergone stress testing including high-temperature operating life (HTOL), temperature cycling, and ESD per JESD22-A114, making it suitable for under-hood and body-control module applications in passenger vehicles and commercial vehicles.
What is the maximum clamping voltage of P4SMA9.1CAHE3/5A under surge conditions?
The maximum clamping voltage (VC) of P4SMA9.1CAHE3/5A is 13.4 V at 29.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and represents the highest voltage imposed on the protected circuit during a worst-case transient event.
How does the SMA package of P4SMA9.1CAHE3/5A compare to SMB or SMC alternatives?
The SMA (DO-214AC) package of P4SMA9.1CAHE3/5A measures 4.50 mm × 3.99 mm × 2.29 mm - smaller than SMB (DO-214AA) and significantly smaller than SMC (DO-214AB). This enables high-density PCB layouts in space-constrained applications like automotive ADAS sensors or portable telecom equipment, while maintaining full 400 W surge capability and AEC-Q101 qualification.
What is the standoff voltage rating for P4SMA9.1CAHE3/5A, and why does it matter?
The maximum standoff voltage (VWM) for P4SMA9.1CAHE3/5A is 7.78 V - the highest DC or RMS voltage the device can block continuously without exceeding 50 µA leakage current. This rating ensures compatibility with 5 V and 3.3 V logic systems, 12 V automotive supplies, and low-voltage sensor interfaces, preventing false triggering during normal operation.
P4SMA9.1CAHE3/5A 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
P4SMA9.1CAHE3/5A FAQ
1.How can I place an order for P4SMA9.1CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHE3/5A 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 P4SMA9.1CAHE3/5A reliable?
The price and inventory of P4SMA9.1CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CAHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHE3/5A?
P4SMA9.1CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHE3/5A 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 P4SMA9.1CAHE3/5A?
For technical support, including P4SMA9.1CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHE3/5A requirements.
6.How does Aetrix verify that P4SMA9.1CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHE3/5A 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 P4SMA9.1CAHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHE3/5A?
All P4SMA9.1CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHE3/5A, 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 P4SMA9.1CAHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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