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Vishay General Semiconductor - Diodes Division P4SMA9.1CA-M3/5A
- Part No.:
- P4SMA9.1CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CA-M3/5A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,207
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Product details
Overview
P4SMA9.1CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 9.1 V breakdown voltage (VBR), 7.78 V standoff voltage (VWM), 13.4 V maximum clamping voltage at 29.9 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates across -65 °C to +150 °C junction temperature range - deployed in sensor interface protection and automotive ECUs.
For engineers reviewing the P4SMA9.1CA-M3/5A datasheet, P4SMA9.1CA-M3/5A pinout, P4SMA9.1CA-M3/5A application, or P4SMA9.1CA-M3/5A equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, SMA (DO-214AC) package dimensions, thermal resistance data, and direct alternative part comparisons - all confirmed from Vishay's official P4SMA series documentation (Doc. #88367, Rev. 09-Jan-2024).
Technical Context
The P4SMA9.1CA-M3/5A is a glass-passivated, bidirectional TVS diode optimized for fast transient suppression with sub-nanosecond response time and low incremental surge resistance. Its symmetrical I-V characteristic enables identical clamping performance in both polarities, supporting robust protection of AC-coupled or differential signal paths without polarity concerns.
Rated for 400 W peak pulse power under 10/1000 µs waveform (derated to 300 W above 91 V), it delivers 13.4 V clamping at 29.9 A IPPM while maintaining only 50 µA max reverse leakage at 7.78 V. The device meets MSL Level 1 per J-STD-020 and is halogen-free, RoHS-compliant (M3 suffix), with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 7.78 V - maximum continuous working voltage before significant leakage; ensures no false triggering during normal operation |
| VC @ IPPM | 13.4 V at 29.9 A - clamped voltage seen by protected circuit during worst-case transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs) - energy-handling capacity for common lightning/ESD-induced surges; derates linearly above 25 °C ambient |
| IPPM | 29.9 A - peak surge current capability; determines minimum trace width and PCB copper pad sizing (0.2" × 0.2") |
| TJ Range | -65 °C to +150 °C - supports operation in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; informs derating requirements when mounted on standard FR4 without heatsink |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant (M3 suffix), with matte tin-plated leads. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band omitted for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive polarity) | Accepts surge current during positive half-cycle; connects to line being protected |
| Cathode | Transient current entry point (negative polarity) | Accepts surge current during negative half-cycle; symmetric with Anode for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC or differential interfaces |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V systems without failure |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 9–12 V buses |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports standard lead-free assembly without pre-baking |
| AEC-Q101 qualification option | M3 suffix indicates halogen-free RoHS compliance; HE3/HM3 variants available for automotive-grade reliability validation |
Applications
| Automotive Sensor Interface | 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 spikes in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal pair or supply rail to shunt transient energy before it reaches sensitive analog front-ends or communication ICs. Use Value: Limits clamped voltage to 13.4 V during 29.9 A surges - within safe operating area of 16 V-rated automotive transceivers and prevents latch-up in 5 V microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Standoff voltage (7.78 V) blocks normal 24 V DC bias while responding within <1 ns to >100 V spikes, diverting current to ground via low Rsurge. Use Value: Enables reliable operation in harsh factory environments where repeated 400 W surges occur - validated per IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Consumer Power Adapter Output | Telecom Line Card Surge Protection |
Use Scenario: Clamping output overvoltage events on 9 V wall adapters caused by feedback loop failure or rectifier short in SMPS secondary side. IC Role / Device Role / Timing Role: Placed between +9 V output and GND to clamp fault conditions before they damage connected USB peripherals or charging ICs. Use Value: Withstands 400 W pulses without degradation - maintains protection integrity across 10,000+ surge events typical in consumer product lifetime. |
Use Scenario: Secondary-side protection on DSL or Ethernet line cards exposed to lightning-induced surges coupled through isolation transformers. IC Role / Device Role / Timing Role: Bidirectional clamping across transformer secondary windings to suppress common-mode transients before reaching PHY ICs. Use Value: Symmetric VBR (8.65–9.55 V) ensures balanced clamping on differential pairs - preserves signal integrity while meeting GR-1089-CORE Level 3 surge requirements. |
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 600 W PPPM, larger SMB (DO-214AA) package (4.57 mm × 3.94 mm), 9.0 V nominal VBR (min 8.55 V) | Better suited for higher-energy transients; requires larger PCB footprint and different pad layout | Select when system-level surge testing exceeds 400 W or when board space allows larger package for margin |
| 1.5SMC9.0CA | 1500 W PPPM, DO-214AB (SMC) package (7.11 mm × 6.22 mm), same VBR range but higher thermal mass | Used in primary-side AC/DC input protection or high-reliability industrial power supplies | Choose for front-end AC line or 48 V DC bus protection where energy levels exceed P4SMA series capability |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the P4SMA9.1CA-M3/5A offers optimal balance of compact SMA footprint, 400 W surge handling, and tight 8.65–9.55 V VBR tolerance - making it preferred for space-constrained, cost-sensitive secondary-side protection in automotive and industrial edge nodes.
Availability
P4SMA9.1CA-M3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter outputs requiring stable component supply, halogen-free compliance, and consistent M3-grade manufacturing traceability.
Supply support for P4SMA9.1CA-M3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series is engineered for surface-mount transient voltage suppression in space-constrained, high-volume applications - delivering standardized 400 W surge capability, AEC-Q101 qualification options, and consistent performance across commercial and automotive temperature ranges.
FAQ
What is the breakdown voltage tolerance for P4SMA9.1CA-M3/5A?
The P4SMA9.1CA-M3/5A has a guaranteed breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, per Vishay's official datasheet (Doc. #88367). This ±5% tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 9 V nominal circuits without premature conduction.
Is P4SMA9.1CA-M3/5A suitable for automotive applications?
The P4SMA9.1CA-M3/5A itself is halogen-free and RoHS-compliant (M3 suffix), but not AEC-Q101 qualified. For automotive use, Vishay offers the P4SMA9.1CAHM3_A variant (with HM3 suffix and revision code), which adds AEC-Q101 qualification. Always verify the full ordering code - P4SMA9.1CA-M3/5A alone does not carry automotive qualification.
What is the maximum clamping voltage of P4SMA9.1CA-M3/5A under surge conditions?
The P4SMA9.1CA-M3/5A clamps to a maximum of 13.4 V at its rated peak pulse current of 29.9 A (10/1000 µs waveform). This value is measured and guaranteed per datasheet specifications, ensuring downstream components see no more than 13.4 V during transient events - well below the absolute maximum ratings of most 16 V-tolerant automotive ICs.
Does P4SMA9.1CA-M3/5A have polarity markings on the package?
No. As a bidirectional TVS, the P4SMA9.1CA-M3/5A has no cathode band or polarity marking on the SMA (DO-214AC) case. Both terminals are functionally identical - the device conducts symmetrically in either direction, simplifying PCB layout and eliminating orientation errors during automated placement.
What is the thermal resistance of P4SMA9.1CA-M3/5A, and how does it affect layout?
The P4SMA9.1CA-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on standard FR4 with recommended 0.2" × 0.2" copper pads per terminal. This means a 1 W steady-state dissipation raises junction temperature by ~120 °C - so layout must minimize sustained power, rely on pulsed operation, and avoid excessive ambient temperatures above 75 °C.
P4SMA9.1CA-M3/5A 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1CA-M3/5A FAQ
1.How can I place an order for P4SMA9.1CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CA-M3/5A 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 P4SMA9.1CA-M3/5A reliable?
The price and inventory of P4SMA9.1CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CA-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CA-M3/5A?
P4SMA9.1CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CA-M3/5A 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 P4SMA9.1CA-M3/5A?
For technical support, including P4SMA9.1CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CA-M3/5A requirements.
6.How does Aetrix verify that P4SMA9.1CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CA-M3/5A 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 P4SMA9.1CA-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CA-M3/5A?
All P4SMA9.1CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CA-M3/5A, 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 P4SMA9.1CA-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA9.1CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CA-M3/5A Tags
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