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Vishay General Semiconductor - Diodes Division P4SMA9.1A-E3/5A
- Part No.:
- P4SMA9.1A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1A-E3/5A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,057
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Product details
Overview
P4SMA9.1A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V maximum stand-off 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 in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P4SMA9.1A-E3/5A datasheet, P4SMA9.1A-E3/5A pinout, P4SMA9.1A-E3/5A application, or P4SMA9.1A-E3/5A equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, 150 °C max junction temperature, low 0.068 %/°C VBR temperature coefficient, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
The P4SMA9.1A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of sub-microsecond transients induced by relay switching or ESD.
Thermal performance is defined by RθJA = 120 °C/W (junction-to-ambient, on minimum pad layout) and RθJL = 30 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA test current - defines precise clamping onset threshold under controlled DC conditions |
| Stand-off Voltage VWM | 7.78 V maximum - ensures no conduction during normal 5 V or 9 V rail operation, preserving signal integrity |
| Clamping Voltage VC | 13.4 V at 29.9 A (10/1000 µs) - limits transient voltage seen by downstream ICs to safe levels |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - sustains high-energy surges without failure in typical industrial environments |
| Maximum Reverse Leakage ID | 50 µA at VWM - minimizes standby power loss and avoids false triggering in low-current circuits |
| Junction Temperature Range | –65 °C to +150 °C - supports deployment in under-hood automotive and factory-floor industrial applications |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity marked with cathode band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected line's lower-potential side (e.g., GND or low-voltage rail) |
| Cathode | Avalanche conduction terminal | Connected to protected line's higher-potential side (e.g., 5 V supply or signal line); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without derating in standard layouts |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime stress |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking - compatible with standard SMT assembly lines |
| AEC-Q101 qualification option | HE3/HM3 variants support automotive-grade reliability validation for engine control and ADAS sensor modules |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving margin for 3.3 V and 5 V logic interfaces |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground, clamping transients before they reach precision amplifier inputs. Use Value: Limits voltage excursion to ≤13.4 V during 29.9 A surges, preventing latch-up or damage to 5 V tolerant ADC front-ends. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves and motor contactors. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V DC input lines, absorbing repetitive 400 W transients without degradation. Use Value: Maintains <50 µA leakage at 24 V nominal, avoiding false triggering while surviving >100,000 surge events per MIL-STD-883H Method 3015.8. |
| Consumer Power Adapter Surge Clamping | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for USB-C PD and smart home hubs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp on 5 V/9 V output rails, coordinated with primary-side OVP for full-system redundancy. Use Value: Achieves <1 ns response time and 13.4 V clamping, keeping downstream USB-PD controllers within absolute maximum ratings during 10/1000 µs surges. |
Use Scenario: Protecting Ethernet PHYs and RS-485 transceivers in network switches and base stations from ESD (IEC 61000-4-2) and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Discrete TVS on differential pairs (e.g., TX+/TX−), referenced to local ground plane with low-inductance layout. Use Value: Delivers 400 W pulse handling with 0.068 %/°C VBR drift, ensuring consistent clamping across –40 °C to +85 °C telecom operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A (Bourns) | Higher 9.0 V nominal VBR (8.55–9.45 V), same SMA package, 600 W PPPM rating | Better suited for 9 V systems requiring tighter VBR tolerance and higher surge margin | Select SMBJ9.0A when 600 W pulse handling is required and board layout allows identical SMA footprint |
| 1.5SMC9.0A (ON Semiconductor) | Same VBR range (8.55–9.45 V), SMC (DO-214AB) package, 1500 W PPPM, larger footprint | Used where higher energy absorption is needed and PCB space permits larger SMC outline | Choose 1.5SMC9.0A for legacy designs using SMC pads or when 1500 W surge capability is mandatory |
Compared with P4SMA9.1A-E3/5A, SMBJ9.0A offers higher pulse power in the same SMA footprint but with slightly lower VBR; 1.5SMC9.0A delivers triple the power rating but requires SMC pad layout changes - making P4SMA9.1A-E3/5A optimal for cost-sensitive, space-constrained 400 W protection.
Availability
P4SMA9.1A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter secondary-side protection requiring stable component supply, RoHS-compliant commercial-grade sourcing, and 13" tape-and-reel delivery for high-volume SMT production.
Supply support for P4SMA9.1A-E3/5A 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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The P4SMA9.1A-E3/5A belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 readiness and stable parametric performance.
FAQ
What is the exact breakdown voltage range for P4SMA9.1A-E3/5A?
The P4SMA9.1A-E3/5A has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This tight ±5% tolerance ensures predictable clamping behavior in 9 V rail protection circuits and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88367).
Is P4SMA9.1A-E3/5A RoHS-compliant and halogen-free?
Yes, P4SMA9.1A-E3/5A carries the "E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications. It is not halogen-free; for halogen-free compliance, the "M3" variant (e.g., P4SMA9.1A-M3/5A) must be selected - both meet JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 requirements.
Does P4SMA9.1A-E3/5A have AEC-Q101 qualification?
The base P4SMA9.1A-E3/5A is not AEC-Q101 qualified; however, Vishay offers AEC-Q101 versions under the HE3 and HM3 suffixes (e.g., P4SMA9.1AHE3_A). These automotive-grade variants share identical electrical specs and SMA packaging but undergo additional stress testing per AEC-Q101 Rev D, making them suitable for engine control and ADAS applications.
What is the maximum clamping voltage of P4SMA9.1A-E3/5A under surge conditions?
The P4SMA9.1A-E3/5A exhibits a maximum clamping voltage (VC) of 13.4 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 29.9 A. This value is measured under standardized test conditions (mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events.
Can P4SMA9.1A-E3/5A be used in bidirectional configurations?
No, P4SMA9.1A-E3/5A is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., P4SMA9.1CA), which provides symmetrical clamping in both polarities and omits the polarity band. Using P4SMA9.1A-E3/5A in bidirectional circuits risks forward conduction and failure.
P4SMA9.1A-E3/5A 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA9.1A-E3/5A FAQ
1.How can I place an order for P4SMA9.1A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1A-E3/5A 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 P4SMA9.1A-E3/5A reliable?
The price and inventory of P4SMA9.1A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA9.1A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1A-E3/5A?
P4SMA9.1A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1A-E3/5A 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 P4SMA9.1A-E3/5A?
For technical support, including P4SMA9.1A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1A-E3/5A requirements.
6.How does Aetrix verify that P4SMA9.1A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1A-E3/5A 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 P4SMA9.1A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA9.1A-E3/5A?
All P4SMA9.1A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1A-E3/5A, 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 P4SMA9.1A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA9.1A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1A-E3/5A Tags
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