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Vishay General Semiconductor - Diodes Division P4SMA9.1AHE3/61
- Part No.:
- P4SMA9.1AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1AHE3/61.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,383
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Product details
Overview
P4SMA9.1AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V maximum 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 industrial and automotive electronics.
For engineers reviewing the P4SMA9.1AHE3/61 datasheet, P4SMA9.1AHE3/61 pinout, P4SMA9.1AHE3/61 application, or P4SMA9.1AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
The P4SMA9.1AHE3/61 employs a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and surge events. Its unidirectional architecture provides reverse-biased clamping only, with cathode band marking and no forward conduction during normal operation below VWM.
It operates within -65 °C to +150 °C junction temperature range, supports 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The device is RoHS-compliant and AEC-Q101 qualified for automotive-grade reliability.
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 clamping onset threshold under controlled DC conditions |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 29.9 A - clamped voltage during 400 W 10/1000 µs surge, limiting downstream stress |
| IPPM | 29.9 A - peak pulse current capability with 0.01% duty cycle, derated above 25 °C per Fig. 2 |
| PPPM | 400 W - surge power handling on 0.2" × 0.2" copper pads; drops to 300 W for VBR > 91 V |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout and power derating |
| TJmax | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
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. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (during surge conduction) | Connected to protected line's lower-potential side; conducts when reverse voltage exceeds VBR |
| Cathode | Clamping reference node | Marked with band; ties to system ground or common return to shunt surge energy away from ICs |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring high-reliability surge protection |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV) when properly mounted on recommended copper pads |
| Low clamping voltage ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to downstream logic-level ICs and microcontrollers |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking, reducing manufacturing complexity and cost |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for long-term field reliability |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and MCU ADC input to clamp transients before they reach sensitive front-end circuitry. Use Value: Limits voltage to ≤13.4 V during 29.9 A surges, preserving 12-bit ADC accuracy and preventing latch-up in automotive-grade microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against inductive kickback from solenoid switching. IC Role / Device Role / Timing Role: Reverse-biased across input terminals to divert surge current to common ground while maintaining 7.78 V stand-off during normal operation. Use Value: Enables reliable 24 V DC input operation with <50 µA leakage at VWM, minimizing false triggering and power loss in always-on industrial control systems. |
| Consumer Power Adapter Output | Telecom Line Interface |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs subjected to hot-plug and cable ESD events. IC Role / Device Role / Timing Role: Clamping diode connected between VOUT and GND to absorb 400 W transients without affecting regulation loop stability. Use Value: Maintains output compliance within ±5% during 10/1000 µs surges, preventing damage to connected devices and meeting UL 497B protector classification. |
Use Scenario: Protecting RS-485 transceiver pins in base station backhaul equipment from lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on each differential line (A/B) referenced to local ground plane to limit common-mode overvoltage. Use Value: Achieves <1 ns response time and 13.4 V clamping, ensuring signal integrity and preventing transceiver latch-up during 1 kV/0.5 µs fast transients. |
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 | Higher VBR (8.55–9.45 V), same SMA package but SMB (DO-214AA) footprint; 600 W PPPM rating | Requires PCB pad redesign due to larger SMB package; better suited for higher-energy surges where space allows | Select when 600 W surge margin is required and board layout permits larger footprint |
| 1.5SMC9.0A | Same VBR range, SMC (DO-214AB) package; 1500 W PPPM, RθJA = 15 °C/W | Higher thermal mass enables sustained surge handling but requires larger land pattern and manual rework compatibility | Choose for industrial motor drives needing repeated 1.5 kW surge absorption with active cooling |
Compared with P4SMA9.1AHE3/61, SMBJ9.0A offers higher surge power in a physically incompatible package, while 1.5SMC9.0A delivers 3.75× more peak power but demands significantly larger PCB area and thermal management - making P4SMA9.1AHE3/61 optimal for space-constrained AEC-Q101 automotive and consumer SMT designs.
Availability
P4SMA9.1AHE3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant SMT surge protection.
Supply support for P4SMA9.1AHE3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series targets cost-sensitive, high-volume applications requiring robust transient suppression in compact SMT packages - especially automotive, industrial, and consumer electronics where AEC-Q101 compliance and automated assembly are mandatory.
FAQ
What is the breakdown voltage tolerance for P4SMA9.1AHE3/61?
The P4SMA9.1AHE3/61 has a specified breakdown voltage (VBR) range of 8.65 V to 9.55 V at 1.0 mA test current, representing ±5% tolerance around the nominal 9.1 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports reliable design margining in automotive and industrial circuits where precise overvoltage thresholds are critical.
Is P4SMA9.1AHE3/61 suitable for bidirectional signal line protection?
No, P4SMA9.1AHE3/61 is a unidirectional TVS diode and must not be used on bidirectional signal lines such as RS-485 or USB D+/D− without external biasing. For bidirectional protection, Vishay specifies CA-suffix variants like P4SMA9.1CA. Using P4SMA9.1AHE3/61 in reverse-biased AC paths risks forward conduction and failure during negative half-cycles.
Does P4SMA9.1AHE3/61 require derating at elevated ambient temperatures?
Yes, P4SMA9.1AHE3/61 must be derated above 25 °C ambient per Figure 2 in the datasheet. Its peak pulse power drops linearly to ~240 W at 85 °C ambient and ~120 W at 125 °C when mounted on standard 0.2" × 0.2" copper pads. Designers must apply this derating to ensure reliable surge handling in under-hood or enclosed industrial environments.
What is the maximum reverse leakage current for P4SMA9.1AHE3/61 at VWM?
The maximum reverse leakage current (ID) for P4SMA9.1AHE3/61 is 50 µA at its 7.78 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-operated devices using the P4SMA9.1AHE3/61 for rail protection.
How does the AEC-Q101 qualification impact P4SMA9.1AHE3/61 usage in automotive designs?
AEC-Q101 qualification certifies that P4SMA9.1AHE3/61 has passed accelerated stress tests including temperature cycling, humidity bias, and high-temperature operating life - confirming suitability for automotive powertrain, chassis, and body electronics. This eliminates need for additional qualification testing when integrating the P4SMA9.1AHE3/61 into Tier 1 supplier BOMs targeting ISO/TS 16949 compliance.
P4SMA9.1AHE3/61 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1AHE3/61 FAQ
1.How can I place an order for P4SMA9.1AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1AHE3/61 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 P4SMA9.1AHE3/61 reliable?
The price and inventory of P4SMA9.1AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1AHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA9.1AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1AHE3/61?
P4SMA9.1AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1AHE3/61 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 P4SMA9.1AHE3/61?
For technical support, including P4SMA9.1AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1AHE3/61 requirements.
6.How does Aetrix verify that P4SMA9.1AHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1AHE3/61 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 P4SMA9.1AHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA9.1AHE3/61?
All P4SMA9.1AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1AHE3/61, 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 P4SMA9.1AHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA9.1AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1AHE3/61 Tags
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