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Vishay General Semiconductor - Diodes Division P4SMA9.1AHM3_A/H
- Part No.:
- P4SMA9.1AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1AHM3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,977
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Product details
Overview
P4SMA9.1AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), and 13.4 V clamping voltage (VC) at 29.9 A peak pulse current (IPPM). It delivers 400 W peak pulse power (10/1000 µs waveform) and is AEC-Q101 qualified for automotive applications.
For engineers reviewing the P4SMA9.1AHM3_A/H datasheet, P4SMA9.1AHM3_A/H pinout, P4SMA9.1AHM3_A/H application, or P4SMA9.1AHM3_A/H equivalent, this device is selected for robust overvoltage protection of low-voltage signal lines, power rails, and sensor interfaces where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.47), and halogen-free RoHS compliance are critical.
Technical Context
The P4SMA9.1AHM3_A/H operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transient events. Its clamping action begins at VWM = 7.78 V and fully engages at VBR = 8.65–9.55 V, limiting downstream voltage to ≤13.4 V under 29.9 A surge.
Thermally, it features RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive-grade PCB assembly with lead-free reflow profiles up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche onset window for predictable clamping threshold |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 µA, ensuring no false triggering on 5 V or 9 V rails |
| VC @ IPPM | 13.4 V at 29.9 A - limits protected circuit voltage during 400 W transient, maintaining safe margin below 15 V IC inputs |
| IPPM | 29.9 A (10/1000 µs) - quantifies surge current handling capability on standard lightning/ESD test waveform |
| PPPM | 400 W - peak pulse power rating confirms robustness against IEC 61000-4-5 Level 4 surges when mounted on 5 mm × 5 mm copper pads |
| TJ max. | +150 °C - enables use in under-hood automotive environments and industrial enclosures without derating |
| AEC-Q101 | Qualified - validates reliability for automotive electronics including ADAS sensors, body control modules, and infotainment power supplies |
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 indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or reverse clamping | Connected to protected line (e.g., 5 V rail); must be routed with low-inductance trace to minimize VL = L·di/dt overshoot |
| Cathode | Current exit terminal during clamping; marked with band | Connected to ground or lower-potential reference; requires solid thermal pad connection to dissipate 400 W pulses |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surge events up to 4 kV on 50 Ω source impedance |
| Clamping voltage VC = 13.4 V | Provides ≥1.6 V margin below typical 15 V absolute maximum ratings of microcontrollers and analog front-ends |
| AEC-Q101 qualification & halogen-free (HM3) | Supports automotive production with full traceability, whisker resistance (JESD 201 Class 2), and green manufacturing compliance |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving protection fidelity for fast-rising ESD (IEC 61000-4-2) |
| MSL Level 1, 260 °C peak reflow | Permits standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensor outputs in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp load-dump and inductive switching spikes. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V analog front-ends during 12 V battery load-dump events (ISO 7637-2 Pulse 5a). |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to 24 V DC field wiring. IC Role / Device Role / Timing Role: Standoff-rated TVS on each opto-isolator input to suppress 400 V/100 ms transients induced by relay coil de-energization. Use Value: Maintains functional safety integrity by limiting input voltage to ≤13.4 V, well below 30 V isolation barrier ratings. |
| Consumer USB Power Line Protection | Telecom Ethernet PHY Protection |
Use Scenario: Securing 5 V VBUS line in USB-C receptacles against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary clamping device upstream of USB power delivery controller, with cathode tied to system ground. Use Value: Responds in <1 ns to ±15 kV contact ESD (IEC 61000-4-2), limiting VBUS overshoot to 13.4 V and preserving USB PD negotiation integrity. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY differential pairs in network switches and routers. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on each MDI pair (TX+/TX−, RX+/RX−), referenced to local ground plane. Use Value: Clamps common-mode surges to ≤13.4 V while preserving signal integrity via low capacitance (<100 pF at VWM), avoiding data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Breakdown range 8.55–9.45 V, VC = 14.4 V at 27.8 A, non-AEC-Q101, standard RoHS (E3) | Lower surge rating (400 W same, but IPPM reduced), no automotive qualification | Select for cost-sensitive industrial/commercial designs where AEC-Q101 is not mandated |
| 1.5SMC9.0A | Higher power (1500 W), larger SMC (DO-214AB) package, VC = 14.5 V at 103 A, commercial grade only | Requires larger PCB footprint and higher thermal mass; suited for primary-level AC/DC input protection | Choose when higher energy absorption (e.g., IEC 61000-4-5 Level 5) is required and space permits SMC package |
Compared with SMAJ9.0A and 1.5SMC9.0A, the P4SMA9.1AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and SMA footprint-making it optimal for space-constrained automotive and industrial edge nodes where reliability, regulatory compliance, and board area are jointly critical.
Availability
P4SMA9.1AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer USB power circuits, and telecom Ethernet PHY protection requiring stable component supply across extended product lifecycles.
Supply support for P4SMA9.1AHM3_A/H 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 high-reliability, automotive-grade, and industry-standard solutions.
The P4SMA Series is designed specifically for surface-mount transient voltage suppression in automotive, industrial, and consumer electronics-delivering consistent clamping performance, AEC-Q101 validation, and compact DO-214AC packaging for automated assembly.
FAQ
What is the exact breakdown voltage range for P4SMA9.1AHM3_A/H?
The P4SMA9.1AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V measured at test current IT = 1.0 mA. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining for 9 V nominal systems.
Is P4SMA9.1AHM3_A/H suitable for automotive applications?
Yes, P4SMA9.1AHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It meets automotive requirements for temperature cycling, humidity resistance, and mechanical shock-making it appropriate for engine control units, ADAS sensors, and body electronics.
What is the clamping voltage of P4SMA9.1AHM3_A/H under surge conditions?
The P4SMA9.1AHM3_A/H clamps to a maximum of 13.4 V when subjected to its rated peak pulse current of 29.9 A (10/1000 µs waveform). This value is measured per standard test conditions and provides a defined upper bound for protected circuit voltage during transient events.
Does P4SMA9.1AHM3_A/H have a bidirectional variant?
No, P4SMA9.1AHM3_A/H is unidirectional only. For bidirectional operation at the same voltage level, the equivalent part is P4SMA9.1CA (or P4SMA9.1CHM3_A/H), which features symmetrical clamping in both polarities and uses "CA" or "CHM3" suffixes instead of "A" or "AHM3".
What package type does P4SMA9.1AHM3_A/H use, and what are its key mechanical features?
P4SMA9.1AHM3_A/H uses the SMA (DO-214AC) surface-mount package: low-profile, molded plastic case with matte tin-plated leads. Key features include UL 94 V-0 flammability rating, compatibility with J-STD-020 MSL Level 1 reflow (260 °C peak), and cathode identification via molded band.
P4SMA9.1AHM3_A/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1AHM3_A/H FAQ
1.How can I place an order for P4SMA9.1AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1AHM3_A/H 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 P4SMA9.1AHM3_A/H reliable?
The price and inventory of P4SMA9.1AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1AHM3_A/H?
P4SMA9.1AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1AHM3_A/H 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 P4SMA9.1AHM3_A/H?
For technical support, including P4SMA9.1AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA9.1AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1AHM3_A/H 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 P4SMA9.1AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1AHM3_A/H?
All P4SMA9.1AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1AHM3_A/H, 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 P4SMA9.1AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA9.1AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1AHM3_A/H Tags
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