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Vishay General Semiconductor - Diodes Division P4SMA9.1AHM3/H
- Part No.:
- P4SMA9.1AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1AHM3/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,831
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Product details
Overview
P4SMA9.1AHM3/H 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 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 power supplies.
For engineers reviewing the P4SMA9.1AHM3/H datasheet, P4SMA9.1AHM3/H pinout, P4SMA9.1AHM3/H application, or P4SMA9.1AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
The P4SMA9.1AHM3/H operates as a unidirectional clamping device with glass-passivated junction, enabling fast response to transient overvoltages induced by inductive switching or ESD events. Its thermal resistance is RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = +150 °C with derating above 25 °C ambient.
It meets MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C), uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing. The cathode band denotes polarity, and its DO-214AC outline ensures compatibility with standard SMA footprint layouts.
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 |
| Standoff Voltage VWM | 7.78 V maximum - ensures reliable non-conduction during normal 5–7 V supply or signal line operation |
| 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) - sustains high-energy surges without failure when mounted on 5.0 mm × 5.0 mm copper pads |
| Operating Temperature | −65 °C to +150 °C junction range - supports under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive electronics reliability including temperature cycling and HTRB |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.54 mm lead pitch and 5.28 mm body length |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads; cathode indicated by band; terminals are anode and cathode - no internal circuitry beyond PN junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line's lower-potential side (e.g., GND or return path) |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line's higher-potential side (e.g., VIN, signal rail); clamps to this node during transients |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12 V systems |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualified (HM3) | Validated for automotive use including HTGB, TC, and H3TRB - suitable for ADAS and body control modules |
| MSL Level 1 (260 °C peak) | Supports single-reflow SMT assembly without moisture sensitivity concerns or baking requirements |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A reporting requirements for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes up to ±100 V. Use Value: Limits voltage to ≤13.4 V during 400 W surges, preventing damage to MCU power rails and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb sub-100 ns transients. Use Value: Maintains signal integrity with <1 nF junction capacitance and clamps to 13.4 V before op-amp input stages saturate. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Safeguarding AC/DC adapter primary-side controllers from surge coupling via mains input. IC Role / Device Role / Timing Role: Mounted across bulk capacitor input to suppress differential-mode transients. Use Value: Withstands 29.9 A peak current at 13.4 V clamping, preserving controller IC lifetime under repeated surge stress. |
Use Scenario: Securing -48 V telecom power feeds against lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Unidirectional TVS installed between -48 V rail and chassis ground. Use Value: Delivers 400 W pulse handling at elevated ambient temperatures, meeting GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | VBR = 9.0–10.0 V; VC = 14.4 V at 27.7 A; same SMA package but not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial-grade power supplies only | Select SMAJ9.0A only if AEC-Q101 is not required and clamping voltage margin allows 1.0 V higher VC |
| 1.5SMC9.0A | VBR = 9.0–10.0 V; VC = 14.4 V at 27.7 A; larger SMC (DO-214AB) package with higher thermal mass | Requires PCB layout change; better for >100 °C ambient but incompatible with dense SMA footprints | Choose 1.5SMC9.0A when board space permits and higher thermal dissipation (>3.3 W) is needed |
Compared with SMAJ9.0A and 1.5SMC9.0A, the P4SMA9.1AHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, and strict SMA footprint compatibility - making it the only drop-in solution for automotive SMT production where both reliability and assembly process alignment are mandatory.
Availability
P4SMA9.1AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feed circuits requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA9.1AHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-performance components for automotive and industrial markets.
The P4SMA series targets cost-sensitive yet reliability-critical transient protection applications, delivering standardized SMA-packaged TVS diodes with AEC-Q101 options, tight VBR tolerances, and optimized surge robustness for 12 V and 24 V systems.
FAQ
What is the exact breakdown voltage range for P4SMA9.1AHM3/H?
The P4SMA9.1AHM3/H 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 standards. This specification is confirmed in the Vishay P4SMA datasheet revision 09-Jan-2024, page 2, and applies directly to the P4SMA9.1AHM3/H variant with HM3 halogen-free AEC-Q101 qualification.
Is P4SMA9.1AHM3/H suitable for automotive applications?
Yes, P4SMA9.1AHM3/H is AEC-Q101 qualified (HM3 suffix), tested for high-temperature reverse bias, temperature cycling, and highly accelerated life testing per automotive reliability standards. It is explicitly rated for under-hood and body electronics use, including engine control modules and ADAS sensor interfaces where transient immunity and long-term stability are critical.
What does the "HM3" suffix indicate in P4SMA9.1AHM3/H?
The "HM3" suffix in P4SMA9.1AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with JESD 201 Class 2 whisker resistance, MSL Level 1 reflow capability, and automotive-grade traceability requirements.
What is the maximum clamping voltage of P4SMA9.1AHM3/H under surge conditions?
The P4SMA9.1AHM3/H clamps to a maximum of 13.4 V at 29.9 A peak pulse current with a 10/1000 µs waveform, as specified in the Vishay P4SMA datasheet (page 2). This value is measured under standard mounting conditions (0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events.
Can P4SMA9.1AHM3/H replace P4SMA9.0A in existing designs?
No direct replacement is assured: P4SMA9.1AHM3/H has VBR = 8.65–9.55 V and VWM = 7.78 V, while P4SMA9.0A (if extant) would target ~9.0 V nominal - but Vishay's official P4SMA lineup starts at P4SMA6.8A and increments by 0.1–0.2 V steps. P4SMA9.1AHM3/H is the only 9.1 V variant offered with HM3 qualification, so substitution requires validation of VWM margin and clamping performance in the specific application.
P4SMA9.1AHM3/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:
- 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:
- 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/H FAQ
1.How can I place an order for P4SMA9.1AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1AHM3/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/H reliable?
The price and inventory of P4SMA9.1AHM3/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/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1AHM3/H?
P4SMA9.1AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1AHM3/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/H?
For technical support, including P4SMA9.1AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1AHM3/H requirements.
6.How does Aetrix verify that P4SMA9.1AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1AHM3/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/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1AHM3/H?
All P4SMA9.1AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1AHM3/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/H part is unused and in its original packaging.
Return procedure for P4SMA9.1AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1AHM3/H Tags
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