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Vishay General Semiconductor - Diodes Division P6SMB9.1AHM3_A/I
- Part No.:
- P6SMB9.1AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB9.1AHM3_A/I.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
P6SMB9.1AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, 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 stand-off voltage (VWM), and 13.4 V maximum clamping voltage (VC) at 44.8 A peak pulse current (IPPM), delivering 600 W peak pulse power with a 10/1000 μs waveform - ideal for protecting MOSFETs and ICs in automotive and industrial power supplies.
For engineers reviewing the P6SMB9.1AHM3_A/I datasheet, P6SMB9.1AHM3_A/I pinout, P6SMB9.1AHM3_A/I application, or P6SMB9.1AHM3_A/I equivalent, key selection considerations include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, SMB (DO-214AA) package thermal performance (RθJA = 100 °C/W), and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance. Its 600 W peak pulse power rating is specified under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and it maintains stable clamping performance across -65 °C to +150 °C operating junction temperature.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a low 0.068 %/°C temperature coefficient of VBR, ensuring predictable voltage threshold drift over temperature. Mounting on 0.2" × 0.2" copper pads per terminal enables effective thermal dissipation under repetitive transient stress.
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 for overvoltage protection |
| VWM | 7.78 V - maximum continuous reverse working voltage before leakage exceeds 50 μA |
| VC @ IPPM | 13.4 V at 44.8 A - peak clamped voltage during 600 W transient, limiting stress on downstream components |
| IPPM | 44.8 A - maximum non-repetitive peak pulse current supported under 10/1000 μs waveform |
| PPPM | 600 W - peak pulse power handling capability, enabling robust protection against ESD and load-switching spikes |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard PCB pad layout, guiding heatsinking requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse-biased supply rail fault) |
| Cathode | Clamping reference terminal | Marked with band; connected to higher-potential side (e.g., VCC rail); conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics, with extended temperature and reliability testing |
| Halogen-free & RoHS-compliant | HM3 suffix confirms full compliance with environmental regulations and end-of-life processing requirements |
| 600 W peak pulse power | Handles high-energy transients from inductive switching (e.g., solenoid drivers) without degradation under defined duty cycle |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to 5 V or 3.3 V logic interfaces |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and alternator ripple transients on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp positive-going surges above 13.4 V. Use Value: Prevents damage to LDO regulators and microcontrollers by limiting transient voltage to safe levels within AEC-Q100 stress limits. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to EMI and cable coupling. IC Role / Device Role / Timing Role: TVS mounted across signal and return path to shunt induced common-mode spikes before they reach ADC input stages. Use Value: Maintains signal integrity and prevents false triggering in precision measurement systems operating in electrically noisy environments. |
| Consumer DC-DC Converter Input Protection | Telecom Equipment Surge Immunity |
|
Use Scenario: Safeguarding buck converter inputs in USB-C PD adapters subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Front-end clamping device absorbing 600 W pulses before input capacitors and controller ICs. Use Value: Eliminates need for additional series impedance or slow-acting fuses, preserving fast transient response and efficiency. |
Use Scenario: Enhancing immunity of Ethernet PHY power rails and auxiliary bias supplies against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V or 5 V system rails, coordinated with secondary GDT or MOV stages. Use Value: Achieves Level 4 surge withstand (4 kV line-earth) while maintaining low standby leakage and minimal capacitance impact. |
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 | Lower VBR range (8.55–9.45 V), same SMB package, 600 W rating, but not AEC-Q101 qualified | Targeted at commercial-grade consumer and computing applications; lacks automotive reliability validation | Select when AEC-Q101 is not required and tighter VBR tolerance is acceptable |
| 1.5SMC9.1A | Same VBR/VC specs, SMC (DO-214AB) package - larger footprint (2.79 mm vs. 2.20 mm width), higher RθJA (~70 °C/W) | Used where board space allows larger package and higher thermal mass is preferred for infrequent high-energy events | Choose only if PCB layout accommodates SMC dimensions and thermal design leverages lower junction-to-lead resistance |
Compared with SMAJ9.0A, P6SMB9.1AHM3_A/I provides certified automotive reliability and halogen-free compliance; versus 1.5SMC9.1A, it offers smaller footprint and MSL Level 1 reflow compatibility at the cost of slightly reduced thermal margin on large-area pads.
Availability
P6SMB9.1AHM3_A/I is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom surge protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB9.1AHM3_A/I 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, power handling, and automotive qualification.
The P6SMB series was engineered for high-reliability transient suppression in space-constrained, thermally demanding applications - particularly automotive subsystems and industrial controls where AEC-Q101 compliance and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the P6SMB9.1AHM3_A/I under maximum rated surge current?
The P6SMB9.1AHM3_A/I has a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 44.8 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per terminal, and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The P6SMB9.1AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the P6SMB9.1AHM3_A/I suitable for automotive applications?
Yes, the P6SMB9.1AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB series datasheet (Document Number 88370, Revision 09-Jan-2024). It is specifically intended for automotive use cases including engine control units, body electronics, and infotainment power rails. The P6SMB9.1AHM3_A/I also meets MSL Level 1 reflow requirements and is halogen-free and RoHS-compliant, fulfilling Tier 1 supplier environmental and process mandates.
How does the P6SMB9.1AHM3_A/I differ from bidirectional variants like P6SMB9.1CA?
The P6SMB9.1AHM3_A/I is unidirectional, meaning it conducts only in reverse breakdown (cathode-to-anode) and blocks forward current up to its rated IF. In contrast, P6SMB9.1CA is bidirectional and symmetrical, providing clamping in both polarities - suitable for AC signal lines or differential buses. The P6SMB9.1AHM3_A/I includes a cathode band marking; bidirectional types have no polarity marking. Electrical parameters such as VBR, VC, and PPPM are identical, but circuit integration differs fundamentally.
What is the maximum operating temperature for the P6SMB9.1AHM3_A/I?
The P6SMB9.1AHM3_A/I has a maximum junction temperature (TJ) rating of +150 °C and an operating junction and storage temperature range of -65 °C to +150 °C. This allows deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating curves in the datasheet show that peak pulse power must be reduced linearly above TA = 25 °C, with 50% derating at ~100 °C ambient on standard PCB layout. The P6SMB9.1AHM3_A/I remains functional and reliable within these bounds.
Does the P6SMB9.1AHM3_A/I require external heat sinking?
No, the P6SMB9.1AHM3_A/I is designed for surface-mount operation without external heat sinking. Its thermal resistance junction-to-ambient (RθJA) is specified as 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. For continuous power dissipation, the 5.0 W steady-state rating (PD) is sufficient for leakage-limited operation; transient energy is handled via short-duration avalanche conduction. The P6SMB9.1AHM3_A/I relies on PCB copper area - not added heatsinks - for thermal management during pulse events.
P6SMB9.1AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 44.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB9.1AHM3_A/I FAQ
1.How can I place an order for P6SMB9.1AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB9.1AHM3_A/I 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 P6SMB9.1AHM3_A/I reliable?
The price and inventory of P6SMB9.1AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB9.1AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB9.1AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB9.1AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB9.1AHM3_A/I?
P6SMB9.1AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB9.1AHM3_A/I 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 P6SMB9.1AHM3_A/I?
For technical support, including P6SMB9.1AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB9.1AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB9.1AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB9.1AHM3_A/I 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 P6SMB9.1AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB9.1AHM3_A/I?
All P6SMB9.1AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB9.1AHM3_A/I, 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 P6SMB9.1AHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB9.1AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB9.1AHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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