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Vishay General Semiconductor - Diodes Division P6SMB9.1A-M3/5B
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- Part No.:
- P6SMB9.1A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB9.1A-M3/5B.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,839
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Product details
Overview
P6SMB9.1A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) 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 stand-off voltage (VWM), 13.4 V maximum clamping voltage (VC) at 44.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used in automotive sensor protection, industrial I/O interfaces, and DC power rail surge suppression.
For engineers reviewing the P6SMB9.1A-M3/5B datasheet, P6SMB9.1A-M3/5B pinout, P6SMB9.1A-M3/5B application, or P6SMB9.1A-M3/5B equivalent, key selection criteria include unidirectional polarity, SMB package thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility (via HM3 suffix), halogen-free RoHS compliance, and clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<50 μA at VWM), while the low incremental surge resistance enables rapid energy dissipation during transient events.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2 of the datasheet. With a fast response time (<1.0 ns) and MSL Level 1 moisture sensitivity, it supports high-reliability automated SMT assembly without pre-baking.
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 window for reliable overvoltage detection |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 13.4 V at 44.8 A - clamped voltage seen by protected circuit during worst-case 600 W transient |
| PPPM | 600 W with 10/1000 μs waveform - peak surge handling capacity for lightning or ESD-like events |
| IPPM | 44.8 A - maximum non-repetitive surge current the device safely conducts without failure |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout and power derating |
| TJ max | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts avalanche current when VREV > VBR |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or lower-potential rail to complete clamping path |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation in SMB footprint |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| AEC-Q101 qualification option | HM3 suffix variant available for automotive-grade reliability validation in safety-critical ECUs |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and chassis ground, activated within nanoseconds of overvoltage event. Use Value: Limits transient voltage to ≤13.4 V, preventing damage to 5 V or 3.3 V interface ICs while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and electrostatic discharge in factory automation systems. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, absorbing repetitive 600 W pulses from relay coil flyback or motor commutation noise. Use Value: Enables robust operation in harsh industrial environments with no additional series impedance or timing delay on control signals. |
| DC Power Rail Surge Suppression | Consumer Device USB Port Protection |
Use Scenario: Clamping voltage spikes on 12 V or 24 V DC power distribution networks feeding microcontrollers, displays, and motor drivers in embedded equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS across supply rail and ground, conducting only during overvoltage excursions above 7.78 V. Use Value: Prevents brownout or latch-up in downstream regulators and logic ICs during load-switching events without affecting steady-state efficiency. |
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes, printers, and smart home hubs. IC Role / Device Role / Timing Role: Fast-response clamp limiting transient voltage to safe levels before integrated USB PHY or controller sustains damage. Use Value: Complements internal IC protection by handling higher-energy discharges (IEC 61000-4-2 Level 4) with sub-ns response and minimal capacitance impact. |
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 | Same SMB package, slightly lower VBR (8.55–9.45 V), identical 600 W rating, but not halogen-free (E3 suffix only) | Lacks halogen-free certification; not qualified for automotive use even with HE3 suffix | Select when halogen-free compliance is not required and cost optimization is prioritized over environmental specification |
| 1.5SMC9.1A | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass (RθJA ≈ 60 °C/W), higher IFSM (200 A) | Better thermal performance for high-duty-cycle surges; requires larger PCB area and different stencil design | Choose when board space allows and enhanced surge endurance beyond 600 W single-event requirement is needed |
Compared with SMAJ9.0A and 1.5SMC9.1A, the P6SMB9.1A-M3/5B uniquely combines halogen-free construction, MSL Level 1 compatibility, and AEC-Q101 upgrade path in the compact SMB footprint - making it optimal for space-constrained, environmentally regulated, and automotive-adjacent designs where both reliability and regulatory compliance are mandatory.
Availability
P6SMB9.1A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 upgrade readiness.
Supply support for P6SMB9.1A-M3/5B 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The P6SMB Series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust, standardized transient suppression in space-constrained surface-mount applications across automotive, industrial, and consumer electronics.
FAQ
What is the breakdown voltage tolerance of P6SMB9.1A-M3/5B?
The P6SMB9.1A-M3/5B has a breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, corresponding to a ±5% tolerance around the nominal 9.1 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage margining in protected circuits. The P6SMB9.1A-M3/5B maintains this specification under standard test conditions per JEDEC JESD201 and J-STD-020.
Is P6SMB9.1A-M3/5B suitable for automotive applications?
The P6SMB9.1A-M3/5B itself is commercial-grade, but its base P/NHM3 suffix indicates halogen-free and RoHS-compliant construction, and the HM3_B variant (e.g., P6SMB9.1AHM3_B) is explicitly AEC-Q101 qualified. Engineers may select the HM3_B version for automotive use; the P6SMB9.1A-M3/5B serves as the foundational commercial part with direct upgrade path. Its 150 °C TJ max and MSL Level 1 rating further support under-hood deployment when properly mounted.
What is the maximum clamping voltage of P6SMB9.1A-M3/5B under surge conditions?
The P6SMB9.1A-M3/5B exhibits a maximum clamping voltage (VC) of 13.4 V at its rated peak pulse current of 44.8 A (10/1000 μs waveform). This value represents the highest voltage imposed on the protected circuit during worst-case transient events and is guaranteed across temperature and process variation. The low VC/VBR ratio (~1.47) confirms efficient energy diversion without excessive overvoltage stress on downstream components.
Does P6SMB9.1A-M3/5B require special PCB layout considerations?
Yes - the P6SMB9.1A-M3/5B must be mounted on minimum recommended copper pads (0.2" × 0.2" / 5.0 mm × 5.0 mm per terminal) to achieve its specified 600 W pulse rating and thermal resistance (RθJA = 100 °C/W). Reduced pad area increases junction temperature rise and degrades surge capability. Layout must also minimize trace inductance between cathode/anode and protected node/ground to preserve sub-ns response time. The P6SMB9.1A-M3/5B datasheet provides exact pad dimensions in inches and millimeters.
How does the M3 suffix affect P6SMB9.1A-M3/5B compliance status?
The M3 suffix on P6SMB9.1A-M3/5B denotes halogen-free, RoHS-compliant construction per IEC 61249-2-21 and Vishay's material categorization standard. Unlike E3-suffix variants, M3 ensures brominated flame retardants and chlorine-based compounds are excluded from molding compound and plating. This makes P6SMB9.1A-M3/5B suitable for environmentally regulated markets including EU WEEE, China RoHS II, and automotive OEM sustainability requirements - without sacrificing electrical or thermal performance.
P6SMB9.1A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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):
- 44.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
P6SMB9.1A-M3/5B FAQ
1.How can I place an order for P6SMB9.1A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB9.1A-M3/5B 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 P6SMB9.1A-M3/5B reliable?
The price and inventory of P6SMB9.1A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB9.1A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB9.1A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB9.1A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB9.1A-M3/5B?
P6SMB9.1A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB9.1A-M3/5B 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 P6SMB9.1A-M3/5B?
For technical support, including P6SMB9.1A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB9.1A-M3/5B requirements.
6.How does Aetrix verify that P6SMB9.1A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB9.1A-M3/5B 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 P6SMB9.1A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB9.1A-M3/5B?
All P6SMB9.1A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB9.1A-M3/5B, 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 P6SMB9.1A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB9.1A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB9.1A-M3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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