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Vishay General Semiconductor - Diodes Division P6SMB9.1CAHM3/H
- Part No.:
- P6SMB9.1CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB9.1CAHM3/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,004
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Product details
Overview
P6SMB9.1CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power 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 clamps to ≤13.4 V at 44.8 A peak pulse current (IPPM) under 10/1000 μs waveform - enabling robust protection of sensitive ICs and MOSFETs in automotive and industrial interfaces.
For engineers reviewing the P6SMB9.1CAHM3/H datasheet, P6SMB9.1CAHM3/H pinout, P6SMB9.1CAHM3/H application, or P6SMB9.1CAHM3/H equivalent, this device delivers AEC-Q101 qualified transient suppression with halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive sensor units and industrial control signal lines.
Technical Context
The P6SMB9.1CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package provides thermal performance with RθJA = 100 °C/W and RθJL = 20 °C/W.
Rated for 600 W peak pulse power (10/1000 μs), it sustains repetitive surges at 0.01 % duty cycle and supports operating junction temperatures from –65 °C to +150 °C. The device exhibits a temperature coefficient of VBR of +0.068 %/°C and maintains ≤1.0 μA reverse leakage at VWM, ensuring minimal standby power impact in always-on circuits.
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 for bidirectional overvoltage events |
| Stand-off Voltage VWM | 7.78 V - maximum continuous reverse voltage before significant leakage, enabling safe operation below system rail |
| Clamping Voltage VC | ≤13.4 V at 44.8 A IPPM - limits downstream voltage stress during 600 W transient events |
| Peak Pulse Power PPPM | 600 W (10/1000 μs waveform) - supports high-energy ESD and load-switching surge suppression |
| Package | SMB (DO-214AA) - surface-mount footprint with 5.59 mm × 4.06 mm body, compatible with automated placement and J-STD-020 MSL Level 1 |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| RoHS & Halogen-Free | Compliant per Vishay HM3 designation - meets environmental requirements for automotive and industrial end equipment |
Pinout & Package
SMB (DO-214AA) package: 2-terminal, bidirectional device with no polarity marking; symmetrical construction enables mounting without orientation constraints. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as anode or cathode depending on transient polarity; enables universal placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Supports high-energy transients from inductive switching and lightning-induced surges without degradation |
| Low clamping voltage (13.4 V @ 44.8 A) | Minimizes voltage overshoot across protected ICs, preserving margin for 5 V or 3.3 V logic interfaces |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirement and supports standard SMT assembly processes |
| AEC-Q101 qualified (HM3 variant) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., temperature, pressure) from ESD and load-dump induced transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching MCU or signal conditioner. Use Value: Maintains signal integrity under ISO 10605 ±30 kV ESD and ISO 7637-2 pulse 1/2/5a, with <13.4 V clamping protecting 5 V tolerant receivers. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on input channel, mounted adjacent to optocoupler or Schmitt trigger input stage. Use Value: Withstands 600 W pulses and operates up to +150 °C ambient, ensuring uptime in harsh factory environments with frequent switching noise. |
| Consumer USB Port ESD Protection | Telecom Ethernet PHY Line Protection |
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Standoff-clamp TVS positioned after primary common-mode choke to handle differential-mode surges. Use Value: 7.78 V VWM allows full 5 V USB operation; 13.4 V VC prevents damage to USB transceivers rated for ≤15 V absolute max. |
Use Scenario: Protecting 10/100BASE-TX Ethernet PHY transformer center taps and data pairs from lightning-induced surges in outdoor access points. IC Role / Device Role / Timing Role: Bidirectional clamp on isolated PHY side, coordinated with gas discharge tube (GDT) on line side for multi-stage protection. Use Value: Symmetric clamping ensures equal protection for both polarities of Ethernet differential signals, preserving signal symmetry and jitter performance. |
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-E3/5B | Unidirectional; 9.0 V VBR min (8.55 V); 14.5 V VC @ 41.4 A; SMA package (smaller thermal mass) | Limited to single-polarity protection; requires correct orientation; lower peak pulse current handling | Select when unidirectional clamping suffices and board space is constrained - not suitable for AC-coupled or bidirectional signal lines. |
| 1.5KE9.1CA | Through-hole; 9.1 V VBR; 600 W rating; DO-201 package; higher RθJA (~50 °C/W on large pads) | Requires wave soldering or hand assembly; incompatible with high-density SMT layouts; slower thermal response | Choose only for legacy through-hole designs or where manual repairability outweighs automated assembly benefits. |
Compared with SMAJ9.0A-E3/5B and 1.5KE9.1CA, the P6SMB9.1CAHM3/H uniquely combines bidirectional operation, AEC-Q101 qualification, halogen-free compliance, and SMB footprint - making it the preferred choice for new automotive and industrial SMT designs requiring orientation-agnostic, high-reliability transient suppression.
Availability
P6SMB9.1CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer USB power delivery systems requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for P6SMB9.1CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under repetitive surge stress and extended temperature operation without parameter drift.
FAQ
What is the key difference between P6SMB9.1CAHM3/H and unidirectional variants like P6SMB9.1A?
The P6SMB9.1CAHM3/H is bidirectional, meaning it clamps voltage transients of either polarity symmetrically - essential for AC-coupled lines, differential buses (e.g., RS-485), or sensor outputs without defined DC bias. In contrast, P6SMB9.1A is unidirectional and must be oriented with cathode toward the protected circuit's positive rail. Both share identical VBR, VWM, and VC specs, but only P6SMB9.1CAHM3/H eliminates polarity concerns during layout and assembly.
Does P6SMB9.1CAHM3/H require orientation during PCB placement?
No - P6SMB9.1CAHM3/H has no polarity marking and functions identically regardless of orientation due to its bidirectional structure. This simplifies automated placement, reduces assembly errors, and avoids rework from incorrect diode orientation. The SMB package uses symmetrical terminals, and electrical behavior remains unchanged whether installed "left-to-right" or "right-to-left" on the board.
What does the "HM3" suffix indicate in P6SMB9.1CAHM3/H?
The "HM3" suffix in P6SMB9.1CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - confirming validation for automotive applications including temperature cycling, mechanical shock, and humidity testing. It also specifies JESD 201 Class 2 whisker resistance and MSL Level 1 handling, distinguishing it from commercial-grade "M3" or non-automotive "E3" variants of the same P6SMB9.1CA base part.
Can P6SMB9.1CAHM3/H be used in place of P6SMB9.1CAHE3/H?
Yes - both share identical electrical specifications (VBR, VWM, VC, PPPM) and SMB packaging, but P6SMB9.1CAHM3/H adds halogen-free materials and AEC-Q101 qualification, whereas P6SMB9.1CAHE3/H is RoHS-compliant and AEC-Q101 qualified but not halogen-free. Substitution is electrically safe; choose P6SMB9.1CAHM3/H when halogen-free compliance is mandated by end-equipment standards (e.g., EU automotive Tier 1 requirements).
What is the maximum allowable printed circuit board pad size for optimal thermal performance of P6SMB9.1CAHM3/H?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for P6SMB9.1CAHM3/H to achieve rated 600 W peak pulse power and thermal resistance values (RθJA = 100 °C/W). Larger pads improve heat dissipation and surge endurance; reducing pad area below this de-rates PPPM and increases junction temperature rise during transient events - potentially compromising long-term reliability in high-duty-cycle applications.
P6SMB9.1CAHM3/H 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB9.1CAHM3/H FAQ
1.How can I place an order for P6SMB9.1CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB9.1CAHM3/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 P6SMB9.1CAHM3/H reliable?
The price and inventory of P6SMB9.1CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB9.1CAHM3/H is usually 5 days.
3.What payment methods are accepted for P6SMB9.1CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB9.1CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB9.1CAHM3/H?
P6SMB9.1CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB9.1CAHM3/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 P6SMB9.1CAHM3/H?
For technical support, including P6SMB9.1CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB9.1CAHM3/H requirements.
6.How does Aetrix verify that P6SMB9.1CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB9.1CAHM3/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 P6SMB9.1CAHM3/H meets industry standards.
7.What is the process for return or replacement of P6SMB9.1CAHM3/H?
All P6SMB9.1CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB9.1CAHM3/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 P6SMB9.1CAHM3/H part is unused and in its original packaging.
Return procedure for P6SMB9.1CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB9.1CAHM3/H Tags
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