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Vishay General Semiconductor - Diodes Division P6SMB9.1CAHM3_A/H
- Part No.:
- P6SMB9.1CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB9.1CAHM3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,068
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Product details
Overview
P6SMB9.1CAHM3_A/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 - used in automotive sensor interface protection per AEC-Q101 qualification.
For engineers reviewing the P6SMB9.1CAHM3_A/H datasheet, P6SMB9.1CAHM3_A/H pinout, P6SMB9.1CAHM3_A/H application, or P6SMB9.1CAHM3_A/H equivalent, this device delivers verified bidirectional surge suppression with halogen-free, RoHS-compliant construction, MSL Level 1 moisture sensitivity, and validated performance across -65 °C to +150 °C junction temperature range.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional CA configuration, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50 µA at VWM), while the 600 W peak pulse power rating (10/1000 µs) supports repetitive transient events at 0.01% duty cycle.
The device exhibits fast response time (<1 ns), low incremental surge resistance, and thermal resistance of RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), allowing effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal - critical for sustained reliability in automotive and industrial environments.
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 overvoltage events |
| Stand-off Voltage VWM | 7.78 V - maximum continuous reverse working voltage before significant leakage begins |
| Clamping Voltage VC | ≤13.4 V at 44.8 A IPPM - actual voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power PPPM | 600 W (10/1000 µs waveform) - energy-handling capability for transient suppression without failure |
| Operating Temperature Range | -65 °C to +150 °C - enables use in under-hood automotive, industrial control, and outdoor electronics |
| Package | SMB (DO-214AA) - standardized surface-mount footprint compatible with automated placement and reflow |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 22-B102 solderability requirements. Bidirectional construction means no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as bidirectional avalanche junctions - no fixed anode/cathode; connects across protected line and return |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded lines without polarity concerns |
| 600 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 pulse 1/2a/5a in automotive systems without degradation |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising performance |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning - reduces manufacturing complexity and cost |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage stress on downstream ICs like microcontrollers, transceivers, and analog front-ends |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus Protection |
|---|---|
|
Use Scenario: Protecting wheel speed, pressure, or temperature sensor outputs from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair (e.g., CAN_H/CAN_L or analog sensor output/return) to clamp ±13.4 V surges. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADC inputs while maintaining signal integrity below 13.4 V. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs against ESD and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed between differential bus lines (A/B) and ground to suppress common-mode transients up to 600 W. Use Value: Ensures communication continuity during 8 kV contact ESD events and maintains data integrity without signal distortion. |
| Consumer USB Port ESD Protection | Power Supply Input Surge Clamping |
|
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines in portable devices where primary protection resides upstream. IC Role / Device Role / Timing Role: Bidirectional TVS shunting transients between data lines to limit voltage swing to ≤13.4 V during fast-rising ESD events. Use Value: Complies with IEC 61000-4-2 Level 4 (8 kV contact) without adding capacitance that degrades 480 Mbps signaling. |
Use Scenario: Clamping input rail transients on 12 V DC power supplies feeding embedded controllers in smart meters or HVAC controls. IC Role / Device Role / Timing Role: Connected between VIN and GND to absorb 10/1000 µs surges from relay switching or motor commutation. Use Value: Limits input voltage excursions to ≤13.4 V, preventing brownout or overvoltage shutdown of downstream regulators and MCUs. |
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 | Unidirectional; VBR = 9.0–10.0 V; same SMB package but lacks bidirectional symmetry | Requires correct polarity orientation; unsuitable for AC or differential signal protection | Select only if protecting DC rails with known polarity and space-constrained layouts favoring SMA footprint |
| SMCJ9.0CA | Same bidirectional function but in larger SMC (DO-214AB) package; VBR = 9.0–10.0 V; higher PPPM = 1500 W | Higher surge capacity suits heavy industrial mains input stages, not compact automotive modules | Choose when system-level surge immunity exceeds 600 W and PCB layout allows larger 7.11 mm × 6.22 mm footprint |
Compared with SMAJ9.0A and SMCJ9.0CA, P6SMB9.1CAHM3_A/H uniquely balances AEC-Q101 qualification, bidirectional operation, SMB footprint, and 600 W capability - making it optimal for space- and reliability-critical automotive sensor nodes where polarity-agnostic protection is mandatory.
Availability
P6SMB9.1CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB port hardening, and DC power supply input clamping requiring stable component supply and full traceability.
Supply support for P6SMB9.1CAHM3_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 reliability, efficiency, and application-specific optimization.
The P6SMB Series targets robust transient suppression in automotive, industrial, and communications systems - engineered for high surge immunity, low clamping voltage, and seamless integration into automated SMT assembly lines.
FAQ
What does the "CA" suffix mean in P6SMB9.1CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration: P6SMB9.1CAHM3_A/H functions identically in both forward and reverse directions, making it ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or ungrounded lines where polarity is undefined. Unlike unidirectional variants (e.g., P6SMB9.1AHM3_A/H), it has no cathode band marking and requires no orientation during placement.
Is P6SMB9.1CAHM3_A/H qualified for automotive applications?
Yes, P6SMB9.1CAHM3_A/H is AEC-Q101 qualified - confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant construction with full automotive reliability testing (including temperature cycling, HTRB, and ESD). It is specifically rated for under-hood and body-control module use where operating temperatures reach +150 °C and surge immunity must meet ISO 7637-2 requirements.
What is the clamping voltage of P6SMB9.1CAHM3_A/H at its rated peak pulse current?
P6SMB9.1CAHM3_A/H clamps to a maximum of 13.4 V at its rated peak pulse current of 44.8 A (IPPM), measured under the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage margins during transient events.
How does the SMB (DO-214AA) package of P6SMB9.1CAHM3_A/H compare to SMA or SMC packages?
The SMB (DO-214AA) package of P6SMB9.1CAHM3_A/H measures 4.57 mm × 3.94 mm × 2.29 mm - smaller than SMC (DO-214AB) but larger than SMA (DO-214AC). It offers a balance of surge capability (600 W), board space efficiency, and compatibility with standard pick-and-place equipment. Unlike SMA, it supports higher power dissipation; unlike SMC, it saves PCB area in dense automotive modules.
Can P6SMB9.1CAHM3_A/H replace P6SMB9.1A in an existing design?
No - P6SMB9.1CAHM3_A/H is bidirectional, while P6SMB9.1A is unidirectional. Substituting them requires verifying circuit topology: P6SMB9.1CAHM3_A/H may be used across differential pairs or floating lines, but P6SMB9.1A must be oriented with cathode toward the protected side. Direct replacement risks ineffective clamping or device failure if polarity is mismatched.
P6SMB9.1CAHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for P6SMB9.1CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB9.1CAHM3_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 P6SMB9.1CAHM3_A/H reliable?
The price and inventory of P6SMB9.1CAHM3_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 P6SMB9.1CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB9.1CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB9.1CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB9.1CAHM3_A/H?
P6SMB9.1CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB9.1CAHM3_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 P6SMB9.1CAHM3_A/H?
For technical support, including P6SMB9.1CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB9.1CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB9.1CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB9.1CAHM3_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 P6SMB9.1CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB9.1CAHM3_A/H?
All P6SMB9.1CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB9.1CAHM3_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 P6SMB9.1CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB9.1CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB9.1CAHM3_A/H Tags
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