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Vishay General Semiconductor - Diodes Division P6SMB12CAHM3_B/H
- Part No.:
- P6SMB12CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12CAHM3_B/H.pdf
- Description:
- 600W,12V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,878
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Product details
Overview
P6SMB12CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal and power lines. It features a 12 V standoff voltage (VWM), 16.7 V maximum clamping voltage at 35.9 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform. It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics against ESD and inductive switching surges.
For engineers reviewing the P6SMB12CAHM3_B/H datasheet, P6SMB12CAHM3_B/H pinout, P6SMB12CAHM3_B/H application, or P6SMB12CAHM3_B/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and thermal resistance of 100 °C/W junction-to-ambient under standard mounting conditions.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during transient events.
The P6SMB12CAHM3_B/H is rated for repetitive 10/1000 μs pulses at 0.01 % duty cycle and derates linearly above 25 °C ambient per Figure 2. It meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirming suitability for automotive under-hood and infotainment applications requiring long-term reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 10.2 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR (Breakdown) | 11.4 V min / 12.6 V max at 1 mA - Voltage at which device enters avalanche conduction; tight tolerance enables precise overvoltage thresholding. |
| VC (Clamping) | 16.7 V at 35.9 A IPPM - Peak voltage seen by downstream circuit during worst-case 10/1000 μs transient; critical for ensuring IC survival. |
| PPPM | 600 W - Peak pulse power handling capacity; determines survivability against lightning-induced or inductive-switching surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; guides PCB layout for thermal management. |
| TJ max | +150 °C - Maximum junction temperature; sets upper limit for ambient + self-heating in high-reliability automotive deployments. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Accepts surge current regardless of polarity; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (either direction) | Completes low-impedance path to ground or reference rail during clamping; bidirectional symmetry eliminates orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded lines without polarity concerns. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges in automotive ECUs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing per JEDEC standards. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak, eliminating bake requirements prior to assembly. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and automotive material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1). |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on sensor supply and signal outputs to prevent latch-up or damage to ADC front-ends. Use Value: Maintains signal integrity below 16.7 V clamping threshold while surviving repeated 600 W surges - extending sensor module field life in harsh under-hood environments. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs connected to long cable runs subject to EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Placed across A/B differential pair to clamp common-mode transients before they reach the transceiver's input stage. Use Value: Prevents communication lockup or permanent failure during 10/1000 μs surges up to 35.9 A - ensuring uptime in mission-critical industrial networks. |
| Consumer USB Port ESD Protection | Power Supply Input Stage |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in smart home hubs against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Fast-response bidirectional suppressor placed immediately at connector to shunt ESD current before it reaches USB PHY. Use Value: Sub-1 ns response and 16.7 V clamping limit ensure USB data eye remains undistorted during ±8 kV contact discharge per IEC 61000-4-2. |
Use Scenario: Secondary-level surge suppression on 12 V DC input rails of embedded controllers after primary MOV or fuse protection. IC Role / Device Role / Timing Role: Final-clamp device limiting residual voltage spikes to ≤16.7 V to protect downstream LDOs, microcontrollers, and memory. Use Value: 600 W rating absorbs residual energy missed by upstream protection, preventing cumulative degradation of 3.3 V logic supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Same SMB package, 12 V VWM, but lower PPPM (400 W) and higher VC (20.1 V at 25.6 A); not AEC-Q101 qualified. | Limited to commercial-grade consumer/industrial use; insufficient for automotive load dump immunity. | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable. |
| 1.5KE12CA | Through-hole DO-201 package, same 12 V VWM and 600 W rating, but larger footprint and higher RθJA (~50 °C/W on FR-4 only). | Requires PCB real estate and wave-solder process; unsuitable for high-density SMT designs. | Choose only if legacy through-hole assembly is mandated or thermal pad area is severely constrained. |
Compared with SMAJ12CA and 1.5KE12CA, the P6SMB12CAHM3_B/H uniquely combines AEC-Q101 qualification, 16.7 V low-clamping performance, and SMB footprint - making it the optimal choice for space-constrained, automotive-grade transient protection where reliability and board density are jointly critical.
Availability
P6SMB12CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 gateways, and consumer USB hub designs requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for P6SMB12CAHM3_B/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 high-reliability, automotive-qualified components.
The P6SMB series was developed specifically for robust, surface-mount transient suppression in automotive and industrial systems - balancing high pulse power, low clamping, and stringent qualification standards.
FAQ
What is the clamping voltage of the P6SMB12CAHM3_B/H under maximum surge conditions?
The P6SMB12CAHM3_B/H has a maximum clamping voltage (VC) of 16.7 V at 35.9 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the highest voltage that will appear across protected circuitry during a worst-case transient event. The P6SMB12CAHM3_B/H maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is the P6SMB12CAHM3_B/H suitable for automotive applications?
Yes, the P6SMB12CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from −65 °C to +150 °C junction temperature and validated for thermal cycling, mechanical shock, and humidity bias - making the P6SMB12CAHM3_B/H appropriate for engine control units, body electronics, and ADAS sensor interfaces.
Does the P6SMB12CAHM3_B/H require orientation during PCB placement?
No, the P6SMB12CAHM3_B/H is a bidirectional TVS diode with symmetrical electrical characteristics in both directions, and its SMB (DO-214AA) package has no polarity marking. This means the P6SMB12CAHM3_B/H can be placed in either orientation on the PCB without affecting clamping performance - simplifying automated assembly and reducing placement errors in high-volume manufacturing.
What is the thermal resistance of the P6SMB12CAHM3_B/H, and how does it affect layout?
The P6SMB12CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly informs PCB layout: to maintain TJ ≤ 150 °C under full 5.0 W steady-state dissipation, ambient must stay below 100 °C - so the P6SMB12CAHM3_B/H requires adequate copper area and airflow in thermally demanding applications.
How does the P6SMB12CAHM3_B/H compare to unidirectional variants like P6SMB12AHM3_B/H?
The P6SMB12CAHM3_B/H differs from unidirectional versions (e.g., P6SMB12AHM3_B/H) solely in polarity: it clamps symmetrically in both directions, while unidirectional types conduct only in reverse bias and block forward current. The P6SMB12CAHM3_B/H is required for AC-coupled or floating lines (e.g., CAN, RS-485), whereas unidirectional variants suit DC power rails where polarity is fixed and forward conduction must be blocked.
P6SMB12CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 35.9A
- 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)
P6SMB12CAHM3_B/H FAQ
1.How can I place an order for P6SMB12CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12CAHM3_B/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 P6SMB12CAHM3_B/H reliable?
The price and inventory of P6SMB12CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB12CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12CAHM3_B/H?
P6SMB12CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12CAHM3_B/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 P6SMB12CAHM3_B/H?
For technical support, including P6SMB12CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB12CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB12CAHM3_B/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 P6SMB12CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB12CAHM3_B/H?
All P6SMB12CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12CAHM3_B/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 P6SMB12CAHM3_B/H part is unused and in its original packaging.
Return procedure for P6SMB12CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB12CAHM3_B/H Tags
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