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Vishay General Semiconductor - Diodes Division P6SMB18CA-M3/52
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- Part No.:
- P6SMB18CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CA-M3/52.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,912
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Product details
Overview
P6SMB18CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 15.3 V standoff voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA, 25.2 V clamping voltage (VC) at 23.8 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB18CA-M3/52 datasheet, P6SMB18CA-M3/52 pinout, P6SMB18CA-M3/52 application, or P6SMB18CA-M3/52 equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package details, bidirectional clamping behavior, thermal derating curves, and AEC-Q101-qualified alternatives - all confirmed from Vishay's official P6SMB Series specification document (Rev. 09-Jan-2024, Doc. #88370).
Technical Context
The P6SMB18CA-M3/52 operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±17.1 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 15.3 V), while its low incremental surge resistance enables rapid energy absorption during ESD or lightning-induced surges.
Thermally, it exhibits RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant (M3 suffix), with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on across production lot and temperature. |
| VC (Clamping) | 25.2 V at 23.8 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM | 600 W - Sustained transient energy handling capacity under standardized 10/1000 μs waveform at 0.01% duty cycle. |
| IPPM | 23.8 A - Peak surge current the device safely diverts without degradation; derived directly from VC and PPPM. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline (5.59 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads; no polarity marking for bidirectional operation; terminals are anode and cathode symmetrically arranged - functionally interchangeable in AC-coupled or differential signal paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current when voltage goes negative relative to cathode; identical clamping behavior as cathode in bidirectional mode. |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current when voltage goes positive relative to anode; enables symmetrical clamping in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when properly mounted on recommended 0.2" × 0.2" copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic interfaces adjacent to protected lines. |
| AEC-Q101 qualified option | HM3 suffix variants (e.g., P6SMB18CAHM3_B/H) meet automotive reliability standards for engine control, ADAS sensors, and infotainment systems. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-J-STD-609 Category 1 material declaration requirements and supports environmentally regulated industrial and consumer designs. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and LIN nodes from load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair (CAN_H/CAN_L) or supply rail (VBAT/GND) to clamp transients before they reach interface ICs. Use Value: Limits clamped voltage to 25.2 V - well below 36 V absolute maximum rating of common CAN transceivers - preventing latch-up or permanent damage. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and ESD events. IC Role / Device Role / Timing Role: Placed across input terminals (IN+/IN−) to shunt induced transients away from precision op-amps and ADC front-ends. Use Value: Fast response (<1 ns) and low leakage (<1 μA) preserve signal integrity and measurement accuracy while absorbing >600 W surge energy. |
| Telecom Line Interface | Consumer USB Port ESD |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Used in conjunction with gas discharge tubes (GDTs) as secondary clamping stage on RJ45 jack side of isolation transformer. Use Value: Clamps residual surge to ≤25.2 V after GDT fires, protecting 2.5 V/3.3 V PHY ICs rated for <30 V absolute maximum. |
Use Scenario: Adding system-level ESD immunity to USB 2.0 data lines (D+/D−) in smart home hubs and portable media devices. IC Role / Device Role / Timing Role: Bidirectional placement across D+ and D− pins to suppress ±8 kV contact / ±15 kV air-gap ESD per IEC 61000-4-2. Use Value: Junction capacitance <100 pF (typ.) avoids signal integrity degradation at 480 Mbps, while 25.2 V clamping protects USB transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM (15.3 V), lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (140 °C/W) | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when board space allows larger footprint and surge energy requirements are ≤400 W. |
| P6SMB18CAHM3_B/H | Identical electrical specs; AEC-Q101 qualified, HM3 halogen-free, B revision code, 7" tape/reel (H) | Required for automotive production; supports PPAP documentation and extended temperature validation. | Choose for OEM automotive programs where qualification and traceability are mandatory. |
Compared with SMAJ18CA, P6SMB18CA-M3/52 delivers 50% higher surge power handling and better thermal performance in the same PCB area; versus P6SMB18CAHM3_B/H, it shares full electrical compatibility but lacks AEC-Q101 certification - making it ideal for industrial and commercial designs where qualification overhead is unnecessary.
Availability
P6SMB18CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line protection, and consumer USB port ESD requiring stable component supply, halogen-free compliance, and SMB footprint consistency.
Supply support for P6SMB18CA-M3/52 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 high-energy transient suppression in space-constrained applications - engineered for automotive, industrial, and telecom systems needing robust, bidirectional, surface-mount TVS solutions with industry-standard SMB packaging.
FAQ
What is the clamping voltage of P6SMB18CA-M3/52 at its rated peak pulse current?
The P6SMB18CA-M3/52 has a maximum clamping voltage (VC) of 25.2 V at 23.8 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Vishay's test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The P6SMB18CA-M3/52 maintains this clamping performance across its specified operating temperature range.
Is P6SMB18CA-M3/52 suitable for automotive applications?
P6SMB18CA-M3/52 is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For non-safety-critical automotive subsystems (e.g., infotainment USB ports or cabin sensor interfaces), it may be used with proper system-level validation. However, for engine bay, ADAS, or powertrain applications, the AEC-Q101-qualified variant P6SMB18CAHM3_B/H is required. The P6SMB18CA-M3/52 shares identical electrical specs with that variant but lacks automotive qualification documentation.
How does the bidirectional design of P6SMB18CA-M3/52 affect its PCB layout?
The P6SMB18CA-M3/52 has no polarity marking and functions identically in both directions - simplifying layout by eliminating orientation checks during assembly. It can be placed across differential pairs (e.g., RS-485, CAN) or ungrounded rails without regard to anode/cathode alignment. PCB footprints must follow Vishay's recommended SMB pad dimensions (0.086" × 0.060" minimum, 0.085" × 0.060" max) to ensure thermal performance and solder joint reliability for the P6SMB18CA-M3/52.
What is the maximum junction temperature rating for P6SMB18CA-M3/52?
The P6SMB18CA-M3/52 is rated for a maximum junction temperature (TJ) of +150 °C, enabling operation in high-ambient environments such as industrial motor drives or under-hood automotive locations. Derating curves in the Vishay datasheet (Fig. 2) show that peak pulse power drops linearly above 25 °C ambient - at 100 °C ambient, PPPM is reduced to ~420 W. Thermal design must account for RθJA = 100 °C/W (on 0.2" × 0.2" pads) to maintain safe TJ margins for the P6SMB18CA-M3/52.
Does P6SMB18CA-M3/52 meet any international surge immunity standards?
The P6SMB18CA-M3/52 itself is not certified to IEC 61000-4-2, -4-4, or -4-5, but its 600 W peak pulse power and 25.2 V clamping voltage enable compliant system-level designs. When mounted per Vishay's recommended layout (0.2" × 0.2" copper pads), it helps achieve IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) and IEC 61000-4-2 ±15 kV air discharge when combined with appropriate filtering. System validation is required - the P6SMB18CA-M3/52 provides the foundational clamping capability needed to pass these standards.
P6SMB18CA-M3/52 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- 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)
P6SMB18CA-M3/52 FAQ
1.How can I place an order for P6SMB18CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CA-M3/52 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 P6SMB18CA-M3/52 reliable?
The price and inventory of P6SMB18CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18CA-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB18CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CA-M3/52?
P6SMB18CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CA-M3/52 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 P6SMB18CA-M3/52?
For technical support, including P6SMB18CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CA-M3/52 requirements.
6.How does Aetrix verify that P6SMB18CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB18CA-M3/52 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 P6SMB18CA-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB18CA-M3/52?
All P6SMB18CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CA-M3/52, 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 P6SMB18CA-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB18CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CA-M3/52 Tags
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