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Vishay General Semiconductor - Diodes Division P6SMB18CA-M3/5B
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- Part No.:
- P6SMB18CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CA-M3/5B.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
P6SMB18CA-M3/5B 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 15.3 V standoff voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA, 25.2 V maximum clamping voltage (VC) at 23.8 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and ICs in industrial and automotive electronics.
For engineers reviewing the P6SMB18CA-M3/5B datasheet, P6SMB18CA-M3/5B pinout, P6SMB18CA-M3/5B application, or P6SMB18CA-M3/5B equivalent, key selection criteria include bidirectional clamping behavior, 25.2 V clamping voltage under 23.8 A surge, SMB package thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility (via HM3 suffix), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This device operates as a voltage-clamping protection element in both forward and reverse directions, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its bidirectional symmetry eliminates polarity concerns during board layout and enables use on AC-coupled or differential signal paths without external rectification.
The P6SMB18CA-M3/5B sustains 600 W peak pulse power under standardized 10/1000 µs waveform conditions at 0.01% duty cycle, with thermal performance defined by RθJA = 100 °C/W and RθJL = 20 °C/W. It is rated for junction temperatures from –65 °C to +150 °C and meets J-STD-020 MSL Level 1 reflow requirements (peak 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Avalanche onset range; ensures reliable triggering within specified tolerance band. |
| VC (Clamping) | 25.2 V at 23.8 A - Peak voltage seen by protected circuit during 10/1000 µs transient; determines minimum safe IC withstand rating. |
| PPPM | 600 W - Surge energy handling capacity; supports repetitive transients up to 0.01% duty cycle without degradation. |
| IPPM | 23.8 A - Peak surge current the device safely conducts while maintaining VC ≤ 25.2 V. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal derating limit for sustained power dissipation. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; optimized for automated placement and PCB space efficiency. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as input/output for transient suppression in AC or differential applications. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without derating in standard PCB layouts. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving clamping precision for high-speed interfaces. |
| MSL Level 1 moisture sensitivity | Allows direct placement into reflow ovens without baking; supports high-yield SMT manufacturing with peak 260 °C profile. |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for automotive and industrial end equipment without compromising surge performance. |
| AEC-Q101 qualification option | Available with HM3 suffix (e.g., P6SMB18CA-HM3_B); validated for automotive-grade reliability including HTOL, TC, and UHAST testing. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt transients before reaching signal conditioning amplifiers or microcontroller ADC inputs. Use Value: Maintains signal integrity under 1 kV/µs fast transients while limiting clamped voltage to 25.2 V - well below typical 3.3 V or 5 V rail overvoltage thresholds of downstream ICs. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, coordinated with series current-limiting resistors and optocoupler isolation barriers. Use Value: Absorbs 600 W surge energy without failure, enabling >100,000 surge cycles per IEC 61000-4-4 compliance - critical for factory automation uptime. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Secondary-level protection on Ethernet PHY or xDSL line drivers exposed to lightning-induced surges in telecom central office equipment. IC Role / Device Role / Timing Role: Fast-response clamping device positioned after gas discharge tube (GDT) primary protection to handle residual fast-rising transients. Use Value: Sub-1 ns response time limits let-through voltage to <25.2 V, preventing latch-up or gate oxide damage in 10/100/1000BASE-T transceivers. |
Use Scenario: Suppressing commutation spikes generated by brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber-style TVS across motor terminals or H-bridge MOSFET drains to clamp inductive kickback during PWM switching. Use Value: Withstands repeated 23.8 A surges at 25.2 V clamping, extending MOSFET lifetime and eliminating need for bulky RC snubbers in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Same SMB package, identical VWM/VBR/VC specs, but rated for 600 W with tighter VBR tolerance (±5% vs ±6.5% for P6SMB18CA). | Preferred where tighter breakdown consistency is required across production lots, e.g., safety-critical medical monitoring inputs. | Select SMBJ18CA when statistical process control demands tighter VBR distribution; P6SMB18CA-M3/5B offers broader availability and lower unit cost in high-volume industrial programs. |
| 1.5SMC18CA | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass (RθJA ≈ 60 °C/W), and 1.5 kW peak power rating. | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) where PCB space allows larger footprint. | Choose 1.5SMC18CA only if system-level surge testing exceeds 600 W single-event requirement; otherwise P6SMB18CA-M3/5B provides optimal size/performance balance. |
Compared with SMBJ18CA and 1.5SMC18CA, P6SMB18CA-M3/5B delivers identical clamping performance in the smallest SMB footprint, with halogen-free compliance and scalable tape-and-reel packaging (3200 pcs/13″ reel), making it ideal for space-constrained, high-volume industrial and automotive applications requiring consistent surge immunity.
Availability
P6SMB18CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and consumer appliance motor drives requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for P6SMB18CA-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 diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems where space, thermal performance, and AEC-Q101 readiness are critical design constraints.
FAQ
What is the clamping voltage of the P6SMB18CA-M3/5B under a 10/1000 µs surge?
The P6SMB18CA-M3/5B has a maximum clamping voltage (VC) of 25.2 V at 23.8 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the upper bound voltage imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P6SMB18CA-M3/5B suitable for automotive applications?
Yes, the P6SMB18CA-M3/5B is eligible for automotive use when ordered with the HM3 suffix (e.g., P6SMB18CA-HM3_B), which denotes full AEC-Q101 qualification. The base P6SMB18CA-M3/5B itself is halogen-free and RoHS-compliant, with MSL Level 1 reflow compatibility and –65 °C to +150 °C operating range - all foundational requirements for under-hood and chassis-mounted electronics.
How does the bidirectional configuration of P6SMB18CA-M3/5B affect PCB layout?
The P6SMB18CA-M3/5B has no polarity marking and functions identically in both directions, simplifying PCB layout by eliminating orientation checks during automated placement. This symmetry allows direct integration on AC-coupled lines, differential pairs (e.g., RS-485), or unidirectional rails where reverse-voltage risk exists - reducing design validation effort and assembly error rates.
What is the thermal resistance of the P6SMB18CA-M3/5B, and how does it impact power handling?
The P6SMB18CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values define its ability to dissipate heat during repetitive surges; for example, at 5.0 W steady-state power, junction temperature rises ~500 °C above ambient - confirming that the device is intended for transient, not continuous, power dissipation.
Does the P6SMB18CA-M3/5B require external current-limiting components?
No, the P6SMB18CA-M3/5B operates as a self-limiting clamping device and does not require series resistors or fuses for basic transient suppression. However, in high-energy applications (e.g., 24 V industrial I/O), a series current-limiting resistor is often used upstream to reduce peak IPPM and extend device lifetime - the P6SMB18CA-M3/5B's low incremental surge resistance ensures minimal impact on clamping performance when used with such networks.
P6SMB18CA-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:
- -
- 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-M3/5B FAQ
1.How can I place an order for P6SMB18CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CA-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 P6SMB18CA-M3/5B reliable?
The price and inventory of P6SMB18CA-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 P6SMB18CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB18CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CA-M3/5B?
P6SMB18CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CA-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 P6SMB18CA-M3/5B?
For technical support, including P6SMB18CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB18CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB18CA-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 P6SMB18CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB18CA-M3/5B?
All P6SMB18CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CA-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 P6SMB18CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB18CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CA-M3/5B Tags
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