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Vishay General Semiconductor - Diodes Division P6SMB18CA-E3/5B
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- Part No.:
- P6SMB18CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CA-E3/5B.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,573
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Product details
Overview
P6SMB18CA-E3/5B 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 stand-off voltage (VWM), 18.9 V maximum 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P6SMB18CA-E3/5B datasheet, P6SMB18CA-E3/5B pinout, P6SMB18CA-E3/5B application, or P6SMB18CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, 25.2 V clamping under 23.8 A surge, RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P6SMB18CA-E3/5B operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to ESD and inductive switching events.
Rated for 600 W peak pulse power (10/1000 µs), it delivers 25.2 V clamping at 23.8 A while maintaining 15.3 V reverse stand-off - allowing reliable operation below system operating voltage. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting continuous dissipation up to 5.0 W at 50 °C ambient on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before conduction begins; sets safe operating margin below system rail. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Guaranteed avalanche onset range; defines minimum clamping threshold under transient stress. |
| VC (Clamping) | 25.2 V at 23.8 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM | 600 W - Peak transient energy absorption capacity; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 23.8 A - Maximum non-repetitive surge current supported at rated clamping voltage; verified per Fig. 3 waveform. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; optimized for high-density PCB layouts and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. 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 single-device protection of AC or floating DC lines. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges and inductive kickback in industrial control systems. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream ICs while maintaining margin above VWM. |
| MSL Level 1 (260 °C peak reflow) | Enables standard lead-free reflow assembly without pre-baking or special handling. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage performance across temperature and lifetime. |
| AEC-Q101 qualified option (_B suffix) | Validated for automotive applications including body electronics and ADAS sensor interfaces. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface or IC pin to shunt transients before reaching sensitive analog front-ends. Use Value: Maintains 15.3 V stand-off while clamping to 25.2 V - preserving signal integrity and preventing latch-up in 12 V automotive systems. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC I/O lines, mounted adjacent to terminal blocks or optocoupler inputs. Use Value: Withstands 23.8 A surge current and 600 W peak power - meeting IEC 61000-4-4/5 immunity requirements for industrial environments. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
Use Scenario: Clamping induced transients on secondary-side DC outputs of AC/DC adapters and USB PD chargers. IC Role / Device Role / Timing Role: Secondary-side TVS placed between VOUT and GND to suppress ringing and coupling from primary-side switching noise. Use Value: Low 25.2 V clamping voltage prevents overvoltage damage to downstream USB controllers and PMICs operating at 5–20 V. |
Use Scenario: Protecting Ethernet PHYs, DSL line drivers, and analog telephone interface circuits from lightning and AC power cross-talk. IC Role / Device Role / Timing Role: Bidirectional suppressor on differential pairs or tip/ring lines, leveraging symmetrical clamping to handle polarity-agnostic surges. Use Value: 15.3 V VWM allows safe operation on 12–15 V bias rails while clamping sub-30 V - compatible with IEEE 802.3af/at PoE voltage margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM (15.3 V) and VC (25.2 V), but lower PPPM = 400 W and smaller SMA package (DO-214AC). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or high-current inductive loads. | Select when board space is constrained and surge energy is ≤400 W - not a drop-in replacement for 600 W requirement. |
| SMCJ18CA | Same VWM/VC, but higher PPPM = 1500 W and larger SMC package (DO-214AB); RθJA = 25 °C/W vs. 100 °C/W. | Supports sustained surge duty cycles and higher ambient temperatures; requires larger PCB pad area. | Choose for mission-critical industrial or automotive applications demanding >600 W headroom and thermal margin. |
Compared with SMAJ18CA and SMCJ18CA, the P6SMB18CA-E3/5B delivers optimal balance of 600 W surge capability, SMB footprint density, and MSL Level 1 process compatibility - making it ideal for cost-sensitive, high-volume SMT designs requiring certified transient immunity without oversized packaging.
Availability
P6SMB18CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter protection requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for P6SMB18CA-E3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P6SMB Series targets high-energy transient suppression in space-constrained SMT designs, with focus on automotive, industrial, and telecom systems where bidirectional clamping, AEC-Q101 qualification, and consistent 600 W pulse rating are critical.
FAQ
What does the "CA" suffix indicate in P6SMB18CA-E3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning the P6SMB18CA-E3/5B provides symmetrical transient suppression in both polarities, with no cathode/anode marking required. This distinguishes it from unidirectional variants (e.g., P6SMB18A) and makes it suitable for AC-coupled or floating DC signal lines where polarity reversal may occur during transients.
Is P6SMB18CA-E3/5B RoHS-compliant and halogen-free?
Yes, the P6SMB18CA-E3/5B carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU. It is not halogen-free; for halogen-free compliance, the "M3" variant (e.g., P6SMB18CA-M3/5B) must be selected. Both E3 and M3 meet JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements.
What is the maximum clamping voltage of P6SMB18CA-E3/5B under surge conditions?
The P6SMB18CA-E3/5B has a maximum clamping voltage (VC) of 25.2 V at 23.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number 88370, Rev. 09-Jan-2024) and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Can P6SMB18CA-E3/5B be used in automotive applications?
Yes - the base P6SMB18CA-E3/5B is commercial-grade, but the AEC-Q101-qualified version (P6SMB18CAHE3_B) is available with the "HE3_B" suffix. That variant undergoes stress testing per AEC-Q101 standards and is approved for use in automotive body electronics, infotainment, and ADAS sensor interfaces where reliability under temperature cycling and vibration is mandatory.
What PCB pad layout is recommended for P6SMB18CA-E3/5B to achieve rated power dissipation?
To achieve the rated 600 W peak pulse power and 5.0 W steady-state dissipation, Vishay specifies mounting P6SMB18CA-E3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. The datasheet (Fig. 6, p.4) confirms this layout enables proper thermal conduction and surge current handling - deviating from this reduces both clamping performance and reliability under repetitive transients.
P6SMB18CA-E3/5B 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:
- 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-E3/5B FAQ
1.How can I place an order for P6SMB18CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CA-E3/5B 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-E3/5B reliable?
The price and inventory of P6SMB18CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB18CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CA-E3/5B?
P6SMB18CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CA-E3/5B 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-E3/5B?
For technical support, including P6SMB18CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB18CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB18CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB18CA-E3/5B?
All P6SMB18CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB18CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CA-E3/5B Tags
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