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Vishay General Semiconductor - Diodes Division P6SMB18CA-E3/52
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- Part No.:
- P6SMB18CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CA-E3/52.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,572
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Product details
Overview
P6SMB18CA-E3/52 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 or power lines. It features a 15.3 V stand-off voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA, and clamps to ≤25.2 V at 23.8 A peak pulse current (IPPM) under 10/1000 μs waveform - used in automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the P6SMB18CA-E3/52 datasheet, P6SMB18CA-E3/52 pinout, P6SMB18CA-E3/52 application, or P6SMB18CA-E3/52 equivalent, this device delivers 600 W peak pulse power, bidirectional clamping symmetry, low incremental surge resistance, and AEC-Q101 qualification readiness - critical for robust ESD and lightning-induced transient protection in space-constrained PCB layouts.
Technical Context
The P6SMB18CA-E3/52 operates as a bidirectional avalanche diode with symmetrical reverse/forward clamping behavior, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with derating applied above TA = 25 °C per Figure 2. The device sustains repetitive 10/1000 μs pulses at 0.01% duty cycle and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping) | ≤25.2 V at 23.8 A (10/1000 μs) - Peak voltage seen by protected circuit; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak transient energy absorption capability; enables handling of high-energy surges like IEC 61000-4-5 Level 3. |
| IPPM | 23.8 A - Maximum non-repetitive surge current; sets minimum trace width and PCB copper pad design (0.2" × 0.2") for thermal safety. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.2 mm height and 3.94 mm length; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional construction has no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals conduct identically in either direction during overvoltage events; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485), and ungrounded interfaces without polarity constraints. |
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity testing up to 1 kV open-circuit / 0.5 A short-circuit levels. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in MOSFETs/sensors. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows standard lead-free assembly without baking or special handling. |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and lifetime cycling. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping transients within nanoseconds. Use Value: Maintains signal integrity during 12 V/24 V system surges while meeting AEC-Q101 qualification prerequisites. |
Use Scenario: Shielding digital input modules from induced surges on factory floor wiring exposed to motor switching noise. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input channels before optocoupler or MCU GPIO. Use Value: Limits clamped voltage to ≤25.2 V, ensuring compatibility with 3.3 V/5 V logic-level protection stages downstream. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
|
Use Scenario: Safeguarding Ethernet PHY magnetics or ADSL line drivers against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode TVS across differential pair (e.g., TX+/TX−), conducting symmetrically during fast-rising transients. Use Value: Delivers sub-1 ns response time and 600 W surge capacity without degrading signal bandwidth up to 100 MHz. |
Use Scenario: Secondary-level protection on USB 2.0 data lines (D+/D−) after primary ESD array, absorbing residual energy from contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ < 100 pF at 0 V) minimizing signal distortion. Use Value: Clamps ±15 kV HBM ESD events to <25 V while maintaining USB full-speed eye diagram compliance. |
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/VBR/VC specs but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge. | Select when board space is constrained and surge threat level is limited to ESD or low-dose switching noise. |
| SMCJ18CA | Higher PPPM (1500 W); same VWM/VBR, larger SMC (DO-214AB) package; RθJA = 35 °C/W. | Supports harsher surge environments (e.g., outdoor telecom, railway systems); requires larger PCB area. | Choose when system-level surge testing exceeds 1 kV or sustained pulse repetition is expected. |
Compared with SMAJ18CA and SMCJ18CA, the P6SMB18CA-E3/52 offers optimal balance of 600 W surge capacity, SMB footprint compatibility, and thermal performance - making it ideal for cost-sensitive, space-limited automotive and industrial designs requiring certified transient resilience.
Availability
P6SMB18CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial programmable logic controllers (PLCs), telecom line cards, and consumer USB interface protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for P6SMB18CA-E3/52 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The P6SMB Series targets board-level transient suppression in automotive, industrial, and telecom applications where compact size, bidirectional symmetry, and repeatable clamping performance are essential design requirements.
FAQ
What does the "CA" suffix indicate in P6SMB18CA-E3/52?
The "CA" suffix denotes a bidirectional configuration: the P6SMB18CA-E3/52 provides symmetrical clamping in both forward and reverse directions, making it suitable for AC-coupled or differential signal lines where polarity cannot be assumed. This differs from unidirectional variants (e.g., P6SMB18A) that require correct cathode orientation.
Is P6SMB18CA-E3/52 AEC-Q101 qualified?
The base P6SMB18CA-E3/52 is RoHS-compliant and commercial-grade; however, AEC-Q101 qualification is available under the HE3 or HM3 automotive ordering codes (e.g., P6SMB18CAHE3_B). The -E3/52 variant itself is not AEC-Q101 certified but shares identical die and construction - qualification status depends strictly on the full ordering code suffix.
What is the maximum clamping voltage of P6SMB18CA-E3/52 under surge conditions?
The P6SMB18CA-E3/52 clamps to a maximum of 25.2 V when subjected to its rated peak pulse current of 23.8 A under the standardized 10/1000 μs waveform. This value is guaranteed across temperature and production lot variations, and defines the upper voltage limit imposed on protected circuitry during transient events.
Can P6SMB18CA-E3/52 be used in place of a unidirectional TVS like P6SMB18A?
No - the P6SMB18CA-E3/52 is bidirectional and lacks polarity marking, whereas P6SMB18A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating references, while unidirectional parts are required for DC-biased lines where reverse conduction must be blocked.
What PCB pad layout is recommended for P6SMB18CA-E3/52 to achieve rated thermal performance?
To achieve the specified 600 W peak pulse power and thermal derating, Vishay specifies mounting the P6SMB18CA-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Smaller pads reduce heat dissipation and may cause premature failure under repeated surge stress; the recommended layout is documented in Figure 4 of datasheet 88370.
P6SMB18CA-E3/52 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-E3/52 FAQ
1.How can I place an order for P6SMB18CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CA-E3/52 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-E3/52 reliable?
The price and inventory of P6SMB18CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18CA-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB18CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CA-E3/52?
P6SMB18CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CA-E3/52 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-E3/52?
For technical support, including P6SMB18CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CA-E3/52 requirements.
6.How does Aetrix verify that P6SMB18CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB18CA-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB18CA-E3/52?
All P6SMB18CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CA-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB18CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CA-E3/52 Tags
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