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Vishay General Semiconductor - Diodes Division P6SMB18A-E3/52
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- Part No.:
- P6SMB18A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18A-E3/52.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
P6SMB18A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 18 V breakdown voltage (VBR = 17.1–18.9 V at 1 mA), 15.3 V stand-off voltage (VWM), and clamps to 25.2 V at 23.8 A peak pulse current under 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P6SMB18A-E3/52 datasheet, P6SMB18A-E3/52 pinout, P6SMB18A-E3/52 application, or P6SMB18A-E3/52 equivalent, key selection criteria include unidirectional polarity, 600 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.33), thermal resistance of 100 °C/W, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable leakage performance (<1 µA at VWM) and fast response time (<1 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 600 W peak pulse power (10/1000 µs), with derating above 25 °C per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. Its SMB package meets UL 94 V-0 flammability and J-STD-020 MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 15.3 V - maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 17.1–18.9 V at 1 mA - precise avalanche onset range defining clamping threshold |
| Clamping Voltage (VC) | 25.2 V at 23.8 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case transient |
| Peak Pulse Power (PPPM) | 600 W - surge energy handling capacity under standardized 10/1000 µs waveform |
| Junction Temperature Range | –65 °C to +150 °C - operational limit for reliability in harsh environments including under-hood automotive |
| Thermal Resistance (RθJA) | 100 °C/W - defines temperature rise per watt dissipated without heatsinking; requires PCB copper pad area ≥ 5 mm × 5 mm |
| Leakage Current (ID) | <1 µA at 15.3 V - minimal loading on sensitive signal or bias lines during normal operation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts only during forward surge events |
| Cathode | Avalanche clamping terminal (unidirectional) | Connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream components during transient events |
| Glass passivated junction | Ensures stable leakage and long-term reliability across temperature and humidity cycling |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture-related popcorning or delamination |
| AEC-Q101 qualification option | Available with HE3 suffix for automotive-grade production use in engine control and ADAS subsystems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges up to ±100 V. Use Value: Limits voltage excursion to ≤25.2 V, preventing damage to LDOs, microcontrollers, and CAN transceivers downstream. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in pressure or temperature sensors exposed to field wiring noise. IC Role / Device Role / Timing Role: Placed across signal and ground to absorb ESD and inductive kickback from nearby solenoid actuation. Use Value: Sub-1 ns response prevents latch-up in precision op-amps and ADC front-ends while maintaining signal integrity below 1 µA leakage. |
| Consumer USB Port ESD Protection | Telecom DC Power Input Protection |
Use Scenario: Secondary-level ESD protection on VBUS line of USB Type-A ports in docking stations and monitors. IC Role / Device Role / Timing Role: Positioned after primary polymer fuse and upstream of USB power switch IC. Use Value: Clamps 8 kV contact discharge (IEC 61000-4-2) to <25.2 V, preserving USB PD negotiation integrity and preventing gate oxide damage. |
Use Scenario: Surge suppression on –48 V DC telecom power inputs subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Used in back-to-back configuration with another P6SMB18A-E3/52 to handle bidirectional surges on isolated DC feeds. Use Value: Delivers 600 W per device with matched VBR tolerance (±5 %), ensuring balanced clamping and avoiding single-device overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5T | Same SMB package, identical VWM/VBR/VC, but rated for 400 W PPPM (vs. 600 W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not suitable for IEC 61000-4-5 surge testing | Select when cost sensitivity outweighs surge margin requirements and layout space is constrained |
| 1.5SMC18A | Higher-power SMC (DO-214AB) package, same electrical specs, 1500 W PPPM, larger footprint (7.11 × 6.22 mm vs. 4.57 × 3.94 mm) | Used where board-level surge immunity must exceed Level 4; incompatible with SMB land pattern | Choose when system-level surge test compliance mandates >600 W capability and PCB real estate permits larger package |
Compared with SMAJ18A-E3/5T and 1.5SMC18A, P6SMB18A-E3/52 delivers optimal balance of 600 W surge rating, SMB footprint compatibility, and commercial/AEC-Q101 scalability - making it preferred for space-constrained industrial and automotive modules requiring validated transient resilience without layout redesign.
Availability
P6SMB18A-E3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power delivery systems, and telecom DC input stages requiring stable component supply with RoHS-compliant, commercial-grade traceability.
Supply support for P6SMB18A-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, ruggedness, and application-specific validation.
The P6SMB Series was developed to deliver high-power, low-profile TVS protection for automotive, industrial, and telecom applications where space, surge margin, and thermal stability are critical design constraints.
FAQ
What is the maximum clamping voltage of the P6SMB18A-E3/52 under standard test conditions?
The P6SMB18A-E3/52 clamps to a maximum of 25.2 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 23.8 A. This value is measured per JEDEC standards and reflects worst-case voltage seen by protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the P6SMB18A-E3/52 suitable for automotive applications?
Yes - the base P6SMB18A-E3/52 is RoHS-compliant and commercial-grade, but Vishay offers AEC-Q101 qualified versions under ordering codes like P6SMB18AHE3_B/H. These variants undergo stress testing per automotive reliability standards and are approved for use in engine control, body electronics, and ADAS subsystems where qualification is mandatory.
How does the P6SMB18A-E3/52 differ from bidirectional TVS diodes like P6SMB18CA?
The P6SMB18A-E3/52 is unidirectional and functions only in reverse breakdown, with polarity-sensitive mounting (cathode band toward higher potential). In contrast, P6SMB18CA is bidirectional and symmetrical - it clamps equally in both directions, eliminating polarity concerns but exhibiting slightly higher leakage at low voltages. Use P6SMB18A-E3/52 for DC power line protection and P6SMB18CA for AC or differential signal lines.
What is the thermal resistance and recommended PCB layout for optimal P6SMB18A-E3/52 performance?
The P6SMB18A-E3/52 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. To maintain safe junction temperatures during repetitive surges, ensure minimum pad dimensions match Vishay's recommended layout and avoid excessive trace length or narrow traces that increase thermal impedance.
Can the P6SMB18A-E3/52 be used in parallel to increase surge current handling?
No - P6SMB18A-E3/52 devices should not be paralleled due to VBR tolerance (±5 %) causing current imbalance and potential thermal runaway. For higher surge capability, select a single higher-rated device such as 1.5SMC18A (1500 W) or use coordinated external current-sharing resistors - though the latter adds complexity and reduces clamping speed.
P6SMB18A-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:
- 1
- Bidirectional Channels:
- -
- 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)
P6SMB18A-E3/52 FAQ
1.How can I place an order for P6SMB18A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18A-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 P6SMB18A-E3/52 reliable?
The price and inventory of P6SMB18A-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 P6SMB18A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB18A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18A-E3/52?
P6SMB18A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18A-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 P6SMB18A-E3/52?
For technical support, including P6SMB18A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18A-E3/52 requirements.
6.How does Aetrix verify that P6SMB18A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB18A-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 P6SMB18A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB18A-E3/52?
All P6SMB18A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18A-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 P6SMB18A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB18A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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