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Vishay General Semiconductor - Diodes Division P6SMB18A-E3/5B
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- Part No.:
- P6SMB18A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18A-E3/5B.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,701
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Product details
Overview
P6SMB18A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping transient overvoltages on power and signal lines. It features a 15.3 V stand-off voltage (VWM), 18.9 V maximum breakdown voltage (VBR), 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 P6SMB18A-E3/5B datasheet, P6SMB18A-E3/5B pinout, P6SMB18A-E3/5B application, or P6SMB18A-E3/5B equivalent, this page delivers verified electrical parameters, thermal behavior under surge conditions, RoHS-compliant packaging details, AEC-Q101 qualification status, and real-world protection use cases - all critical for ESD and lightning-induced transient design validation.
Technical Context
The P6SMB18A-E3/5B operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transients while maintaining low incremental surge resistance. Its clamping action begins at 15.3 V and limits voltage to ≤25.2 V during a 10/1000 μs 23.8 A surge, delivering predictable protection without latch-up or degradation under repetitive duty cycles (0.01 %).
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to +150 °C junction temperature. The cathode-band-marked SMB package meets UL 94 V-0 flammability and J-STD-020 MSL Level 1, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
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 min/max) | 17.1 V to 18.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering across process variation |
| VC @ IPPM | 25.2 V at 23.8 A - Clamped voltage during full 600 W transient; determines protected circuit's maximum stress level |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surge events |
| IPPM | 23.8 A - Peak pulse current corresponding to VC; sets minimum PCB trace width and layout clearance requirements |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.205" × 0.220" footprint; compatible with automated pick-and-place and reflow |
Pinout & Package
SMB (DO-214AA) package with molded plastic body, matte tin-plated leads, and cathode band marking on the anode side. Dimensions: 3.94 mm × 2.20 mm × 1.52 mm (L × W × H); recommended pad layout: 5.0 mm × 5.0 mm copper per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side reference | Defines polarity-sensitive placement - must be tied to lower potential side of protected node |
| Cathode | Current exit point in forward bias; marked by band; connected to supply rail or signal source | Ensures correct orientation for unidirectional clamping; reversal causes open-circuit failure mode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 Level 3 (1 kV line-to-ground) surge immunity requirements |
| Clamping voltage ≤25.2 V at 23.8 A | Enables safe operation of 24 V nominal systems with ±10 % tolerance and 3.3 V/5 V logic interfaces downstream |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving protection fidelity |
| AEC-Q101 qualified (suffix _B) | Confirms reliability for automotive applications including engine control units, body electronics, and ADAS sensors |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-related popcorn failure risk |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in vehicle ECUs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤25.2 V during 10/1000 μs surges up to 23.8 A, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point on 4–20 mA or 0–10 V signal lines. Use Value: Clamps induced lightning surges before they reach precision op-amps or ADC front-ends, preserving measurement integrity. |
| Consumer Power Adapter Input Stage | Telecom Equipment DC Bias Lines |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters supplying USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/+12 V output rails to absorb flyback spikes from transformer leakage inductance. Use Value: Prevents latch-up or burnout of USB port controllers and Ethernet PHYs during abnormal startup or short-circuit recovery. |
Use Scenario: Protecting bias lines feeding RF amplifiers and optical transceivers in base station power distribution boards. IC Role / Device Role / Timing Role: TVS placed in series with DC feed to active components to block common-mode surges entering via antenna or fiber interface grounds. Use Value: Maintains signal integrity by limiting transient coupling into sensitive RF stages, avoiding desense or false alarms. |
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 | Same SMB package, identical VWM/VC specs, 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 line surges | Select SMAJ18A only when system-level surge testing does not exceed 400 W pulse energy and cost optimization is prioritized. |
| SMCJ18A | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (65.1 A) | Requires larger PCB area and different thermal management; suited for primary-side AC/DC or high-power motor drives | Choose SMCJ18A where higher surge margin is required and board space allows SMC footprint; not drop-in compatible with SMB layout. |
Compared with SMAJ18A and SMCJ18A, the P6SMB18A-E3/5B delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and AEC-Q101 qualification - making it the preferred choice for space-constrained automotive and industrial 24 V systems requiring validated reliability.
Availability
P6SMB18A-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC bias line safeguarding requiring stable component supply and long-term lifecycle continuity.
Supply support for P6SMB18A-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, thermal performance, and automotive-grade qualification.
The P6SMB Series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and consumer electronics - balancing surge robustness, mounting flexibility, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of the P6SMB18A-E3/5B under a 10/1000 μs surge?
The P6SMB18A-E3/5B clamps to a maximum of 25.2 V when subjected to its rated 23.8 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads), and represents the upper limit of voltage seen by downstream circuitry during transient events - critical for ensuring compatibility with 24 V system tolerances and logic-level ICs.
Is the P6SMB18A-E3/5B AEC-Q101 qualified?
Yes, the P6SMB18A-E3/5B carries the "_B" suffix variant (e.g., P6SMB18AHE3_B) which is explicitly AEC-Q101 qualified per Vishay documentation. While the base P6SMB18A-E3/5B is commercial-grade, the _B revision adds automotive reliability validation including temperature cycling, humidity testing, and surge endurance - essential for under-hood and chassis-mounted applications.
What does the "-E3/5B" suffix indicate in P6SMB18A-E3/5B?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/5B" specifies packaging in a 13-inch diameter plastic tape and reel containing 3200 units. This format supports high-volume SMT assembly and is distinct from the /52 variant (7-inch reel, 750 units), enabling optimized logistics for production-scale deployment of the P6SMB18A-E3/5B.
Can the P6SMB18A-E3/5B be used in bidirectional configurations?
No - the P6SMB18A-E3/5B is strictly unidirectional, as confirmed by its part number suffix "A" (not "CA") and cathode-band marking. Bidirectional operation requires the CA variant (e.g., P6SMB18CA), which lacks polarity marking and supports symmetrical clamping in both directions. Using P6SMB18A-E3/5B in bidirectional circuits risks open-circuit failure during reverse transients.
What is the maximum operating junction temperature for the P6SMB18A-E3/5B?
The P6SMB18A-E3/5B has a maximum junction temperature (TJ) of +150 °C, as specified in Vishay's datasheet. This rating allows reliable operation in high-ambient environments such as engine compartments, industrial enclosures, and enclosed power supplies - provided PCB thermal design maintains junction-to-ambient resistance within the 100 °C/W limit under worst-case power dissipation.
P6SMB18A-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:
- 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-E3/5B FAQ
1.How can I place an order for P6SMB18A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18A-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 P6SMB18A-E3/5B reliable?
The price and inventory of P6SMB18A-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 P6SMB18A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB18A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18A-E3/5B?
P6SMB18A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18A-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 P6SMB18A-E3/5B?
For technical support, including P6SMB18A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18A-E3/5B requirements.
6.How does Aetrix verify that P6SMB18A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB18A-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 P6SMB18A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB18A-E3/5B?
All P6SMB18A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18A-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 P6SMB18A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB18A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18A-E3/5B Tags
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