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Vishay General Semiconductor - Diodes Division P6SMB18AHE3_B/H
- Part No.:
- P6SMB18AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHE3_B/H.pdf
- Description:
- 600W,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
P6SMB18AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal 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 rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P6SMB18AHE3_B/H datasheet, P6SMB18AHE3_B/H pinout, P6SMB18AHE3_B/H application, or P6SMB18AHE3_B/H equivalent, this AEC-Q101 qualified TVS offers validated surge immunity for 12 V rail protection, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
The P6SMB18AHE3_B/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of ESD and inductive switching spikes.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, with maximum junction temperature rated at +150 °C. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak, confirming suitability for high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system nominal 12 V rail. |
| VBR (Breakdown Voltage) | 17.1–18.9 V at IT = 1 mA - Tight 5% tolerance ensures predictable turn-on during transient events. |
| VC (Clamping Voltage) | 25.2 V at IPPM = 23.8 A - Limits downstream voltage stress during 600 W surge, protecting 30 V-rated MOSFETs. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 μs waveform - Validates robustness against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Supports single-event inductive kick protection without bond wire failure. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 Qualified | Yes - Confirmed reliability for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
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; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward-biased surge conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply); initiates avalanche conduction when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Validated clamping capability for severe transients per ISO 7637-2 and IEC 61000-4-5 standards. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current across temperature and life cycles. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture-induced delamination or parametric shift. |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
Applications
| Automotive 12 V Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Suppresses load-dump and alternator ripple transients on vehicle battery-fed circuits. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V rail and chassis ground to clamp surges above 15.3 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤25.2 V during 600 W pulses. |
Use Scenario: Protects analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair (e.g., 4–20 mA loop) to shunt transients. Use Value: Fast <1 ns response prevents latch-up in op-amps and ADC front-ends during ±8 kV contact ESD. |
| Consumer Power Adapter Input Stage | Telecom PoE Interface Surge Guard |
Use Scenario: Shields AC-DC adapter primary-side rectifier and controller ICs from lightning-induced surges. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output to clamp overvoltage before bulk capacitor. Use Value: Withstands repetitive 10/1000 μs surges up to 600 W at 0.01% duty cycle without degradation. |
Use Scenario: Safeguards Ethernet PHY and PoE PD controller from induced surges on data lines per IEEE 802.3af/at. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each twisted pair, cathode tied to VDD, anode to GND. Use Value: 25.2 V clamping ensures PoE interface ICs (e.g., TPS2375) remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5B | Same VWM/VBR/VC, but SMA package (DO-214AC); 400 W PPPM, higher RθJA (140 °C/W). | Limited to lower-energy transients; less suitable for automotive load-dump where 600 W is required. | Select P6SMB18AHE3_B/H when 600 W clamping and AEC-Q101 qualification are mandatory. |
| 1.5SMC18A | Same electrical specs, but SMC (DO-214AB) package; larger footprint, higher thermal mass, RθJA = 70 °C/W. | Better thermal handling but incompatible with dense layouts requiring SMB footprint. | Choose P6SMB18AHE3_B/H for space-constrained automotive modules needing SMB-compatible layout. |
Compared with SMAJ18A-E3/5B and 1.5SMC18A, the P6SMB18AHE3_B/H uniquely combines 600 W surge rating, AEC-Q101 qualification, and SMB footprint - making it the only option meeting ISO 16750-2 load-dump immunity in compact automotive ECUs.
Availability
P6SMB18AHE3_B/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and telecom PoE protection requiring stable component supply, AEC-Q101 compliance, and consistent SMB packaging.
Supply support for P6SMB18AHE3_B/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The P6SMB Series targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 qualification, low-profile SMT compatibility, and repeatable clamping performance across temperature and life.
FAQ
What is the clamping voltage of the P6SMB18AHE3_B/H at its rated peak pulse current?
The P6SMB18AHE3_B/H 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 measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The P6SMB18AHE3_B/H maintains this clamping performance across its full operating temperature range and after repeated surge exposure, as verified in AEC-Q101 stress testing.
Is the P6SMB18AHE3_B/H suitable for automotive applications?
Yes, the P6SMB18AHE3_B/H is explicitly AEC-Q101 qualified, with suffix "HE3_B" indicating RoHS-compliant and automotive-grade construction. It passes high-temperature operating life (HTOL), temperature cycling (TCT), and ESD tests required for under-hood and body-control module use. The P6SMB18AHE3_B/H is routinely deployed in 12 V power rail protection for automotive ECUs, infotainment systems, and ADAS camera modules.
What does the "_B/H" suffix mean in P6SMB18AHE3_B/H?
The "_B" denotes AEC-Q101 qualification for the P6SMB18AHE3_B/H series (applicable to devices from P6SMB6.8A to P6SMB220A), while "/H" specifies 7-inch plastic tape-and-reel packaging with 750 units per reel. This ordering code confirms both automotive reliability grade and standard SMT-compatible delivery format - distinct from commercial-grade "E3" or halogen-free "HM3" variants.
How does the P6SMB18AHE3_B/H compare to bidirectional TVS diodes like P6SMB18CA?
The P6SMB18AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., 12 V supply to ground), offering lower leakage and tighter VBR tolerance than bidirectional equivalents. In contrast, P6SMB18CA provides symmetrical clamping for AC or floating lines but exhibits higher reverse leakage and wider VBR spread. Use the P6SMB18AHE3_B/H when protecting polarized rails with strict leakage budgets.
What is the thermal resistance of the P6SMB18AHE3_B/H, and how does it affect PCB layout?
The P6SMB18AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe junction temperatures under sustained power dissipation, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet. Reducing pad size increases RθJA, risking thermal runaway during repetitive surges - a key design constraint for the P6SMB18AHE3_B/H in high-duty-cycle applications.
P6SMB18AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB18AHE3_B/H FAQ
1.How can I place an order for P6SMB18AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHE3_B/H 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 P6SMB18AHE3_B/H reliable?
The price and inventory of P6SMB18AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18AHE3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB18AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHE3_B/H?
P6SMB18AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHE3_B/H 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 P6SMB18AHE3_B/H?
For technical support, including P6SMB18AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHE3_B/H requirements.
6.How does Aetrix verify that P6SMB18AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHE3_B/H 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 P6SMB18AHE3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB18AHE3_B/H?
All P6SMB18AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHE3_B/H, 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 P6SMB18AHE3_B/H part is unused and in its original packaging.
Return procedure for P6SMB18AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHE3_B/H Tags
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