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Vishay General Semiconductor - Diodes Division P6SMB18AHE3_B/I
- Part No.:
- P6SMB18AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHE3_B/I.pdf
- Description:
- 600W,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,246
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Product details
Overview
P6SMB18AHE3_B/I 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 stand-off 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/I datasheet, P6SMB18AHE3_B/I pinout, P6SMB18AHE3_B/I application, or P6SMB18AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
The P6SMB18AHE3_B/I operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle. Its unidirectional configuration enables forward conduction only during overvoltage events on the cathode-biased side, with polarity marked by a band on the SMB case.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –65 °C to +150 °C. The device meets J-STD-020 MSL Level 1 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive use - confirmed by the "HE3" and "_B" suffixes in the ordering code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transient suppression. |
| VC (Clamping) | 25.2 V at 23.8 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability with standard 10/1000 µs waveform; supports robust ESD and load-dump protection. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with 0.220" × 0.130" footprint; optimized for automated pick-and-place and thermal pad layout. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive applications per stress test requirements; indicated by HE3 and _B suffixes. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, dimensions 0.220" × 0.130" × 0.086" (5.59 mm × 3.30 mm × 2.20 mm). Cathode identified by a single band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse-biased clamping | Connected to line being protected (e.g., VIN rail); forms low-impedance path to ground when VIN exceeds VBR. |
| Cathode | Current exit terminal during clamping; marked with band | Typically tied to system ground or low-impedance return path; establishes reference for unidirectional clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables suppression of high-energy transients such as ISO 7637-2 Load Dump (up to 120 V, 100 ms) and IEC 61000-4-5 surges without failure. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules requiring extended temperature cycling and humidity testing. |
| Glass-passivated junction | Provides stable leakage performance (<1 µA at VWM) and long-term stability under thermal stress and humidity exposure. |
| MSL Level 1 rating | Allows direct placement into standard SMT reflow profiles (peak 260 °C) without pre-baking, reducing manufacturing complexity. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients up to 120 V and ISO 16750-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transients to ≤25.2 V, preventing damage to upstream LDOs and microcontrollers while maintaining AEC-Q101 compliance. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS diode mounted at connector entry point, shunting transients to chassis ground before signal conditioning circuitry. Use Value: Sub-1 ns response and <1 µA leakage at 15.3 V preserve signal integrity and offset accuracy in 16-bit ADC front-ends. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
|
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Unidirectional TVS across bulk capacitor input, triggered only during overvoltage events. Use Value: 600 W rating handles repeated 6 kV/3 kA surges per IEC 61000-4-5; RoHS-compliant HE3 suffix ensures regulatory compliance. |
Use Scenario: Protecting Ethernet PHY and PoE interface circuits from induced surges on RJ45 ports in network switches. IC Role / Device Role / Timing Role: TVS array element placed on each differential pair, referenced to isolated ground plane. Use Value: 25.2 V clamping voltage aligns with 24 V PoE voltage rails, preventing latch-up in magnetics and PHY transceivers. |
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-E3/5B | Same VWM (15.4 V), slightly higher VC (27.7 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA). | Less suitable for high-energy load dump; better for space-constrained consumer PCBs where thermal mass is limited. | Select when board area is critical and surge energy is ≤400 W; verify thermal derating at 100 °C ambient. |
| 1.5SMC18A | Same electrical specs (VWM = 15.3 V, VC = 25.2 V), but SMC (DO-214AB) package - larger footprint (0.285" × 0.185") and higher thermal mass. | Better suited for high-reliability industrial power supplies needing enhanced thermal dissipation and mechanical robustness. | Choose when board layout allows larger package and long-term thermal stability under sustained 5 W dissipation is required. |
Compared with SMAJ18A-E3/5B and 1.5SMC18A, the P6SMB18AHE3_B/I delivers optimal balance of AEC-Q101 qualification, 600 W surge capacity, and SMB footprint - making it preferred for automotive-grade designs where both reliability and SMT compatibility are mandatory.
Availability
P6SMB18AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power interface designs requiring stable component supply, AEC-Q101 traceability, and consistent SMB package logistics.
Supply support for P6SMB18AHE3_B/I 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, efficiency, and automotive-grade qualification.
The P6SMB Series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and repeatable clamping performance.
FAQ
What does the "HE3_B/I" suffix indicate in P6SMB18AHE3_B/I?
The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, while "_B" specifies AEC-Q101 qualification for the 6.8 V to 220 V voltage range. The "/I" indicates packaging in 13-inch tape-and-reel format with 3200 units per reel - confirmed in Vishay's ordering information table for P6SMB18AHE3_B/I. This full suffix ensures traceability to automotive-grade reliability standards and logistics compatibility.
Is P6SMB18AHE3_B/I unidirectional or bidirectional?
P6SMB18AHE3_B/I is a unidirectional TVS diode, as indicated by the "A" suffix (vs. "CA" for bidirectional variants) and explicit marking "18A" on the device body. Its cathode is marked with a band, and it conducts only when the anode is driven positive relative to cathode - essential for protecting DC power rails where polarity is fixed. Bidirectional versions like P6SMB18CA are functionally distinct and not interchangeable.
What is the maximum clamping voltage of P6SMB18AHE3_B/I at its rated peak pulse current?
The maximum clamping voltage (VC) of P6SMB18AHE3_B/I is 25.2 V at 23.8 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform per Figure 1 in the datasheet. This value defines the worst-case voltage imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings.
Does P6SMB18AHE3_B/I meet lead-free and halogen-free requirements?
P6SMB18AHE3_B/I is RoHS-compliant (per EU Directive 2011/65/EU) and uses matte tin-plated leads, satisfying lead-free soldering requirements. However, it is not halogen-free - the "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification, whereas halogen-free versions carry the "HM3" suffix (e.g., P6SMB18AHM3_B/I). Always verify material declarations using Vishay's official compliance documentation.
How does the thermal resistance of P6SMB18AHE3_B/I affect PCB layout?
P6SMB18AHE3_B/I has RθJA = 100 °C/W and RθJL = 20 °C/W, meaning effective thermal management requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal as specified in the datasheet. Reducing pad size increases junction temperature rise during surge events, potentially degrading clamping consistency and long-term reliability - especially under repetitive 0.01% duty cycle conditions.
P6SMB18AHE3_B/I 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:
- 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/I FAQ
1.How can I place an order for P6SMB18AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHE3_B/I 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/I reliable?
The price and inventory of P6SMB18AHE3_B/I 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/I is usually 5 days.
3.What payment methods are accepted for P6SMB18AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHE3_B/I?
P6SMB18AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHE3_B/I 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/I?
For technical support, including P6SMB18AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHE3_B/I requirements.
6.How does Aetrix verify that P6SMB18AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHE3_B/I 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/I meets industry standards.
7.What is the process for return or replacement of P6SMB18AHE3_B/I?
All P6SMB18AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHE3_B/I, 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/I part is unused and in its original packaging.
Return procedure for P6SMB18AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHE3_B/I Tags
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