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Vishay General Semiconductor - Diodes Division P6SMB18AHE3_A/I
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- Part No.:
- P6SMB18AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHE3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,784
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Product details
Overview
P6SMB18AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, 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 test current, 25.2 V maximum clamping voltage at 23.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the P6SMB18AHE3_A/I datasheet, P6SMB18AHE3_A/I pinout, P6SMB18AHE3_A/I application, or P6SMB18AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, SMB (DO-214AA) package compatibility, unidirectional polarity with cathode band marking, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
The P6SMB18AHE3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR range (17.1–18.9 V) and temperature coefficient of +0.088 %/°C, ensuring stable overvoltage protection across operating junction temperatures from –65 °C to +150 °C.
It is rated for 600 W peak pulse power per 10/1000 μs waveform, with derating above 25 °C ambient per Fig. 2, and supports 100 A non-repetitive forward surge current (IFSM) at 8.3 ms half-sine. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, confirming suitability for compact PCB layouts without active cooling.
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 events. |
| VC (Clamping) | 25.2 V at 23.8 A IPPM - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for IC-level stress limits. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 μs waveform; enables robust protection against lightning-induced or inductive-switching transients. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; compatible with automated placement and reflow soldering per J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or ESD event. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or sensor output); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges on 12 V systems without parallel staging. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity stress. |
| Low profile SMB package | Reduces board space vs. larger DO-15 or DO-201 packages while maintaining thermal performance via optimized pad layout. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp transients before they reach sensitive input stages. Use Value: Limits voltage to ≤25.2 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Shielding digital input/output terminals of programmable logic controllers from field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff-clamp device on 24 V DC I/O lines, absorbing energy from relay coil flyback and motor switching noise. Use Value: Maintains system uptime by preventing false triggering or permanent failure in DIN-rail mounted control hardware. |
| DC Power Rail Protection | Consumer Power Adapter Input |
Use Scenario: Safeguarding 12 V/24 V DC power distribution networks in embedded systems against inductive kickback and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main supply rail upstream of DC-DC converters and LDOs. Use Value: Clamps 600 W surges within 1 ns, preserving downstream regulator integrity and avoiding brownout resets. |
Use Scenario: Surge suppression at AC-DC adapter primary-side rectifier output or secondary-side 5 V/12 V rails. IC Role / Device Role / Timing Role: Secondary-side TVS protecting USB charging ports, display backlight drivers, and microcontroller power pins. Use Value: Complies with IEC 61000-4-5 and UL 1449 requirements using a single discrete component with no external biasing. |
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, 18 V nominal VBR, but rated for 400 W PPPM and lacks AEC-Q101 qualification. | Targeted at commercial-grade consumer and computing applications; not validated for automotive temperature cycling or vibration. | Select SMAJ18A only for cost-sensitive non-automotive designs where 400 W surge capacity suffices. |
| 1.5SMC18A | Higher-power 1500 W variant in larger SMC (DO-214AB) package; identical VBR and VC specs but requires 30% more PCB area. | Used where higher surge repetition rate or longer waveform compliance (e.g., IEC 61000-4-5 1.2/50 μs) is required. | Choose 1.5SMC18A when system-level testing demands >600 W headroom or legacy SMC footprint compatibility is mandatory. |
Compared with SMAJ18A and 1.5SMC18A, the P6SMB18AHE3_A/I uniquely balances automotive qualification, 600 W capability, and SMB footprint - making it optimal for space-constrained, high-reliability 12 V systems where AEC-Q101 compliance and consistent clamping are non-negotiable.
Availability
P6SMB18AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and DC power rail surge suppression requiring stable component supply across extended production lifecycles.
Supply support for P6SMB18AHE3_A/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 and application-specific performance.
The P6SMB Series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping, AEC-Q101 validation, and surface-mount scalability from 6.8 V to 540 V standoff ratings.
FAQ
What is the clamping voltage of P6SMB18AHE3_A/I at its rated peak pulse current?
The P6SMB18AHE3_A/I has a maximum clamping voltage (VC) of 25.2 V at 23.8 A peak pulse current (IPPM), measured under standardized 10/1000 μs waveform conditions. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB18AHE3_A/I maintains this clamping performance due to its low incremental surge resistance and stable avalanche characteristics.
Is P6SMB18AHE3_A/I qualified for automotive applications?
Yes, P6SMB18AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 09-Jan-2024. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev G. The P6SMB18AHE3_A/I is explicitly designated for under-hood and chassis-mounted automotive systems where reliability under thermal and vibration stress is mandatory.
What does the "_A/I" suffix indicate in P6SMB18AHE3_A/I?
The "_A/I" suffix in P6SMB18AHE3_A/I specifies packaging and reel configuration: "A" denotes the unidirectional variant, and "I" indicates 13-inch diameter plastic tape-and-reel delivery with 3200 units per reel. This matches Vishay's ordering convention where "H" is 7-inch reel (750 units) and "I" is 13-inch reel (3200 units). The P6SMB18AHE3_A/I is RoHS-compliant, halogen-free, and AEC-Q101 qualified per base code HE3.
How does P6SMB18AHE3_A/I differ from bidirectional variants like P6SMB18CA?
P6SMB18AHE3_A/I is unidirectional with cathode-band polarity marking and specified for use between a positive rail and ground; P6SMB18CA is bidirectional, symmetric in both directions, and used for AC line or differential signal protection. The P6SMB18AHE3_A/I has a 15.3 V VWM and 17.1–18.9 V VBR, whereas P6SMB18CA has 15.3 V VWM in each direction but identical clamping. Their electrical specs align except for polarity-dependent parameters like forward voltage and IFSM, which apply only to unidirectional types like P6SMB18AHE3_A/I.
What is the thermal resistance of P6SMB18AHE3_A/I, and how does it affect PCB layout?
The P6SMB18AHE3_A/I 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 - as defined in Vishay's test condition. This value assumes minimum recommended pad layout; reducing pad size increases RθJA and risks thermal runaway during repetitive surges. For reliable operation, maintain the specified pad dimensions and avoid excessive copper removal near the SMB footprint. The P6SMB18AHE3_A/I's RθJA directly determines maximum allowable average power dissipation in continuous operation.
P6SMB18AHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB18AHE3_A/I FAQ
1.How can I place an order for P6SMB18AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHE3_A/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_A/I reliable?
The price and inventory of P6SMB18AHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB18AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHE3_A/I?
P6SMB18AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHE3_A/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_A/I?
For technical support, including P6SMB18AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHE3_A/I requirements.
6.How does Aetrix verify that P6SMB18AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB18AHE3_A/I?
All P6SMB18AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for P6SMB18AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHE3_A/I Tags
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