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Vishay General Semiconductor - Diodes Division P6SMB18CAHE3_B/I
- Part No.:
- P6SMB18CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHE3_B/I.pdf
- Description:
- 600W,18V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,065
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Product details
Overview
P6SMB18CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 15.3 V stand-off voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA test current, and 25.2 V maximum clamping voltage (VC) at 23.8 A peak pulse current (IPPM), with 600 W peak pulse power capability under 10/1000 μs waveform.
For engineers reviewing the P6SMB18CAHE3_B/I datasheet, P6SMB18CAHE3_B/I pinout, P6SMB18CAHE3_B/I application, or P6SMB18CAHE3_B/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification for automotive use, SMB (DO-214AA) package compatibility, and low incremental surge resistance for robust ESD and lightning surge protection in sensor interfaces and power rails.
Technical Context
The P6SMB18CAHE3_B/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while its thermal resistance (RθJA = 100 °C/W) supports operation up to +150 °C junction temperature.
It delivers 600 W peak pulse power per 10/1000 μs waveform with 0.01% duty cycle, and exhibits fast response time (<1.0 ns) and low clamping ratio (VC/VBR ≈ 1.43), enabling effective protection of downstream ICs such as microcontrollers, MOSFET gate drivers, and analog front-ends against inductive switching spikes and EFT events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping) | 25.2 V at 23.8 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for IC voltage tolerance compliance. |
| PPPM | 600 W - Peak transient energy absorption capacity; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock; designated by HE3_B suffix. |
| Mounting Pad | 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - Required layout for rated thermal dissipation and IPPM performance. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional device with no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR; no cathode band or polarity identifier. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power (10/1000 μs) | Supports high-energy surge suppression in industrial motor drives and automotive power distribution networks. |
| AEC-Q101 qualified (HE3_B variant) | Validates long-term reliability under automotive temperature, vibration, and lifetime stress conditions. |
| MSL Level 1 (260 °C peak reflow) | Permits standard lead-free reflow assembly without moisture sensitivity handling restrictions. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature cycling. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pair or supply rail to limit transient overvoltage before it reaches sensitive analog input stages. Use Value: Maintains signal integrity under 100 V/50 ms load dump events while preserving <1.0 μA leakage at 15.3 V nominal supply. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and EFT bursts. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between signal line and ground to shunt induced transients without affecting loop accuracy. Use Value: Clamps to ≤25.2 V during 23.8 A surges, preventing op-amp saturation and ADC overrange in precision measurement circuits. |
| Telecom Power Rail Protection | Consumer USB Port ESD Protection |
Use Scenario: Shielding 12 V/24 V DC power inputs of VoIP phones and base stations from lightning-induced surges on PoE or external power feeds. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input rail, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs 600 W transient energy without degradation, maintaining system uptime during outdoor installation lightning exposure. |
Use Scenario: Secondary-level transient suppression on VBUS and D+/D− lines of USB 2.0 ports in smart speakers and set-top boxes. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp limiting ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-1 ns response and 25.2 V clamping prevent latch-up in USB transceivers while meeting USB-IF electrical compliance limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM (15.3 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 3 or automotive load dump. | Select only for space-constrained consumer designs where 400 W surge rating suffices. |
| 1.5KE18CA | Higher power (1500 W), axial-leaded DO-201 package; no AEC-Q101 qualification. | Requires through-hole assembly; not suitable for automated SMT production or automotive under-hood environments. | Choose for legacy board upgrades or high-surge industrial equipment where leaded mounting is acceptable. |
Compared with SMAJ18CA and 1.5KE18CA, the P6SMB18CAHE3_B/I uniquely combines 600 W surge rating, SMB SMT compatibility, and AEC-Q101 qualification-making it the only option among the three validated for automotive-grade surface-mount transient suppression with production-ready reflow support.
Availability
P6SMB18CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom power supplies, and consumer USB interface protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for P6SMB18CAHE3_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, rectifiers, MOSFETs, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems-delivering consistent clamping performance, AEC-Q101 validation, and standardized SMB packaging for scalable manufacturing.
FAQ
What is the clamping voltage of P6SMB18CAHE3_B/I at its rated peak pulse current?
The P6SMB18CAHE3_B/I has a maximum clamping voltage (VC) of 25.2 V at 23.8 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is confirmed in the Vishay datasheet (Document Number: 88370, page 2) and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB18CAHE3_B/I maintains this clamping performance across its operational temperature range and after repeated surge exposures.
Is P6SMB18CAHE3_B/I suitable for automotive applications?
Yes, P6SMB18CAHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3_B" suffix in its ordering code. It has undergone full automotive stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock-and is approved for under-hood and body-control module applications. The P6SMB18CAHE3_B/I meets the reliability requirements for automotive sensor protection, infotainment power rails, and LIN/CAN interface circuits.
What does the "CA" suffix mean in P6SMB18CAHE3_B/I?
The "CA" suffix in P6SMB18CAHE3_B/I denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions, with identical VBR, VC, and IPPM values in either polarity. Unlike unidirectional variants (e.g., P6SMB18A), the P6SMB18CAHE3_B/I has no cathode marking and is used where polarity-independent clamping is required-such as across AC signal lines or floating power domains.
What PCB pad layout is required to achieve the rated 600 W peak pulse power for P6SMB18CAHE3_B/I?
To achieve the full 600 W peak pulse power rating, P6SMB18CAHE3_B/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet (page 5, "Mounting Pad Layout"). Smaller pads reduce thermal dissipation and derate IPPM and PPPM performance. The P6SMB18CAHE3_B/I's thermal resistance (RθJA = 100 °C/W) assumes this layout; deviation requires recalculating safe operating area using Fig. 2 in the datasheet.
How does P6SMB18CAHE3_B/I differ from P6SMB18AHE3_B/I?
The P6SMB18CAHE3_B/I is bidirectional (CA), while P6SMB18AHE3_B/I is unidirectional (A). Their VWM (15.3 V), VBR (17.1–18.9 V), and VC (25.2 V) match, but the unidirectional version has a cathode band and conducts only in reverse bias-requiring correct polarity placement. The P6SMB18CAHE3_B/I eliminates polarity concerns and is preferred for AC-coupled or differential lines. Both share SMB package, AEC-Q101 qualification, and 600 W rating.
P6SMB18CAHE3_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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB18CAHE3_B/I FAQ
1.How can I place an order for P6SMB18CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHE3_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 P6SMB18CAHE3_B/I reliable?
The price and inventory of P6SMB18CAHE3_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 P6SMB18CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHE3_B/I?
P6SMB18CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHE3_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 P6SMB18CAHE3_B/I?
For technical support, including P6SMB18CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHE3_B/I requirements.
6.How does Aetrix verify that P6SMB18CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHE3_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 P6SMB18CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHE3_B/I?
All P6SMB18CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHE3_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 P6SMB18CAHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB18CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHE3_B/I Tags
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