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Vishay General Semiconductor - Diodes Division P6SMB18CAHE3_B/H
- Part No.:
- P6SMB18CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHE3_B/H.pdf
- Description:
- 600W,18V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,433
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Product details
Overview
P6SMB18CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 18 V standoff voltage (VWM), 25.2 V maximum clamping voltage at 23.8 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed for surge protection on signal lines and power rails in automotive sensor units and industrial control interfaces.
For engineers reviewing the P6SMB18CAHE3_B/H datasheet, P6SMB18CAHE3_B/H pinout, P6SMB18CAHE3_B/H application, or P6SMB18CAHE3_B/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding its breakdown threshold (17.1–18.9 V at 1 mA), it rapidly switches to low-impedance conduction, diverting surge current away from downstream circuitry while maintaining clamped voltage ≤25.2 V. Its bidirectional architecture ensures symmetrical response to positive and negative transients without polarity dependency.
Designed for high-reliability environments, P6SMB18CAHE3_B/H features glass-passivated junctions, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and _B revision code indicating AEC-Q101 compliance per ordering information table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping onset |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - precise voltage threshold where avalanche conduction initiates under controlled test conditions |
| VC (Clamping Voltage) | 25.2 V at IPPM = 23.8 A - maximum voltage seen across protected circuit during 10/1000 μs surge, critical for IC survivability |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 μs waveform; determines robustness against lightning-induced surges |
| ID (Max Reverse Leakage) | 1.0 μA at VWM - ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max | 150 °C - maximum junction temperature enabling operation in under-hood automotive or industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
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; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts surge current during negative transients; no marking on bidirectional devices |
| Cathode | Transient current sink (bidirectional) | Conducts surge current during positive transients; no marking on bidirectional devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR and VC performance for ± polarity transients - eliminates need for polarity-aware layout or external diode pairing |
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly mounted on 5 mm × 5 mm copper pads |
| AEC-Q101 qualification (HE3_B) | Validated for automotive electronics including engine control modules, ADAS sensors, and body control units requiring long-term field reliability |
| Low profile SMB package | 0.130" × 0.155" footprint enables dense PCB layouts while maintaining thermal performance via RθJL = 20 °C/W |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives - critical for harsh-environment deployments |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector interface or IC input pins to clamp fast-rising surges before they reach sensitive silicon. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1/2a/5a stress while meeting AEC-Q100 stress test requirements due to AEC-Q101 qualification. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, coordinated with series current-limiting resistors and optocouplers. Use Value: Enables >100,000 surge cycles at 23.8 A without degradation, supporting industrial equipment MTBF targets exceeding 10 years. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station remote units from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across data lines and common-mode to chassis ground to suppress both modes simultaneously. Use Value: Symmetrical clamping ensures equal protection on TX+/TX− and RX+/RX− pairs without skew or timing asymmetry. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber element across motor terminals or H-bridge outputs to limit dv/dt and prevent MOSFET avalanche failure. Use Value: 25.2 V clamping voltage prevents gate oxide breakdown in 30 V-rated logic-level MOSFETs used in compact motor drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM (15.3 V) and VC (25.2 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 150 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump where 600 W is required | Select only for space-constrained consumer designs with verified <400 W surge exposure |
| 1.5SMC18CA | Same electrical specs but larger SMC (DO-214AB) package; higher thermal mass, RθJL = 15 °C/W, and 1.5 kW PPPM rating | Overqualified for most P6SMB18CAHE3_B/H use cases; adds 30% board area and cost without functional benefit | Choose only when legacy SMC footprint exists or extreme thermal cycling reliability is mandated beyond AEC-Q101 |
Compared with SMAJ18CA and 1.5SMC18CA, P6SMB18CAHE3_B/H delivers optimal balance of AEC-Q101 qualification, 600 W surge handling, SMB footprint efficiency, and production-ready SMT compatibility - making it the preferred choice for new automotive and industrial designs targeting IPC-A-610 Class 2/3 assembly.
Availability
P6SMB18CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, telecom line interfaces, and consumer appliance motor control systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P6SMB18CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The P6SMB Series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance, AEC-Q101 validation, and robust SMT manufacturability in the SMB package.
FAQ
What does the "CA" suffix indicate in P6SMB18CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration: P6SMB18CAHE3_B/H provides symmetrical clamping for both positive and negative voltage transients, unlike unidirectional "A" variants. This eliminates polarity concerns during PCB layout and enables single-device protection of AC-coupled or differential signal paths - a core design feature confirmed in Vishay's P6SMB Series documentation under "DEVICES FOR BIDIRECTION APPLICATIONS".
Is P6SMB18CAHE3_B/H RoHS-compliant and halogen-free?
Yes, P6SMB18CAHE3_B/H is RoHS-compliant per EU Directive 2011/65/EU and halogen-free, as indicated by the "HE3" base suffix and documented in the Mechanical Data section. The "HE3" designation confirms compliance with Vishay's material categorization standard (www.vishay.com/doc?99912) and meets JESD201 Class 2 whisker resistance requirements.
What is the meaning of the "_B/H" suffix in P6SMB18CAHE3_B/H?
The "_B" denotes AEC-Q101 qualification for the P6SMB18CAHE3_B/H device, while "/H" specifies packaging in 7" diameter plastic tape and reel with 750 units per reel - per the Ordering Information table on page 3 of the Vishay P6SMB datasheet (Document Number: 88370). This suffix combination confirms automotive-grade reliability and standard SMT delivery format.
How does P6SMB18CAHE3_B/H perform under repeated surge stress?
P6SMB18CAHE3_B/H supports repetitive surge events at 0.01% duty cycle (per datasheet), meaning it can withstand repeated 10/1000 μs pulses up to 600 W without parameter shift - provided junction temperature remains within -65 °C to +150 °C. Its glass-passivated junction and low incremental surge resistance ensure stable clamping voltage over >10⁵ cycles in validated automotive applications.
Can P6SMB18CAHE3_B/H replace P6SMB18AHE3_B/H in a design?
No - P6SMB18CAHE3_B/H is bidirectional, while P6SMB18AHE3_B/H is unidirectional. Substituting them would compromise protection on negative transients, as the unidirectional variant only clamps in one polarity. The "CA" vs. "A" distinction is fundamental: datasheet tables explicitly separate electrical characteristics for CA (bidirectional) and A (unidirectional) parts, confirming non-interchangeability without circuit redesign.
P6SMB18CAHE3_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:
- -
- 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/H FAQ
1.How can I place an order for P6SMB18CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHE3_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 P6SMB18CAHE3_B/H reliable?
The price and inventory of P6SMB18CAHE3_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 P6SMB18CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHE3_B/H?
P6SMB18CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHE3_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 P6SMB18CAHE3_B/H?
For technical support, including P6SMB18CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHE3_B/H requirements.
6.How does Aetrix verify that P6SMB18CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHE3_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 P6SMB18CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHE3_B/H?
All P6SMB18CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHE3_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 P6SMB18CAHE3_B/H part is unused and in its original packaging.
Return procedure for P6SMB18CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHE3_B/H Tags
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