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Vishay General Semiconductor - Diodes Division P6SMB18CAHE3_A/I
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- Part No.:
- P6SMB18CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHE3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,015
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Product details
Overview
P6SMB18CAHE3_A/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 and power 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 control systems.
For engineers reviewing the P6SMB18CAHE3_A/I datasheet, P6SMB18CAHE3_A/I pinout, P6SMB18CAHE3_A/I application, or P6SMB18CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and thermal resistance (RθJA = 100 °C/W) for board-level surge protection design.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the 10/1000 μs waveform rating reflects standardized surge immunity testing per IEC 61000-4-5.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supporting automated SMT assembly. Its 20 °C/W junction-to-lead thermal resistance supports localized heat dissipation during transient events when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - Voltage at which device enters avalanche conduction; tight tolerance enables predictable turn-on timing. |
| VC (Clamping Voltage) | 25.2 V at 23.8 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Maximum transient energy absorption capability under standard 10/1000 μs waveform; defines single-event surge robustness. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs derating requirements above 25 °C ambient for sustained reliability. |
| TJ max. | 150 °C - Maximum allowable junction temperature; sets upper limit for thermal design and power cycling endurance. |
| 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, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical structure; completes low-impedance path to ground or reference rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity constraints - e.g., RS-485, CAN, or sensor bridges. |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance grounding paths. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and lifetime reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile use (peak 260 °C), eliminating bake requirements prior to assembly. |
| Glass passivated junction | Ensures stable VBR over time and temperature, low leakage (<1 μA), and resistance to humidity-induced parameter drift. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground to clamp ±25 V transients before reaching ADC input or op-amp buffer. Use Value: Prevents latch-up or permanent damage to precision front-end circuitry while maintaining signal integrity below 15.3 V normal operation. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers subjected to field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting fast-rising transients (>1 kV/μs) to common ground, limiting voltage seen by optocoupler input stage. Use Value: Extends mean time between failures (MTBF) of I/O modules by absorbing repetitive 600 W pulses without degradation over 10⁵ cycles. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver pins in building automation gateways connected to long twisted-pair runs susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to local ground, clamping common-mode and differential transients simultaneously. Use Value: Maintains data integrity up to 10 Mbps by limiting clamped voltage to 25.2 V - well below transceiver absolute maximum ratings. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machine control boards during commutation and stall conditions. IC Role / Device Role / Timing Role: Mounted across motor terminals to divert inductive kickback energy away from MCU GPIOs and driver FETs. Use Value: Eliminates need for snubber RC networks, reducing BOM count and PCB area while achieving <100 ns response time. |
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 SMB package, 18 V nominal VBR, but lower PPPM (400 W) and higher VC (29.2 V at 13.7 A). | Limited to less severe surge environments (e.g., consumer-grade I/O); not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification or 600 W surge headroom. |
| 1.5KE18CA | Through-hole DO-201 package, same 18 V rating, 600 W PPPM, but RθJA ≈ 150 °C/W and no AEC-Q101 validation. | Suitable for prototyping or legacy through-hole designs; incompatible with high-density SMT layouts. | Choose only if board redesign for SMT is impractical and thermal derating can accommodate higher junction rise. |
Compared with SMAJ18CA and 1.5KE18CA, P6SMB18CAHE3_A/I delivers superior automotive-grade reliability, tighter clamping (25.2 V vs. ≥29.2 V), and optimized thermal performance for compact SMT layouts - making it the preferred choice for production automotive and industrial systems requiring validated surge resilience.
Availability
P6SMB18CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and appliance motor control circuits requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for P6SMB18CAHE3_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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB series was developed to deliver high-power, low-clamping TVS protection in compact surface-mount packages for automotive, industrial, and communications equipment where space, thermal performance, and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of P6SMB18CAHE3_A/I at its rated peak pulse current?
The P6SMB18CAHE3_A/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 represents the highest voltage imposed on the protected circuit during a full-rated surge event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2, Electrical Characteristics table for P6SMB18CA.
Is P6SMB18CAHE3_A/I suitable for automotive applications?
Yes, P6SMB18CAHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3" suffix and documented in the Vishay P6SMB datasheet. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it appropriate for under-hood and chassis-mounted automotive electronics where reliability under harsh thermal and electrical conditions is mandatory.
What does the "CA" suffix signify in P6SMB18CAHE3_A/I?
The "CA" suffix in P6SMB18CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., P6SMB18A), this version has no cathode band marking and functions identically whether voltage stress is positive or negative relative to ground, ideal for AC or differential signal protection.
What is the standoff voltage (VWM) of P6SMB18CAHE3_A/I, and why does it matter?
The standoff voltage (VWM) of P6SMB18CAHE3_A/I is 15.3 V - the maximum continuous reverse voltage the device can block without entering avalanche conduction. This parameter ensures normal circuit operation remains undisturbed while providing sufficient margin below the 17.1–18.9 V breakdown range, preventing false triggering during nominal voltage fluctuations or ripple.
How does the SMB (DO-214AA) package of P6SMB18CAHE3_A/I compare to SMA in surge handling?
The SMB (DO-214AA) package of P6SMB18CAHE3_A/I offers higher surge capability than SMA equivalents due to larger die attach area and lower thermal resistance (RθJL = 20 °C/W). While both are surface-mount, SMB supports 600 W peak pulse power versus ~400 W for SMA-bodied devices like SMAJ18CA - directly enabling more robust protection in space-constrained yet high-stress applications.
P6SMB18CAHE3_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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB18CAHE3_A/I FAQ
1.How can I place an order for P6SMB18CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHE3_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 P6SMB18CAHE3_A/I reliable?
The price and inventory of P6SMB18CAHE3_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 P6SMB18CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHE3_A/I?
P6SMB18CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHE3_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 P6SMB18CAHE3_A/I?
For technical support, including P6SMB18CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHE3_A/I requirements.
6.How does Aetrix verify that P6SMB18CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHE3_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 P6SMB18CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHE3_A/I?
All P6SMB18CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHE3_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 P6SMB18CAHE3_A/I part is unused and in its original packaging.
Return procedure for P6SMB18CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHE3_A/I Tags
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