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Vishay General Semiconductor - Diodes Division P6SMB18CAHE3/5B
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- Part No.:
- P6SMB18CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHE3/5B.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,897
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Product details
Overview
P6SMB18CAHE3/5B 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 clamps up to 25.2 V at 23.8 A peak pulse current under 10/1000 μs waveform - used in automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the P6SMB18CAHE3/5B datasheet, P6SMB18CAHE3/5B pinout, P6SMB18CAHE3/5B application, or P6SMB18CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and 600 W peak pulse power rating with low clamping voltage.
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 characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast transient response and minimal voltage overshoot during ESD or lightning-induced surges.
The device is rated for 600 W peak pulse power (10/1000 μs), derated linearly above 25 °C ambient per Fig. 2, and achieves thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - guaranteed voltage range where device enters avalanche conduction; tight tolerance enables predictable clamping onset |
| VC (Clamping) | 25.2 V at IPPM = 23.8 A - peak voltage seen by protected circuit during 10/1000 μs surge; determines maximum stress on downstream components |
| PPPM | 600 W - peak transient energy absorption capacity under standardized 10/1000 μs waveform; defines robustness against common surge events |
| ID (Leakage) | <1.0 μA at VWM - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max. | +150 °C - maximum junction temperature rating; supports operation in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" × 0.130" footprint; compatible with automated pick-and-place and reflow processes |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration with cathode/anode indistinguishable in layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no fixed polarity marking required |
| Terminal 2 | Anode / Cathode (bidirectional) | Complementary terminal completing symmetrical bidirectional clamping path; identical electrical role to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV open-circuit, 2 kV source impedance) when properly laid out on recommended copper pads |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 3.3 V or 5 V logic inputs and analog front-ends |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing and reduces handling risk |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and LIN nodes from load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp transients before they reach communication ICs. Use Value: Prevents latch-up or permanent damage to transceivers during 12 V system load dump events (up to 35 V, 400 ms), enabled by 15.3 V VWM and 25.2 V VC. |
Use Scenario: Safeguarding PLC analog input channels (4–20 mA, 0–10 V) against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal conditioning front-end, placed before precision op-amps and ADCs. Use Value: Limits transient voltage to ≤25.2 V, preserving measurement accuracy and preventing saturation or damage to 24 V-rated input stages. |
| Consumer USB Port Protection | Telecom Line Interface |
|
Use Scenario: ESD and surge protection for USB 2.0 data lines (D+, D−) in set-top boxes and smart displays exposed to user-handling events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to shunt ESD (IEC 61000-4-2 ±15 kV contact) before transceiver. Use Value: Sub-1 μA leakage at 15.3 V avoids signal degradation; 25.2 V clamping prevents USB PHY damage during fast transients. |
Use Scenario: Overvoltage protection on telephone line interface circuits (POTS, VoIP gateways) subject to lightning-induced surges per ITU-T K.20/21. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines, coordinated with gas discharge tube (GDT) for staged surge handling. Use Value: 600 W PPPM rating handles partial surge energy; 25.2 V clamping complements GDT's higher let-through voltage for optimal coordination. |
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), same SMB package, but lower PPPM (400 W); higher VC (29.2 V at 20.1 A) | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); not recommended for IEC 61000-4-5 Level 3+ or automotive load dump | Select when cost sensitivity outweighs surge robustness and PCB space allows dual-device stacking for enhanced power handling |
| SMCJ18CA | Same VWM and bidirectional function, but larger SMC (DO-214AB) package; higher PPPM (1500 W); lower VC (27.7 V at 54.3 A) | Requires larger PCB footprint and higher thermal mass; better suited for primary-level protection in power supplies or motor drives | Choose when system-level surge requirements exceed 600 W and board layout accommodates 0.280" × 0.240" footprint |
Compared with SMAJ18CA and SMCJ18CA, P6SMB18CAHE3/5B delivers optimal balance of compact SMB footprint, AEC-Q101 qualification, and 600 W surge capability - making it the preferred choice for space-constrained automotive and industrial edge nodes where qualification and standardized mounting are mandatory.
Availability
P6SMB18CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply, AEC-Q101 compliance, and consistent SMB package form factor.
Supply support for P6SMB18CAHE3/5B 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, efficiency, and application-specific optimization.
The P6SMB Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering standardized surge robustness, AEC-Q101 qualification, and surface-mount scalability across voltage grades.
FAQ
What does the "CA" suffix indicate in P6SMB18CAHE3/5B?
The "CA" suffix in P6SMB18CAHE3/5B denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both polarities. This eliminates the need for polarity-aware placement and makes it ideal for protecting AC-coupled signals, differential buses like RS-485 or CAN, and ungrounded power rails - unlike unidirectional variants (e.g., P6SMB18A) that require correct cathode orientation.
Is P6SMB18CAHE3/5B qualified for automotive applications?
Yes, P6SMB18CAHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules, ADAS sensors, and infotainment interfaces.
What is the maximum clamping voltage of P6SMB18CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of P6SMB18CAHE3/5B is 25.2 V at a peak pulse current (IPPM) of 23.8 A, measured using the standardized 10/1000 μs double-exponential waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events and is critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within absolute maximum ratings.
How does the SMB (DO-214AA) package of P6SMB18CAHE3/5B compare to SMA or SMC packages?
The SMB (DO-214AA) package of P6SMB18CAHE3/5B measures 0.220" × 0.130", smaller than SMC (DO-214AB) but larger than SMA (DO-214AC). It offers a balanced trade-off: sufficient power handling (600 W) for most board-level protection, compatibility with standard pick-and-place equipment, and better thermal performance than SMA - while maintaining a compact footprint essential for dense automotive and industrial PCB layouts.
What is the significance of the "/5B" in P6SMB18CAHE3/5B?
The "/5B" suffix in P6SMB18CAHE3/5B specifies the packaging format: 13-inch diameter plastic tape and reel containing 3200 units. This delivery mode supports high-volume automated assembly and aligns with industry-standard logistics for surface-mount components. The "HE3" portion confirms RoHS-compliance and AEC-Q101 qualification, while "5B" is purely a packaging code unrelated to electrical or thermal performance.
P6SMB18CAHE3/5B 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:
- Discontinued at Digi-Key
- 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)
P6SMB18CAHE3/5B FAQ
1.How can I place an order for P6SMB18CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHE3/5B 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 P6SMB18CAHE3/5B reliable?
The price and inventory of P6SMB18CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18CAHE3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHE3/5B?
P6SMB18CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHE3/5B 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 P6SMB18CAHE3/5B?
For technical support, including P6SMB18CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHE3/5B requirements.
6.How does Aetrix verify that P6SMB18CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHE3/5B 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 P6SMB18CAHE3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHE3/5B?
All P6SMB18CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHE3/5B, 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 P6SMB18CAHE3/5B part is unused and in its original packaging.
Return procedure for P6SMB18CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHE3/5B Tags
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