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Vishay General Semiconductor - Diodes Division P6SMB18CAHM3_B/H
- Part No.:
- P6SMB18CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHM3_B/H.pdf
- Description:
- 600W,18V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,572
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Product details
Overview
P6SMB18CAHM3_B/H 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 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 - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the P6SMB18CAHM3_B/H datasheet, P6SMB18CAHM3_B/H pinout, P6SMB18CAHM3_B/H application, or P6SMB18CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 ESD/EFT/surge immunity standards.
Technical Context
The P6SMB18CAHM3_B/H 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 fast response time (<1 ns), while its low thermal resistance (RθJL = 20 °C/W) supports reliable energy dissipation during repetitive surges.
Rated for 150 °C maximum junction temperature and MSL Level 1 per J-STD-020 (260 °C reflow peak), it delivers 600 W peak pulse power under 10/1000 μs waveform at 0.01% duty cycle, with derating above 25 °C ambient per Fig. 2. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 17.1–18.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 25.2 V at IPPM = 23.8 A - Peak voltage seen by protected circuit during 600 W surge; determines downstream component stress. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; enables robust protection against lightning-induced surges. |
| IPPM | 23.8 A - Maximum non-repetitive peak pulse current; defines surge current capacity before failure. |
| TJ max. | 150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-temperature industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.220" footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as anode or cathode depending on transient polarity; enables clamp-to-rail protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control units and ADAS sensor interfaces. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge events without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage stress on protected ICs - e.g., keeps microcontroller I/O pins below absolute maximum ratings during ESD events. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU automotive and industrial electronics; JESD 201 Class 2 whisker resistance certified. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - simplifies manufacturing logistics and reduces assembly risk. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital 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: Bidirectional clamping element placed across differential signal pairs or supply rails to limit transient excursions within IC safe operating area. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs during ISO 7637-2 Pulse 1/2a/5a events, leveraging 15.3 V VWM and 25.2 V VC. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on channel-level inputs, positioned upstream of optocouplers or Schmitt-trigger receivers. Use Value: Enables >100,000 surge cycles at 23.8 A without parameter shift, maintaining long-term system uptime in factory automation environments. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary protection on Ethernet PHY power rails and data lines in enterprise switches exposed to induced lightning surges via PoE cabling. IC Role / Device Role / Timing Role: Fast-response shunt device that activates within <1 ns to divert surge energy away from sensitive PHY ICs and magnetics. Use Value: Achieves IEC 61000-4-5 4 kV surge immunity with minimal capacitance (<100 pF), preserving 100BASE-TX signal integrity. |
Use Scenario: Clamping voltage spikes generated by brushed DC motor commutation in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge outputs to absorb inductive kickback energy. Use Value: Limits flyback voltage to ≤25.2 V, preventing MOSFET avalanche failure and reducing EMI emissions during motor shutdown. |
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; not AEC-Q101 qualified; unsuitable for automotive under-hood use. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±8 kV contact discharge only. |
| 1.5KE18CA | Same VWM/VC, higher PPPM (1500 W), axial DO-201 package (through-hole, manual assembly). | Requires PCB through-holes and wave soldering; incompatible with SMT-only production; larger board area. | Choose for legacy designs or high-surge test labs where manual replacement and thermal mass outweigh automation needs. |
Compared with SMAJ18CA and 1.5KE18CA, the P6SMB18CAHM3_B/H uniquely combines AEC-Q101 qualification, 600 W surge capability, and SMB surface-mount compatibility - making it the optimal choice for automotive and industrial SMT production requiring validated reliability and process scalability.
Availability
P6SMB18CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and consumer appliance motor drives requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P6SMB18CAHM3_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 TVS devices with emphasis on reliability, efficiency, and application-specific performance.
The P6SMB series was developed to deliver high-power, surface-mount transient protection for automotive and industrial electronics - balancing clamping precision, surge robustness, and manufacturability in compact SMB packages.
FAQ
What does the "CA" suffix indicate in P6SMB18CAHM3_B/H?
The "CA" suffix denotes a bidirectional configuration - meaning the P6SMB18CAHM3_B/H provides symmetrical clamping for both positive and negative transients without polarity dependence. This eliminates orientation concerns during placement and supports protection of AC-coupled or differential signal paths, unlike unidirectional variants (e.g., P6SMB18A) which require correct cathode alignment.
Is P6SMB18CAHM3_B/H suitable for automotive applications?
Yes, P6SMB18CAHM3_B/H is AEC-Q101 qualified (as indicated by the "HM3" and "_B/H" suffixes), tested for temperature cycling, humidity bias, and mechanical shock per automotive reliability standards. It is explicitly rated for under-hood and body-control module use, supporting ISO 7637-2 and IEC 61000-4-5 compliance in ECU and ADAS subsystems.
What is the maximum clamping voltage of P6SMB18CAHM3_B/H at rated surge current?
The maximum clamping voltage (VC) of P6SMB18CAHM3_B/H is 25.2 V at 23.8 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed per datasheet Table on page 2 and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
How does the SMB (DO-214AA) package of P6SMB18CAHM3_B/H compare to SMA or SMC?
The SMB package of P6SMB18CAHM3_B/H offers a 0.205" × 0.220" footprint - larger than SMA (0.175" × 0.155") but smaller than SMC (0.285" × 0.235"). It provides superior thermal dissipation (RθJL = 20 °C/W) versus SMA while retaining compatibility with standard 7" tape-and-reel feeders and reflow profiles, making it ideal for high-volume automotive SMT lines.
Does P6SMB18CAHM3_B/H require derating at elevated ambient temperatures?
Yes, P6SMB18CAHM3_B/H must be derated above 25 °C ambient per Figure 2 in the datasheet: peak pulse power decreases linearly to ~50% at 125 °C junction temperature. Designers must apply thermal modeling using RθJA = 100 °C/W and RθJL = 20 °C/W to ensure sustained surge capability in high-temperature enclosures or near heat sources.
P6SMB18CAHM3_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)
P6SMB18CAHM3_B/H FAQ
1.How can I place an order for P6SMB18CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHM3_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 P6SMB18CAHM3_B/H reliable?
The price and inventory of P6SMB18CAHM3_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 P6SMB18CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHM3_B/H?
P6SMB18CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHM3_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 P6SMB18CAHM3_B/H?
For technical support, including P6SMB18CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB18CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHM3_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 P6SMB18CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHM3_B/H?
All P6SMB18CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHM3_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 P6SMB18CAHM3_B/H part is unused and in its original packaging.
Return procedure for P6SMB18CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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