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Vishay General Semiconductor - Diodes Division P6SMB18CAHM3_A/I
- Part No.:
- P6SMB18CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHM3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB18CAHM3_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 or power lines. It features a 15.3 V standoff voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA test current, and clamps 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 P6SMB18CAHM3_A/I datasheet, P6SMB18CAHM3_A/I pinout, P6SMB18CAHM3_A/I application, or P6SMB18CAHM3_A/I 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, 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 low incremental surge resistance supports fast transient response and tight clamping.
The device is rated for 600 W peak pulse power (10/1000 μs), derated above 25 °C per thermal curve Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 150 °C maximum junction temperature and 100 °C/W junction-to-ambient thermal resistance define PCB pad layout requirements for sustained power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | ≤25.2 V at IPPM = 23.8 A - Peak voltage seen by protected circuit during 600 W transient; critical for IC survivability |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized 10/1000 μs surge; validates robustness against IEC 61000-4-5 surges |
| TJ max | +150 °C - Maximum allowable junction temperature; constrains thermal design and derating above 25 °C ambient |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and IPC-7351B land patterns |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes halogen-free RoHS + AEC-Q101 |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional construction means no polarity marking; terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage events relative to cathode |
| Cathode | Transient return path (bidirectional) | Connects to protected line; functions identically to anode due to symmetrical structure; no polarity dependency |
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 |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance when properly mounted on 5.0 mm × 5.0 mm copper pads |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and infotainment power inputs |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic-level components downstream |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements prior to assembly |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground (or supply rail), absorbing transient energy before it reaches sensitive input stages. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs and transceiver ICs during 12 V/24 V system surges up to 400 V, leveraging 25.2 V clamping at 23.8 A. |
Use Scenario: Shielding 24 V digital input modules in programmable logic controllers from inductive kickback caused by relay or solenoid switching. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across input terminal and common reference, diverting surge current away from optocoupler input LED or Schmitt trigger. Use Value: Maintains functional safety integrity by limiting input voltage to ≤25.2 V during 600 W transients, ensuring reliable state detection and preventing false triggering. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY magnetics or DSL line drivers against lightning-induced surges entering via RJ-45 ports in residential gateways. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to chassis ground, clamping differential and common-mode transients simultaneously. Use Value: Achieves >20 kV ESD contact discharge immunity and 4 kV IEC 61000-4-5 surge protection using compact SMB footprint, reducing BOM count vs. discrete resistor-capacitor networks. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Mounted across motor terminals or between H-bridge output and supply rail to clamp inductive flyback voltage. Use Value: Extends MOSFET lifespan by limiting drain-source voltage to ≤25.2 V during 23.8 A flyback events, avoiding avalanche stress beyond SOA 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 = 150 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without derating | Select when space-constrained layouts prioritize size over surge margin, and thermal management allows higher junction rise |
| 1.5KE18CA | Same VWM/VBR/VC specs, but through-hole DO-201 package; 1500 W PPPM rating | Requires PCB through-holes and wave soldering; better thermal dissipation but incompatible with fully SMT lines | Choose for legacy designs or high-reliability industrial systems where mechanical robustness and higher surge headroom outweigh SMT compatibility |
Compared with P6SMB18CAHM3_A/I, SMAJ18CA trades 33 % lower surge capacity and worse thermal performance for smaller size, while 1.5KE18CA offers 2.5× higher pulse power in a non-SMT form factor - making P6SMB18CAHM3_A/I the optimal balance of AEC-Q101 compliance, 600 W capability, and full SMT manufacturability.
Availability
P6SMB18CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and consistent SMB package delivery.
Supply support for P6SMB18CAHM3_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, MOSFETs, and passive components with emphasis on reliability and automotive-grade validation.
The P6SMB series targets high-energy transient suppression in space-constrained, high-volume applications - engineered specifically for AEC-Q101 compliance, automated assembly, and robust clamping performance across consumer, industrial, and automotive domains.
FAQ
What does the "CA" suffix indicate in P6SMB18CAHM3_A/I?
The "CA" suffix in P6SMB18CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This eliminates polarity concerns during board layout and enables use on AC-coupled lines, differential buses, or ungrounded rails - unlike unidirectional variants (e.g., P6SMB18A) that require correct cathode orientation.
Is P6SMB18CAHM3_A/I suitable for automotive applications?
Yes, P6SMB18CAHM3_A/I is AEC-Q101 qualified (indicated by the HM3 suffix), confirming validation for automotive environments including temperature cycling, high-temperature reverse bias, and ESD testing. It is specified for use in engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh electrical transients is mandatory.
What is the maximum clamping voltage of P6SMB18CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of P6SMB18CAHM3_A/I is 25.2 V at a peak pulse current (IPPM) of 23.8 A, measured with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during a standardized surge event and is critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within safe operating limits.
How does the SMB (DO-214AA) package of P6SMB18CAHM3_A/I affect thermal performance?
The SMB package of P6SMB18CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This requires careful PCB layout - undersized pads or insufficient copper area will increase junction temperature, derating peak power capability and potentially triggering thermal runaway during repetitive surges.
What is the significance of the "HM3" and "_A/I" in P6SMB18CAHM3_A/I?
The "HM3" suffix in P6SMB18CAHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification; "_A/I" specifies packaging in 13-inch tape-and-reel format (3200 units per reel). This combination ensures regulatory compliance, automotive reliability, and high-volume SMT compatibility - distinguishing it from commercial-grade (E3/M3) or smaller-reel (H) variants.
P6SMB18CAHM3_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:
- 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_A/I FAQ
1.How can I place an order for P6SMB18CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHM3_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 P6SMB18CAHM3_A/I reliable?
The price and inventory of P6SMB18CAHM3_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 P6SMB18CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHM3_A/I?
P6SMB18CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHM3_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 P6SMB18CAHM3_A/I?
For technical support, including P6SMB18CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB18CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHM3_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 P6SMB18CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHM3_A/I?
All P6SMB18CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHM3_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 P6SMB18CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB18CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHM3_A/I Tags
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