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Vishay General Semiconductor - Diodes Division P6SMB18CAHM3/I
- Part No.:
- P6SMB18CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHM3/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,684
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Product details
Overview
P6SMB18CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, 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, 25.2 V maximum clamping voltage (VC) at 23.8 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the P6SMB18CAHM3/I datasheet, P6SMB18CAHM3/I pinout, P6SMB18CAHM3/I application, or P6SMB18CAHM3/I equivalent, key selection criteria include bidirectional transient suppression capability, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.44), and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
The P6SMB18CAHM3/I operates as a voltage-clamping device that remains high-impedance below its 15.3 V stand-off voltage and rapidly transitions to low-impedance conduction above its 17.1–18.9 V breakdown threshold. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform under repetitive 0.01% duty cycle conditions, with thermal resistance of 100 °C/W junction-to-ambient and 20 °C/W junction-to-lead. The device is glass passivated, meets MSL Level 1 per J-STD-020, and supports peak surge currents up to 23.8 A while maintaining clamping below 25.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.3 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on margin |
| VC @ IPPM | 25.2 V at 23.8 A - Clamped voltage during worst-case 10/1000 μs transient, defining protected circuit stress |
| PPPM | 600 W - Peak transient energy absorption capacity per standardized waveform |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling and humidity testing |
| Compliance | Halogen-free, RoHS-compliant - Meets environmental requirements for industrial and automotive production |
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), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional clamping | Connected to line being protected; forms symmetrical clamping path with cathode |
| Cathode | Current exit terminal in forward bias; common node in bidirectional clamping | Connected to line being protected; forms symmetrical clamping path with anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, or ungrounded lines without polarity dependency |
| 600 W peak pulse power | Handles IEC 61000-4-5 surge events up to 4 kV (line-earth) with margin |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot during transients, reducing stress on downstream ICs like microcontrollers or sensors |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed across sensor signal and ground, responding within <1 ns to transients. Use Value: Maintains signal integrity by limiting voltage excursions to ≤25.2 V during 10/1000 μs surges, preventing ADC saturation or op-amp latch-up in sensor signal conditioning circuits. | Use Scenario: Safeguarding CAN_H and CAN_L lines in factory automation nodes subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) providing symmetric clamping referenced to common ground. Use Value: Ensures CAN transceiver survival under ±25 kV contact ESD (IEC 61000-4-2) and 40 A 10/1000 μs surges (IEC 61000-4-5), preserving bus communication integrity. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Shielding USB 2.0 D+ and D− lines in set-top boxes against human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between data lines and chassis ground. Use Value: Limits transient voltage to ≤25.2 V with sub-nanosecond response, preventing damage to USB PHY without degrading 480 Mbps signal integrity. | Use Scenario: Front-end protection of ADSL/VDSL line interface circuits exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary clamping device across line-to-line and line-to-ground, coordinated with gas discharge tubes. Use Value: Absorbs up to 600 W of surge energy while clamping differential mode transients to <50.4 V (2 × VC), enabling robust overvoltage immunity per ITU-T K.20/K.21. |
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 | 400 W PPPM rating, SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump | Select when board space is constrained and peak surge energy does not exceed 400 W |
| 1.5KE18CA | Through-hole DO-201 package, same 600 W rating but larger size and manual assembly requirement | Used where legacy through-hole design or higher thermal mass is preferred | Select for prototyping, repair, or mixed-technology boards requiring axial leaded components |
Compared with SMAJ18CA and 1.5KE18CA, the P6SMB18CAHM3/I offers superior SMT manufacturability, AEC-Q101 qualification, and optimized thermal performance in SMB footprint-making it the preferred choice for high-volume automotive and industrial surface-mount designs requiring validated reliability.
Availability
P6SMB18CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and telecom DSL line surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P6SMB18CAHM3/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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series is engineered for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What is the clamping voltage of P6SMB18CAHM3/I under a 10/1000 μs surge?
The P6SMB18CAHM3/I has a maximum clamping voltage (VC) of 25.2 V when subjected to its rated peak pulse current of 23.8 A with a 10/1000 μs waveform. This value is measured per standard test conditions defined in the Vishay datasheet and represents the upper limit of voltage seen by protected circuitry during such a transient event. The P6SMB18CAHM3/I maintains this clamping performance consistently across its operating temperature range.
Is P6SMB18CAHM3/I suitable for automotive applications?
Yes, P6SMB18CAHM3/I is AEC-Q101 qualified and designated with the HM3 suffix indicating halogen-free, RoHS-compliant construction and automotive-grade reliability. It is specifically intended for use in engine control units, body electronics, infotainment systems, and ADAS sensor interfaces where immunity to load dump, jump start, and ISO 7637-2 transients is required. The P6SMB18CAHM3/I undergoes rigorous stress testing per AEC-Q101 standards.
What does the "CA" suffix mean in P6SMB18CAHM3/I?
The "CA" suffix in P6SMB18CAHM3/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities-ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or ungrounded lines. Unlike unidirectional variants (e.g., P6SMB18AHM3/I), the P6SMB18CAHM3/I has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals.
What is the thermal resistance of P6SMB18CAHM3/I?
The P6SMB18CAHM3/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, and a junction-to-lead thermal resistance (RθJL) of 20 °C/W. These values define its ability to dissipate power under transient conditions and inform PCB layout decisions-larger copper areas reduce effective RθJA and improve surge survivability. The P6SMB18CAHM3/I's thermal performance is validated per JEDEC standards.
How does P6SMB18CAHM3/I compare to unidirectional P6SMB18AHM3/I in circuit design?
The P6SMB18CAHM3/I is bidirectional and used where voltage transients may occur with either polarity-such as across differential signal pairs or AC lines-while the unidirectional P6SMB18AHM3/I is placed with cathode toward the protected side and requires correct polarity orientation. The P6SMB18CAHM3/I eliminates polarity concerns but exhibits identical VWM (15.3 V), VBR (17.1–18.9 V), and VC (25.2 V) ratings in both directions, making it more flexible for layout and safer in uncertain grounding scenarios.
P6SMB18CAHM3/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:
- 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:
- 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/I FAQ
1.How can I place an order for P6SMB18CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHM3/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/I reliable?
The price and inventory of P6SMB18CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHM3/I?
P6SMB18CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHM3/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/I?
For technical support, including P6SMB18CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHM3/I requirements.
6.How does Aetrix verify that P6SMB18CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHM3/I?
All P6SMB18CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHM3/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/I part is unused and in its original packaging.
Return procedure for P6SMB18CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHM3/I Tags
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