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Vishay General Semiconductor - Diodes Division SMBJ14CD-M3/H
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- Part No.:
- SMBJ14CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CD-M3/H.pdf
- Description:
- TVS DIODE 14VWM 22.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
SMBJ14CD-M3/H 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 and power lines. It features a 14 V stand-off voltage (VWM), 15.8–17.0 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), 22.9 V maximum clamping voltage (VC) at 26.2 A IPPM, and ±3.5 % VBR tolerance - deployed to protect MOSFETs and sensor signal lines in industrial motor drives.
For engineers reviewing the SMBJ14CD-M3/H datasheet, SMBJ14CD-M3/H pinout, SMBJ14CD-M3/H application, or SMBJ14CD-M3/H equivalent, key selection criteria include bidirectional clamping capability, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical reverse/forward conduction behavior due to its bidirectional architecture. It responds to transient overvoltages within picoseconds and maintains clamping performance across -55 °C to +150 °C junction temperature range.
Its thermal resistance (RθJA = 125 °C/W on minimum pad, 100 °C/W on 5 mm × 5 mm copper) and 5.0 W power dissipation at TM = 50 °C define layout-dependent derating curves. The 20 °C/W junction-to-mount thermal resistance supports thermal management when mounted on heatsinked substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 15.8 V / 17.0 V at IT = 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 22.9 V at 26.2 A - defines worst-case voltage seen by protected circuit during 10/1000 μs surge |
| PPPM | 600 W - peak transient energy absorption capacity under standardized 10/1000 μs waveform |
| ID @ VWM | <0.5 μA - ultra-low leakage preserves signal integrity and battery life in always-on interfaces |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline compatible with JEDEC MS-012AC footprint |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; safe for reflow without baking |
Pinout & Package
Two-terminal SMB (DO-214AA) package with no polarity marking - symmetric bidirectional construction eliminates cathode/anode orientation concerns during placement. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Surge current path | Identical terminals conduct equally in either direction; connects between protected line and ground or rail |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and mechanical anchoring; no thermal or electrical connection to internal die |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| ±3.5 % VBR tolerance | Reduces design margin overhead and improves consistency in multi-channel protection schemes |
| 600 W peak pulse rating | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive kickback) |
| Halogen-free, RoHS-compliant M3 suffix | Meets industrial environmental compliance requirements and JESD 201 Class 2 whisker resistance |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate driver signal lines against inductive switching spikes in 24 V DC motor control modules. IC Role / Device Role / Timing Role: TVS clamping element placed directly at MOSFET gate input to limit voltage excursion below absolute maximum rating. Use Value: Prevents gate oxide damage during 600 V+ flyback events while maintaining <0.5 μA leakage to avoid false triggering of level-shifted logic. | Use Scenario: Shielding LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional shunt clamp on differential signal pair or single-ended supply rail. Use Value: Clamps 12 V system surges to ≤22.9 V within nanoseconds, preserving signal fidelity and enabling operation down to -40 °C ambient. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced common-mode surges on data pairs. IC Role / Device Role / Timing Role: Paired SMBJ14CD-M3/H devices used in back-to-back configuration across twisted-pair lines. Use Value: Delivers symmetrical 600 W clamping per line with matched VBR to prevent skew-induced data corruption during surge events. | Use Scenario: Secondary-level overvoltage protection on VBUS and CC lines in USB-C receptacles exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Standby clamping device positioned after primary fuse and upstream of USB PD controller. Use Value: Limits VBUS excursions to 22.9 V during 10/1000 μs surges without affecting 5–20 V PD negotiation or 3 A continuous current capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA-E3/52 (Vishay) | Same VWM/VBR/PPPM specs; differs in packaging (tape-and-reel vs. bulk) and MSL rating (Level 1 vs. unspecified) | No functional difference in circuit protection; differs only in logistics and handling requirements | Select SMBJ14CD-M3/H for guaranteed halogen-free, RoHS-compliant, and whisker-resistant manufacturing traceability |
| 1.5SMC14CA (ON Semiconductor) | Same 14 V VWM and bidirectional function but in larger SMC (DO-214AB) package; 600 W rating, slightly higher VC (23.2 V) | Requires larger PCB footprint and different thermal pad layout; not drop-in compatible with SMB footprint | Choose SMBJ14CD-M3/H when board space is constrained and SMB footprint is fixed in existing designs |
Compared with SMBJ14CA-E3/52, SMBJ14CD-M3/H guarantees M3-grade whisker resistance and documented halogen-free compliance; versus 1.5SMC14CA, it saves >30 % board area while delivering identical clamping performance in space-constrained consumer and industrial modules.
Availability
SMBJ14CD-M3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply across long-lifecycle programs.
Supply support for SMBJ14CD-M3/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, TVS devices, and optoelectronics with emphasis on reliability and high-volume manufacturability.
The SMBJ series was engineered specifically for robust, automated-soldering-compatible transient suppression in harsh-environment applications including factory automation, transportation, and infrastructure equipment.
FAQ
What is the maximum clamping voltage of SMBJ14CD-M3/H at its rated peak pulse current?
The SMBJ14CD-M3/H has a maximum clamping voltage (VC) of 22.9 V at its rated peak pulse current (IPPM) of 26.2 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ14CD-M3/H consistently achieves this clamping performance across its full operating temperature range.
Is SMBJ14CD-M3/H suitable for protecting bidirectional communication lines like RS-485 or CAN FD?
Yes, SMBJ14CD-M3/H is explicitly designed for bidirectional applications, as indicated by the "CD" suffix and confirmed in Vishay's documentation. Its symmetrical breakdown behavior allows it to clamp overvoltages equally on both polarities - making it appropriate for protecting differential buses such as RS-485, CAN FD, and LIN where signal swing occurs above and below ground. Its low leakage (<0.5 μA) and fast response preserve signal integrity without loading the bus.
Does SMBJ14CD-M3/H require a heatsink for continuous operation at 1.0 W power dissipation?
No, SMBJ14CD-M3/H is rated for 1.0 W power dissipation at TA = 25 °C with no heatsink required - this rating assumes mounting on the minimum recommended PCB pad layout per Vishay's datasheet. However, sustained power dissipation near this limit demands careful thermal design: the device's RθJA is 125 °C/W on minimal pads, so ambient temperature rise must be controlled. For reliable long-term operation above 25 °C ambient, use of 5 mm × 5 mm copper pads or localized thermal relief is advised.
How does the M3 suffix affect the reliability and compliance of SMBJ14CD-M3/H?
The M3 suffix on SMBJ14CD-M3/H denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD 201 Class 2 whisker testing. This ensures long-term interconnect reliability in high-vibration or thermally cycled environments - critical for automotive and industrial deployments. Unlike non-M3 variants, SMBJ14CD-M3/H carries documented compliance to material restrictions and plating standards, simplifying regulatory certification and eliminating risk of tin whisker growth-induced short circuits.
Can SMBJ14CD-M3/H replace SMBJ14A-M3/H in an existing design without layout changes?
No - SMBJ14CD-M3/H is bidirectional while SMBJ14A-M3/H is unidirectional, meaning they differ fundamentally in electrical behavior and polarity marking. The unidirectional version has a cathode band and conducts only in reverse bias; substituting the bidirectional SMBJ14CD-M3/H would eliminate intended DC blocking and could cause unintended conduction paths. Layout remains identical (same SMB package), but circuit functionality and surge response polarity must be revalidated before replacement.
SMBJ14CD-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.8V
- Voltage - Clamping (Max) @ Ipp:
- 22.9V
- Current - Peak Pulse (10/1000µs):
- 26.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14CD-M3/H FAQ
1.How can I place an order for SMBJ14CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CD-M3/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 SMBJ14CD-M3/H reliable?
The price and inventory of SMBJ14CD-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ14CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CD-M3/H?
SMBJ14CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CD-M3/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 SMBJ14CD-M3/H?
For technical support, including SMBJ14CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CD-M3/H requirements.
6.How does Aetrix verify that SMBJ14CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14CD-M3/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 SMBJ14CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ14CD-M3/H?
All SMBJ14CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CD-M3/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 SMBJ14CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ14CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CD-M3/H Tags
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