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Vishay General Semiconductor - Diodes Division SMBJ40CD-M3/I
- Part No.:
- SMBJ40CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CD-M3/I.pdf
- Description:
- TVS DIODE 40VWM 63.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:12,390
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Product details
Overview
SMBJ40CD-M3/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 40 V stand-off voltage (VWM), 45.1–48.4 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤63.6 V at 9.43 A peak surge current - used to protect MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching spikes.
For engineers reviewing the SMBJ40CD-M3/I datasheet, SMBJ40CD-M3/I pinout, SMBJ40CD-M3/I application, or SMBJ40CD-M3/I equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, M3-grade halogen-free RoHS compliance, and real-world protection use cases - all confirmed from Vishay's official 87606 document (Rev. 09-Jan-2024).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (45.1–48.4 V), VWM (40 V), and clamping voltage VC (≤63.6 V at IPPM) in either direction. Its low incremental surge resistance and fast response time enable effective suppression of transient energy without latch-up or degradation under repetitive 0.01% duty cycle surges.
The device is rated for TJ = –55 °C to +150 °C, with thermal resistance RθJA = 125 °C/W (on minimum pad) and RθJM = 20 °C/W. Power dissipation is 1.0 W at TA = 25 °C and derates linearly above that temperature per Fig. 5, supporting reliable operation in industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working margin. |
| VBR (min/max) | 45.1 V / 48.4 V at IT = 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | ≤63.6 V at 9.43 A - clamping voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 μs waveform; validates robustness vs. IEC 61000-4-5 Level 4. |
| ID @ VWM | ≤0.5 μA - ultra-low reverse leakage at stand-off voltage; minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - maximum junction temperature; supports operation in high-ambient industrial environments with appropriate PCB thermal design. |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking band; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminals 1 & 2) | Bidirectional surge path | Identical conduction in both directions; connects across protected line and ground (or between differential lines) without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise, repeatable clamping threshold across manufacturing batches - critical for margin-critical protection schemes. |
| 600 W PPPM (10/1000 μs) | Validated surge immunity for industrial-level transients including lightning-induced surges and relay coil flyback. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-related popcorning - eliminates pre-bake requirement. |
| M3 suffix compliance | Halogens-free, RoHS-compliant, and JESD 201 Class 2 whisker-resistant - meets industrial reliability and environmental mandates. |
| Low ID (≤0.5 μA @ VWM) | Reduces quiescent current draw in always-on sensor or communication circuits - extends battery life and avoids false triggers. |
Applications
| Industrial Motor Control I/O Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting PLC digital input modules from inductive kickback when controlling solenoids or contactors. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminal and common rail to clamp both positive and negative transients. Use Value: Prevents damage to optocouplers and microcontroller GPIOs by limiting transient voltage to ≤63.6 V while maintaining 40 V system operating margin. |
Use Scenario: Shielding CAN or LIN bus signal pairs in engine bay sensors exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Differential or common-mode TVS connected between signal lines and chassis ground to suppress coupled noise. Use Value: Maintains signal integrity under 10/1000 μs surges up to 600 W without affecting 1 Mbps CAN timing or introducing capacitive loading >100 pF. |
| Telecom Ethernet Port Surge Protection | Consumer Appliance Power Supply Input Clamping |
Use Scenario: Secondary-level transient suppression on PoE-enabled Ethernet ports after primary gas discharge tube (GDT) stage. IC Role / Device Role / Timing Role: Fast-response TVS in parallel with data lines to absorb residual energy missed by upstream GDT. Use Value: Clamps induced surges to <65 V within nanoseconds, preserving PHY IC integrity and meeting IEEE 802.3bt surge test requirements. |
Use Scenario: Input-side protection on AC-DC adapters for smart home devices subjected to mains-borne transients. IC Role / Device Role / Timing Role: Bidirectional TVS across bridge rectifier output to suppress ringing and line-to-line surges. Use Value: Withstands repeated 600 W surges while adding <0.5 μA leakage - avoids efficiency loss and thermal drift in compact enclosed designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-E3/52 (Vishay) | Same VWM/VBR/PPPM specs but non-M3 grade; halogen content not controlled, no JESD 201 Class 2 whisker rating. | Acceptable for commercial-grade products where RoHS/halogen-free compliance is not mandated. | Select SMBJ40CD-M3/I when industrial lifecycle, traceability, or automotive-qualified supply chain is required. |
| 1.5SMC40CA (ON Semiconductor) | Same SMB package and 40 V bidirectional rating, but 1.5 kW peak power (10/1000 μs); higher VC (64.5 V) and wider VBR tolerance (±5 %). | Better suited for higher-energy surge environments (e.g., outdoor telecom), but less precise clamping margin. | Choose SMBJ40CD-M3/I when tighter VBR control, lower leakage (<0.5 μA), and M3 reliability are prioritized over raw power headroom. |
Compared with SMBJ40CA-E3/52 and 1.5SMC40CA, SMBJ40CD-M3/I delivers superior process control (±3.5 % VBR), guaranteed halogen-free composition, and validated whisker resistance - making it optimal for long-lifecycle industrial and automotive-qualified designs where parameter consistency and material compliance are non-negotiable.
Availability
SMBJ40CD-M3/I is available at Aetrix Electronics and suitable for industrial motor control I/O protection, automotive sensor interface hardening, and telecom Ethernet port surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ40CD-M3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The SMBJ series was engineered specifically for robust, surface-mount transient suppression in space-constrained, high-surge environments - balancing precision clamping, low leakage, and automated assembly compatibility.
FAQ
What is the exact breakdown voltage range for SMBJ40CD-M3/I?
The SMBJ40CD-M3/I has a specified breakdown voltage (VBR) range of 45.1 V to 48.4 V at 1 mA test current, per Vishay document 87606 (Rev. 09-Jan-2024). This ±3.5 % tolerance is tighter than standard TVS diodes and ensures consistent clamping performance across production units. The value applies identically in both directions due to its bidirectional construction.
Is SMBJ40CD-M3/I unidirectional or bidirectional?
SMBJ40CD-M3/I is a bidirectional TVS diode, indicated by the "CD" suffix per Vishay's naming convention. It provides symmetrical clamping behavior - identical VBR, VWM, and VC characteristics in both polarities - with no cathode band marking on the SMB package. This makes it ideal for protecting AC lines, differential signals, or any application where voltage transients may swing positive or negative relative to ground.
What does the "M3" suffix mean in SMBJ40CD-M3/I?
The "M3" suffix in SMBJ40CD-M3/I denotes Vishay's industrial-grade qualification: halogen-free molding compound, RoHS compliance, and passing JESD 201 Class 2 whisker testing. It also confirms compliance with MSL Level 1 (260 °C peak reflow), eliminating the need for moisture-sensitive pre-bake. These attributes make SMBJ40CD-M3/I suitable for high-reliability, long-lifecycle applications where material purity and assembly robustness are critical.
What is the maximum clamping voltage for SMBJ40CD-M3/I under surge conditions?
The maximum clamping voltage (VC) for SMBJ40CD-M3/I is 63.6 V at its rated peak pulse current (IPPM) of 9.43 A, measured using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during a worst-case transient event - a key parameter for ensuring downstream ICs remain within their absolute maximum ratings.
Can SMBJ40CD-M3/I be used in place of a unidirectional TVS like SMBJ40D-M3/I?
No - SMBJ40CD-M3/I is bidirectional and lacks polarity marking, while SMBJ40D-M3/I is unidirectional with a cathode band. Substituting one for the other risks improper clamping: a unidirectional part would fail to suppress negative transients, and a bidirectional part could conduct undesirably in DC-biased circuits. Always match the device type (D = unidirectional, CD = bidirectional) to the circuit's voltage polarity requirements and transient profile.
SMBJ40CD-M3/I 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):
- 40V
- Voltage - Breakdown (Min):
- 45.1V
- Voltage - Clamping (Max) @ Ipp:
- 63.6V
- Current - Peak Pulse (10/1000µs):
- 9.43A
- 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)
SMBJ40CD-M3/I FAQ
1.How can I place an order for SMBJ40CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CD-M3/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 SMBJ40CD-M3/I reliable?
The price and inventory of SMBJ40CD-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ40CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CD-M3/I?
SMBJ40CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CD-M3/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 SMBJ40CD-M3/I?
For technical support, including SMBJ40CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CD-M3/I requirements.
6.How does Aetrix verify that SMBJ40CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ40CD-M3/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 SMBJ40CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ40CD-M3/I?
All SMBJ40CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CD-M3/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 SMBJ40CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ40CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40CD-M3/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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