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Vishay General Semiconductor - Diodes Division SMBJ70CD-M3/I
- Part No.:
- SMBJ70CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CD-M3/I.pdf
- Description:
- TVS DIODE 70VWM 111VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
SMBJ70CD-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 70 V stand-off voltage (VWM), 79.0–84.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤111 V at 5.4 A peak surge current - used to protect MOSFETs, sensor interfaces, and industrial I/O lines.
For engineers reviewing the SMBJ70CD-M3/I datasheet, SMBJ70CD-M3/I pinout, SMBJ70CD-M3/I application, or SMBJ70CD-M3/I equivalent, key selection criteria include bidirectional clamping capability, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both polarities, enabling robust ESD and surge suppression without polarity constraints. Its low incremental surge resistance and fast response time ensure effective protection against inductive switching spikes and lightning-induced transients.
The SMBJ70CD-M3/I is rated for 150 °C maximum junction temperature, derated above 25 °C ambient, and exhibits 125 °C/W thermal resistance (junction-to-ambient on minimum pad layout). It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 79.0 V / 84.8 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | ≤111 V at 5.4 A - clamping voltage under 600 W 10/1000 μs surge defines worst-case protected circuit stress |
| PPPM | 600 W - peak pulse power handling with standard 10/1000 μs waveform at 0.01 % duty cycle |
| ID @ VWM | ≤0.5 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | 150 °C - enables reliable operation in industrial and automotive under-hood environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and MSL Level 1 rating |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking - terminals are symmetrical and interchangeable. Case conforms to JEDEC DO-214AA outline with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when V > VBR |
| Case (cathode band absent) | Thermal and mechanical interface | No cathode band - confirms bidirectional configuration; case serves as thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise, repeatable clamping threshold across temperature and lot variance - critical for protecting narrow-voltage-margin ICs |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive load switching or lightning surges without degradation |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking - reduces manufacturing overhead |
| Halogen-free, RoHS-compliant, JESD 201 Class 2 | Meets industrial environmental compliance requirements and mitigates tin whisker risk in long-life deployments |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection applications requiring third-party safety certification |
Applications
| Industrial PLC I/O Protection | Automotive Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 24 V DC digital input modules in programmable logic controllers from relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed across input terminals to shunt transients before they reach optocoupler or MCU input pins. Use Value: Prevents false triggering and latch-up by limiting voltage to ≤111 V during 5.4 A surges - maintains system uptime in factory automation environments. | Use Scenario: Safeguarding analog output lines of engine control unit (ECU) sensors (e.g., pressure, temperature) exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) bidirectional suppressor placed at sensor harness connector to absorb coupled transients before reaching signal conditioning circuitry. Use Value: Ensures signal fidelity and prevents ADC saturation during 10/1000 μs surges - supports ASIL-B functional safety compliance without added filtering complexity. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver bus lines in networked building management systems from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Symmetrical clamping device mounted differential across A/B lines to clamp common-mode and differential-mode transients equally. Use Value: Maintains data integrity by holding differential voltage within transceiver common-mode range - eliminates communication dropouts during 600 W surge events. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motor H-bridges in smart home appliances subject to commutation spikes. IC Role / Device Role / Timing Role: Fast-response TVS placed across motor supply rails and gate drive lines to suppress inductive kickback before it couples into logic circuitry. Use Value: Extends MCU lifetime by limiting transient voltage to ≤111 V at 5.4 A - avoids permanent latch-up or ESD damage in cost-sensitive white-goods 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 |
|---|---|---|---|
| SMBJ70CA-E3/52 (Vishay) | Same VWM/VBR/PPPM specs; differs only in packaging (tape-and-reel quantity and reel diameter) | No functional difference - identical electrical and thermal performance; same SMB package and MSL rating | Select SMBJ70CD-M3/I for 13" reel delivery (3200 pcs); choose SMBJ70CA-E3/52 for alternate logistics or legacy BOM alignment |
| P6SMB70CA (Littelfuse) | Same 70 V VWM, bidirectional, 600 W PPPM, SMB package; VBR tolerance ±5 % (vs. ±3.5 % for SMBJ70CD-M3/I) | Higher VBR variance may require wider design margin; otherwise suitable for general-purpose surge suppression where tighter tolerance is not critical | Use P6SMB70CA where cost optimization is prioritized and ±5 % VBR spread is acceptable in system-level transient margin analysis |
Compared with SMBJ70CD-M3/I, SMBJ70CA-E3/52 offers identical protection performance with different packaging logistics, while P6SMB70CA provides comparable clamping but with looser VBR tolerance - making SMBJ70CD-M3/I preferable for precision-critical industrial and automotive signal line protection.
Availability
SMBJ70CD-M3/I is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive sensor signal lines, and telecom line interface protection requiring stable component supply and full traceability.
Supply support for SMBJ70CD-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 diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and infrastructure equipment where robustness and certified safety compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ70CD-M3/I at its rated peak pulse current?
The SMBJ70CD-M3/I clamps to a maximum of 111 V at its peak pulse current of 5.4 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 components remain within absolute maximum ratings.
Is SMBJ70CD-M3/I unidirectional or bidirectional, and how is polarity identified?
SMBJ70CD-M3/I is a bidirectional TVS diode, confirmed by the "CD" suffix and absence of a cathode band on the SMB package. Its symmetrical structure allows identical clamping behavior for positive and negative transients - eliminating orientation concerns during placement and simplifying PCB layout for AC-coupled or floating signal paths.
Does SMBJ70CD-M3/I meet UL safety certification requirements?
Yes, SMBJ70CD-M3/I carries Underwriters Laboratory Recognition under UL 497B (file E136766) for both unidirectional and bidirectional configurations. This certification validates its suitability for use in telecom, industrial, and building automation surge protection circuits where third-party safety compliance is mandated.
What is the maximum steady-state power dissipation of SMBJ70CD-M3/I at 25 °C ambient?
At TA = 25 °C, SMBJ70CD-M3/I has a steady-state power dissipation rating of 1.0 W. This value assumes mounting on standard PCB pads; derating applies above 25 °C per the published thermal curve - for example, at 70 °C ambient, usable power drops to approximately 0.6 W to maintain TJ ≤ 150 °C.
How does the M3 suffix affect the material composition and reliability of SMBJ70CD-M3/I?
The M3 suffix indicates SMBJ70CD-M3/I is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance. It uses matte tin-plated leads solderable per J-STD-002 and meets UL 94 V-0 flammability - making it suitable for industrial and automotive applications requiring long-term reliability and environmental compliance.
SMBJ70CD-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):
- 70V
- Voltage - Breakdown (Min):
- 79V
- Voltage - Clamping (Max) @ Ipp:
- 111V
- Current - Peak Pulse (10/1000µs):
- 5.4A
- 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)
SMBJ70CD-M3/I FAQ
1.How can I place an order for SMBJ70CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CD-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 SMBJ70CD-M3/I reliable?
The price and inventory of SMBJ70CD-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 SMBJ70CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ70CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CD-M3/I?
SMBJ70CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CD-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 SMBJ70CD-M3/I?
For technical support, including SMBJ70CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CD-M3/I requirements.
6.How does Aetrix verify that SMBJ70CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ70CD-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 SMBJ70CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ70CD-M3/I?
All SMBJ70CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CD-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 SMBJ70CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ70CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CD-M3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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