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Vishay General Semiconductor - Diodes Division SMBJ70CD-M3/H
- Part No.:
- SMBJ70CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CD-M3/H.pdf
- Description:
- TVS DIODE 70VWM 111VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,637
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Product details
Overview
SMBJ70CD-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 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 surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ70CD-M3/H datasheet, SMBJ70CD-M3/H pinout, SMBJ70CD-M3/H application, or SMBJ70CD-M3/H 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 bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its silicon avalanche structure enables sub-nanosecond response to transients, and it maintains stable clamping performance up to 150 °C junction temperature.
The device uses a planar passivated junction and is rated for repetitive surge duty cycle of 0.01 % under 10/1000 μs waveform. Thermal resistance is 125 °C/W (junction-to-ambient, mounted on minimum pad layout) and 20 °C/W (junction-to-mount), supporting reliable operation in compact PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse stand-off voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR min/max | 79.0 V / 84.8 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | ≤111 V at 5.4 A - clamping voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges when properly laid out. |
| ID @ VWM | ≤0.5 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length; supports automated placement and reflow. |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; can be stored indefinitely before reflow without baking. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode band marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output; bidirectional clamping allows placement without polarity orientation constraints. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides thermal path to PCB copper; requires minimum 5.0 mm × 5.0 mm copper pad for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns. |
| ±3.5 % VBR tolerance | Reduces design margin uncertainty and simplifies system-level surge compliance testing across temperature and lot variation. |
| 600 W peak pulse rating | Meets IEC 61000-4-5 (10/1000 μs) surge immunity requirements for industrial and telecom equipment up to Level 4. |
| Halogen-free, RoHS, M3 grade | Complies with IPC-J-STD-020 MSL Level 1, JESD 201 Class 2 whisker resistance, and environmental regulations for industrial-grade deployment. |
| Low leakage (≤0.5 μA) | Preserves accuracy in high-impedance analog sensing paths and avoids false triggering in battery-powered edge devices. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O lines of pressure, temperature, and flow sensors in factory automation cabinets exposed to relay coil kickback and EFT. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly at connector entry point to shunt induced transients before reaching precision ADC or microcontroller GPIO. Use Value: Prevents latch-up or permanent damage to sensor signal conditioning ICs while maintaining <0.5 μA leakage to avoid offset errors in 16-bit measurement systems. |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs in outdoor base stations and DSLAMs subjected to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional transient suppressor bridging differential pairs (A/B) or between line and ground to clamp common-mode and differential-mode transients. Use Value: Ensures >100,000 surge cycles without degradation due to low incremental surge resistance and stable clamping at ≤111 V. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Shielding LIN bus transceivers and window lift motor drivers from load dump and ISO 7637-2 Pulse 1/2a/3a transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Secondary-level TVS located downstream of primary fuses and upstream of transceiver ICs to absorb residual energy after bulk suppression. Use Value: Operates reliably from −55 °C to +150 °C junction temperature, meeting AEC-Q200 stress test requirements for under-hood environments. |
Use Scenario: Protecting microcontroller GPIOs and optocoupler inputs controlling BLDC fan or compressor inverters in HVAC and washing machines. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) TVS placed at board edge to suppress commutation spikes from brushed motors and triac switching noise. Use Value: Halogen-free M3 construction ensures long-term reliability in sealed, thermally constrained enclosures without whisker-induced short failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-E3/52 (Vishay) | Same VWM/VBR/PPPM specs, but M3/H suffix replaced by -E3/52 - different tape/reel packaging and JEDEC-compliant MSL Level 1 marking. | No functional difference; intended for same PCB layout and electrical use cases. | Select SMBJ70CD-M3/H for traceable industrial-grade sourcing with JESD 201 Class 2 whisker qualification; choose SMBJ70CA-E3/52 for standard distribution channels. |
| 1.5SMC70CA (ON Semiconductor) | Same SMB package and bidirectional 70 V rating, but wider VBR tolerance (±5 %), higher ID (≤1.0 μA), and lower PPPM (1500 W derated to 600 W at 10/1000 μs). | Valid for general-purpose surge suppression but lacks the tight VBR control needed in precision analog front-ends. | Prefer SMBJ70CD-M3/H where ±3.5 % VBR tolerance, <0.5 μA leakage, and guaranteed M3 process consistency are required for industrial certification. |
Compared with SMBJ70CA-E3/52, SMBJ70CD-M3/H offers identical electrical performance with enhanced process traceability and whisker resistance; versus 1.5SMC70CA, it delivers tighter VBR control and lower leakage critical for high-accuracy sensor and telecom applications.
Availability
SMBJ70CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply, long-lifecycle support, and certified halogen-free manufacturing.
Supply support for SMBJ70CD-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and industrial-grade qualification.
The SMBJ series was developed specifically for high-reliability transient suppression in harsh environments - targeting applications demanding tight parametric control, low leakage, and robust surge endurance across extended temperature ranges.
FAQ
What is the clamping voltage of SMBJ70CD-M3/H at its rated peak pulse current?
The SMBJ70CD-M3/H clamps to a maximum of 111 V when subjected to 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. The SMBJ70CD-M3/H achieves this clamping performance while maintaining low incremental surge resistance, ensuring consistent protection across repeated transients.
Is SMBJ70CD-M3/H suitable for bidirectional signal lines like RS-485 or CAN FD?
Yes, SMBJ70CD-M3/H is explicitly designed for bidirectional applications, as indicated by the "CD" suffix and confirmed in Vishay's documentation. Its symmetrical breakdown behavior ensures identical clamping in both polarities, making it appropriate for differential bus protection such as RS-485, CAN, and other AC-coupled or floating interfaces. No polarity orientation is required during placement, simplifying layout and reducing assembly error risk.
Does SMBJ70CD-M3/H meet automotive qualification standards like AEC-Q200?
SMBJ70CD-M3/H is not AEC-Q200 qualified; it is specified for industrial-grade operation with a junction temperature range of −55 °C to +150 °C and meets JESD 201 Class 2 whisker resistance. While it operates reliably across that full range and is used in automotive body electronics, formal AEC-Q200 stress testing and certification are not claimed in the Vishay datasheet (87606, Rev. 09-Jan-2024). For AEC-Q200–mandated designs, consult Vishay's automotive-specific TVS portfolio.
What is the meaning of the "M3/H" suffix in SMBJ70CD-M3/H?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads qualified to JESD 201 Class 2 for whisker resistance, while "H" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This combination ensures industrial-grade reliability, environmental compliance, and compatibility with high-speed SMT assembly lines - distinguishing it from non-M3 variants and alternate reel formats (e.g., "I" for 13″ reels).
How does SMBJ70CD-M3/H compare to unidirectional SMBJ70D-M3/H in circuit implementation?
SMBJ70CD-M3/H replaces two unidirectional devices in differential or AC-coupled paths, eliminating polarity dependency and reducing component count. Unlike SMBJ70D-M3/H - which has a cathode band and conducts only in reverse - SMBJ70CD-M3/H clamps equally in both directions, enabling direct placement across lines without orientation checks. Its leakage (<0.5 μA) and VBR tolerance (±3.5 %) match the unidirectional version, preserving design margins while simplifying layout and BOM management.
SMBJ70CD-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):
- 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/H FAQ
1.How can I place an order for SMBJ70CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CD-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 SMBJ70CD-M3/H reliable?
The price and inventory of SMBJ70CD-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 SMBJ70CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ70CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CD-M3/H?
SMBJ70CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CD-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 SMBJ70CD-M3/H?
For technical support, including SMBJ70CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CD-M3/H requirements.
6.How does Aetrix verify that SMBJ70CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70CD-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 SMBJ70CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ70CD-M3/H?
All SMBJ70CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CD-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 SMBJ70CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ70CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CD-M3/H Tags
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Diodes Incorporated
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