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Vishay General Semiconductor - Diodes Division SMBJ8.0CD-M3/I
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- Part No.:
- SMBJ8.0CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CD-M3/I.pdf
- Description:
- TVS DIODE 8VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,775
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Product details
Overview
SMBJ8.0CD-M3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 8.0 V stand-off voltage (VWM), 9.03–9.69 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamping voltage of 13.4 V at 35 A peak surge current - used for protecting signal lines and power rails in industrial sensor interfaces and telecom front-ends.
For engineers reviewing the SMBJ8.0CD-M3/I datasheet, SMBJ8.0CD-M3/I pinout, SMBJ8.0CD-M3/I application, or SMBJ8.0CD-M3/I equivalent, this page delivers verified electrical parameters, bidirectional polarity behavior, thermal derating curves, M3 halogen-free RoHS-compliant construction, and real-world clamping performance under standardized surge waveforms.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its 13.4 V clamping voltage at 35 A IPPM ensures robust overvoltage suppression while maintaining low incremental surge resistance and fast sub-nanosecond response time.
The device complies with ANSI/IEEE C62.35 surge standards and meets UL 497B recognition (QVGQ2) for protector classification. It is rated for -55 °C to +150 °C junction temperature, with thermal resistance RθJA = 125 °C/W on minimum pad layout and RθJM = 20 °C/W to mounting surface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum reverse stand-off voltage before significant leakage; defines safe operating range for protected circuitry |
| VBR min/max | 9.03 V / 9.69 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 13.4 V at 35 A - clamping voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity |
| ID @ VWM | 500 μA max - low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables operation in high-temperature industrial environments without derating penalties |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no cathode band marking - terminals are symmetrical and interchangeable. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements. Halogen-free, RoHS-compliant, industrial-grade construction (M3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional clamping occurs regardless of voltage polarity applied |
| Case (cathode band absent) | Thermal and mechanical interface | No polarity marking; device mounts identically in either orientation - simplifies PCB layout and automated placement |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise, repeatable clamping thresholds across manufacturing batches - critical for compliance with IEC 61000-4-5 margin requirements |
| 600 W peak pulse power | Supports full Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge testing per IEC 61000-4-5 without degradation |
| Low 500 μA ID @ VWM | Minimizes loading on high-impedance sensor outputs and analog front-ends, preserving signal fidelity and accuracy |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C - compatible with standard lead-free assembly processes without baking |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial equipment requiring certified surge protection components |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting RS-485 transceivers and analog sensor inputs (e.g., 4–20 mA loops) against ESD and inductive switching transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional transient clamp placed directly at connector entry point to shunt surge energy before reaching sensitive analog front-end or communication IC. Use Value: Clamps 35 A surges to ≤13.4 V, preventing latch-up or permanent damage to transceivers rated for <16 V absolute maximum ratings. | Use Scenario: Safeguarding Ethernet PHYs and DSL line drivers against lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Primary-level TVS deployed in differential pair configuration across tip/ring or TX+/TX− lines to suppress common-mode and differential-mode transients. Use Value: Symmetrical 8.0 V VWM and matched VBR ensure balanced clamping on both signal polarities - essential for preserving signal integrity in full-duplex data links. |
| Consumer Audio Input Protection | Automotive Body Control Module |
Use Scenario: Shielding line-in and microphone inputs of smart speakers and audio receivers from user-handling ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed immediately after input jack to limit voltage excursion before op-amp or ADC input stage. Use Value: 500 μA max leakage avoids DC offset errors; 13.4 V VC prevents clipping or saturation of audio signal chain during 8 kV contact ESD events. | Use Scenario: Protecting LIN bus transceivers and switch inputs in door modules and seat control units from load dump and battery reversal transients. IC Role / Device Role / Timing Role: Secondary-level TVS on low-speed control lines where unidirectional devices are unsuitable due to bidirectional signaling or floating ground references. Use Value: Bidirectional operation eliminates need for dual unidirectional devices; SMB footprint saves board space in space-constrained automotive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Same VWM (8.0 V), same SMB package, but ±5 % VBR tolerance (vs. ±3.5 % for SMBJ8.0CD-M3/I) and non-M3 construction | Lacks M3 halogen-free/RoHS/whisker-resistant qualification; not rated for industrial temperature cycling or long-term reliability in harsh environments | Select when cost sensitivity outweighs tight VBR tolerance and industrial-grade process requirements |
| P6SMB8.0CA | Identical electrical specs (VWM = 8.0 V, VC = 13.4 V), same SMB package, but legacy Vishay part number with older revision control and no M3 suffix | No UL 497B recognition or JESD 201 Class 2 whisker test certification; limited traceability and lifecycle support | Acceptable for legacy redesigns where documentation and supply continuity are assured, but not recommended for new designs |
Compared with SMBJ8.0CA-E3/52 and P6SMB8.0CA, SMBJ8.0CD-M3/I provides tighter VBR tolerance, M3-compliant materials, UL 497B listing, and guaranteed industrial-grade reliability - making it the preferred choice for new industrial, telecom, and automotive applications demanding long-term supply stability and regulatory compliance.
Availability
SMBJ8.0CD-M3/I 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 assurance, and certified surge immunity.
Supply support for SMBJ8.0CD-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in space-constrained, high-surge environments - targeting industrial automation, telecom infrastructure, and automotive electronics where consistent clamping and long-term stability are mandatory.
FAQ
What does the "CD" suffix indicate in SMBJ8.0CD-M3/I?
The "CD" suffix in SMBJ8.0CD-M3/I denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMBJ8.0D), this device clamps voltage surges equally in both polarities - essential for protecting AC-coupled signals, differential buses, or circuits with undefined ground reference. No cathode band is present on the SMB package.
Is SMBJ8.0CD-M3/I compliant with RoHS and halogen-free standards?
Yes, SMBJ8.0CD-M3/I carries the M3 suffix, which certifies halogen-free construction, RoHS compliance, and industrial-grade qualification. It meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability requirements - confirmed in Vishay document 87606, revision 09-Jan-2024.
What is the maximum clamping voltage of SMBJ8.0CD-M3/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ8.0CD-M3/I is 13.4 V at 35 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMBJ8.0CD-M3/I replace unidirectional TVS diodes in existing designs?
SMBJ8.0CD-M3/I can replace unidirectional TVS diodes only if the circuit requires bidirectional protection - for example, in differential signal paths or AC-coupled interfaces. Its symmetrical behavior eliminates polarity concerns but may increase leakage slightly versus unidirectional equivalents; verify compatibility with downstream IC absolute maximum ratings before substitution.
What is the thermal resistance of SMBJ8.0CD-M3/I on standard PCB layout?
SMBJ8.0CD-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. On a 5.0 mm × 5.0 mm copper pad, RθJA improves to 100 °C/W - critical for calculating safe power dissipation in continuous or repetitive surge scenarios.
SMBJ8.0CD-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):
- 8V
- Voltage - Breakdown (Min):
- 9.03V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 44.8A
- 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)
SMBJ8.0CD-M3/I FAQ
1.How can I place an order for SMBJ8.0CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CD-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 SMBJ8.0CD-M3/I reliable?
The price and inventory of SMBJ8.0CD-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 SMBJ8.0CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CD-M3/I?
SMBJ8.0CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CD-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 SMBJ8.0CD-M3/I?
For technical support, including SMBJ8.0CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CD-M3/I requirements.
6.How does Aetrix verify that SMBJ8.0CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CD-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 SMBJ8.0CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CD-M3/I?
All SMBJ8.0CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CD-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 SMBJ8.0CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ8.0CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CD-M3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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