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Vishay General Semiconductor - Diodes Division SMBJ8.5CD-M3/I
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- Part No.:
- SMBJ8.5CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5CD-M3/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,722
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Product details
Overview
SMBJ8.5CD-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 8.5 V stand-off voltage (VWM), 9.57–10.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤14.3 V at 15 A peak surge current - used in protecting sensor interfaces and microcontroller I/O in industrial control systems.
For engineers reviewing the SMBJ8.5CD-M3/I datasheet, SMBJ8.5CD-M3/I pinout, SMBJ8.5CD-M3/I application, or SMBJ8.5CD-M3/I equivalent, key selection criteria include bidirectional polarity, ±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 behavior in both directions, enabling suppression of positive and negative transients without polarity constraints. Its low incremental surge resistance and fast response time ensure effective protection against ESD, lightning-induced surges, and inductive switching spikes.
Designed for surface-mount assembly on standard PCB pad layouts, it delivers 600 W peak pulse power handling with thermal resistance RθJA = 125 °C/W (on minimum recommended pad) and supports continuous power dissipation up to 1.0 W at 25 °C ambient or 5.0 W at 50 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum reverse working voltage before clamping begins; sets operating margin for protected circuitry |
| VBR min/max | 9.57 V / 10.3 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | ≤14.3 V at 15 A - clamping voltage limits stress on downstream ICs during transient events |
| PPPM | 600 W (10/1000 μs waveform) - defines surge energy absorption capability under standardized test conditions |
| ID @ VWM | ≤0.5 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| Package | SMB (DO-214AA) - industry-standard SMD outline with 2.20 mm height and 5.59 mm length for automated placement |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for reflow without dry pack or baking |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking required. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Mounting pad layout per Vishay specification: 0.086" × 0.085" (2.18 mm × 2.16 mm) minimum copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds VBR in either polarity |
| Case | Thermal and mechanical interface | Plastic body provides electrical isolation; thermal path to PCB via soldered terminals and pad copper |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise overvoltage threshold setting without design margin inflation |
| 600 W peak pulse power | Handles high-energy transients common in industrial motor drives and telecom line interfaces |
| Low ID ≤0.5 μA at VWM | Minimizes standby current draw in battery-powered sensor nodes and IoT edge devices |
| Halogen-free, RoHS-compliant M3 suffix | Meets industrial environmental compliance requirements and JESD 201 Class 2 whisker resistance |
| MSL Level 1 rating | Eliminates pre-reflow baking steps and simplifies manufacturing logistics |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
Use Scenario: Protecting analog and digital I/O lines of pressure, temperature, and position sensors in PLCs and factory automation controllers. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and MCU input to limit transient voltage excursions. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers during 4–20 mA loop faults or nearby relay switching. | Use Scenario: Safeguarding LIN bus and discrete switch inputs in automotive BCMs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary TVS on low-speed communication and control lines where polarity reversal may occur. Use Value: Maintains signal fidelity while absorbing 10/1000 μs surges up to 600 W without degradation over 10⁵+ events. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Feedback |
Use Scenario: Front-end protection for Ethernet PHYs, DSL line drivers, and POTS interfaces in network access equipment. IC Role / Device Role / Timing Role: First-stage transient suppressor before secondary filtering and conditioning circuits. Use Value: Clamps induced lightning surges to <14.3 V within nanoseconds, preserving signal integrity and meeting ITU-T K.20/21 immunity standards. | Use Scenario: Shielding Hall-effect sensor outputs and encoder feedback lines in washing machine and HVAC blower motor control boards. IC Role / Device Role / Timing Role: Localized transient clamp adjacent to motor driver ICs and sensing components. Use Value: Withstands repetitive inductive kickback from brushed DC motors without parameter drift or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA-E3/52 (Vishay) | Same VWM/VBR/PPPM specs; differs in packaging (tape-and-reel quantity: 5000 pcs vs. 3200 pcs) and M3 vs. E3 suffix compliance grading | E3 suffix meets JEDEC J-STD-020 MSL Level 1 but lacks JESD 201 Class 2 whisker test certification | Select SMBJ8.5CD-M3/I for industrial environments requiring enhanced metallurgical reliability under thermal cycling |
| P6SMB8.5CA (Littelfuse) | Identical VWM (8.5 V), VBR (9.5–10.3 V), and PPPM (600 W); slightly higher VC (14.4 V) and ID (1.0 μA) | Same SMB package and bidirectional function; approved for UL 497B but not certified to same Vishay material categorization | Choose P6SMB8.5CA only if existing BOM uses Littelfuse qualification and supply chain is locked to that vendor |
Compared with SMBJ8.5CA-E3/52 and P6SMB8.5CA, the SMBJ8.5CD-M3/I offers tighter process control (±3.5 % VBR), lower leakage (≤0.5 μA), and verified whisker resistance - critical for long-lifecycle industrial deployments where field failure root cause must exclude metallurgical degradation.
Availability
SMBJ8.5CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom line card designs requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for SMBJ8.5CD-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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in harsh electromagnetic environments across industrial, automotive, and communications infrastructure.
FAQ
What is the exact breakdown voltage range for SMBJ8.5CD-M3/I?
The SMBJ8.5CD-M3/I has a guaranteed breakdown voltage (VBR) range of 9.57 V to 10.3 V at 1 mA test current, corresponding to ±3.5 % tolerance around the nominal 9.935 V midpoint. This tight specification is confirmed in Vishay document 87606, Table on page 2, row for SMBJ8.5CD. The value is measured under standard conditions and applies equally in both directions due to its bidirectional construction.
Is SMBJ8.5CD-M3/I unidirectional or bidirectional?
SMBJ8.5CD-M3/I is a bidirectional TVS diode, as indicated by the "CD" suffix per Vishay's naming convention. Unlike unidirectional variants (e.g., SMBJ8.5D), it has no cathode band and provides symmetrical clamping for both positive and negative transients. This makes it ideal for AC-coupled lines, differential buses, or any application where polarity reversal cannot be guaranteed.
What does the "M3" suffix signify in SMBJ8.5CD-M3/I?
The "M3" suffix in SMBJ8.5CD-M3/I denotes halogen-free, RoHS-compliant construction, industrial-grade qualification, and compliance with JESD 201 Class 2 whisker testing. It also indicates tape-and-reel packaging on a 13-inch reel with 3200 units per reel. These attributes are defined in Vishay's ordering information table on page 3 of document 87606.
Can SMBJ8.5CD-M3/I replace SMBJ8.5CA in an existing design?
Yes, SMBJ8.5CD-M3/I can replace SMBJ8.5CA in most cases, as both share identical VWM (8.5 V), VBR (9.57–10.3 V), PPPM (600 W), and SMB package. However, SMBJ8.5CD-M3/I offers tighter VBR tolerance (±3.5 % vs. typical ±5 % for CA variants) and lower leakage (≤0.5 μA vs. ≤1.0 μA), improving consistency in precision-sensitive applications.
What is the maximum clamping voltage of SMBJ8.5CD-M3/I at rated surge current?
The maximum clamping voltage (VC) of SMBJ8.5CD-M3/I is 14.3 V at 15 A peak pulse current (IPPM), tested with a 10/1000 μs waveform per ANSI/IEEE C62.35. This value is specified in the Electrical Characteristics table on page 2 of Vishay document 87606 and represents the upper bound of voltage seen by protected circuitry during worst-case surge events.
SMBJ8.5CD-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.57V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 42.2A
- 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)
SMBJ8.5CD-M3/I FAQ
1.How can I place an order for SMBJ8.5CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5CD-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 SMBJ8.5CD-M3/I reliable?
The price and inventory of SMBJ8.5CD-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 SMBJ8.5CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.5CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5CD-M3/I?
SMBJ8.5CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5CD-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 SMBJ8.5CD-M3/I?
For technical support, including SMBJ8.5CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5CD-M3/I requirements.
6.How does Aetrix verify that SMBJ8.5CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5CD-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 SMBJ8.5CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.5CD-M3/I?
All SMBJ8.5CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5CD-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 SMBJ8.5CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ8.5CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5CD-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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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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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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