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Vishay General Semiconductor - Diodes Division SMBJ85CD-M3/H
- Part No.:
- SMBJ85CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ85CD-M3/H.pdf
- Description:
- TVS DIODE 85VWM 135VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,666
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Product details
Overview
SMBJ85CD-M3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 85 V stand-off voltage (VWM), 95.7–103 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 135 V at 4.46 A, and ±3.5 % VBR tolerance - deployed in industrial sensor signal lines and telecom interface protection.
For engineers reviewing the SMBJ85CD-M3/H datasheet, SMBJ85CD-M3/H pinout, SMBJ85CD-M3/H application, or SMBJ85CD-M3/H equivalent, key selection criteria include bidirectional clamping capability, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling protection against voltage transients induced by inductive load switching or lightning surges without polarity constraints. Its low incremental surge resistance and fast response time ensure effective clamping during sub-microsecond transients while maintaining stable VWM under normal operation.
The device is rated for 150 °C maximum junction temperature and exhibits thermal resistance of 125 °C/W (junction-to-ambient, mounted on minimum recommended pad layout). Power derating begins above 25 °C ambient, with 5.0 W dissipation capability at case temperature TM = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum reverse stand-off voltage before conduction; defines safe operating range for protected circuit |
| VBR min/max | 95.7 V / 103 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on behavior across production lots |
| VC at IPPM | 135 V at 4.46 A - clamping voltage limits transient energy delivered to downstream components |
| PPPM | 600 W (10/1000 μs waveform) - peak surge handling capacity for repetitive ESD/lightning events |
| ID at VWM | <0.5 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | 150 °C - enables reliable operation in high-temperature industrial environments |
| Package | SMB (DO-214AA) - surface-mount outline compatible with standard pick-and-place equipment and reflow profiles |
Pinout & Package
Two-terminal device in SMB (DO-214AA) package; no cathode band marking due to bidirectional functionality. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with M3 suffix indicating halogen-free, RoHS-compliant, industrial-grade construction meeting JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; no polarity dependency simplifies PCB routing and layout |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional configuration; eliminates risk of incorrect orientation during assembly |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system-level overvoltage thresholds without margin stacking |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) in properly designed interfaces |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| Low leakage <0.5 μA | Prevents DC loading on high-impedance sensor outputs or reference nodes |
| Halogen-free, RoHS-compliant | Fulfills environmental compliance requirements for global industrial and telecom equipment shipments |
Applications
| Industrial Sensor Protection | Telecom Interface Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to motor drive noise in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients induced by relay coil de-energization or EFT bursts. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADC front-ends while maintaining signal fidelity below 85 V. | Use Scenario: Shielding RS-485 transceiver I/O pins from lightning-induced surges in outdoor base station backhaul links. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed directly at connector entry point, ahead of isolation and level-shifting circuitry. Use Value: Limits clamped voltage to 135 V, staying within absolute maximum ratings of ISO3082 and similar isolated transceivers. |
| Consumer Power Adapter Input | Automotive Body Control Module |
Use Scenario: Secondary-side overvoltage suppression on 12 V DC output rails of wall-mounted AC/DC adapters subject to load-dump transients. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing short-duration spikes from switching regulator instability or cable disconnection events. Use Value: Maintains 85 V VWM margin above nominal 12 V rail, ensuring no conduction during normal operation while reacting within nanoseconds to faults. | Use Scenario: Protecting LIN bus transceiver inputs against battery reverse connection and jump-start surges in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamp safeguarding transceiver pins against ±35 V transients defined in ISO 16750-2. Use Value: Matches automotive surge test profiles with verified 135 V clamping performance at 4.46 A, avoiding need for additional series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA-E3/52 | Same VWM/VBR/PPPM specs; differs in packaging (tape-and-reel vs. bulk), MSL Level 1 compliance, and RoHS status (E3 = lead-free, not halogen-free) | Approved for automotive AEC-Q200 but lacks halogen-free certification required for some industrial OEMs | Select when lead-free compliance suffices and halogen-free is not mandated |
| P6SMB85CA | Identical electrical specs and SMB package; different branding (Littelfuse), same 600 W rating and 135 V VC, but MSL Level 2 (requires baking prior to reflow) | Valid for consumer electronics with controlled humidity storage, not ideal for high-mix industrial SMT lines with extended floor life needs | Choose when supply chain diversification is prioritized and MSL Level 1 is not critical |
Compared with SMBJ85CD-M3/H, SMBJ85CA-E3/52 offers identical protection performance but omits halogen-free assurance, while P6SMB85CA matches core specs yet requires moisture-sensitive handling - making SMBJ85CD-M3/H optimal for industrial deployments demanding both environmental compliance and process robustness.
Availability
SMBJ85CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor protection, telecom interface hardening, consumer power adapter safety, and automotive body control module designs requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ85CD-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and industrial-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments, targeting applications where consistent clamping behavior, tight parameter tolerances, and long-term stability under thermal cycling are mandatory.
FAQ
What is the clamping voltage of SMBJ85CD-M3/H and how is it measured?
The SMBJ85CD-M3/H has a maximum clamping voltage (VC) of 135 V, measured at its peak pulse current (IPPM) of 4.46 A using a 10/1000 μs double-exponential surge waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case transient events, and is guaranteed per Vishay's characterization in Document Number 87606. The SMBJ85CD-M3/H maintains this clamping performance across its full operating temperature range.
Is SMBJ85CD-M3/H unidirectional or bidirectional, and how can I identify its polarity?
SMBJ85CD-M3/H is a bidirectional TVS diode, indicated by the "CD" suffix in its part number and confirmed by its symmetrical electrical characteristics in both directions. Unlike unidirectional variants (e.g., SMBJ85D), it has no cathode band marking on the SMB package - absence of the band is the visual identifier for bidirectional configuration, eliminating polarity-dependent placement errors during assembly.
What does the "-M3/H" suffix mean in SMBJ85CD-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with matte tin-plated leads qualified to JESD 201 Class 2 whisker resistance. The "/H" indicates packaging in 7" diameter plastic tape and reel, with 750 units per reel - a standard format for automated SMT placement. Together, SMBJ85CD-M3/H specifies both material compliance and delivery format per Vishay's ordering nomenclature in Document 87606.
Can SMBJ85CD-M3/H be used in automotive applications?
Yes, SMBJ85CD-M3/H meets key automotive stress requirements including 150 °C maximum junction temperature, robust surge handling (600 W, 10/1000 μs), and MSL Level 1 reflow compatibility. While not AEC-Q200 certified out-of-box, it is widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces - design validation per ISO 16750-2 is recommended for specific use cases involving SMBJ85CD-M3/H.
How does SMBJ85CD-M3/H compare to SMBJ85D in terms of protection capability?
SMBJ85CD-M3/H provides symmetrical bidirectional clamping, whereas SMBJ85D is unidirectional and conducts only in reverse bias. Both share identical VWM (85 V), VBR (95.7–103 V), and VC (135 V), but SMBJ85CD-M3/H protects against transients of either polarity without external circuitry - making it preferable for AC-coupled lines, differential buses like RS-485, or systems where voltage reversal risk exists. The SMBJ85CD-M3/H thus delivers broader protection coverage with identical footprint and thermal performance.
SMBJ85CD-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):
- 85V
- Voltage - Breakdown (Min):
- 95.7V
- Voltage - Clamping (Max) @ Ipp:
- 135V
- Current - Peak Pulse (10/1000µs):
- 4.46A
- 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)
SMBJ85CD-M3/H FAQ
1.How can I place an order for SMBJ85CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ85CD-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 SMBJ85CD-M3/H reliable?
The price and inventory of SMBJ85CD-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 SMBJ85CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ85CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ85CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ85CD-M3/H?
SMBJ85CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ85CD-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 SMBJ85CD-M3/H?
For technical support, including SMBJ85CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ85CD-M3/H requirements.
6.How does Aetrix verify that SMBJ85CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ85CD-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 SMBJ85CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ85CD-M3/H?
All SMBJ85CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ85CD-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 SMBJ85CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ85CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ85CD-M3/H Tags
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Diodes Incorporated
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