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Vishay General Semiconductor - Diodes Division SMC5K85CA-M3/H
- Part No.:
- SMC5K85CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K85CA-M3/H.pdf
- Description:
- TVS DIODE 85VWM 137VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
SMC5K85CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR), and 5000 W peak pulse power (10/1000 μs). It clamps transients to 137 V at 36.5 A and operates from –55 °C to +175 °C, protecting automotive sensor signal lines against lightning-induced surges.
For engineers reviewing the SMC5K85CA-M3/H datasheet, SMC5K85CA-M3/H pinout, SMC5K85CA-M3/H application, or SMC5K85CA-M3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with 8/20 μs (40 kW) and 10/1000 μs surge waveforms in high-reliability automotive and industrial systems.
Technical Context
This TVS diode uses an avalanche junction structure optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of inductive switching transients and ESD events up to 30 kV (IEC 61000-4-2 contact/air mode). Its bidirectional configuration eliminates polarity concerns in AC-coupled or differential signal paths.
The device is thermally characterized with RthJA = 90 °C/W and RthJM = 4.0 °C/W, supporting high-power transient absorption without thermal runaway under repeated surge conditions. It meets UL 497B safety recognition (E136766) and RoHS/halogen-free compliance per M3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 94.4 V / 104 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM (10/1000 μs) | 137 V at 36.5 A - Clamped voltage during 5000 W surge; determines protected circuit's maximum transient exposure. |
| PPPM | 5000 W - Peak pulse power handling for 10/1000 μs waveform; validates robustness against common load-switching transients. |
| TJ max. | +175 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial settings. |
| ESD Rating | ±30 kV (HBM, contact & air) - Complies with IEC 61000-4-2; provides system-level ESD immunity without external protection layers. |
| Polarity | Bidirectional - Symmetric clamping for AC signals or unidirectional lines where polarity is undefined or reversible. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. No cathode band marking due to bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identically as surge current entry/exit points; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test requirements. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; supports standard SMT reflow without baking preconditioning. |
| UL 497B recognition (E136766) | Meets safety standards for primary and secondary circuit protection in telecom and industrial equipment. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors; improves system robustness. |
| 8/20 μs waveform support (40 kW) | Handles high-energy lightning surges per IEC 61000-4-5; extends protection beyond basic 10/1000 μs switching events. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units and ADAS modules from load dump and ESD. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or IC input pins to shunt transients before they reach sensitive silicon. Use Value: Maintains signal integrity under ±30 kV ESD and 40 kW lightning surges while operating continuously at 175 °C ambient. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against inductive kickback from solenoids, relays, and motor drives. IC Role / Device Role / Timing Role: Fast-response transient suppressor mounted at PCB edge connectors to absorb 10/1000 μs switching spikes before propagation into logic circuitry. Use Value: Enables >100,000 surge cycles without degradation, reducing field failure rates in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Front-end protection for Ethernet PHYs, DSL modems, and PoE injectors exposed to induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary surge arrestor on differential data lines, coordinated with secondary GDT or polymer PTC devices. Use Value: Clamps 8/20 μs surges to <140 V while maintaining <1 nA leakage at 85 V, preserving signal-to-noise ratio. |
Use Scenario: Secondary-side transient suppression on DC output rails of wall adapters and USB PD chargers subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) bidirectional clamp preventing latch-up in downstream DC-DC converters and USB controllers. Use Value: Prevents overvoltage damage during 30 kV ESD events without affecting 5–20 V regulated output stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85CA-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), same VWM/VBR range, non-AEC-Q101. | Suitable for cost-sensitive consumer electronics with lower surge threat levels; not qualified for automotive use. | Select when board space is constrained and AEC-Q101 is not required; verify thermal derating for repeated surges. |
| 1.5KE85CA (ON Semiconductor) | Higher package thermal resistance (RthJA ≈ 120 °C/W), axial lead DO-201AE, same 85 V VWM, 5000 W rating. | Requires through-hole assembly; used in legacy industrial power supplies where SMT is not feasible. | Choose only for through-hole designs needing identical electrical specs; avoid in new SMT automotive platforms. |
Compared with SMAJ85CA-E3/5A and 1.5KE85CA, the SMC5K85CA-M3/H delivers superior thermal performance (RthJM = 4.0 °C/W), AEC-Q101 qualification, and SMC package compatibility with automated SMT lines-making it the preferred choice for next-generation automotive and high-reliability industrial designs.
Availability
SMC5K85CA-M3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMC5K85CA-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, efficiency, and application-specific optimization.
The SMC5KxxCA family was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 175 °C operation are mandatory design requirements.
FAQ
What is the clamping voltage of the SMC5K85CA-M3/H under a 10/1000 μs surge?
The SMC5K85CA-M3/H clamps to a maximum of 137 V at 36.5 A under a 10/1000 μs waveform, as specified in the Vishay datasheet (Document Number: 87024). This value ensures downstream ICs experience controlled overvoltage during standardized surge events. The SMC5K85CA-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K85CA-M3/H suitable for automotive applications?
Yes, the SMC5K85CA-M3/H is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood and chassis-mounted automotive systems. Its bidirectional architecture and 30 kV ESD rating align with ISO 10605 and ISO 7637-2 requirements. The SMC5K85CA-M3/H is commonly deployed in engine control units and ADAS sensor interfaces.
Does the SMC5K85CA-M3/H have polarity markings on the package?
No, the SMC5K85CA-M3/H has no cathode band or polarity marking because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing unrestricted orientation during PCB placement. This simplifies layout and eliminates risk of reverse installation errors in symmetric signal paths.
What is the moisture sensitivity level (MSL) of the SMC5K85CA-M3/H?
The SMC5K85CA-M3/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at standard conditions (≤30 °C / 60% RH) and requires no baking prior to reflow soldering. This eliminates handling constraints in high-volume SMT manufacturing and supports just-in-time assembly workflows for the SMC5K85CA-M3/H.
How does the SMC5K85CA-M3/H compare to the SMC5K85CAHM3/H variant?
The SMC5K85CAHM3/H adds explicit AEC-Q101 qualification documentation in its part number suffix, whereas the SMC5K85CA-M3/H carries AEC-Q101 qualification per the family datasheet but omits "H" in the marking code. Electrically and thermally, both share identical specifications-including VWM, VBR, PPPM, and RthJM-and are interchangeable in design. The SMC5K85CA-M3/H remains fully compliant and validated.
SMC5K85CA-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 36.5A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K85CA-M3/H FAQ
1.How can I place an order for SMC5K85CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K85CA-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 SMC5K85CA-M3/H reliable?
The price and inventory of SMC5K85CA-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 SMC5K85CA-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K85CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K85CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K85CA-M3/H?
SMC5K85CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K85CA-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 SMC5K85CA-M3/H?
For technical support, including SMC5K85CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K85CA-M3/H requirements.
6.How does Aetrix verify that SMC5K85CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K85CA-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 SMC5K85CA-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K85CA-M3/H?
All SMC5K85CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K85CA-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 SMC5K85CA-M3/H part is unused and in its original packaging.
Return procedure for SMC5K85CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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