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Vishay General Semiconductor - Diodes Division SMC5K70CA-M3/H
- Part No.:
- SMC5K70CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K70CA-M3/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,605
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Product details
Overview
SMC5K70CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V clamping voltage (VC) at 44.2 A (10/1000 μs), and 5000 W peak pulse power rating - deployed to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K70CA-M3/H datasheet, SMC5K70CA-M3/H pinout, SMC5K70CA-M3/H application, or SMC5K70CA-M3/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 175 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly using matte tin-plated leads per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during transient overvoltage events, leveraging avalanche breakdown to shunt surge current away from protected circuitry. Its bidirectional architecture enables symmetrical clamping on both polarities without polarity marking, and its 5000 W (10/1000 μs) rating supports robust protection against inductive switching spikes and lightning-induced surges.
The SMC5K70CA-M3/H exhibits 44.2 A peak pulse current (IPPM) at 10/1000 μs, 146 V clamping under 8/20 μs waveform, and thermal resistance of 90 °C/W (junction-to-ambient) on FR4 PCB - confirming suitability for high-reliability applications where sustained thermal dissipation and fast response (<1 ns) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V and 60 V DC systems. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche onset range ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 113 V at 44.2 A (10/1000 μs) - clamping voltage directly limits stress on downstream components during standardized surge events. |
| PPPM | 5000 W (10/1000 μs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges. |
| TJ max. | +175 °C - extended junction temperature rating supports operation in under-hood automotive and high-ambient industrial environments. |
| Polarity | Bidirectional - eliminates need for orientation during placement; protects AC-coupled or differential signal paths without external biasing. |
| ESD Rating | ±30 kV HBM (contact & air) - exceeds IEC 61000-4-2 requirements, enabling use in exposed connectors and human-accessible interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL level 1 (260 °C reflow peak), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Surge current return path | Bidirectional construction means both terminals serve identically as current entry/exit points during positive/negative transients; no cathode band marking required. |
| Anode (Cathode) | Surge current return path | Electrically symmetric - terminal assignment is arbitrary; PCB layout requires no polarity-aware footprint. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for engine control, ADAS, and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns), improving protection margin for sensitive gate drivers and microcontrollers. |
| UL 497B recognized (E136766) | Meets safety standards for telecom and industrial interface protection, supporting regulatory compliance without additional system-level certification effort. |
| MSL Level 1, 260 °C peak | Enables single-pass lead-free reflow without moisture sensitivity concerns - reduces manufacturing risk and eliminates bake requirements. |
| 175 °C TJ max | Supports placement near heat sources (e.g., power converters, motor drivers) without derating penalties typical of lower-TJ TVS devices. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 48 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping element placed at input filter stage to limit bus voltage excursion to ≤113 V during 100 V/50 ms load dump events. Use Value: Prevents latch-up or permanent damage to buck controllers and CAN transceivers by maintaining voltage below their absolute maximum ratings. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) shunt protector on 4–20 mA loop outputs exposed to EMI and ground bounce. Use Value: Maintains signal integrity during 4 kV EFT bursts while adding <0.5 ns propagation delay - no impact on loop update timing. |
| Telecom Interface Ports | Consumer Power Adapter Inputs |
|
Use Scenario: Surge suppression on RJ45 Ethernet PHY power rails and MDI pairs in PoE-powered switches. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tube (GDT), clamping residual transients after GDT arc initiation. Use Value: Limits let-through voltage to <146 V (8/20 μs) - within IEEE 802.3af/at isolation barrier withstand limits. |
Use Scenario: Input-stage overvoltage clamp in universal-input (90–264 VAC) AC-DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) crowbar device triggered by MOV failure or rectifier reverse recovery spikes. Use Value: Absorbs up to 5000 W surge energy without degradation, extending adapter MTBF beyond 10 years in harsh mains environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70CA-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 110 °C/W), same VWM/VBR range. | Not rated for AEC-Q101; limited to consumer/industrial non-automotive use. | Select when board space is constrained and surge energy demand is ≤400 W (e.g., USB port protection). |
| 1.5KE70CA (ON Semiconductor) | Through-hole DO-201 package, 5000 W rating, but MSL level 2, no AEC-Q101, higher leakage (>5 μA at VWM). | Requires wave soldering; unsuitable for automated SMT lines or automotive qualification programs. | Choose only for legacy through-hole designs where rework flexibility outweighs production efficiency and qualification needs. |
Compared with SMAJ70CA-E3/5A and 1.5KE70CA, the SMC5K70CA-M3/H delivers automotive-grade reliability, superior thermal performance (RthJA = 90 °C/W), and full SMT process compatibility - making it the optimal choice for new high-volume automotive and industrial designs requiring zero rework and long-term supply stability.
Availability
SMC5K70CA-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal conditioning, and telecom interface protection requiring stable component supply, AEC-Q101 compliance, and consistent SMT manufacturability.
Supply support for SMC5K70CA-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMC5K70CA-M3/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for robust transient suppression in harsh electromagnetic environments where failure is not an option.
FAQ
What is the clamping voltage of the SMC5K70CA-M3/H under a 10/1000 μs surge?
The SMC5K70CA-M3/H has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current of 44.2 A with a 10/1000 μs waveform. This value is measured per Fig.3 in the official Vishay datasheet (Doc. #87024, Rev. 10-Sep-2024) and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the SMC5K70CA-M3/H qualified for automotive applications?
Yes, the SMC5K70CA-M3/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 87024, page 3, "Note (1) AEC-Q101 qualified"). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD - confirming suitability for under-hood and chassis-mounted automotive electronics.
Does the SMC5K70CA-M3/H have polarity markings on the package?
No, the SMC5K70CA-M3/H is a bidirectional TVS diode and carries no cathode band or polarity marking. As confirmed in the "MECHANICAL DATA" section of the Vishay datasheet, "Polarity: no cathode band for bidirectional types", enabling orientation-agnostic placement during SMT assembly.
What is the thermal resistance of the SMC5K70CA-M3/H on a standard FR4 PCB?
The SMC5K70CA-M3/H has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on an FR4 PCB per JEDEC® 51-2A standard footprint, as specified in the "THERMAL CHARACTERISTICS" table (page 3, Doc. #87024). This value assumes 2 oz. copper and standard pad layout per the provided outline drawing.
How does the SMC5K70CA-M3/H compare to the SMC5K70CAHM3/H variant?
The SMC5K70CA-M3/H and SMC5K70CAHM3/H share identical electrical and thermal specifications, but the HM3 suffix denotes AEC-Q101 qualification and enhanced material traceability. The SMC5K70CA-M3/H is industrial grade (halogen-free, RoHS-compliant), while HM3 adds automotive qualification - both use the same SMC (DO-214AB) package and M3 plating.
SMC5K70CA-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 44.2A
- 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)
SMC5K70CA-M3/H FAQ
1.How can I place an order for SMC5K70CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K70CA-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 SMC5K70CA-M3/H reliable?
The price and inventory of SMC5K70CA-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 SMC5K70CA-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K70CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K70CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K70CA-M3/H?
SMC5K70CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K70CA-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 SMC5K70CA-M3/H?
For technical support, including SMC5K70CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K70CA-M3/H requirements.
6.How does Aetrix verify that SMC5K70CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K70CA-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 SMC5K70CA-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K70CA-M3/H?
All SMC5K70CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K70CA-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 SMC5K70CA-M3/H part is unused and in its original packaging.
Return procedure for SMC5K70CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K70CA-M3/H Tags
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