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Vishay General Semiconductor - Diodes Division SMC5K75A-M3/H
- Part No.:
- SMC5K75A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K75A-M3/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,582
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Product details
Overview
SMC5K75A-M3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 121 V under 41.3 A surge current, and operates with 75 V stand-off voltage and 83.3–92.1 V breakdown range at 1 mA test current.
For engineers reviewing the SMC5K75A-M3/H datasheet, SMC5K75A-M3/H pinout, SMC5K75A-M3/H application, or SMC5K75A-M3/H equivalent, this device is selected for automotive-grade ESD/surge protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.30), and AEC-Q101 qualification are critical - especially in 12 V/24 V DC systems with inductive load switching.
Technical Context
This TVS diode uses a silicon avalanche junction to provide precise voltage clamping during transient events. Its unidirectional configuration enables protection of DC-biased lines without reverse conduction, and its low incremental surge resistance ensures minimal voltage overshoot during high-current surges up to 41.3 A (10/1000 μs).
Thermal design is supported by RthJA = 90 °C/W and RthJM = 4.0 °C/W, enabling reliable operation up to TJ = +150 °C. It meets IEC 61000-4-2 ESD immunity (30 kV contact/air) and UL 497B safety recognition (E136766), with halogen-free, RoHS-compliant construction per JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 75 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12 V/24 V automotive or industrial rails. |
| Breakdown Voltage (VBR) | 83.3–92.1 V at 1 mA - tight tolerance ensures predictable turn-on across temperature and production lots. |
| Clamping Voltage (VC) | 121 V at 41.3 A (10/1000 μs) - limits downstream voltage stress during worst-case transients; clamping ratio VC/VBR ≈ 1.30. |
| Peak Pulse Power (PPPM) | 5000 W (10/1000 μs) - supports high-energy surge suppression per ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4. |
| Operating Temperature | -55 °C to +150 °C - qualified for under-hood automotive environments and industrial control cabinets. |
| ESD Rating | 30 kV HBM (contact & air) - exceeds IEC 61000-4-2 Level 4 for robust board-level ESD hardening. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), halogen-free and RoHS-compliant. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | Protected line input | Connected to the line being protected (e.g., battery rail, sensor supply); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables DC-biased line protection without leakage during normal operation; avoids false triggering on negative-going signals. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring long-term reliability under thermal cycling and vibration. |
| Low clamping ratio (VC/VBR ≈ 1.30) | Minimizes overvoltage stress on downstream ICs like MCUs, CAN transceivers, or power MOSFETs during surge events. |
| Fast response time (< 1 ns) | Engages before transient energy couples into sensitive circuitry - critical for protecting high-speed interfaces and precision analog front-ends. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point; absorbs >5000 W surge energy within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs by limiting rail voltage to ≤121 V during 100 V/300 ms load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Point-of-entry TVS on twisted-pair or shielded cable interface; co-located with common-mode choke. Use Value: Maintains signal integrity by suppressing 30 kV HBM ESD pulses before they reach instrumentation amplifiers or ADC inputs. |
| Telecom DC Power Feeds | Consumer Device USB/DC Input Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) against lightning-induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Secondary surge limiter downstream of primary GDT/MOV stage; handles residual fast-rising transients. Use Value: Ensures compliance with IEC 61000-4-5 (4 kV line-earth) by clamping residual voltage to ≤121 V at 41.3 A, preserving Ethernet PHY and PMIC functionality. |
Use Scenario: Hardening 5 V/9 V/12 V DC input ports of smart speakers, set-top boxes, and gaming peripherals against user-handling ESD. IC Role / Device Role / Timing Role: Final-stage TVS on main power rail; placed after fuse and upstream of DC-DC converter. Use Value: Survives repeated 30 kV contact ESD strikes without parameter shift, eliminating field returns due to input-stage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-M3/5B | Lower PPPM (600 W), SMB package (smaller footprint), same VWM/VBR range, no AEC-Q101 qualification. | Targeted at cost-sensitive consumer or non-automotive industrial designs where 5000 W surge rating is not required. | Select when space constraints favor SMB and surge threat level is limited to IEC 61000-4-5 Level 2 (1 kV line-earth). |
| SMC5K75CA-M3/H | Bi-directional variant; identical VWM/VBR/PPPM specs but symmetric clamping for AC-coupled or floating lines. | Required for differential signal lines (e.g., RS-485, CAN bus) or AC-powered circuits where polarity reversal occurs. | Choose only if bidirectional protection is needed; otherwise SMC5K75A-M3/H offers lower leakage and better DC bias compatibility. |
Compared with SMBJ75A-M3/5B and SMC5K75CA-M3/H, the SMC5K75A-M3/H uniquely combines 5000 W surge capability, AEC-Q101 qualification, and unidirectional operation in the robust SMC package - making it optimal for high-reliability automotive and industrial DC power rail protection where asymmetric transients dominate.
Availability
SMC5K75A-M3/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMC5K75A-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, rectifiers, and protection devices for demanding industrial and automotive applications.
The SMC5KxxA series was engineered specifically for high-energy transient suppression in 12 V–85 V DC systems, emphasizing AEC-Q101 qualification, low clamping ratio, and robust thermal performance in surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMC5K75A-M3/H under a 10/1000 μs surge?
The SMC5K75A-M3/H clamps to a maximum of 121 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 41.3 A. This value is measured per Figure 3 in the Vishay datasheet (Document Number: 87742) and represents the upper limit of voltage seen by downstream components during such a transient event. The SMC5K75A-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K75A-M3/H AEC-Q101 qualified?
No - the SMC5K75A-M3/H is not AEC-Q101 qualified. Per the Vishay datasheet, AEC-Q101 qualification applies only to the HM3 suffix variants (e.g., SMC5K10AHM3_A/H through SMC5K20AHM3_A/H). The SMC5K75A-M3/H is an industrial-grade part, confirmed by the note "SMC5K22A to SMC5K85A for industrial grade only" on page 1 of Document Number 87742. The SMC5K75A-M3/H remains fully RoHS-compliant and halogen-free.
What does the "-M3/H" suffix indicate in SMC5K75A-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance, while "/H" specifies packaging in 7-inch plastic tape and reel with a base quantity of 850 units. This ordering code aligns with Vishay's preferred package coding system shown in the Ordering Information table on page 3 of Document Number 87742. The SMC5K75A-M3/H is supplied in standard SMC (DO-214AB) format with matte tin-plated leads.
Can the SMC5K75A-M3/H be used in bidirectional signal lines like RS-485?
No - the SMC5K75A-M3/H is unidirectional and unsuitable for bidirectional AC-coupled or floating signal lines. For RS-485, CAN, or other differential interfaces, the bi-directional variant SMC5K75CA-M3/H must be used instead. Using the unidirectional SMC5K75A-M3/H on such lines would allow conduction only in one polarity, risking damage during negative transients and violating signal integrity requirements.
What is the thermal resistance junction-to-ambient (RthJA) for the SMC5K75A-M3/H?
The thermal resistance junction-to-ambient (RthJA) for the SMC5K75A-M3/H is 90 °C/W, measured per JEDEC® 51-2A on FR4 PCB with 2 oz. copper and standard SMC footprint. This value assumes natural convection cooling and is critical for calculating maximum power dissipation at elevated ambient temperatures. Derating curves in Figure 2 of the Vishay datasheet (87742) confirm usable power drops to ~60% at TA = 100 °C, directly impacting SMC5K75A-M3/H reliability in enclosed enclosures.
SMC5K75A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- Power - Peak Pulse:
- 5000W (5kW)
- 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-214AB (SMC)
SMC5K75A-M3/H FAQ
1.How can I place an order for SMC5K75A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K75A-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 SMC5K75A-M3/H reliable?
The price and inventory of SMC5K75A-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 SMC5K75A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K75A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K75A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K75A-M3/H?
SMC5K75A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K75A-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 SMC5K75A-M3/H?
For technical support, including SMC5K75A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K75A-M3/H requirements.
6.How does Aetrix verify that SMC5K75A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K75A-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 SMC5K75A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K75A-M3/H?
All SMC5K75A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K75A-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 SMC5K75A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K75A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K75A-M3/H Tags
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