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Vishay General Semiconductor - Diodes Division SMC5K45CA-M3/H
- Part No.:
- SMC5K45CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K45CA-M3/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,546
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Product details
Overview
SMC5K45CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V clamping voltage (VC) at 68.8 A (10/1000 μs), 5000 W peak pulse power, and AEC-Q101 qualification - deployed to protect MOSFETs and signal lines in automotive powertrain control units.
For engineers reviewing the SMC5K45CA-M3/H datasheet, SMC5K45CA-M3/H pinout, SMC5K45CA-M3/H application, or SMC5K45CA-M3/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, bidirectional polarity, junction temperature range (−55 °C to +175 °C), RoHS/halogen-free compliance, and MSL level 1 reflow capability.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its bidirectional structure enables symmetric clamping across both polarities without external polarity management.
It delivers 5000 W peak pulse power per 10/1000 μs waveform and sustains 40 kW under 8/20 μs surges, with low incremental surge resistance ensuring minimal voltage overshoot during high-current transients. Thermal resistance junction-to-mount is 4.0 °C/W, supporting robust thermal dissipation in high-reliability PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Ensures predictable turn-on threshold across manufacturing lot and temperature. |
| VC @ IPPM | 72.7 V at 68.8 A (10/1000 μs) - Clamping voltage directly limits stress on downstream ICs like microcontrollers or gate drivers. |
| PPPM | 5000 W (10/1000 μs) - Specifies maximum single-pulse energy handling capacity under standard lightning surge test conditions. |
| TJ max. | +175 °C - Enables operation in under-hood automotive environments and industrial motor drive enclosures. |
| Polarity | Bidirectional - Eliminates need for orientation-aware placement; protects AC-coupled or differential signal paths. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 90 °C/W junction-to-ambient thermal resistance on FR4. |
Pinout & Package
SMC5K45CA-M3/H uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, no cathode band (bidirectional), compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals serve identically as clamping nodes; no polarity marking required for board layout. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides primary heat conduction path to PCB copper pour via bottom surface contact. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TCT, and ESD. |
| UL 497B recognized (E136766) | Meets safety standards for telecom and industrial surge protection circuits requiring certified isolation barriers. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| 30 kV HBM ESD immunity | Withstands contact-mode electrostatic discharge events exceeding IEC 61000-4-2 Level 4 without degradation. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance mandates for EU, China RoHS, and automotive OEM sustainability programs. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting gate driver ICs and current-sense amplifiers in 12 V/48 V hybrid vehicle inverters exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping device that activates within <1 ns to limit transient voltage to ≤72.7 V during 68.8 A surges. Use Value: Prevents latch-up or oxide rupture in SiC MOSFET drivers by holding rail voltage below absolute maximum ratings during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding RS-485 transceivers and encoder feedback lines in servo drives subjected to back-EMF spikes from brushed DC motors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines to suppress common-mode transients up to 40 kW (8/20 μs). Use Value: Maintains signal integrity and prevents false triggering of position feedback by limiting bus voltage excursion to ±72.7 V during repetitive switching surges. |
| Telecom Base Station Power Input | Consumer Appliance Mainboard Protection |
Use Scenario: Front-end surge suppression on −48 V DC input rails of 5G remote radio units, where lightning-induced surges exceed 10 kA. IC Role / Device Role / Timing Role: Primary coarse-clamp TVS staged before DC-DC converters and hot-swap controllers. Use Value: Absorbs >5000 W pulses without failure, enabling system-level compliance with ITU-T K.20 and IEC 61000-4-5 Ed.3 Class 4. |
Use Scenario: Protecting MCU I/O pins and touch controller inputs in smart washing machines against ESD from user interaction and relay coil transients. IC Role / Device Role / Timing Role: Localized bidirectional clamp mounted adjacent to connectors and switches. Use Value: Guarantees >30 kV air/contact ESD robustness per IEC 61000-4-2 while maintaining low leakage (<1 μA at 45 V) during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 110 °C/W), same VWM/VBR range. | Targeted at space-constrained consumer electronics; insufficient for automotive load-dump duty cycles. | Select only when peak surge energy is ≤400 W and board area is critical; not suitable for AEC-Q101 systems. |
| 1.5KE45CA (ON Semiconductor) | Through-hole DO-201 package, identical VWM/VBR/VC specs, 5000 W rating, but no AEC-Q101 or MSL Level 1 qualification. | Used in legacy industrial power supplies where reflow compatibility and automotive qualification are not required. | Choose for cost-sensitive through-hole designs; avoid in new automotive or high-volume SMT production. |
Compared with SMAJ45CA-E3/5A and 1.5KE45CA, the SMC5K45CA-M3/H uniquely combines AEC-Q101 qualification, MSL Level 1 reflow readiness, and 5000 W SMT-compatible surge handling - making it the only option qualified for next-generation automotive and industrial SMT platforms requiring zero derating at +125 °C ambient.
Availability
SMC5K45CA-M3/H is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drives, telecom base station power inputs, and consumer appliance mainboards requiring stable component supply across multi-year production cycles.
Supply support for SMC5K45CA-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, power efficiency, and automotive-grade qualification.
The SMC5KxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial automation, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMC5K45CA-M3/H under a 10/1000 μs surge?
The SMC5K45CA-M3/H has a maximum clamping voltage (VC) of 72.7 V at 68.8 A under the standardized 10/1000 μs waveform. This value is measured per Fig. 3 in the Vishay datasheet 87024 and represents the upper bound of voltage seen by protected circuitry during worst-case transient events. The SMC5K45CA-M3/H maintains this clamping performance across its full operating temperature range (−55 °C to +175 °C), with minimal derating up to +125 °C.
Is the SMC5K45CA-M3/H suitable for automotive applications?
Yes, the SMC5K45CA-M3/H is AEC-Q101 qualified per the Vishay datasheet revision 10-Sep-2024, confirming compliance with stress tests including high-temperature operating life, temperature cycling, and ESD. Its SMC (DO-214AB) package supports MSL Level 1 reflow, and its 175 °C maximum junction temperature enables use in engine control units and battery management systems. The SMC5K45CA-M3/H is explicitly listed in Vishay's automotive-grade product portfolio for powertrain and chassis applications.
Does the SMC5K45CA-M3/H have polarity markings?
No, the SMC5K45CA-M3/H is a bidirectional TVS diode and carries no cathode band or polarity marking on its SMC (DO-214AB) package. Both terminals are functionally identical, allowing unrestricted orientation during automated placement. This symmetry simplifies PCB layout for differential signal lines and AC-coupled interfaces, and eliminates risk of reverse installation - a key advantage over unidirectional variants like SMC5K45A-M3/H.
What is the peak pulse current rating for the SMC5K45CA-M3/H?
The SMC5K45CA-M3/H supports a peak pulse current (IPPM) of 68.8 A under the 10/1000 μs waveform and 423 A under the 8/20 μs waveform, as specified in Table 1 of Vishay document 87024. These values are derived from the device's 5000 W and 40 kW peak pulse power ratings respectively, using the corresponding clamping voltages (72.7 V and 94.6 V). The SMC5K45CA-M3/H maintains these ratings with no derating up to +25 °C ambient, with linear reduction above that per Fig. 2.
How does the SMC5K45CA-M3/H compare to the SMC5K45CAHM3/H variant?
The SMC5K45CA-M3/H and SMC5K45CAHM3/H share identical electrical specifications, package, and marking code (5GFV), but differ in qualification status: only the HM3 suffix denotes AEC-Q101 qualification per note (1) in the Vishay datasheet. The SMC5K45CA-M3/H is industrial-grade and halogen-free/RoHS-compliant, while SMC5K45CAHM3/H adds automotive stress validation. Both use the same SMC (DO-214AB) package and 7" tape-and-reel packaging (H code), and the SMC5K45CA-M3/H remains suitable for non-automotive industrial use cases requiring high surge robustness.
SMC5K45CA-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 68.8A
- 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)
SMC5K45CA-M3/H FAQ
1.How can I place an order for SMC5K45CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K45CA-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 SMC5K45CA-M3/H reliable?
The price and inventory of SMC5K45CA-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 SMC5K45CA-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K45CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K45CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K45CA-M3/H?
SMC5K45CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K45CA-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 SMC5K45CA-M3/H?
For technical support, including SMC5K45CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K45CA-M3/H requirements.
6.How does Aetrix verify that SMC5K45CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K45CA-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 SMC5K45CA-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K45CA-M3/H?
All SMC5K45CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K45CA-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 SMC5K45CA-M3/H part is unused and in its original packaging.
Return procedure for SMC5K45CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K45CA-M3/H Tags
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