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Vishay General Semiconductor - Diodes Division SMC3K45CA-M3/57
- Part No.:
- SMC3K45CA-M3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K45CA-M3/57.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,702
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Product details
Overview
SMC3K45CA-M3/57 from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 45 V standoff voltage, 50.0–55.3 V breakdown voltage at 1 mA, and clamps to ≤72.7 V at 41.3 A surge current. It protects MOSFETs, sensor signal lines, and ICs against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SMC3K45CA-M3/57 datasheet, SMC3K45CA-M3/57 pinout, SMC3K45CA-M3/57 application, or SMC3K45CA-M3/57 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with wave soldering on PCB top side only.
Technical Context
The SMC3K45CA-M3/57 operates as a silicon avalanche diode-based TVS, leveraging controlled reverse-biased breakdown to clamp transient overvoltages before they damage downstream circuitry. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond spikes induced by inductive load switching.
Designed for unidirectional layout integration despite bidirectional polarity, it features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 497B safety recognition (E136766). Thermal derating begins above 25 °C ambient, with maximum junction temperature limited to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000 W (10/1000 μs waveform) - sustains high-energy transients without failure |
| Standoff Voltage (VWM) | 45 V - blocks normal operating voltage while remaining non-conductive |
| Breakdown Voltage (VBR) | 50.0–55.3 V at 1 mA - defines precise avalanche initiation threshold |
| Clamping Voltage (VC) | ≤72.7 V at 41.3 A IPPM - limits maximum voltage seen by protected device |
| Operating Temperature | −55 °C to +150 °C - supports under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount footprint with 8.0 mm × 8.0 mm copper pad requirement |
| Polarity | Bidirectional - suppresses positive and negative transients without orientation dependency |
Pinout & Package
SMC3K45CA-M3/57 uses the SMC (DO-214AB) package: molded plastic case with two coplanar cathode/anode terminals, no polarity marking for bidirectional variants, and matte tin-plated leads. Mounting requires 0.185" (4.69 mm) max lead length and 0.126" (3.20 mm) min terminal width per Vishay mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during negative transient | One of two symmetrical terminals; no marking distinguishes anode/cathode in bidirectional configuration |
| Cathode | Current entry during positive transient | Electrically identical to anode; device functions identically regardless of orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85 % RH - no baking required prior to reflow |
| UL 497B recognition | E136766 file number confirms compliance for secondary-circuit surge protection in safety-critical systems |
| Halogen-free & RoHS | M3 suffix denotes compliant molding compound and terminations - meets environmental mandates without performance trade-off |
| Low clamping ratio | VC/VWM = 72.7/45 ≈ 1.62 - tighter voltage control than typical TVS diodes (often >1.7) |
Applications
| Automotive Body Control Module | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver signal lines from load-dump and inductive kickback in BCMs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface before signal conditioning stage. Use Value: Limits transient voltage to ≤72.7 V during 41.3 A surges, preventing latch-up or gate oxide rupture in 5 V/3.3 V logic interfaces. |
Use Scenario: Shields 24 V DC digital input channels from relay coil flyback and field wiring ESD events. IC Role / Device Role / Timing Role: Primary overvoltage shunt across input terminals, coordinated with series current-limiting resistor. Use Value: Withstands repeated 3000 W pulses without degradation, enabling >100,000 surge cycles in factory automation environments. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
Use Scenario: Suppresses back-EMF from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, activated within <1 ns of overvoltage onset. Use Value: Clamps 45 V nominal bus transients to safe levels for MOSFET drivers and gate drivers rated ≤80 V. |
Use Scenario: Guards AC-DC adapter primary-side rectifier output against lightning-induced surges on telecom site power feeds. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise clamping where fast response is critical. Use Value: 3000 W rating handles combination wave (1.2/50 μs + 8/20 μs) surges per IEC 61000-4-5 Level 4 without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K45CAHM3/57 | AEC-Q101 qualified variant with identical electrical specs; HM3 suffix indicates automotive-grade whisker testing and enhanced process controls | Required for new automotive designs; not necessary for commercial/industrial use where AEC-Q101 is not mandated | Select SMC3K45CAHM3/57 when automotive qualification documentation and traceability are contractually required |
| SMAJ45A | Lower 400 W peak pulse power, SMA package (smaller footprint), 45 V VWM but higher 110 V clamping voltage at rated current | Suitable for lower-energy transients; insufficient for 3000 W load-dump events common in 12 V/24 V vehicle systems | Choose SMAJ45A only for space-constrained consumer applications with <500 W surge exposure |
Compared with SMC3K45CA-M3/57, SMC3K45CAHM3/57 delivers identical protection performance with added automotive traceability, while SMAJ45A trades robustness for size - making the original SMC3K45CA-M3/57 optimal for high-energy industrial and legacy automotive deployments where cost and qualification alignment matter.
Availability
SMC3K45CA-M3/57 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and consumer appliance motor drives requiring stable component supply and long-term obsolescence management.
Supply support for SMC3K45CA-M3/57 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 SMC3KxxCA series targets high-power transient suppression in harsh environments, designed specifically for automotive, industrial, and telecom infrastructure where 3000 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What does the "M3/57" suffix mean in SMC3K45CA-M3/57?
The "M3" suffix indicates halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance, while "/57" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This configuration ensures compatibility with standard SMT pick-and-place equipment and meets environmental compliance requirements for commercial-grade applications.
Is SMC3K45CA-M3/57 suitable for automotive applications?
SMC3K45CA-M3/57 is not AEC-Q101 qualified - it carries the commercial-grade M3 suffix, not HM3. For automotive use, Vishay specifies SMC3K45CAHM3/57 as the qualified alternative. The SMC3K45CA-M3/57 may be used in non-safety-critical aftermarket or legacy systems where formal qualification is waived, but design-in requires validation per OEM requirements.
What is the maximum clamping voltage of SMC3K45CA-M3/57 under surge conditions?
The SMC3K45CA-M3/57 clamps to a maximum of 72.7 V when subjected to its rated peak pulse current of 41.3 A (10/1000 μs waveform). This value is guaranteed per Vishay's Electrical Characteristics table and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Can SMC3K45CA-M3/57 be mounted on the bottom side of a PCB using wave soldering?
No - Vishay explicitly states that SMC3K45CA-M3/57 is not recommended for PCB bottom side wave mounting due to thermal stress risks during soldering. It is approved for top-side reflow or wave soldering only, with strict adherence to J-STD-020 MSL Level 1 profile and maximum peak temperature of 260 °C.
How does SMC3K45CA-M3/57 differ from SMC3K45CAHM3/57 beyond qualification?
Both SMC3K45CA-M3/57 and SMC3K45CAHM3/57 share identical electrical parameters (VWM = 45 V, VBR = 50.0–55.3 V, VC ≤ 72.7 V), package (SMC), and RoHS/halogen-free status. The sole functional difference is AEC-Q101 qualification and associated process controls in the HM3 variant - no electrical or thermal performance distinction exists between the two for the same operating conditions.
SMC3K45CA-M3/57 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):
- 41.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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 (SMCJ)
SMC3K45CA-M3/57 FAQ
1.How can I place an order for SMC3K45CA-M3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K45CA-M3/57 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 SMC3K45CA-M3/57 reliable?
The price and inventory of SMC3K45CA-M3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K45CA-M3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K45CA-M3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K45CA-M3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K45CA-M3/57?
SMC3K45CA-M3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K45CA-M3/57 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 SMC3K45CA-M3/57?
For technical support, including SMC3K45CA-M3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K45CA-M3/57 requirements.
6.How does Aetrix verify that SMC3K45CA-M3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K45CA-M3/57 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 SMC3K45CA-M3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K45CA-M3/57?
All SMC3K45CA-M3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K45CA-M3/57, 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 SMC3K45CA-M3/57 part is unused and in its original packaging.
Return procedure for SMC3K45CA-M3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K45CA-M3/57 Tags
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