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Vishay General Semiconductor - Diodes Division SMC5K48CA-M3/I
- Part No.:
- SMC5K48CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K48CA-M3/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,632
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Product details
Overview
SMC5K48CA-M3/I 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 48 V standoff voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 77.4 V clamping voltage at 64.6 A (10/1000 μs), 5000 W peak pulse power, and AEC-Q101 qualification - deployed to protect MOSFETs and signal lines in automotive power electronics.
For engineers reviewing the SMC5K48CA-M3/I datasheet, SMC5K48CA-M3/I pinout, SMC5K48CA-M3/I application, or SMC5K48CA-M3/I equivalent, key selection criteria include clamping performance under 10/1000 μs transients, bidirectional polarity, MSL Level 1 reflow compatibility, and compliance with IEC 61000-4-2 ±30 kV ESD.
Technical Context
This TVS operates as a voltage-clamping device triggered by transient overvoltage events exceeding its reverse standoff threshold. Its silicon avalanche structure delivers sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of inductive switching spikes and lightning-induced surges on DC power rails and bidirectional data lines.
The device is rated for continuous operation from –55 °C to +175 °C junction temperature, with thermal resistance RthJA = 90 °C/W and RthJM = 4.0 °C/W. It meets UL 497B safety recognition (E136766), J-STD-020 MSL Level 1, and JEDEC JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuit. |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on margin above VWM. |
| VC @ IPPM (10/1000 μs) | 77.4 V at 64.6 A - Clamped voltage during standardized surge; determines maximum stress imposed on downstream components. |
| PPPM | 5000 W - Peak pulse power handling capability with 10/1000 μs waveform; supports robust protection against industrial transients. |
| TJ max. | +175 °C - Maximum junction temperature rating; enables use in under-hood automotive and high-ambient industrial environments. |
| ESD immunity | ±30 kV (IEC 61000-4-2 contact/air) - Withstands high-energy electrostatic discharge without degradation; eliminates need for external ESD stages. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no cathode band. Matte tin-plated leads, halogen-free, RoHS-compliant, and qualified to AEC-Q101.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical avalanche junction; accepts surge current in either polarity relative to cathode. |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical junction; completes low-impedance path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 5000 W (10/1000 μs) pulse rating | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) in compact SMC footprint. |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, TCT, and HTRB. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| UL 497B recognition (E136766) | Meets safety agency requirements for primary-side surge protection in industrial and telecom power supplies. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and gate drivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element across power rail inputs, absorbing >5000 W surges within nanoseconds. Use Value: Prevents MOSFET failure during ISO 7637-2 Pulse 5a (75 V, 100 ms) by limiting rail voltage to ≤77.4 V. |
Use Scenario: Shielding analog input channels of programmable logic controllers from field-wiring transients. IC Role / Device Role / Timing Role: Bidirectional shunt protector on ±10 V sensor interfaces, placed before signal conditioning amplifiers. Use Value: Maintains signal integrity under IEC 61000-4-4 EFT bursts (4 kV, 5 kHz) with <1 ns response and no latch-up risk. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered equipment front-end rectifiers and DC-DC converters. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V DC input, coordinated with upstream MOVs and fuses. Use Value: Limits let-through voltage to <80 V during 10/1000 μs surges, preserving 100 V-rated input capacitors and FETs. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Across-motor terminals to clamp inductive kickback during PWM commutation. Use Value: Extends motor driver IC lifetime by reducing repetitive overvoltage stress beyond 60 V ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-M3/86A | Lower PPPM (400 W), SMA package, unidirectional only, no AEC-Q101 qualification. | Limited to low-energy consumer-grade circuits; unsuitable for automotive or industrial surge standards. | Select only for cost-sensitive, non-automotive designs where 400 W clamping suffices and polarity is fixed. |
| SMCJ48CAHM3/I | Identical electrical specs and SMC package; HM3 suffix denotes AEC-Q101 qualification and enhanced reliability screening. | Same functional role but with extended automotive qualification scope (e.g., higher temperature cycling cycles). | Prefer SMCJ48CAHM3/I for new automotive designs requiring full AEC-Q101 documentation traceability. |
Compared with SMC5K48CA-M3/I, SMAJ48A-M3/86A offers lower surge capacity and lacks automotive qualification, while SMCJ48CAHM3/I provides identical protection performance with stricter automotive reliability validation - making it suitable for Tier-1 supply chain audits without layout change.
Availability
SMC5K48CA-M3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC power feeds requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge suppression.
Supply support for SMC5K48CA-M3/I 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, TVS devices, and optoelectronics with emphasis on reliability and high-power handling.
The SMC5KxxCA series was developed specifically for high-energy transient suppression in harsh-environment applications, targeting automotive, industrial, and telecom infrastructure where 5 kW surge capability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMC5K48CA-M3/I under a 10/1000 μs surge?
The SMC5K48CA-M3/I clamps to 77.4 V at 64.6 A under a 10/1000 μs waveform, as specified in the Vishay datasheet (Document Number: 87024). This value defines the maximum voltage seen by downstream components during standardized surge testing and is critical for ensuring protected ICs remain within absolute maximum ratings. The clamping performance is guaranteed across the full operating temperature range.
Is SMC5K48CA-M3/I suitable for automotive applications?
Yes, SMC5K48CA-M3/I is AEC-Q101 qualified and rated for junction temperatures up to +175 °C, making it suitable for under-hood and powertrain applications. It meets IEC 61000-4-2 ±30 kV ESD immunity and supports ISO 7637-2 load dump protection when used with appropriate coordination networks. The M3 suffix confirms halogen-free, RoHS-compliant, industrial-grade construction.
What does the "CA" suffix indicate in SMC5K48CA-M3/I?
The "CA" suffix in SMC5K48CA-M3/I denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. This distinguishes it from unidirectional variants (e.g., SMC5K48A-M3/I) and enables use on floating or AC-coupled signal paths where voltage polarity reversal is possible.
What is the thermal resistance of SMC5K48CA-M3/I?
The SMC5K48CA-M3/I has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W and junction-to-mount thermal resistance (RthJM) of 4.0 °C/W, measured per JEDEC standards on FR4 PCB with standard footprint. These values inform heatsinking requirements and derating curves for sustained surge duty cycles, especially in high-temperature ambient environments.
Does SMC5K48CA-M3/I have a cathode marking?
No, SMC5K48CA-M3/I does not have a cathode band or polarity marking because it is a bidirectional TVS diode. The device uses a symmetrical avalanche junction structure, so either terminal functions identically under reverse bias. Polarity identification is unnecessary during placement, simplifying automated assembly and reducing orientation-related defects.
SMC5K48CA-M3/I 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 64.6A
- 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)
SMC5K48CA-M3/I FAQ
1.How can I place an order for SMC5K48CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K48CA-M3/I 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 SMC5K48CA-M3/I reliable?
The price and inventory of SMC5K48CA-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K48CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K48CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K48CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K48CA-M3/I?
SMC5K48CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K48CA-M3/I 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 SMC5K48CA-M3/I?
For technical support, including SMC5K48CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K48CA-M3/I requirements.
6.How does Aetrix verify that SMC5K48CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K48CA-M3/I 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 SMC5K48CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K48CA-M3/I?
All SMC5K48CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K48CA-M3/I, 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 SMC5K48CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K48CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K48CA-M3/I Tags
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