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Vishay General Semiconductor - Diodes Division SMC5K48A-M3/H
- Part No.:
- SMC5K48A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K48A-M3/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
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Product details
Overview
SMC5K48A-M3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features 5000 W peak pulse power (10/1000 μs), 48 V stand-off voltage (VWM), and clamps to 77.4 V at 64.6 A peak pulse current - ideal for safeguarding MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive systems.
For engineers reviewing the SMC5K48A-M3/H datasheet, SMC5K48A-M3/H pinout, SMC5K48A-M3/H application, or SMC5K48A-M3/H equivalent, key selection criteria include its 48 V VWM rating, 77.4 V clamping voltage at 64.6 A, AEC-Q101 qualification status (not applicable to this variant), UL 497B recognition, and SMC package thermal performance with RthJA = 90 °C/W.
Technical Context
This TVS diode operates as a unidirectional clamping device, responding within nanoseconds to voltage surges exceeding its reverse stand-off voltage (VWM = 48 V). Its breakdown voltage range (53.3–58.9 V at 1 mA) ensures reliable triggering before downstream components reach stress limits.
The device delivers 5000 W peak pulse power under 10/1000 μs waveform and sustains 40 kW under 8/20 μs surge conditions. Its low incremental surge resistance and excellent clamping ratio (VC/VWM ≈ 1.61) minimize let-through energy during transient events across consumer, industrial, and telecom applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for protected circuitry. |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - guaranteed breakdown threshold ensuring consistent turn-on behavior across temperature and unit variation. |
| VC @ IPPM | 77.4 V at 64.6 A (10/1000 μs) - clamping voltage limiting peak stress on downstream components during standardized surge events. |
| PPPM | 5000 W (10/1000 μs) - peak surge energy handling capacity; determines survivability against common inductive load transients. |
| Junction temp | -55 °C to +150 °C - operational range enabling use in under-hood automotive and high-temperature industrial environments. |
| ESD immunity | 30 kV HBM (contact & air) per IEC 61000-4-2 - protects against electrostatic discharge during handling and system operation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with low-inductance connection to minimize clamping overshoot. |
| Cathode | Current exit terminal during reverse-biased clamping; connected to protected line (e.g., signal, power rail). | Acts as the "input" for transient suppression; polarity marking ensures correct orientation to avoid catastrophic failure. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power | 5000 W (10/1000 μs) - enables protection against high-energy transients from relay coil collapse or motor commutation without degradation. |
| Clamping ratio | VC/VWM = 1.61 - tight voltage control reduces overvoltage stress on downstream ICs compared to higher-ratio suppressors. |
| Thermal resistance | RthJA = 90 °C/W - supports stable operation on standard FR4 PCBs with 2 oz copper; enables predictable derating above 25 °C ambient. |
| UL 497B recognition | File E136766 - validates compliance with safety standards for telecom and data line protection applications requiring certified components. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs and body control modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before they reach LDOs and microcontrollers. Use Value: Withstands 5000 W pulses and operates up to +150 °C junction temperature, meeting harsh under-hood environmental requirements. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors from ESD and cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before entering signal conditioning amplifiers. Use Value: 30 kV HBM ESD rating and sub-1 ns response ensure immunity to field-deployed electrostatic events without signal distortion. |
| Telecom Data Line Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Paired unidirectional TVS on differential pairs to clamp common-mode transients while preserving signal integrity. Use Value: UL 497B certification and 77.4 V clamping enable compliance with GR-1089-CORE and IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Front-end protection of AC-DC adapters against mains-borne surges and switching noise from nearby SMPS. IC Role / Device Role / Timing Role: Primary-stage TVS across bulk capacitor input to absorb line-to-line and line-to-ground transients. Use Value: 48 V VWM aligns with 36–52 V DC bus ranges in universal-input adapters; 5000 W rating handles IEC 61000-4-5 2 kV/12 Ω tests. |
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-M3/87A | Lower PPPM (400 W vs. 5000 W); SMA package (smaller footprint, higher RthJA = 150 °C/W). | Suitable for lower-energy transients (e.g., board-level ESD only); not rated for industrial load-dump or telecom surge testing. | Select when space-constrained layouts prioritize size over surge energy handling. |
| SMCJ48A-M3/H | Same SMC package and VWM, but higher PPPM (1500 W) and lower VC (77.0 V at 65.1 A); not UL 497B recognized. | Valid for general-purpose industrial protection where UL certification is not mandated; lacks telecom safety approval. | Choose when cost sensitivity outweighs need for UL 497B or maximum 5000 W capability. |
Compared with SMC5K48A-M3/H, SMAJ48A-M3/87A offers compactness at the expense of surge robustness, while SMCJ48A-M3/H provides mid-tier power handling without UL safety listing - making SMC5K48A-M3/H the optimal choice for high-reliability, certified front-end protection.
Availability
SMC5K48A-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom data line protection, and consumer power adapter designs requiring stable component supply and long-term manufacturability.
Supply support for SMC5K48A-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMC5KxxA series was developed for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom systems where robustness, safety certification, and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the SMC5K48A-M3/H under standard test conditions?
The SMC5K48A-M3/H clamps to 77.4 V at 64.6 A peak pulse current under the 10/1000 μs waveform, as specified in the Vishay datasheet. This value represents the maximum voltage seen across the device during a standardized surge event and directly determines the overvoltage stress imposed on protected circuitry. The SMC5K48A-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K48A-M3/H AEC-Q101 qualified?
No, the SMC5K48A-M3/H is not AEC-Q101 qualified. According to the Vishay datasheet, AEC-Q101 qualification applies only to the HM3 suffix variants of SMC5K10A through SMC5K20A. The SMC5K48A-M3/H carries the M3 suffix, indicating halogen-free, RoHS-compliant construction but no automotive qualification. For AEC-Q101 compliance, engineers should consider SMC5K20AHM3_A/H instead.
What does the "-M3/H" suffix indicate in SMC5K48A-M3/H?
The "-M3/H" suffix in SMC5K48A-M3/H specifies halogen-free, RoHS-compliant packaging (M3) and 7-inch plastic tape-and-reel delivery (H). The M3 designation confirms compliance with JESD201 Class 2 whisker resistance and UL 94 V-0 flammability. The /H denotes a base quantity of 850 units per reel - a standard logistics configuration for automated SMT assembly.
How does the SMC5K48A-M3/H compare to standard Zener diodes for transient suppression?
The SMC5K48A-M3/H is engineered specifically for high-energy transient suppression, offering 5000 W peak pulse power and sub-nanosecond response - far exceeding the surge capability and speed of general-purpose Zener diodes. Unlike Zeners, it features optimized junction design for low dynamic impedance and stable clamping under repetitive surges. The SMC5K48A-M3/H also meets UL 497B and IEC 61000-4-2 ESD standards, which typical Zeners do not.
What is the thermal resistance junction-to-ambient (RthJA) for the SMC5K48A-M3/H?
The SMC5K48A-M3/H has a thermal resistance junction-to-ambient (RthJA) of 90 °C/W when mounted on a standard FR4 PCB with 2 oz copper, per JEDEC 51-2A. This value enables accurate thermal derating above 25 °C ambient temperature and informs heatsinking decisions. At 150 °C maximum junction temperature, the device supports continuous operation up to ~110 °C ambient under zero-power conditions, with appropriate surge duty cycle management.
SMC5K48A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K48A-M3/H FAQ
1.How can I place an order for SMC5K48A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K48A-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 SMC5K48A-M3/H reliable?
The price and inventory of SMC5K48A-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 SMC5K48A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K48A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K48A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K48A-M3/H?
SMC5K48A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K48A-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 SMC5K48A-M3/H?
For technical support, including SMC5K48A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K48A-M3/H requirements.
6.How does Aetrix verify that SMC5K48A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K48A-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 SMC5K48A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K48A-M3/H?
All SMC5K48A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K48A-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 SMC5K48A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K48A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K48A-M3/H Tags
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