Features and Benefits

  • High Voltage Dual SPST, Current Sharing Allowed
  • 5% Accurate Analog Current Monitor Outputs
  • Adjustable Circuit Breaker Thresholds to 1.2A
  • Filtered (50μs) Primary OC Threshold
  • Fast (2μs) Secondary OC Threshold
  • 75mΩ Integrated Switches
  • Automatic Inrush Control
  • Short-Circuit Protection
  • Precision Enable Inputs
  • Open-Drain, Ready Status Outputs
  • 16-Lead 3mm × 3mm LQFN and 12-Lead (Skipped Lead) 3mm × 4mm LQFN

Product Details

The LTC4249 dual electronic circuit breaker (ECB) provides independent overcurrent protection to a pair of loads. Each channel has a precision enable input, current monitor output and ready status output. A single resistor configures the ECB threshold. If either channel detects an overcurrent condition, the corresponding breaker disconnects the input from the load.

After a circuit breaker event, the open-drain RDY status output pulls low and the ECB latches off. Toggling the enable input turns the ECB back on after a 1 second cooloff period. An infinite retry option(–2) is also available. The cool-off timer, overtemperature sensor, short-circuit detector and inrush controller prevent operation outside the safe operating area of the circuit breakers.

Precision enable inputs, ready outputs and analog current monitor outputs permit voltage sequencing and closed loop bias current control applications. ECB channels may be paralleled as needed. Load isolation and reverse current detection applications are also possible.


  • 5G mMIMO PA Array Protection
  • Industrial Safety
  • Condition Monitoring
  • Relay Replacement
  • Load Switching

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.