High-Voltage Reverse-Input-Capable 4–20mA Current Loop Protector

Industry's First Integrated 4mA to 20mA Current Loop Protector for Industrial Analog Input Modules

Please check latest availability status for a specific part variant.


The MAX14626 current loop protector features a current-limit switch to prevent damage to the analog input module from sensor failure. The current-limit switch features a 25Ω (typ) on-resistance and operates from a +2.3V to +36V input voltage range. The accurate current limit is set to 30mA, making the part ideal for protecting the sensor reading devices.

The MAX14626 handles an overcurrent event in a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse-input blocking to protect from being reverse connected into the sensor.

The device is available in a tiny 6-pin (3mm x 3mm), TDFN exposed pad package and is specified over the -40°C to +85°C extended temperature range.
MAX14626: Typical Operating Circuit MAX14626: Typical Operating Circuit Enlarge+

Key Features

  • High Performance
    • Low On-Resistance 25Ω (typ)
    • Accurate ±10% Current Limit
    • +2.3V to +40V Wide Supply Voltage Range
    • Low Operating Current
    • Ultra-Low Temperature Coefficient
  • Robust Protection for Sensors
    • Avoids Power Dissipation Issues Compared to Discrete Solutions
    • Thermal Shutdown
    • Reverse Input Protection
  • Saves Space in Compact Systems
    • Eliminates Need for Discrete PTC Poly Switch, Zener Diodes, and Resistors
    • 3mm x 3mm, 6-Pin TDFN Package


  • Industrial Current Loop Control
Part NumberPower SwitchesCurrent Limit
Current Limit
Fault IndicatorCurrent Limit Accuracy
Current Limit Set ByLowest Adj. Setting
Oper. Temp.
minmaxtypminmaxSee Notes
MAX14626 13030No10Preset0.03252.340-40 to +85
$0.61 @1k
See All Current Limit and USB Power Switches (83)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX14626EVKIT: Evaluation Kit for the MAX14626

Technical Documents

User Guide 6207 MAXREFDES46# Quickstart Guide

Quality and Environmental Data

Product Reliability Reports: MAX14626.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX14626

CAD Symbols and Footprints

  • MAX14626ETT+
  • MAX14626ETT+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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    Environmental Management System >


    Related Resources

    Type ID PDF Title
    User Guide 6207 MAXREFDES46# Quickstart Guide