Littelfuse HLMUDLAAA is a voltage monitoring relay with a wide range of features. It has a maximum load rating of 10A resistive at 240V and 8A resistive at 277V. The relay has screw terminal connections for easy wiring and supports input voltages up to 550V. It automatically detects line frequencies and has adjustable trip and reset voltage settings. It provides surge protection and has a response time of ≤200ms for phase loss and phase reversal. The relay also offers adjustable trip delay and restart delay ranges. It is suitable for use in 3-phase delta or WYE systems and has a humidity rating of 95% non-condensing. Overall, the HLMUDLAAA is a reliable and versatile voltage monitoring relay for various applications.