© 2017 Littelfuse Commercial Vehicle Products
Rev: 101817
littelfuse.com 1 of 2
Product Datasheet
HD SERIES BATTERY COMBINERS
Intelligent Relay Shares Charge Voltage Between Two Battery Banks
Specifications Overview
Voltage Rating: 880051 – 12V DC
880055 – 24V DC
Max Continuous Current: 300A (1x 4/0 input/output cable)
Inrush Current Rating: 1500A (1x 4/0 input/output cable)
Ingress Protection: IP67/IP69K
Operating Temp: -40°C to + 85°C
Web Resources
Download technical resources at:
littelfuse.com/HD-Combiner
Datasheet Replaces Hotfeed Number D-652
Description
Combines battery banks when one is being actively charged,
and disconnects them when charge voltage is removed.
Supports high-amp intermittent or continuous current loads.
Very low quiescent current draw (in On or Off states) due to
bi-stable mechanism. Sealed to IP67 & IP69K
Features and Benefits
• Optional remote On or Off switching override enables
emergency override for starting from an auxiliary
battery, or allows house/cab functions to operate longer
in critical applications.
• Supports high current loads such as large inverter loads.
Operates under high temperature conditions. Compact
unit is an ideal choice for applications in heavy vehicles,
construction, agriculture, military, mining and agriculture.
• Eliminates the cost of routing heavy copper cables to
mechanical-only battery switches. Battery combiner can
be conveniently located between battery banks, and
remote switch can be conveniently located in the cab or
wherever required, using only small gauge wiring.
• Optional start isolation input ensures isolation of auxiliary
loads from engine cranking voltage spikes and sags.
• Optional ‘Engine On’ input eliminates relay cycling caused
by voltage drop along cables.
Ordering Information
PART NUMBER DESCRIPTION
880051 HD Battery Combiner 12V DC
880055 HD Battery Combiner 24V DC
PN 880051
© 2017 Littelfuse Commercial Vehicle Products
Rev: 101817
littelfuse.com 2 of 2
Product Datasheet
Specifications
880051 & 880055
Max Continuous Current Rating 300A (1x 4/0 input/output cable)
Inrush Current Rating (10 Seconds) 1500A (1x 4/0 input/output cable)
Control Current 40mA (when not changing state)
6A at 12V DC / 3A at 24V DC (when changing state, 50msec)
Relay Contact Position
Combine (30 Seconds) 13.5V DC at 12V / 27.0V DC at 24V
Combine (90 Seconds) 13.1V DC at 12V / 26.0V DC at 24V
Open (10 Seconds) 12.3V DC at 12V / 24.7V DC at 24V
Open (30 Seconds) 2.7V DC at 12V / 25.5V DC at 24V
Open High 16.5V DC at 12V / 32.4V DC at 24V
Connector Deutsch 6-position DTM
Mounting Hardware M5 or #10
Terminal Hardware 3/8” (Accepts M10 Terminals)
Temperature Range -50°C to + 105°C
Humidity 0-95% RH
Shock 10G
Vibration 8G
Ingress Rating IP67/IP69K
Weight 1.69lb (0.77kg)
Ignition Protection Meets ISO 8846 & SAE J1171
Recommended Rocker Switch
Type Sustained SPDT On-Off-On
HD SERIES BATTERY COMBINERS
Configurations
Visit Littelfuse.com for the most up-to-date product information. Littelfuse products are designed for specific applications and should not be used for any purpose (including, without limitation, automotive
applications) not expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in
applicable Littelfuse product documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable
Littelfuse product documentation.
Datasheet Replaces Hotfeed Number D-652
