New Product Sales Sheet
HD Series Bi-Stable
Battery Combiners
Intelligent relay shares charge voltage between two battery banks
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
Ordering Information
Part No.
HD Battery Combiner 12V DC
HD Battery Combiner 24V DC
Remote control rocker switch
Features & 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.
Littelfuse Commercial Vehicle Products
D-652 Rev A
880051 & 880055
Max continuous current rating
300A (1x 4/0 input/output cable)
Max inrush current rating (10 sec)
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 sec)
13.5V DC at 12V / 27.0V DC at 24V
Combine (90 sec)
13.1V DC at 12V / 26.0V DC at 24V
Open (10 sec)
12.3V DC at 12V / 24.7V DC at 24V
Open (30 sec)
12.7V DC at 12V / 25.5V DC at 24V
Open high
16.5V DC at 12V / 32.4V DC at 24V
Deutsch 6-position DTM
Mounting hardware
M5 or #10
Terminal hardware
3/8” (accepts M10 terminals)
Temperature range
-50°C to 105°C
0-95% RH
10 G
Ignition protection
SAE J1171 and ISO 8846
1.69lb (0.77kg)
Ingress rating
IP67 & IP69K
880093 Rocker Switch
Sustained SPDT On-Off-On
Temperature range
-40°C to 85°C
Mounting cutout
1.45” x 0.83”
LED rating
100,000 hrs half-life
Ingress rating
Remote LED
Start isolation input