© 2016 Littelfuse Commercial Vehicle Products
Rev: 030216
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Commercial Vehicle Product Datasheet
HWB18 SEALED POWER DISTRIBUTION MODULE
Compact Hard-Wired PDM for 280 Style Components
Specifications Overview
Max Fuse Rating: 30A per circuit
Max Continuous Current: 200A
Number of Cavities 18
Operating Temp: -40 °C to +105 °C
Ingress Protection: IP67/IP69K
Applications
• Accessory circuits
• Overflow circuits
• Main unit on small vehicles
Web Resources
Download 2D print and technical resources at:
littelfuse.com/hwb18
Description
The HWB18 Compact Hard-Wired Box features 18 cavities
that accept 2.8mm fuse and relay components and is the
perfect fit for accessory circuits and overflow circuits from
your main Power Distribution module. The HWB18 can hold
plug-in components including MINI fuses, MINI format circuit
breakers, 4-pin single throw relays, and 5-pin double throw
relays. The HWB18 features durable construction, an IP67/
IP69K rating, and a compact size. The user can customize
their own circuitry utilizing direct wire-to-component
connections which are crimped to the wire harness with
grommets to seal the bottom of the module.
Features and Benefits
• Cover latches keep the cover sealed and securely in place.
• Accepts any mini (280 style) circuit protection component.
• Compact size allows the unit to be installed in vehicles
with limited space.
• Ideal for accessory circuits, overflow circuits from main or
as a main module on smaller vehicles.
• IP67/IP69K sealed units can be installed virtually anywhere
on the vehicle and stands up to road splash and salt spray.
• TPAs (terminal position assurance locks) give secondary
locking protection of the wire leads, which help keeps
leads securely in place.
• Wires plug into the back of the unit using industry-
standard Delphi Metri-Pack Series 280 tanged terminals.
• Available with or without steel mounting bracket. Module
snaps into bracket, and is held at 30° angle or 90° angle
(bracket dependent) to allow easy viewing and servicing
• Tethers available to prevent loss of cover during service.
• Optional grid on inside cover available; functions as relay
retention insert
• HWB18, HWB12 & HWB6 share the same mounting
bracket so electrical system modification can be performed
withoout bracket or sheet metal alterations.
PART NUMBER DESCRIPTION
868-066 30° angle mounting bracket
883-084 TPA
868-063 Base
901-106 Cover seal
873-032 Cover
Ordering Information
Accessories and Service Parts
PART NUMBER
COVER
TPA GASKET
MOUNTING
BRACKET
BLACK CLEAR
PDM31001ZXM • • • 30°
PDM31002ZXM • • •
PDM31003ZXM • •
Complete assembly includes: cover, base, gasket
TPA: Terminal Position Assurance secondary locks for wire terminals
