© 2017 Littelfuse Commercial Vehicle Products
Rev: 101217
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Commercial Vehicle Product Datasheet
HWB12 SEALED POWER DISTRIBUTION MODULE
Compact Hard-Wired PDM for 280 Style Components
Specifications Overview
Max Fuse Rating: 30A per circuit
Max Continuous Current: 130A
Number of Cavities 12
Operating Temp: -40 °C to +105 °C
Ingress Protection: IP67/IP69K
Applications
• Accessory circuits
• Overflow circuits
• Main unit on small vehicles
• Upfitting vehicle electrical systems
Web Resources
Download 2D print and technical resources at:
littelfuse.com/hwb12
Description
The HWB12 Compact Hard-Wired Box features 12 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 HWB12 can hold
plug-in components including MINI fuses, MINI format circuit
breakers, 4-pin single throw relays, and 5-pin double throw
relays. The HWB12 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
• AssureLatch™ yellow positive-sealing latches keep the
cover securely in place while allowing for fast service.
• Accepts any MINI (280 style) fuses, circuit breakers
or relays.
• Compact size allows the unit to be installed in vehicles
with limited space.
• Ideal for accessory circuits, overflow circuits from main
• 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 TE Connectivity MCP terminals.
• Tethers available to prevent loss of cover during service.
• Optional foam on inside cover available; functions as relay
retention insert
• HWB18, HWB12 & HWB6 share the same mounting
bracket so electrical system modification can be
performed without bracket or sheet metal alterations.
• A UL certification for this fuseholder means it can be used
as a component in material handling and electric-battery-
powered industrial truck applications with confidence that
it meets the requirements of UL 583 standards.
PART NUMBER
COVER
AssureLatch™
MOUNTING
BRACKET
BLACK CLEAR
PDM33001ZXM • •
PDM33002ZXM • • •
PDM33003ZXM • • Straight
PDM33004ZXM • • • Straight
PART NUMBER DESCRIPTION
868-094 Base
873-021-001 Cover in clear
873-021-002 Cover in black (UR)
901-326 Silicone seal
883-088 1 pcs. AssureLatch™ with thumb release
883-087 TPA
890009470 Tether
901-327 Foam insert
868-964 90° angle mounting bracket
868-068 30° angle mounting bracket
Ordering Information
Accessories and Service Parts
UR file number: AU6325
TPA: Terminal Position Assurance secondary locks for wire terminals
