Littelfuse HWB12 Sealed Power Distribution Modules
Littelfuse HWB12 Sealed Power Distribution Modules (PDMs) are hard-wired boxes featuring 12 cavities that accept 2.8mm fuse and relay components. These PDMs are ideal for accessory circuits and overflow circuits from a designer's main PDM. Littelfuse 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. Users can customize their circuitry utilizing direct wire-to-component connections that are crimped to the wire harness with grommets to seal the bottom of the module.Features
- 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
- Terminal position assurance locks (TPAs) give secondary locking protection of the wire leads, which helps keep 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 that functions as relay retention insert
- HWB18, HWB12, and 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
Applications
- Accessory circuits
- Overflow circuits
- Main unit on small vehicles
- Upfitting vehicle electrical systems
Specifications
- 30A per circuit maximum fuse rating
- 130A maximum continuous current
- 12 cavities
- -40°C to +105°C operating temperature range
- IP67/IP69K ingress protection
Additional Resources
Published: 2019-05-01
| Updated: 2025-04-29
