Series 31m - mVEC

mVEC2 Severe Service Vehicle Electrical Center (ssVEC)

Multiplexed Vehicle Electrical Center (mVEC)

The multiplexed Vehicle Electrical Center (mVEC) offers economical CAN Network oversight for high power circuits in vehicle power distribution. The mVEC is rated at 200 Amps. The mVEC may be configured to provide various OEM circuit protection and switching functions, using industry standard fuses, relays and breakers, with the status and control of each circuit accessible through J1939 CAN open messages. The mVEC is based on proven and patented technology and is suited for the most demanding transportation vehicle applications.

Features & Benefits
The mVEC acts as a slave module on a J1939 network communicating via the vehicle data bus with the master controller. Functionality as a node in existing vehicle networks is available today with plans for limited stand-alone capability planned for the future. Capabilities include relay control as well as diagnostic reports for fuses, relays and circuit breakers via the vehicle's CAN bus. Both 12 & 24V functionality is available along with high-side & low-side control.

Technical documents: 

mVEC Data Sheet

mVEC User Manual


Catalog Number mVEC
Capacity • 200A maximum rating • 30A per output pin • Maximum of 12 relays and/or 32 fuses, or various combinations thereof (unique design configurations may be required)
Materials • Housing and connector cavities: 94V0 rated thermoplastic • Internal power grid: tin-plated copper • CAN circuit board: conformally coated
Ratings • Operating temperature ratings: -40°C to 85°C [Consult factory for higher temp versions (up to 105°C)] • Ingress Protection; IP66 equivalent (direct high pressure spray) • Foot torque rating: 60 in-lbs w/out compression limiters, 200 to 300 in-lbs with compression limiters
Options 1. Mounting: compression limiters on mounting feet 2. Labeling to customer specifications 3. Stuffed (with/without components including, but not limited to: fuses, relays, diodes, circuit breakers, fuse puller) 4. Customized circuit layouts, standard and custom CAN messages
Connections Output: Standard Eaton VEC connectors • 8-way, colored/keyed, sealed connectors • 30A max per terminal • Accepts Packard Metri-Pack 280 Series terminals (tanged/tangless); Input: • Studded input option: supports two M8 input power studs for DC power into the VEC power grid • Connectorized: accepts up to 2 Eaton 32004 VEC connectors (2 terminal, colored/keyed, sealed connectors) • 60A max per terminal, providing power to the VEC Power Grid; uses Packard 800 series terminals CAN: • Uses AMP SSC 12-position sealed connector • CAN connector provides CAN signaling, power, ground, addressing, auxiliary relay control, and connections to mVEC 'smart' layer


  • Acts as a slave module on a J1939/CAN open network, communicating via the vehicle data bus with the master controller
  • Functions as a node in an existing vehicle J1939/CAN open multiplexing network
  • Controls relays via direction of J1939 CAN bus
  • Reports status of relays and fuses each second to the  J1939 CAN bus, indicating any blown fuse or failed relay
  • Supports both 12V and/or 24V electrical requirements
  • Has two standard designs available
             31M-000-1:  8-relays with or w/o HSD
             31M-300-0:  12-relays with or w/o HSD
  • Is capable of custom designs with differing configurations of  relays, fuses, circuit breakers, etc. per customer requirements