Series 15300 - RTMR (Rear terminal mini fuse & relay)
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Series 15300 - RTMR (Rear terminal mini fuse & relay)

The Rear Terminal Mini Fuse and Relay (RTMR) provides efficient power distribution in a rugged, compact form for commercial vehicle solutions. The 15300RTMR offers a weather resistant enclosure (IP66) for various mini (2.8mm) blade components when cover, cable seals and cavity plugs are installed. It is available with various degrees of internal electrical busing, custom labels and hardware configurations in order to meet customers' needs. 


  • Input terminal rating: M6 input studs on bussed/partially bussed inputs. 80A max input on bussed fuse side, 80A max input on bussed relay side.
  • Output terminal rating: 2.8mm blade terminals (30A max per terminal), temperature dependent
  • Temperature rating: -40°C (-40°F) to 125°C (260°F) - rating on PDM
  • Materials: 94V-0 thermoplastic housing, tin-plated copper internal bussing, bright nickel-plated brass studs (on bussed versions)
  • Termination: Delphi Packard Metri-Pack® 280 Series terminals (sealed/tangless).* Delphi Packard 280 Series cavity plugs are installed where wires are not used.* Accepts 12-22 AWG wire sizes.
  • Input stud torque rating: 50in-lbs max
  • Mounting torque rating: #10-32 or M5 threaded inserts; 24in-lbs max
  • Ingress protection rating: IP66-IEC 60529 - valid when properly installed with cover, sealed terminals and cavity plugs


  • Input terminal stud end caps: Protective silicone end caps available for studded versions
  • Mounting: Mounting brackets available for surface-mounting RTMR
  • Plated steel: B028-7021-O
  • Stainless steel: B028-7021-P
  • Labels: Consult factory for custom label options
  • Replacement accessories: Consult factory for available service parts
  • Cover marking: Laser etching on inside, outside or both
  • Cover options: Two heights (fuses only or relays/circuit breakers)
  • Latch position assurance: 15300-LP