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1.3.1 Circuit Breakers

Overview

All CONSTANT bus loads protected by Mechanical Products Series 17 circuit breakers.

Location: Rear wheel well near CONSTANT bus bar

Circuit Breaker Specifications

Circuit Model Rating Reset Type Power Path Max Load Sizing
SwitchPros RCR-Force 12 Mechanical Products
(174-S2-150-2)		 150A Manual CONSTANT bus
└→ 150A CB
   └→ SwitchPros RCR-Force 12		 ~100A (all lighting outputs on) 150% of max load
SafetyHub 150 (Recovery) Mechanical Products
(174-S2-150-2)		 150A Manual CONSTANT bus
└→ 150A CB
   └→ SafetyHub 150		 ~100A (ARB 90A + Winch Trigger 10A) Future-proofed to SafetyHub max capacity
BODY PDU Mechanical Products
(174-S2-100-2)		 100A Manual CONSTANT bus
└→ 100A CB
   └→ BODY PDU		 ~54A max (radio 16A, USB 13A, camera 10A, seats 10A peak) 185% of max load (future expansion)
Fusion Apollo Amp Blue Sea
(187-100A)		 100A Manual CONSTANT bus
└→ 100A CB
   └→ Fusion MS-AP61800		 78A max (all channels full output) 128% of max load

Wire Sizing for CB Protection

CONSTANT bus outputs use 2 AWG (130A @ 20°C) for SwitchPros, SafetyHub, and BODY PDU. Fusion Amp uses 4 AWG (95A @ 20°C) sized for 100A CB.

Mechanical Products Series 17 (3 units):

  • Type: Surface mount
  • Reset: Manual (Type III - push to reset)
  • Terminals: 3/8"-16 studs (S2 configuration)
  • Dimensions: 3.39" L × 1.9" W (per unit)
  • Ratings: 48V DC (20-150A), 30V DC (175-200A), 14V DC (225-300A)
  • Standards: Marine-rated (SAE J1171, ABYC E-11, UL1500, IP67, MIL-STD-202)
  • Mounting: Rear wheel well near battery

Blue Sea 187-Series (1 unit - Fusion Amp):

  • Type: Surface mount
  • Reset: Manual
  • Terminals: 5/16" (M8) studs
  • Dimensions: 3.44" H × 2.32" W × 1.8" D
  • Rating: 5000A interrupt @ 12V DC
  • Standards: Ignition protected, waterproof

Space Requirements: 4 CBs in 2×2 arrangement with wiring clearance for 2-4 AWG cables: ~8" × 10" (~80 sq in)