Carling Technologies
Marine electrical switches, circuit breakers, ELCIs, battery disconnects, and digital switching systems from a Littelfuse brand.
Carling Technologies is a Littelfuse brand and a leading manufacturer of marine switching and circuit-protection products. Its marine lineup includes Contura rocker switches, hydraulic-magnetic and thermal circuit breakers, equipment leakage circuit interrupters (ELCIs), battery disconnect switches, and digital power-management systems for recreational, commercial, and specialty vessels.
Products from Carling Technologies
192 products
Carling TechnologiesCarling C-Series CA2 15A Double-Pole DC UL 489 Circuit Breaker
15A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-615-321-BG, 125V DC.
SKU CB-CA2-UL-DC-15A
$84.15
Carling TechnologiesCarling C-Series CA2 15A Double-Pole Supplementary Circuit Breaker
15A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-615-321-C.
SKU CB-CA2-15AMP
$67.50
Carling TechnologiesCarling C-Series CA2 1A 120/240V AC 2-Pole UL 489 Circuit Breaker
1A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-410-321-CG.
SKU CB-CA2-UL-AC120/240-1A
$84.15
Carling TechnologiesCarling C-Series CA2 1A Double-Pole DC UL 489 Circuit Breaker
1A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-410-321-BG, 125V DC.
SKU CB-CA2-UL-DC-1A
$84.15
Carling TechnologiesCarling C-Series CA2 20A 120/240V AC 2-Pole UL 489 Circuit Breaker
20A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-620-321-CG.
SKU CB-CA2-UL-AC120/240-20A
$84.15
Carling TechnologiesCarling C-Series CA2 20A Double-Pole DC UL 489 Circuit Breaker
20A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-620-321-BG, 125V DC.
SKU CB-CA2-UL-DC-20A
$84.15Carling C-Series CA2 20A Double-Pole Supplementary Circuit Breaker
20A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-620-321-C.
SKU CB-CA2-20AMP
$67.50
Carling TechnologiesCarling C-Series CA2 25A Double-Pole DC UL 489 Circuit Breaker
25A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-625-321-BG, 125V DC.
SKU CB-CA2-UL-DC-25A
$84.15Carling C-Series CA2 25A Double-Pole Supplementary Circuit Breaker
25A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-625-321-C.
SKU CB-CA2-25AMP
$67.50
Carling TechnologiesCarling C-Series CA2 30A 120/240V AC 2-Pole UL 489 Circuit Breaker
30A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-630-321-CG.
SKU CB-CA2-UL-AC120/240-30A
$84.15
Carling TechnologiesCarling C-Series CA2 30A Double-Pole DC UL 489 Circuit Breaker
30A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-630-321-BG, 125V DC.
SKU CB-CA2-UL-DC-30A
$84.15
Carling TechnologiesCarling C-Series CA2 40A 120/240V AC 2-Pole UL 489 Circuit Breaker
40A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-640-321-CG.
SKU CB-CA2-UL-AC120/240-40A
$84.15
Carling TechnologiesCarling C-Series CA2 40A Double-Pole DC UL 489 Circuit Breaker
40A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-640-321-BG, 125V DC.
SKU CB-CA2-UL-DC-40A
$84.15Carling C-Series CA2 40A Double-Pole Supplementary Circuit Breaker
40A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-640-321-C.
SKU CB-CA2-40AMP
$67.50
Carling TechnologiesCarling C-Series CA2 50A 120/240V AC 2-Pole UL 489 Circuit Breaker
50A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-650-321-CG.
SKU CB-CA2-UL-AC120/240-50A
$84.15
Carling TechnologiesCarling C-Series CA2 50A Double-Pole DC UL 489 Circuit Breaker
50A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-650-321-BG, 125V DC.
SKU CB-CA2-UL-DC-50A
$84.15Carling C-Series CA2 50A Double-Pole Supplementary Circuit Breaker
50A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-650-321-C.
SKU CB-CA2-50AMP
$67.50
Carling TechnologiesCarling C-Series CA2 5A 120/240V AC 2-Pole UL 489 Circuit Breaker
5A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-450-321-CG.
SKU CB-CA2-UL-AC120/240-5A
$84.15
Carling TechnologiesCarling C-Series CA2 5A Double-Pole DC UL 489 Circuit Breaker
5A 2-pole Carling C-Series CA2 UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-14-450-321-BG, 125V DC.
SKU CB-CA2-UL-DC-5A
$84.15Carling C-Series CA2 60A Double-Pole Supplementary Circuit Breaker
60A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-660-321-C.
SKU CB-CA2-60AMP
$67.50
Carling TechnologiesCarling C-Series CA2 7.5A 120/240V AC 2-Pole UL 489 Circuit Breaker
7.5A 2-pole Carling C-Series CA2 120/240V AC UL 489 listed and CSA certified circuit breaker, MPN CA2-B0-24-475-321-CG.
SKU CB-CA2-UL-AC120/240-7.5A
$84.15Carling C-Series CA2 70A Double-Pole Supplementary Circuit Breaker
70A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-670-321-C.
SKU CB-CA2-70AMP
$67.50Carling C-Series CA2 80A Double-Pole Supplementary Circuit Breaker
80A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-680-321-C.
SKU CB-CA2-80AMP
$67.50Carling C-Series CA2 90A Double-Pole Supplementary Circuit Breaker
90A 2-pole Carling C-Series CA2 UL 1077 recognized and CSA accepted supplementary protector, MPN CA2-B0-34-690-321-C.
SKU CB-CA2-90AMP
$67.50
Choose Carling switches and circuit protection
Match each component to the vessel's system voltage, circuit type, continuous and interrupt ratings, pole configuration, trip curve, actuator style, and environmental requirements. For replacement switches, also verify the cutout, terminal arrangement, lamp voltage, legend, and maintained or momentary action.
Ask about product compatibilityMarine controls built around the complete circuit
A switch or breaker must match both the electrical load and the installation. Review conductor protection, available fault current, leakage-protection requirements, panel fit, environmental exposure, and applicable marine standards before selecting a replacement or designing a new panel.
- Contura rocker switches in maintained and momentary circuit configurations
- Hydraulic-magnetic and thermal circuit breakers for AC and DC applications
- ELCIs for shore-power leakage protection at the vessel
- Battery disconnects and digital switching for onboard power control
Frequently asked questions
What does Carling Technologies make for boats?
Carling Technologies manufactures marine rocker switches, toggle and pushbutton controls, hydraulic-magnetic and thermal circuit breakers, equipment leakage circuit interrupters, battery disconnect switches, power distribution equipment, and digital switching systems.
How do I identify a replacement Carling rocker switch?
Check the complete part number and confirm the switch series, pole and throw configuration, maintained or momentary action, terminal arrangement, actuator and legend, lamp voltage, electrical ratings, and panel cutout. Similar-looking Contura switches can have different internal circuits.
What is the difference between a marine circuit breaker and an ELCI?
A circuit breaker protects conductors and equipment against overcurrent. An ELCI also monitors current imbalance between conductors and disconnects shore power when leakage exceeds its trip threshold. The required ratings and installation location must be verified for the vessel.
Is Carling Technologies part of Littelfuse?
Yes. Littelfuse completed its acquisition of Carling Technologies in 2021, and Carling Technologies is presented as a Littelfuse brand.
Need a quote on Carling Technologies gear?
Tell us what you're building. Our team will spec the right kit for your install and send a written quote.
Why buy from us
We carry this brand because it earns its place on the boat.
Stocked for marine builds
We focus on parts that meet the conditions boats see — not just whatever ships fastest.
Engineering review on request
Send a parts list or a layout and we'll check it against your boat before you order.
Direct from our team
Pricing, availability, and product questions all go through the same people who build custom harnesses and panels.