Product Overview
A Carlingswitch Panel Breaker That Trips On Magnetics, Not Heat
Condition
Used, clean and in good condition. Five of these are on the shelf and this listing sells one, so the photographed piece is representative of the stock rather than the exact unit reserved for you. The molded black case photographs clean with light surface scuffs, the two threaded stud terminals and their hex nuts show bright plating, and the three auxiliary pins are gold colored and straight. The white spec label has aged to a yellow cast with some staining and remains fully legible, and the mounting screw heads show ordinary driver marks. The white lever handle carries a hand-applied 10A written in black marker, not factory printing. This breaker has not been powered, tripped, or tested here, so the label and these photos are the spec.
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Product Overview
The CA1-B2-34-610-311-C is a single pole C Series magnetic hydraulic circuit breaker from Carlingswitch, the Connecticut maker later known as Carling Technologies and now part of Littelfuse. Its label reads FL AMP 10, MAX VOLTS 80 for DC and 277 for AC, HERTZ DC and 50/60, DELAY 34, and TRIP AMPS 13.5, with 564-0101-1, MEXICO and the date code 9743 printed below, LOAD and LINE marked at the lower corners so nobody has to guess which end is which, and UR and CSA marks alongside. The back of the case is molded CARLINGSWITCH, INC. with U.S. patents 4,347,488, 4,504,807 and 4,760,226 and OTHERS PEND. Power lands on two threaded stud terminals with hex nuts, and a separate three pin block sits between them marked NC, C and NO for auxiliary status wiring, which is the detail that separates this configuration from a plain two-terminal breaker. Magnetic hydraulic breakers trip on a coil and a spring-loaded core moving through damping fluid instead of on a bimetal strip, which is why this family holds its trip point in cabinets that run hot or cold while thermal breakers drift. Stud thread size, panel cutout dimensions, handle actuation and auxiliary contact rating are not confirmed - verify against the Carling datasheet before use.
Key Features
- Carlingswitch CA1-B2-34-610-311-C, C Series magnetic hydraulic circuit breaker, single pole
- Label rating FL AMP 10, TRIP AMPS 13.5, DELAY 34
- MAX VOLTS 80 DC and 277 AC, marked HERTZ DC and 50/60
- Two threaded stud terminals with hex nuts, label marked LOAD and LINE
- Three pin auxiliary block marked NC, C and NO
- White lever handle with a hole through the tip
- Label also printed 564-0101-1, MEXICO, date code 9743, with UR and CSA marks
- Case molded CARLINGSWITCH, INC. with U.S. patents 4,347,488, 4,504,807 and 4,760,226
- Sold each from a stock of five; the photographed unit is representative
Applications
- A marine or RV electrician building a DC distribution panel who wants a breaker whose trip point does not wander when the engine bay heats up
- A telecom or battery plant technician protecting a 48 volt branch and using the NC, C and NO pins to send breaker status back to an alarm panel
- A generator set or control cabinet builder who needs a 10 amp branch device with an auxiliary contact feeding a PLC input or an indicator lamp
- A maintenance shop keeping older equipment original by matching the CA1-B2-34-610-311-C on the existing panel instead of redrilling for a modern breaker
Frequently Asked Questions
What do the numbers on the label actually tell me?
FL AMP 10 is the full load current rating and TRIP AMPS 13.5 is the current printed as the trip figure. MAX VOLTS 80 applies to DC and 277 to AC, with HERTZ shown as DC and 50/60. DELAY 34 is the Carling delay curve designation for this build. The 9743 below reads as a date code in year and week form, placing this one in week 43 of 1997, late October.
Does it have auxiliary contacts?
Yes. Between the two stud terminals there is a small block with three pins marked NC, C and NO, the standard arrangement for auxiliary status wiring. The auxiliary contact rating is not printed on the label, so treat it as not confirmed and check the Carling datasheet before loading it.
How is a magnetic hydraulic breaker different from a thermal one?
A thermal breaker senses current by heating a bimetal strip, so hot or cold surroundings shift when it lets go. A magnetic hydraulic breaker uses a coil and a spring-loaded core in damping fluid, so its trip curve stays where the designer put it across a wide ambient range. That is why they show up in vehicles, vessels and outdoor cabinets.
What is the 564-0101-1 on the label?
It is a second number printed under the main part number on the factory label, above MEXICO and the date code. We list it because it is what someone cross-referencing a panel or an old bill of material may be searching for. The catalog part number for ordering purposes remains CA1-B2-34-610-311-C.
It is sold used and untested, so what am I taking on?
You are taking on the testing. We have not applied power, tripped it, checked continuity or measured the auxiliary contacts, and we make no claim about how the handle moves. What you get is the piece you can see: label markings we read straight off the part, a clean molded case, two plated stud terminals with nuts, and three auxiliary pins, priced as used hardware rather than as a qualified spare. For a bench, a rebuild or a panel where you will verify before you trust it, that trade is a good one. Shipping is a flat $8 and becomes free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
The 9743 on the label puts this one in week 43 of 1997, late October, back when the case still said CARLINGSWITCH, INC. in raised letters and a breaker was expected to outlast the panel around it. Damping fluid does not care whether your cabinet is freezing or baking, so hand it a circuit to watch and let it go back to the job it was built for.
