Product Overview
Schneider Multi 9 C60SP D 3A Two-Pole DIN Rail Breaker, 480Y/277V, Marked UL 1077
Condition
Used. The white housing is clean, with light surface scuffing on the side face and a blank label window that was never filled in. The front label reads Schneider Electric, Multi 9, C60SP, D 3A, 480Y/277V~, UL1077, M9F23203, and the green line and gear pictogram are unfaded. Both toggles are ganged by a common gray handle bar and sit in the 0/OFF position in the photos. The terminal screws carry bright tool marks in the Pozidriv recesses, consistent with a part that has been wired in before. The case side carries the Merlin Gerin molding, the EAN barcode 3 606481 169044, and Made in FRANCE.
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Product Overview
The Schneider Electric Multi 9 C60SP, part number M9F23203, is a two-pole 3 A miniature circuit breaker with a D tripping curve, built for 35 mm DIN rail in control panels and distribution assemblies. D curve means it rides through high inrush instead of nuisance tripping on it, and the case confirms the setting: the side is marked Ii=12In, so the magnetic element looks for roughly twelve times the 3 A rating. The front label rates it 480Y/277V~ and the side face prints the full interrupting story - 10 kA air at 480Y/277 V AC, 14 kA at 240 V AC, 10 kA at 125 V DC - along with UL 1077 File E90509, CSA 22.2 No. 235 MC 179014, IEC/EN 60947-2 and GB/T 14048.2. The two poles are tied by a common handle so both legs make and break together. Schneider carries the Multi 9 line today; this one still has Merlin Gerin molded into the case beside the Schneider label, and it was made in France.
Key Features
- Part number: M9F23203, Schneider Electric Multi 9 C60SP
- Current rating: 3 A, D curve, marked Ii=12In at Tref=25 C
- Voltage: 480Y/277 V AC, front label marked 480Y/277V~
- Poles: 2, ganged by a common handle bar
- Interrupting capacity marked on the case: 10 kA air at 480Y/277 V AC, 14 kA at 240 V AC, 10 kA at 125 V DC
- IEC values marked: Icu 6 kA at 440 V, 10 kA at 415 V, 20 kA at 240 V, Ics/Icu 75 percent
- Standards marked: UL 1077 File E90509, CSA 22.2 No. 235 MC 179014, IEC/EN 60947-2, GB/T 14048.2
- Terminals: 75 C copper wire only, AWG 18-8 (1 to 25 mm2), torque 22 lbf-in (2.5 N.m), PZ2 driver
- Strip length diagram on the case: 0.55 in (14 mm); front notes 12 in. minimum wire length
- Insulation: Uimp 6 kV, Ui 500 V, pollution degree 3, Cat A, 50/60 Hz, OL0 TC2 FW0
- Mounting: 35 mm DIN rail
- EAN: 3606481169044, Made in France
Applications
- Controls technician swapping a failed 3 A supplementary protector out of a 480Y/277 V machine panel without redrawing the print
- Machine builder protecting a control transformer primary or a solenoid bank whose inrush keeps knocking out a C curve device
- Maintenance electrician keeping an older Merlin Gerin era Multi 9 rail assembly matched module for module
- Panel shop stocking two-pole D curve spares so a running line is not waiting on a distributor lead time
Frequently Asked Questions
Is this a UL 489 branch circuit breaker?
No. The front label and the side face both read UL 1077, File E90509, which is the supplementary protector listing, and the case also carries CSA 22.2 No. 235 and IEC/EN 60947-2. Use it downstream of branch circuit protection, the way it is applied in control panels, and confirm the application against your own design and inspector before you install it.
What does the D curve get me over a C curve at 3 amps?
Headroom on inrush. The case is marked Ii=12In, so the instantaneous element is looking for about twelve times the 3 A rating instead of the five to ten times a C curve device uses. That is why D curve parts land on transformer primaries, solenoid and contactor coils, and switching supplies that thump on start. Thermal behavior for sustained overload is unchanged.
What wire size and torque do the terminals take?
The side of the case specifies 75 C copper wire only, AWG 18-8 (1 to 25 mm2), tightened to 22 lbf-in (2.5 N.m) with a PZ2 driver, stripped 0.55 in (14 mm). The front face adds a 12 in. minimum wire length note for the connection diagrams printed there. Torque to the marked value; these are pressure plate terminals and they do not like being guessed at.
Why does it say both Schneider Electric and Merlin Gerin?
Both names are physically on the part. The front label is Schneider Electric with the Multi 9 line name, and Merlin Gerin is molded into the case side, which is where the Multi 9 family started. Neither changes what you order: the part number marked on the label is M9F23203, and the barcode reads 3 606481 169044.
It is listed as used, so what am I actually getting?
A used breaker, sold as it sits. Cosmetically it is clean, with the light scuffing described above and an unwritten label window, but it has not been trip-tested or hipot checked here, so the marked ratings and the photographs are the spec, not a bench report. If it is going into something that matters, verify operation in your panel before you rely on it. Shipping is $8 flat rate and free once the order passes $28, and orders leave our Idaho warehouse the same or next business day.
Made in France, with Merlin Gerin still molded into a case that wears a Schneider label - a quiet record of who drew the Multi 9 line first. Snap it back onto the rail and let it go watch a 3 amp circuit nobody thinks about until the day it matters.
