Fuji AR30B2R-11G Mushroom Head Button Switch: Complete Guide for PLC Industrial Automation

29. Januar 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

The Fuji Electric AR30B2R-11G is a 30 mm panel-mount mushroom-head pushbutton — black metal head on the AR30 body, supplied with one NO and one NC contact block (blue AR9B290, red AR9B291, Ue 600 V, Ith 10 A). The mechanism label carries the full certification set: UL/cUL LISTED (9Y27R), CCC, CE, and the JIS-era ratings A600 / R300 with 250 V 6 A for electromagnetic duty. Two purchases cover 160 units in total — 60 on 2026-01-29 and 100 more on 2026-03-06 — all new in the Fuji-format white boxes.

What the markings say

Item	Value on body / contacts
Model	AR30B2R-11G
Brand	Fuji Electric (Fe mark)
Head	Black metal mushroom, 30 mm mounting
Contacts	AR9B290 N.O. (blue) + AR9B291 N.C. (red)
Contact rating	Ue 600 V, Ith 10 A (JIS); A600 / R300; 250 V 6 A electromagnetic
Certifications	UL / cUL LISTED 9Y27R, IND. CONT. EQ. 250C, CCC, CE
Order	60 + 100 = 160 units, new

AR30B2R-11G front and contacts — Rear three-quarter view: the black head, anti-rotation flats, silver backing plate, and the snap-on contact stack — blue NO and red NC with their spring terminals.

AR30B2R-11G contacts close — Contact block close-up: AR9B290 N.O. on blue, AR9B291 on red with Ue 600V Ith 10A JIS and CE — they clip straight onto the mechanism without tools.

AR30B2R-11G green head top — The green mushroom head from the top, box grid behind.

AR30B2R-11G green button — The mushroom head straight-on: green cap in the black collar — the -11G suffix covers the green actuator.

Mechanism and locknut

AR30B2R-11G mechanism rear — From the rear with contacts off: the plastic contact carrier, the anti-rotation tab, and the wide knurled locknut that clamps the panel from behind.

AR30B2R-11G contacts from behind — Contact stack from behind: screw clamps open, contact springs in place — swap a block in seconds for NO/NC reconfiguration.

AR30B2R-11G side view — Side view: the depth stack — head, panel nut, silver anti-rotation plate, contact carrier.

Video: the button turned on the bench — head, mechanism and contacts in sequence.

Mechanism label

AR30B2R label close — Label close-up — the LISTED 253C marks repeat on both contact blocks; the 9Y27R file number anchors the UL listing.

Video: second unit, contacts clipped on.

Packaging and quantities

AR30B2R-11G head side — Head from the side: the metal mushroom cap seated in its black collar, box stack behind.

AR30B2R-11G white box — One unit's white box: AR30B2R-11G label with RoHS and star marks.

AR30B2R-11G cartons of boxes — Four master cartons of boxed units from the first batch — 60 buttons boxed and counted.

AR30B2R-11G cartons stacked — Three more cartons from the second batch of 100.

AR30B2R-11G box grid — Box grid in one carton — every box carries the same AR30B2R-11G label.

AR30B2R-11G single boxed — A single box lifted from the stack.

AR30B2R-11G another rear — Another rear angle — contact blocks, carrier and locknut in line.

AR30B2R-11G assembled rear — One more assembled rear view — contacts seated on the carrier.

AR30B2R-11G contacts rear — Contact terminals from behind — screw clamps take solid or ferruled wire.

AR30B2R-11G assembled — One assembled unit: contacts on, locknut threaded, ready for a panel cutout.

AR30B2R-11G box label — Box label straight-on: AR30B2R-11G with RoHS and the Fuji star.

AR30B2R-11G carton rows — Carton rows opened on the floor — first and second batches together.

Fitting notes

The AR30 series uses the standard 30 mm hole; the anti-rotation tab sits in a 4.8 mm notch. The 11G configuration — one NO plus one NC — suits a start command with an interlock break, and the blocks re-clip for any 1- to 2-contact mix. For electromagnetic coil duty the label's 250 V 6 A row applies; for resistive pilot circuits use the A600/R300 figures. The metal mushroom head takes panel abuse far better than plastic caps in high-traffic stations.

Condition and delivery facts

All 160 units new in factory boxes, mechanisms and contact blocks bagged. First batch of 60 received 2026-01-29, second batch of 100 on 2026-03-06; 0.5 kg per unit boxed.