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Product details
About this part
The Nikon RFLCT-XB 4S005-274 Optical Sensor Assembly is made by Nikon and identified by manufacturer part number 4S005-274.
This listing is for the exact part number stated above. Compare the part number, condition and photos with your equipment before ordering.
Condition
This item is listed as Used. Previously used. See condition notes and photos.
The photos are part of the description — check them for labels, connectors, markings and any visible wear.
What's included
1 × Nikon RFLCT-XB 4S005-274 Optical Sensor Assembly.
Only the items listed here or clearly shown in the photos are included. Cables, manuals, mounting hardware and accessories are not included unless stated.
Identification & compatibility
Check the manufacturer (Nikon), the part number (4S005-274) and the photos against your equipment. If you are not sure this is the right part, contact us before you order.
Price match
Found an identical item for less at a fixed price elsewhere? Contact us before you buy with the details, and we will review it.
Important information
Product information is based on what is available for this specific item. Where specifications or compatibility are critical to your application, confirm them before purchase.
- Brand
- Nikon
- Part number
- 4S005-274
- Model
- 4S005-274
- Assembly name
- RFLCT-XB
- Manufacturer
- Nikon Precision (Nikon Corporation), Made in Japan
- Housing
- Circular aluminium body with 6-bolt mounting flange
- Connections
- Multi-wire harness (red/black/blue) + SMA-type coaxial connector
- PCB markings
- J2728A, J2727A, MADE IN JAPAN [A1], UL mark
- System
- Nikon NSR lithography equipment (steppers/scanners)
The Nikon RFLCT-XB is an optical sensor assembly used in Nikon NSR semiconductor lithography systems (steppers/scanners), Nikon Precision part number 4S005-274. It is a Nikon lithography spare part. The PCB label reads "Nikon RFLCT-XB 4S005-274-" (the trailing dash indicates a blank revision field). The assembly houses the sensor PCB in a circular aluminium body with a 6-bolt mounting flange.
What is physically on this assembly?
A green sensor PCB is mounted inside a circular aluminium housing with a flange (6 bolt holes). The PCB carries a large-area sensor element. External connections are made via a multi-wire harness (red, black, blue wires) and an SMA-type coaxial connector. PCB markings include J2728A, J2727A, UL mark, and MADE IN JAPAN [A1].
What system does RFLCT-XB come from?
RFLCT-XB is a Nikon Precision part used in NSR (New Sub-micron Resolution) stepper and scanner systems for semiconductor wafer photolithography. Nikon Precision Inc. is the subsidiary that manufactures lithography equipment for chip foundries.
What does the part number mean?
RFLCT is the assembly designation on the PCB; XB is the type code. 4S005-274 is the Nikon Precision drawing or part number, also searchable as 4S005274. The trailing dash on the label (4S005-274-) indicates a revision field that is left blank.
- Ships from
- Israel
- Tracking
- Included on every order
Import duties and taxes may apply in your country and are paid by the buyer on delivery.
- Returns
- Not accepted
Return terms differ from item to item — this item's own policy is shown above.
Whatever it says, an item that arrives faulty or not as described is covered: tell us within 30 days of delivery and we will refund or replace it.
Consumers in the EU, the UK and Israel keep their legal right to cancel within 14 days. Full details and the return request form are on our Returns and warranty page.
Questions about this part
Where does the RFLCT-XB come from?
From Nikon Precision NSR semiconductor lithography equipment (steppers/scanners). It is a photolithography spare part, Nikon Precision part number 4S005-274.
What equipment does 4S005-274 come from?
Nikon NSR steppers and scanners, semiconductor photolithography systems used in wafer fabrication.
What do the J2728A and J2727A markings mean?
These are sub-assembly or PCB revision codes printed on the board by Nikon. They are not separately searchable model numbers.
What connector does it use?
An SMA-type coaxial connector for the signal line, plus a multi-wire harness (red, black, blue leads) for power and additional signals.
Are Nikon lithography spare parts like this still available?
Rarely new. NSR steppers are mature systems and most spare parts circulate through the used market. This unit is used, pulled from service.
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