Pepperl+Fuchs
Pepperl+Fuchs NBB20-U4-UU – Inductive Proximity Sensor (AC/DC)
Pepperl+Fuchs NBB20-U4-UU – Inductive Proximity Sensor (AC/DC)
Manufacturer part number: NBB20-U4-UU
Price on Availability (POA)
Contact us for pricing, availability and lead times.
ENQUIRE NOWProduct Overview
The Pepperl+Fuchs NBB20-U4-UU is a 40 x 40 mm inductive proximity sensor with a 20 mm rated operating distance for flush mounting and a universal 2-wire AC/DC output. It operates from 20 … 253 V AC or 20 … 275 V DC and switches loads up to 500 mA directly.
The switching function is selectable between normally open and normally closed, and the sensor head is bidirectional and rotatable. A metal base with ground connection, terminal compartment wiring and IP67 protection make it a rugged replacement for mechanical limit switches on heavy machinery.
Key Features
- Manufacturer: Pepperl+Fuchs
- Model: NBB20-U4-UU
- Product type: Inductive Proximity Sensor (AC/DC)
- 20 mm rated operating distance, flush mounting
- Universal 2-wire AC/DC output
- NO/NC selectable
- Operating current up to 500 mA
- Bidirectional, rotatable sensor head
- Metal base with ground connection
- Terminal compartment wiring, IP67
Technical Specifications
| Manufacturer | Pepperl+Fuchs |
|---|---|
| Part number | NBB20-U4-UU |
| Product type | Inductive proximity sensor, 40 x 40 mm limit-switch style |
| Rated operating distance (sn) | 20 mm |
| Assured operating distance (sa) | 0 … 16.2 mm |
| Installation | Flush |
| Output | 2-wire AC/DC, NO/NC selectable |
| Rated operating voltage | 24 … 250 V DC / 24 … 230 V AC |
| Operating voltage range | 20 … 275 V DC / 20 … 253 V AC |
| Switching frequency | AC 0 … 30 Hz; DC 0 … 100 Hz |
| Operating current | 5 … 500 mA |
| Off-state current | ≤ 1.5 mA |
| Indicators | LED green (power), LED yellow (switching); flashes on overcurrent |
| Housing | PA 6.6 / metal base with ground connection (protection class I) |
| Connection | Terminal compartment, conductors up to 2.5 mm² |
| Dimensions | 40 x 40 x 118 mm |
| Mass | 280 g |
| Degree of protection | IP67 |
| Ambient temperature | -25 … 85 °C |
| Approvals | cULus Listed |
Specifications are taken from Pepperl+Fuchs manufacturer data. Always confirm critical values — particularly hazardous-area and functional-safety data — against the current datasheet, certificates and instruction manual before installation.
Applications
- Replacing mechanical limit switches
- Cranes, hoists and heavy machinery
- AC or DC control circuits
- Conveyors and material handling
Installation and Compatibility
Mount on the metal base and connect the protective earth. Wire in the terminal compartment (max. two conductors of the same cross-section per terminal). Select NO/NC as described in the manual. Observe minimum operating current 5 mA.
Frequently Asked Questions
What is the Pepperl+Fuchs NBB20-U4-UU?
The Pepperl+Fuchs NBB20-U4-UU is a 40 x 40 mm inductive proximity sensor with a 20 mm rated operating distance for flush mounting and a universal 2-wire AC/DC output. It operates from 20 … 253 V AC or 20 … 275 V DC and switches loads up to 500 mA directly.
What supply does the NBB20-U4-UU need?
20 … 275 V DC / 20 … 253 V AC.
How do I get a price for the NBB20-U4-UU?
This product is sold on a price on availability basis. Use the enquiry form on this page with your quantity and application details and the Valves UK team will reply with pricing and lead time.
Technical Documentation
- Pepperl+Fuchs NBB20-U4-UU datasheet (PDF)
- NBB20-U4-UU on the Pepperl+Fuchs website (certificates, manuals and drawings)
Related Products
- Pepperl+Fuchs NBN40-U4-UU – Inductive Proximity Sensor (AC/DC)
- Pepperl+Fuchs NBB5-18GM60-WS – Inductive Proximity Sensor (2-Wire AC)
- View the full Pepperl+Fuchs range at Valves UK
Price and Availability
Price on Availability (POA)
Contact Valves UK for pricing, product availability and technical enquiries regarding the Pepperl+Fuchs NBB20-U4-UU. Please include your required quantity and any relevant application details when submitting your enquiry.
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