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40.51.9.028.0000 Finder Miniature PCB relay 1pole 10A DC 28V
Finder 40.51.9.028.0000 is a miniature electromagnetic PCB relay with a 28 V DC coil, one 10 A changeover contact and AgNi contact material.
Why Choose the Finder 40.51.9.028.0000 Miniature PCB Relay?
The Finder 40.51.9.028.0000 is a compact and dependable miniature electromagnetic PCB relay designed for switching electrical loads in industrial control, automation and electronic equipment. Part of the established Finder 40 Series, it combines a 28 V DC coil with one changeover contact rated at 10 A.
Its SPDT contact configuration provides both normally open and normally closed switching paths, giving control-system designers greater flexibility when creating interface, signalling and load-control circuits. The relay uses durable AgNi contact material and provides electrical isolation between the coil and contact circuits.
The 40.51.9.028.0000 supports direct through-hole PCB installation and compatible plug-in socket mounting. Its compact 29 × 12.4 × 25 mm enclosure makes it particularly suitable for densely populated control boards and space-conscious industrial equipment.
Key Advantages
- Compact miniature relay for PCB and plug-in applications.
- 28 V DC coil for compatible industrial control circuits.
- Flexible single changeover contact rated at 10 A.
- AgNi contact material supports reliable load switching.
- Low 0.65 W coil consumption.
- Through-hole construction enables secure PCB installation.
Key Features
- Finder 40 Series miniature PCB relay.
- 28 V DC nominal coil voltage.
- SPDT / 1 CO contact configuration.
- 10 A rated contact current.
- 250 V AC rated contact voltage.
- AgNi contact material.
- 1,200 Ω coil resistance.
- Monostable electromagnetic operation.
- Flux-proof RT II enclosure.
Reliable Switching for Industrial Control Systems
Electromagnetic relays allow a relatively low-power control circuit to switch an electrically isolated load circuit. Applying 28 V DC to the coil of the Finder 40.51.9.028.0000 transfers its changeover contact between the normally closed and normally open circuits.
The relay’s compact format, changeover contact and 10 A switching capacity make it suitable for industrial control boards, interface modules and electronic equipment. It can be soldered directly onto a PCB or installed in a compatible Finder socket where removable relay mounting is required.
Typical Applications
- Industrial automation and machine controls.
- Printed circuit boards and electronic assemblies.
- PLC interface and output circuits.
- Control panels and auxiliary switching systems.
- Heating, ventilation and building automation equipment.
- Signalling, interlocking and load-control circuits.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Mounting Type | PCB, Plug-in socket | |
| Switching Current (A) | 10 A | |
| Coil / Supply Voltage | 28 V DC | |
| Contacts | 1 C/O | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.51.9.028.0000 | |
| Product type | Miniature electromagnetic PCB relay | |
| Coil voltage | 28 V DC | |
| Coil resistance | 1,200 Ω | |
| Rated coil consumption | 0.65 W | |
| Rated coil current | 23 mA | |
| Coil operating range | 20.5–42 V DC | |
| Contact configuration | 1 changeover contact (SPDT / 1 CO) | |
| Rated contact current | 10 A | |
| Rated contact voltage | 250 V AC | |
| Contact material | AgNi | |
| Operating type | Monostable | |
| Mounting type | Through-hole PCB / compatible plug-in socket | |
| Pinning | 5 mm | |
| Protection category | RT II flux proof | |
| Dimensions (L × W × H) | 29 × 12.4 × 25 mm |
Frequently Asked Questions
What is the Finder 40.51.9.028.0000 used for?
This miniature electromagnetic relay is used to switch isolated electrical circuits in automation equipment, control panels, interface modules and PCB assemblies.
What coil voltage does this relay require?
The Finder 40.51.9.028.0000 has a nominal 28 V DC coil.
What contact configuration does the relay have?
It has one SPDT changeover contact, providing normally open, normally closed and common terminals.
What is the contact current rating?
The relay’s changeover contact has a rated current of 10 A.
How can this relay be installed?
The relay can be mounted directly onto a printed circuit board using its through-hole terminals or fitted into a compatible Finder plug-in socket.
Trusted Finder Relay Technology
Finder 40 Series miniature relays are widely used in industrial automation, electronic assemblies and control equipment where compact construction and dependable electrical switching are required.
