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40.51.9.028.2000 Finder Miniature PCB relay 1pole 10A DC 28V
Finder 40.51.9.028.2000 is a miniature electromagnetic PCB relay with a 28 V DC coil, one 10 A changeover contact and AgCdO 90/10 contact material.
Why Choose the Finder 40.51.9.028.2000 Miniature PCB Relay?
The Finder 40.51.9.028.2000 is a compact and reliable miniature electromagnetic PCB relay designed for switching electrical loads in industrial control, automation and electronic equipment. Part of the proven Finder 40 Series, it combines a 28 V DC coil with one changeover contact rated at 10 A.
This relay uses an AgCdO 90/10 contact and an SPDT configuration that provides normally open and normally closed switching paths. This combination makes it suitable for interface, signalling and load-control circuits requiring flexible switching from a single relay contact.
The 40.51.9.028.2000 features through-hole terminals and 5 mm pinning for direct PCB installation or use with a compatible Finder 95 Series socket. Its compact 29 × 12.4 × 25 mm enclosure helps conserve space within control boards and industrial electronic assemblies.
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.
- AgCdO 90/10 contact material for dependable load switching.
- Low 0.65 W coil consumption.
- Through-hole construction supports 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.
- AgCdO 90/10 contact material.
- 1,200 Ω coil resistance.
- Monostable electromagnetic operation.
- Flux-proof RT II enclosure.
Reliable Changeover Switching for Control Systems
Electromagnetic relays allow a low-power control circuit to switch an electrically isolated load circuit. Applying 28 V DC to the coil of the Finder 40.51.9.028.2000 transfers its changeover contact between the normally closed and normally open circuits.
The relay’s changeover operation, AgCdO contact and compact dimensions make it suitable for industrial control boards, interface circuits and automated equipment. It can be soldered directly onto a PCB or installed in a compatible Finder socket where removable mounting is preferred.
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 | |
| Load Voltage | 400 V AC | |
| Switching Current (A) | 10 A | |
| Coil / Supply Voltage | 28 V DC | |
| Contacts | 1 C/O | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.51.9.028.2000 | |
| 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 | |
| Maximum switching voltage | 400 V AC | |
| Rated load AC1 | 2,500 VA | |
| Contact material | AgCdO 90/10 | |
| 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 40.51.9.028.2000 used for?
This miniature electromagnetic relay switches isolated electrical circuits in industrial automation equipment, control panels and PCB assemblies.
What coil voltage does this relay require?
The Finder 40.51.9.028.2000 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 connections.
What contact material is used?
The relay uses an AgCdO 90/10 contact for dependable electrical load switching.
What is the contact current rating?
The relay’s changeover contact has a rated current of 10 A.
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.
