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40.51.9.028.0003 Finder Miniature PCB relay 1pole 10A DC 28V
Finder 40.51.9.028.0003 is an RT III wash-tight high-temperature PCB relay with a 28 V DC coil, one 10 A changeover contact and an ambient temperature rating up to +125 °C.
Why Choose the Finder 40.51.9.028.0003 High-Temperature PCB Relay?
The Finder 40.51.9.028.0003 is a compact high-temperature miniature electromagnetic 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.
This special version is designed for operation at ambient temperatures up to +125 °C, making it suitable for electronic assemblies exposed to elevated operating temperatures. Its SPDT contact provides normally open and normally closed switching paths, while the AgNi contact material supports dependable electrical switching.
The 40.51.9.028.0003 also features a wash-tight RT III enclosure for compatible automated PCB cleaning processes. Its through-hole terminals, 5 mm pinning and compact 29 × 12.4 × 25 mm enclosure enable efficient integration into densely populated printed circuit boards.
Key Advantages
- Special high-temperature version rated up to +125 °C.
- Wash-tight RT III construction for compatible PCB production processes.
- 28 V DC coil for industrial and electronic control circuits.
- Flexible single changeover contact rated at 10 A.
- AgNi contact material supports reliable load switching.
- Compact through-hole design conserves PCB installation space.
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.
- RT III wash-tight, high-temperature enclosure.
Reliable Switching in High-Temperature Environments
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 40.51.9.028.0003 transfers its changeover contact between the normally closed and normally open circuits.
This special high-temperature model extends the relay’s ambient operating capability to +125 °C while retaining a wash-tight enclosure. It is therefore suited to control boards and electronic assemblies installed near heat-generating components or within equipment exposed to elevated temperatures.
Typical Applications
- High-temperature industrial electronic equipment.
- Printed circuit boards requiring wash-tight components.
- Industrial automation and machine controls.
- Heating and temperature-control equipment.
- PLC interface and output circuits.
- Control, signalling and interlocking systems.
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 | 40.51.9.028.0003 | |
| Product type | High-temperature miniature electromagnetic 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 | AgNi | |
| Operating type | Monostable | |
| Mounting type | Through-hole PCB / compatible plug-in socket | |
| Pinning | 5 mm | |
| Protection category | RT III wash tight | |
| Maximum ambient temperature | +125 °C | |
| Dimensions (L × W × H) | 29 × 12.4 × 25 mm |
Frequently Asked Questions
What is the Finder 40.51.9.028.0003 used for?
This miniature relay switches isolated electrical circuits in industrial and electronic equipment operating in high-temperature environments.
What coil voltage does this relay require?
The Finder 40.51.9.028.0003 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 is the maximum ambient temperature?
This special high-temperature relay version is designed for ambient temperatures up to +125 °C.
Is this relay wash tight?
Yes. The relay has an RT III wash-tight enclosure suitable for compatible PCB washing processes when handled in accordance with Finder’s production guidance.
Trusted Finder Relay Technology
Finder 40 Series high-temperature relays provide compact and dependable switching for demanding industrial control boards and professionally manufactured electronic assemblies.
