Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
40.61.9.021.1001 Finder Miniature PCB relay 1pole 16A DC 21V
40.61.9.021.1001 Finder Miniature PCB relay 1pole 16A DC 21V.
Overview
The Finder 40.61.9.021.1001 is a compact 16 A miniature PCB and plug-in power relay from Finder's established 40 Series. Featuring a 21 V DC coil, one changeover contact (1 CO / SPDT) and a wash-tight RT III construction, this relay is designed for dependable switching in industrial automation, electronic control equipment and electrical interface applications.
The 40.61 relay family combines a compact housing with high-capacity contacts and reinforced insulation between the coil and contact circuits. The 40.61.9.021.1001 uses a monostable electromagnetic mechanism, allowing a DC control signal to operate an independent electrical circuit. Its single changeover contact provides both normally open and normally closed switching paths.
The wash-tight version provides additional protection during suitable printed circuit board manufacturing and cleaning processes. Combined with PCB mounting and compatibility with appropriately specified Finder sockets, this makes the relay a practical choice for original equipment manufacturers, control panel builders and maintenance engineers.
Key Advantages
- 16 A switching capability: Supports appropriately rated electrical loads in industrial and electronic control equipment.
- 21 V DC operating coil: Designed for control systems using a nominal 21 V DC supply.
- Single changeover contact: Provides flexible normally open and normally closed switching functions.
- Wash-tight RT III construction: Offers additional protection during compatible PCB cleaning processes.
- Compact design: Suitable for space-conscious printed circuit board assemblies.
- PCB and socket compatibility: Supports direct PCB installation and compatible plug-in relay arrangements.
- Reinforced insulation: Provides electrical separation between the control coil and switched contacts.
- Monostable operation: Automatically returns to the normal contact position when coil power is removed.
- Industrial versatility: Suitable for automation, machinery control and electrical interface applications.
- Finder 40 Series engineering: Part of an established family of miniature electromechanical relays.
Key Features
- Finder 40 Series miniature electromagnetic power relay.
- Manufacturer part number 40.61.9.021.1001.
- One changeover contact (1 CO / SPDT / 1 Form C).
- 16 A rated contact current.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 4,000 VA rated resistive switching capacity (AC1).
- 21 V DC nominal coil voltage.
- 0.65 W nominal DC coil consumption.
- 700 Ω nominal coil resistance.
- Wash-tight RT III construction.
- PCB and compatible socket mounting.
- Monostable electromagnetic operating mechanism.
- Compact housing suitable for electronic control assemblies.
- Reinforced insulation between coil and contacts.
- Suitable for industrial control, automation and auxiliary switching.
Reliable Switching for Industrial Electronic Control Systems
The Finder 40.61.9.021.1001 operates by energising its 21 V DC electromagnetic coil. When the coil receives the correct supply voltage, the internal mechanism transfers the common contact from the normally closed terminal to the normally open terminal. Removing the coil supply returns the relay to its normal position. This provides a practical method of controlling a separate electrical circuit from a low-power control signal.
The relay's 16 A contact rating and compact PCB construction make it suitable for a range of switching applications, while its RT III wash-tight construction supports integration into suitable electronic manufacturing processes. Wash-tight protection should not be interpreted as continuous waterproof or outdoor protection. Correct relay selection must consider the connected load, inrush current, switching frequency, coil drive conditions and required electrical protection.
Typical Applications
- Industrial automation: Switching auxiliary circuits in automated control equipment.
- Electronic control boards: Electromechanical load switching within PCB assemblies.
- Machinery control: Interface switching between controllers and external equipment.
- Control panels: Auxiliary relay functions in industrial electrical systems.
- OEM electronics: Integration into purpose-designed electronic equipment.
- Building automation: Switching suitably rated electrical circuits.
- Relay interface systems: Use with compatible Finder relay sockets.
- Equipment maintenance: Replacement of matching 40.61 relay variants.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Plug-in Relay | |
|---|---|---|
| Terminal Type | PCB / pins | |
| Load Voltage | 400 V AC | |
| Switching Current (A) | 16 A | |
| Manufacturer | Finder | |
| Product series | 40 Series | |
| Relay type | 40.61 | |
| Manufacturer part number | 40.61.9.021.1001 | |
| Product category | Miniature electromagnetic power relay | |
| Contact configuration | 1 CO / SPDT / 1 Form C | |
| Number of poles | 1 | |
| Rated contact current | 16 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated resistive load (AC1) | 4,000 VA | |
| Rated inductive load (AC15 at 230 V AC) | 750 VA | |
| Nominal coil voltage | 21 V DC | |
| Coil supply type | DC | |
| Nominal coil consumption | 0.65 W | |
| Nominal coil resistance | 700 Ω | |
| Nominal coil current | 30 mA | |
| DC coil operating voltage range | 15.3–31.5 V DC | |
| Mounting arrangement | PCB / compatible relay socket | |
| Connection type | PCB terminals | |
| Environmental protection category | RT III (wash-tight) | |
| Operating mechanism | Monostable electromagnetic | |
| Typical operate time | 12 ms | |
| Typical release time | 4 ms | |
| Impulse withstand voltage between coil and contacts | 6 kV | |
| Dielectric strength between open contacts | 1,000 V AC | |
| Approximate housing dimensions | 29 × 12.4 × 25 mm |
Frequently Asked Questions
What is the Finder 40.61.9.021.1001 used for?
The Finder 40.61.9.021.1001 is a miniature electromagnetic power relay used for switching electrical circuits in industrial automation, electronic control boards, machinery and interface equipment. It features a 16 A contact rating and one changeover contact.
What coil voltage does the Finder 40.61.9.021.1001 require?
The relay has a 21 V DC nominal coil voltage, with approximately 0.65 W nominal coil consumption and 700 Ω coil resistance. Its specified DC coil operating range is approximately 15.3–31.5 V DC.
What does the 1001 suffix indicate on this Finder relay?
The 1001 suffix identifies a variant with RT III wash-tight construction. This provides additional protection during suitable PCB cleaning processes compared with standard RT I relay versions.
What contact configuration does the Finder 40.61.9.021.1001 have?
The relay features one changeover contact (1 CO / SPDT), comprising a common terminal, normally open contact and normally closed contact. The contact transfers when the relay coil is energised.
Can the Finder 40.61.9.021.1001 be mounted on a PCB or relay socket?
Yes. The Finder 40.61 relay family supports PCB mounting and installation in compatible Finder relay sockets. The terminal arrangement, socket compatibility and installation requirements should be confirmed before use.
Trusted by Industrial Automation and Electronic Control Engineers
Finder 40 Series miniature power relays combine compact construction, dependable electromechanical switching and flexible installation options, making them practical components for industrial automation, electronic control assemblies and machinery interfaces.
