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40.61.9.090.4303 Finder Miniature PCB relay 1pole 16A DC 90V
40.61.9.090.4303 Finder Miniature PCB relay 1pole 16A DC 90V.
Why Choose the Finder 40.61.9.090.4303 Miniature Power Relay?
The Finder 40.61.9.090.4303 is a compact 16 A electromechanical power relay designed for industrial automation, electronic control systems and electrical switching applications. Part of the established Finder 40 Series, this miniature relay combines high-current switching capability with a space-saving design suitable for printed circuit boards (PCBs) and compatible relay sockets.
Featuring a 90 V DC operating coil, a single changeover contact (1 CO / SPDT) and silver tin oxide (AgSnO₂) contact material, the Finder 40.61.9.090.4303 is particularly suitable for applications requiring dependable switching of electrical loads, including equipment with demanding inrush-current characteristics.
The Finder 40.61 relay family offers a 16 A rated contact current, 250 V AC rated switching voltage and 4,000 VA AC1 resistive switching capacity. Its 5 mm terminal pin pitch and compatibility with selected Finder 95 Series sockets provide flexible integration into industrial control equipment, OEM assemblies and electrical panels.
Key Advantages
- 16 A rated contact current for industrial power switching applications.
- 90 V DC operating coil for compatible DC control circuits.
- Single changeover contact (SPDT) provides normally open and normally closed switching functions.
- Silver tin oxide (AgSnO₂) contacts provide improved suitability for certain high-inrush switching applications.
- 4,000 VA AC1 resistive switching capacity for suitable electrical loads.
- 250 V AC rated switching voltage with a maximum switching voltage of 400 V AC.
- Compact PCB-compatible construction supports space-efficient equipment design.
- 5 mm contact pin pitch for compatible PCB footprints and relay sockets.
- 6 kV coil-to-contact impulse insulation supports electrical separation between control and load circuits.
- Monostable electromechanical operation provides predictable switching.
- Suitable for selected Finder 95 Series relay sockets.
- Practical for industrial automation, electrical control panels and OEM equipment.
Key Features
- Finder 40 Series miniature electromechanical power relay.
- Type 40.61: Single-pole, 16 A relay.
- 90 V DC nominal coil voltage.
- One changeover contact (1 CO / SPDT).
- Silver tin oxide (AgSnO₂) contact material.
- 16 A rated contact current.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 4,000 VA AC1 resistive switching capacity.
- 750 VA AC15 inductive switching capacity at 230 V AC.
- 0.55 kW single-phase motor rating at 230 V AC for the relay family.
- 0.65 W standard DC coil consumption.
- 6 kV impulse withstand voltage between coil and contacts.
- 8 mm coil-to-contact creepage and clearance.
- 5 mm terminal pin pitch.
- PCB or compatible socket mounting.
- Compact relay body measuring approximately 29 × 25 × 12.4 mm.
Silver Tin Oxide Contacts for Demanding Electrical Switching
A distinguishing feature of the Finder 40.61.9.090.4303 is its AgSnO₂ contact material. Silver tin oxide contacts are used in relay applications where resistance to contact welding and performance under certain high-inrush conditions are important. This makes the contact configuration useful for appropriately rated electrical equipment with challenging switching characteristics.
When the relay's 90 V DC coil is energised, its internal electromagnetic mechanism transfers the common contact from the normally closed terminal to the normally open terminal. When the coil supply is removed, the relay returns to its normal de-energised position. This enables a separate control circuit to operate a load without carrying the full switched current through the control device.
The Finder 40.61 relay family includes AgSnO₂ versions with a specified 120 A peak inrush capability for 5 ms on the normally open contact under defined conditions. This is a short-duration peak rating, not a continuous current rating. The continuous contact rating remains 16 A, and actual switching suitability depends on the connected load, operating frequency and applicable manufacturer ratings.
The relay can be incorporated into a suitable PCB design or used with a compatible Finder 95 Series socket. Where DIN rail mounting is required, an appropriately rated socket provides the mounting interface. The exact terminal arrangement, special-version suffix and environmental protection requirements should be checked against the manufacturer's documentation before installation.
Typical Applications
- Industrial automation and machinery control.
- Printed circuit board power switching.
- OEM electrical and electronic equipment.
- Electrical control panels and distribution assemblies.
- Power supply and auxiliary load switching.
- Equipment with demanding inrush-current characteristics.
- Motor and electromechanical load control within specified ratings.
- Building automation and HVAC control systems.
- Industrial signal and power interfacing.
- Maintenance and replacement in compatible relay assemblies.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Mounting Type | PCB, Plug-in socket | |
| Switching Current (A) | 16 A | |
| Load Voltage | 400 V AC | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.61.9.090.4303 | |
| Product type | Miniature electromechanical power relay | |
| Relay operation | Monostable / non-latching | |
| Number of poles | 1 | |
| Contact configuration | 1 CO (SPDT) | |
| Contact material | Silver tin oxide (AgSnO₂) | |
| Rated contact current | 16 A | |
| Maximum peak current | Up to 30 A under specified relay conditions | |
| High-inrush capability | Up to 120 A for 5 ms on the normally open contact under specified conditions for AgSnO₂ versions | |
| Rated switching voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated resistive load (AC1) | 4,000 VA | |
| Rated inductive load (AC15) | 750 VA at 230 V AC | |
| Single-phase motor rating | 0.55 kW at 230 V AC | |
| DC1 switching capacity at 30 V DC | 16 A | |
| DC1 switching capacity at 110 V DC | 0.3 A | |
| DC1 switching capacity at 220 V DC | 0.12 A | |
| Minimum switching load | 500 mW (10 V / 5 mA) | |
| Nominal coil voltage | 90 V DC | |
| Coil supply type | DC | |
| Standard DC coil consumption | 0.65 W | |
| Nominal coil resistance | Approximately 12,500 Ω | |
| Standard DC coil operating range | Approximately 65.7–135 V DC | |
| Operate time | Approximately 7 ms | |
| Release time | Approximately 3 ms | |
| Coil-to-contact impulse withstand voltage | 6 kV (1.2/50 µs) | |
| Coil-to-contact insulation distance | 8 mm | |
| Dielectric strength between open contacts | 1,000 V AC | |
| Mechanical life | Up to 20 million operations for standard DC-operated 40.61 relays | |
| Electrical life at rated AC1 load | 100,000 operations | |
| Standard relay family operating temperature | −40 to +85 °C | |
| Mounting type | PCB or compatible plug-in socket | |
| Compatible socket family | Finder 95 Series | |
| Contact pin pitch | 5 mm | |
| Approximate relay body dimensions | 29 × 25 × 12.4 mm | |
| Typical application | Industrial automation, PCB power switching and electrical control equipment |
Frequently Asked Questions
What is the Finder 40.61.9.090.4303 used for?
The Finder 40.61.9.090.4303 is a miniature electromechanical power relay used for industrial automation, PCB switching and electrical control equipment. It features a 90 V DC coil, a 16 A changeover contact and silver tin oxide contact material.
What is the difference between the Finder 40.61.9.090.4303 and 40.61.9.090.1303?
The key distinction is the contact material. The 40.61.9.090.4303 uses silver tin oxide (AgSnO₂) contacts, while the 40.61.9.090.1303 uses silver nickel (AgNi) contacts. Both are 40.61 miniature relays with a 90 V DC coil and single changeover contact, but their contact materials suit different switching requirements.
What coil voltage does the Finder 40.61.9.090.4303 require?
The relay requires a 90 V DC nominal coil supply. The control voltage is separate from the electrical voltage switched by the relay contacts.
Is the Finder 40.61.9.090.4303 suitable for high-inrush loads?
The AgSnO₂ contact version is designed to provide improved suitability for certain high-inrush switching applications. The Finder 40.61 relay family specifies a short-duration peak capability of up to 120 A for 5 ms on the normally open contact under defined conditions. The connected load must still be checked against the applicable continuous and switching ratings.
Can the Finder 40.61.9.090.4303 be installed on a DIN rail?
The relay itself is designed for PCB or compatible socket mounting. It can be installed on a 35 mm DIN rail using a suitable Finder 95 Series socket designed for DIN rail installation. The socket must be compatible with the relay's terminal arrangement and electrical ratings.
Trusted by Industrial Automation and Electrical Engineering Professionals
Finder 40 Series miniature power relays provide compact electromechanical switching solutions for industrial control systems, electronic equipment and electrical automation. With a choice of contact materials, coil voltages and mounting arrangements, the range supports electrical engineers, machine builders, panel manufacturers and maintenance professionals requiring dependable relay performance.
