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40.61.9.021.4003 Finder Miniature PCB relay 1pole 16A DC 21V
Finder 40.61.9.021.4003 miniature electromechanical power relay featuring a 21 V DC coil and 16 A SPDT changeover contact, designed for industrial automation, electrical switching and electronic control applications.
Why Choose the Finder 40.61.9.021.4003 Miniature Power Relay?
The Finder 40.61.9.021.4003 is a compact and dependable 16 A electromechanical power relay designed for reliable electrical switching in industrial automation, electronic control equipment and machinery applications. As part of the established Finder 40 Series miniature PCB and plug-in relay range, it combines a high-current switching capability with a space-saving design suitable for industrial control systems.
Featuring a 21 V DC electromagnetic coil and a single-pole changeover (SPDT) contact configuration, this relay enables a low-voltage control signal to switch a separate electrical load. Its changeover contact arrangement provides both normally open and normally closed switching functions, making it suitable for control circuits, automation interfaces and electrical switching assemblies.
With a 16 A rated contact current and a 250 V AC rated contact voltage, the Finder 40.61.9.021.4003 offers a practical solution for switching appropriately rated electrical loads, including lighting circuits, control equipment and industrial machinery. Its compact construction, robust electrical insulation and compatibility with suitable Finder relay mounting accessories support straightforward integration into electrical and electronic systems.
Key Advantages
- Compact 16 A miniature power relay designed for industrial electrical switching.
- 21 V DC nominal coil voltage for compatible low-voltage control circuits.
- Single-pole changeover (SPDT / 1 CO) contact provides flexible switching functionality.
- 250 V AC rated contact voltage suitable for industrial and commercial electrical applications.
- High electrical isolation between the control coil and switching contacts.
- Compact relay housing suitable for space-constrained electronic assemblies.
- Reliable electromagnetic switching with monostable, non-latching operation.
- PCB-compatible construction supports integration into electronic control equipment.
- Part of the established Finder 40 Series relay family.
Key Features
- Finder 40 Series miniature power relay.
- 21 V DC nominal electromagnetic coil.
- 16 A rated contact switching current.
- 1 CO (SPDT) changeover contact configuration.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage for the 40.61 series.
- 4,000 VA rated resistive switching capacity under AC1 conditions.
- 0.65 W nominal DC coil consumption for the standard 9.021 coil.
- 700 Ω nominal coil resistance.
- 30 mA nominal coil current.
- 15.3–31.5 V DC coil operating range under standard specified conditions.
- 6 kV coil-to-contact impulse withstand voltage for the series.
- 8 mm coil-to-contact creepage and clearance within the series design.
- Monostable, non-latching electromechanical operation.
- Compact PCB-compatible construction with a single changeover contact.
- Suitable for industrial control, electrical switching and automation applications.
Reliable Electrical Switching for Industrial Automation
Electromechanical relays such as the Finder 40.61.9.021.4003 operate by energising an electromagnetic coil to change the position of an electrical contact. This allows a low-voltage DC control circuit to switch a separate electrical load while providing galvanic isolation between the control and contact circuits.
The Finder 40.61 relay series is designed for applications requiring dependable electrical switching, compact installation and robust electrical insulation. Its single-pole changeover contact configuration supports normally open and normally closed control functions, making it suitable for industrial machinery, electronic interfaces and automated electrical systems. Correct selection of contact protection, wiring and load ratings helps maintain reliable operation throughout the relay's service life.
Typical Applications
- Industrial automation and machine control systems.
- Printed circuit board control assemblies.
- Electrical control panels and switching equipment.
- Industrial machinery and OEM automation systems.
- Lighting control and electrical switching circuits.
- Building automation and electrical installations.
- Electronic power supply and interface circuits.
- Packaging and production machinery.
- Commercial electrical equipment and control systems.
- Motor control and auxiliary switching circuits within the specified contact ratings.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Mounting Type | PCB | |
| Load Voltage | 400 V AC | |
| Switching Current (A) | 16 A | |
| Manufacturer | Finder | |
| Series | 40 Series Miniature PCB / Plug-in Relays | |
| Model | 40.61.9.021.4003 | |
| Product type | Electromechanical power relay | |
| Relay configuration | Single-pole changeover (SPDT / 1 CO) | |
| Number of poles | 1 | |
| Nominal coil voltage | 21 V DC | |
| Coil type | Standard DC electromagnetic coil | |
| Nominal coil power | 0.65 W | |
| Nominal coil resistance | 700 Ω | |
| Nominal coil current | 30 mA | |
| Coil operating voltage range | 15.3–31.5 V DC | |
| 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) | 1,000 VA (current series rating) | |
| Single-phase motor rating (230 V AC) | 0.55 kW | |
| Contact arrangement | 1 normally open and 1 normally closed contact with common terminal | |
| Relay operation | Monostable / non-latching | |
| Contact switching mechanism | Electromechanical | |
| Mechanical life | 10 million operations (40.61 series) | |
| Electrical life at rated AC1 load | 100,000 operations (40.61 series) | |
| Typical operate / release time | 7 / 3 ms (standard coil series) | |
| Coil-to-contact impulse withstand voltage | 6 kV (1.2/50 µs) | |
| Coil-to-contact creepage and clearance | 8 mm | |
| Dielectric strength between open contacts | 1,000 V AC | |
| Operating ambient temperature | −40 to +85 °C (standard series) | |
| Mounting type | PCB-compatible relay construction | |
| Series housing dimensions (H × W × D) | Approximately 25 × 12.4 × 29 mm | |
| Application category | Industrial automation and electrical switching |
Frequently Asked Questions
What is the Finder 40.61.9.021.4003 used for?
The Finder 40.61.9.021.4003 is a miniature electromechanical power relay designed to switch electrical loads in industrial automation, machinery control, electronic equipment and electrical control circuits.
What coil voltage does the Finder 40.61.9.021.4003 require?
The relay uses a 21 V DC nominal coil. The standard 9.021 DC coil specification provides an operating voltage range of approximately 15.3–31.5 V DC under the specified conditions.
What is the contact current rating of this relay?
The Finder 40.61 relay series features a 16 A rated changeover contact with a rated contact voltage of 250 V AC. The permissible switching current depends on the electrical load, switching duty and installation conditions.
What contact configuration does the Finder 40.61.9.021.4003 have?
The relay features a single-pole double-throw (SPDT) contact arrangement, also known as one changeover contact. This provides a common terminal, a normally open contact and a normally closed contact for flexible switching functions.
Where is the Finder 40.61.9.021.4003 typically installed?
The relay is suitable for integration into PCB-based electronic assemblies, industrial automation equipment and electrical control systems. The mounting arrangement and associated accessories must be selected to match the relay's terminal configuration and application requirements.
Trusted by Industrial Automation Professionals Worldwide
Finder 40 Series miniature power relays provide compact and dependable electrical switching for industrial automation, electronic equipment and electrical control applications. The Finder 40.61.9.021.4003 combines a 21 V DC electromagnetic coil with a 16 A single-pole changeover contact arrangement, offering a practical switching solution for machinery manufacturers, control panel builders and industrial automation engineers.
