Name: 3RH21401HB40 COUPLING RELAY 4NO DC 24V SCREW
Brand: Siemens
SKU: 3RH21401HB40
Price: 91.16 USD
Availability: InStock
Rating: 4.9 (2 reviews)

Question 1

What is the Mfr

Accepted Answer

Mfr refers to the component's producing company, whose brand and manufacturing processes directly impact the component's performance, consistency, and traceability, making it a key reference during selection.

Question 2

What is the Series

Accepted Answer

Series indicates a manufacturer’s organized range of components, often named with a common prefix or code, to streamline product selection and ensure compatibility across similar models.

Question 3

What is the Package

Accepted Answer

his term denotes the protective casing (often made of plastic, ceramic, or metal) that encapsulates an integrated circuit, determining its size, reliability, and suitability for different mounting technologies like through-hole or SMT.

Question 4

What is the Base Product Number

Accepted Answer

By using the Base Product Number, manufacturers and customers can efficiently communicate about component families without detailing every specification, streamlining the procurement process.

Question 5

What is the Contact Material

Accepted Answer

Contact Material refers to the specific metal or alloy used at the interface where two conductors meet to establish an electrical path in connectors, switches, or relays. Its core properties include conductivity (affecting contact resistance), hardness (a

Question 6

What is the Contact Form

Accepted Answer

Contact Form refers to the mechanical configuration and circuit state relationship of contacts inside a relay or switch, such as Normally Open, Normally Closed, etc.

Question 7

What is the Contact Rating (Current)

Accepted Answer

Contact Rating (Current) is the maximum current a contact can safely make, carry, and break, measured in Amperes (A).

Question 8

What is the Switching Voltage

Accepted Answer

Switching Voltage is the circuit voltage across which the contacts can reliably switch without arcing or damage.

Question 9

What is the Must Release Voltage

Accepted Answer

Must Release Voltage (or Drop-Out Voltage) is the maximum coil voltage below which a relay is guaranteed to de-energize and its contacts will return to their un-operated state. It ensures the relay turns off reliably when power is reduced or removed.

Question 10

What is the Must Operate Voltage

Accepted Answer

Must Operate Voltage (or Pull-In Voltage) is the minimum coil voltage at which a relay is guaranteed to energize and its contacts will switch to their operated state. It ensures the relay turns on reliably even when the supply voltage is at the lower end

Question 11

What is the Operate Time

Accepted Answer

Operate Time is the time interval from the moment power is applied to the relay coil until the contacts have settled into their fully operated (switched) position. It includes pull-in time and contact bounce time, typically measured in milliseconds (ms).

Question 12

What is the Release Time

Accepted Answer

Release Time is the time interval from the moment power is removed from the relay coil until the contacts have returned to and settled in their initial (de-energized) state. It is typically measured in milliseconds (ms) and can be affected by the core's r

Question 13

What is the Coil Power

Accepted Answer

This parameter specifies the electrical power, measured in Watts (W) or Volt-Amperes (VA), required to energize the electromagnetic coil of a relay, solenoid, contactor, or similar actuator. It determines the necessary drive circuit capability to generate

Question 14

What is the Coil Resistance

Accepted Answer

It is the DC resistance of the wire winding within an inductive component, measured in Ohms (Ω). This inherent parasitic property causes power loss (I²R heating) and reduces the component's quality factor (Q). It is a critical parameter for calculating DC

Question 15

What is the Product Status

Accepted Answer

Product Status indicates the commercial availability and production stage of the component, such as Active, Not for New Design (NRND), Obsolete, or Last Time Buy (LTB).

Question 16

What is the Operating Temperature

Accepted Answer

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the powe

Question 17

What is the Termination Style

Accepted Answer

This parameter specifies the physical form and connection method of a component's leads or contacts, such as through-hole, surface-mount, screw terminal, or quick-connect. It defines the required assembly process (e.g., soldering, clamping) and is critica

Question 18

What is the Features

Accepted Answer

These are the additional, non-core capabilities or characteristics integrated into a component beyond its primary function. They enhance performance, reliability, or ease of use, such as built-in protection (thermal shutdown, overcurrent), enable/disable

Question 19

What is the Mounting Type

Accepted Answer

Mounting Type refers to the standardized classification of the method by which an electronic component or module is physically secured and electrically connected to a printed circuit board, chassis, or panel. It defines how the component integrates into t

Question 20

What is the Coil Voltage

Accepted Answer

The nominal DC or AC voltage required to energize the electromagnetic coil of a relay, solenoid, or contactor, establishing the magnetic field necessary for its operation. This specification, measured in volts (V), is critical for selecting a compatible d

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