Relay SRD-05VDC-SL-B, 5V DC/250V AC, 10A

The Songle SRD-05VDC-SL-B relay is an electromagnetic switching element for use in control and power circuits. It serves for the separate control of a load using a coil powered by a 5 V direct current voltage. It is designed for mounting into printed circuit boards and for applications where it is necessary to switch an electrical circuit using a relay contact.

Technical specifications

• Model: SRD-05VDC-SL-B
• Series: SRD
• Component type: electromagnetic relay
• Nominal coil voltage: 5 V DC
• Contact configuration: 1 Form B, normally closed contact NC
• Mounting: into a printed circuit board
• Nominal contact current: 10 A
• Switched contact voltage: 250 V AC for resistive load
• Switched contact voltage: 30 V DC for resistive load

Functions and features

• The relay allows control of the load circuit using a separate low-voltage coil circuit.
• The SL-B variant uses a normally closed contact, which is closed in the idle state and opens after switching on the coil.
• The design is intended for soldering into a printed circuit board.
• The electromagnetic principle ensures galvanic isolation between the coil and the contact circuit.
• The contact is designed for switching a resistive load within the limits of nominal values.

Ideal for

• Control and automation circuits with a coil powered by 5 V DC.
• Switching and disconnecting resistive loads using a relay contact.
• Design and repair of printed circuit boards.
• Laboratory, development, and service use in electrical engineering.
• Applications requiring a normally closed contact in the idle state.

Package contents

• Relay SRD-05VDC-SL-B.

Why choose this product

• The specific type designation allows unambiguous classification into the Songle SRD series.
• The coil with 5 V DC power supply is suitable for low-voltage control circuits with a corresponding driver stage.
• The NC normally closed contact is suitable for connections where the circuit should be closed in the idle state.
• The design for PCB facilitates firm mechanical and electrical integration into an electronic device.

Installation and operation instructions

• Connect the relay only according to the wiring diagram for the specific SRD-05VDC-SL-B variant.
• Power the coil with a 5 V direct current voltage and use a suitable driver element if the control circuit does not supply the required current directly.
• When switching inductive loads, use appropriate protective elements against voltage spikes.
• On the printed circuit board, maintain sufficient insulation distances between the control and load parts of the circuit.
• Perform soldering in such a way as to prevent thermal damage to the relay housing or terminals.

Safety warnings

• The relay may only be used within the limits of the nominal values of the contacts and coil.
• When working with mains voltage, there is a risk of electric shock; installation must be performed by a person with appropriate electrical engineering qualifications.
• Before connection, modification, or soldering, the device must be disconnected from the power supply.
• Incorrect connection of the contacts or coil leads to a risk of short circuit, overheating, damage to the relay, or damage to the connected device.
• Do not use the relay for loads exceeding the specified nominal values or for safety functions without an appropriate design of the entire device.