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Siemens 7PU4520-2BJ30 Solid-State Time Delay Relay - Off-Delay

Siemens 7PU4520-2BJ30 solid-state off-delay time relay.

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ManufacturerSiemens

Part number7PU4520-2BJ30

Type Off-Delay Time Relay

Voltage AC 100-127V 50/60Hz / DC 100-127V

Time Range 0.05s - 100s (7 ranges)

Width 22.5mm

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Solid-state reliability Wide time adjustment range Off-delay function Compact 22.5mm width LED status indicator No auxiliary voltage required

Product description

The Siemens 7PU4520-2BJ30 is a solid-state time relay designed for off-delay functions in industrial control circuits. This unit operates without an auxiliary voltage and features a wide time range from 0.05 seconds to 100 seconds, adjustable across 7 different ranges. It is powered by AC 100-127V at 50/60Hz or DC 100-127V and includes an LED indicator for status monitoring. The relay has a narrow 22.5mm width, making it suitable for space-constrained control panels.

This time relay is commonly used in applications requiring precise timing control for switching operations, such as motor control, conveyor systems, pump sequencing, and general machine automation. Its solid-state design ensures reliability and long operational life compared to electro-mechanical relays. The off-delay function is critical in scenarios where a circuit needs to remain active for a specific duration after a trigger signal is removed.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 7PU4520-2BJ30 time relay. We provide access to quality industrial automation components, helping you maintain and upgrade your systems efficiently. Rely on Stanlo Automation for dependable surplus parts and dedicated customer support to minimize your operational interruptions.

Technical specifications

Type	Off-Delay Time Relay
Voltage	AC 100-127V 50/60Hz / DC 100-127V
Time Range	0.05s - 100s (7 ranges)
Width	22.5mm
Auxiliary Voltage	None
Output	Solid-State
Indicator	LED

Common applications

Motor control

Conveyor systems

Pump control

HVAC systems

Machine sequencing

Control panel timing

Automation circuits

Compatible systems

PLC systems Control panels Motor starters Industrial automation circuits Machine control interfaces

Also known as

Siemens Off-Delay Timer 7PU4520 Relay Siemens 22.5mm Timer

Replaces / compatible with

Replaces older electro-mechanical off-delay timers requiring higher power consumption or offering less precision. Compatible with standard DIN rail mounting.

Technical note

Expert tip

The absence of an auxiliary voltage requirement simplifies wiring, but ensure the control input voltage matches the specified operating range for reliable triggering.

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Frequently asked questions

What is the voltage range for the Siemens 7PU4520-2BJ30 time relay?

The Siemens 7PU4520-2BJ30 time relay operates with a voltage range of AC 100-127V at 50/60Hz or DC 100-127V. It does not require a separate auxiliary voltage supply.