AH3-B Timer Relay 5A – Universal Panel Mount Delay

Quick Detail:

1. Timer relay,delay-on-break relay,digital time relay
2. Used for control of time order

Description:

AH3-B Compact Time Relay – Wide Voltage, Low Power, Reliable Panel-Mount Timing Control

The AH3-B is a compact, high-performance time relay designed for a wide range of industrial automation, building management, and process control applications. Engineered with a universal power supply, low power consumption, and a robust 5A output contact, this relay offers exceptional flexibility and reliability in a space‑saving panel‑mount package. Its 40×50 mm installation cutout and lightweight construction (≈100g) make it ideal for control panels, OEM machinery, and test equipment where space is at a premium. Whether you need to introduce a precise delay for motor starting, conveyor sequencing, lighting control, or HVAC fan cycling, the AH3-B delivers consistent, repeatable performance in demanding environments.

Universal Power Supply for Global Use

The AH3-B operates on an extremely wide voltage range: DC12V‑48V and AC12V‑380V (50Hz). This universal compatibility allows the relay to be used in virtually any control system, from low‑voltage DC logic circuits (e.g., PLC outputs, battery‑backed systems, sensors) to standard AC mains up to 380V. This eliminates the need for multiple relay models for different voltages, simplifying inventory and reducing costs. The power consumption is impressively low: DC1.0W / AC1.0VA, which minimizes heat generation inside enclosures and reduces the load on control circuits, making it suitable for energy‑sensitive applications and dense control panels.

Compact Panel‑Mount Design

Designed for front‑panel installation, the AH3-B requires a 40×50 mm mounting hole – a compact footprint that allows high‑density placement on control cabinets, machine consoles, or portable test boxes. Weighing only ≈100g, it is lightweight yet robust. The front panel features a clear adjustment dial and a selector for the rated time range, enabling quick, tool‑free setting of the desired delay. The intuitive layout reduces setup errors and training time, making it accessible for both experienced engineers and operators.

Robust Output Contact for Direct Load Switching

Equipped with a control output rated at 5A at 220V AC, the AH3‑B can directly switch a variety of loads, including contactor coils, solenoid valves, small motors, indicator lamps, fans, and resistive heaters. The output contact is designed for long‑term reliability, with a mechanical life of 10⁷ operations and an electrical life of 10³ operations at rated load. This durability makes it suitable for high‑cycle applications such as packaging machinery, conveyor systems, and repetitive industrial processes.

High Insulation and Dielectric Strength for Safety

Safety is paramount in any electrical installation. The AH3‑B offers an insulation resistance of ≥100MΩ at DC500V, ensuring excellent isolation between the power supply, timing circuit, and output contact. Dielectric strength is rated at 1500V AC between coil/electronics and contacts (BCC) and 1000V AC between open contacts (BOC), guaranteeing protection against voltage surges and reducing the risk of arcing or breakdown. These characteristics make the relay suitable for use in industrial environments where electrical noise and transients are common.

Flexible Time Adjustment

The AH3‑B provides a wide, user‑adjustable timing range (specific ranges are selected via front‑panel switches; typical models offer ranges from 0.1 seconds to 30 hours or more, depending on the version). The time setting is achieved using a built‑in potentiometer and a range selector, allowing the user to fine‑tune the delay precisely for the application. This flexibility enables a single relay to handle short delays (e.g., 0.1‑1s for pulse stretching) as well as long delays (e.g., 1‑30h for irrigation or maintenance reminders). The clear labeling of time units (seconds, minutes, hours) prevents confusion and ensures correct setup.

Reliable Performance in Diverse Environments

The AH3‑B is built to operate reliably under typical industrial conditions:

· Operating temperature: -10°C to +50°C – suitable for unheated workshops, outdoor enclosures, and climate‑controlled rooms.
· Humidity: 35% to 85% (non‑condensing) – performs well in most environments without risk of moisture damage.

These specifications ensure stable timing accuracy and long life even in moderately demanding settings.

Typical Applications

The versatility of the AH3‑B makes it ideal for countless applications:

· Motor Control: Star‑delta starting, sequential starting of multiple motors, anti‑short cycling for compressors.
· Conveyor Systems: Delayed start/stop of belt sections, accumulation zone timing.
· HVAC: Fan delay on/off, defrost timing, filter maintenance reminders.
· Lighting Control: Staircase lighting delay, corridor occupancy control, signage flashing.
· Pump Control: Alternating pump operation, well pump delay after power restoration.
· Industrial Machinery: Welding timers, cooling fan delays, batch process timing.
· Irrigation & Agriculture: Automated watering cycles using hour‑range settings.
· Test Equipment: Aging tests, vibration table cycles, data logging intervals.
· Power Systems: Auto‑reclosing delay, backup power transfer timing.

Easy Installation and Operation

Mounting the AH3‑B is straightforward: cut a 40×50 mm rectangular hole in the panel, insert the relay, and secure it with the included brackets. Connect the power supply (DC12‑48V or AC12‑380V) and the load to the appropriate terminals. Select the desired time range using the selector, then rotate the adjustment dial to the exact delay required. No complex programming or external tools are needed. The clear terminal labeling and logical layout minimize wiring errors and reduce installation time.

Conclusion

The AH3‑B Compact Time Relay combines a space‑saving panel‑mount design, universal AC/DC power supply (12‑380V AC / 12‑48V DC), low power consumption, and a robust 5A output into a single, easy‑to‑use device. Its high insulation resistance, dielectric strength, and long mechanical life ensure reliable operation in demanding industrial environments. Whether you need a precise short delay for a packaging line or a long‑duration cycle for an irrigation system, the AH3‑B delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking an affordable, versatile, and durable timing solution, the AH3‑B is the perfect choice. Install it once and enjoy years of dependable service.

Applications:

Specifications:

Time range

Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership

With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications

Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability

Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.