AH3-NB Timer Relay 5A – 4 Ranges 3s-30m Panel

Quick Detail:

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

Description:

AH3-NB Compact Time Relay – Versatile Timing with Four Selectable Ranges

The AH3-NB is a compact, panel‑mount time relay engineered for precise delay control in industrial automation, building management, and process control applications. Featuring a universal AC/DC power supply, low power consumption, and a robust 5A output contact, this relay offers exceptional flexibility in a space‑saving 50×40 mm panel cutout. With four user‑selectable time ranges (3 seconds, 3 minutes, 30 seconds, and 30 minutes), the AH3‑NB can handle a wide variety of timing tasks – from short‑duration machine pulses to longer process intervals. Its lightweight design (≈100g), high insulation resistance, and long mechanical life make it an ideal choice for control panels, OEM equipment, and maintenance upgrades.

Universal Power Supply for Global Installation

The AH3‑NB 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 worldwide, 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 remarkably 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 densely populated panels.

Compact Panel‑Mount Design

Designed for front‑panel installation, the AH3‑NB requires a 50×40 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 rotary switch to select the desired time range from the four available options. The intuitive layout enables quick, tool‑free setting of the delay, reducing setup errors and training time.

Four Selectable Time Ranges for Maximum Flexibility

The AH3‑NB offers four independent time ranges, each continuously adjustable via a built‑in potentiometer. The ranges are:

· 3 seconds (e.g., adjustable from approximately 0.3 to 3 seconds) – ideal for short delays in packaging machinery, welding timers, or pulse stretching.
· 3 minutes (e.g., adjustable from 0.3 to 3 minutes) – suitable for conveyor belt sequencing, fan delay after motor stop, or short process holds.
· 30 seconds (e.g., adjustable from 3 to 30 seconds) – perfect for staircase lighting delay, compressor anti‑short cycle, or alarm silence timing.
· 30 minutes (e.g., adjustable from 3 to 30 minutes) – excellent for HVAC defrost cycles, pump alternation, or equipment soak times.

This selection covers a broad spectrum of industrial and commercial timing needs, allowing a single relay model to replace several dedicated timers. The user simply turns the range selector to the desired unit (seconds or minutes) and then adjusts the potentiometer to the exact delay required.

Robust Output Contact for Direct Load Switching

Equipped with a control output rated at 5A at 220V AC, the AH3‑NB 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‑NB 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.

Reliable Performance in Diverse Environments

The AH3‑NB 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 versatile time ranges of the AH3‑NB make it ideal for countless applications:

· Motor Control: Star‑delta starting (using 3s or 30s range), anti‑short cycling for compressors (30s range).
· Conveyor Systems: Delayed start of belt sections (3s to 30s), accumulation zone timing (3s to 3m).
· HVAC: Fan delay on/off (30s range), defrost timing (30m range), filter maintenance reminders (30m range).
· Lighting Control: Staircase lighting delay (30s range), corridor occupancy control (3m range), signage flashing.
· Pump Control: Alternating pump operation (30m range), well pump delay after power restoration (3m range).
· Industrial Machinery: Welding timers (3s range), cooling fan delays (30s to 3m), batch process timing (30m range).
· Test Equipment: Aging tests, vibration table cycles, data logging intervals.
· Power Systems: Auto‑reclosing delay (3s range), backup power transfer timing.

Easy Installation and Operation

Mounting the AH3‑NB is straightforward: cut a 50×40 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 time range using the front‑panel rotary switch, 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‑NB 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 with four selectable time ranges (3s, 3m, 30s, 30m). Its high insulation resistance, dielectric strength, and long mechanical life ensure reliable operation in demanding industrial environments. Whether you need a precise 3‑second delay for a packaging line or a 30‑minute cycle for an HVAC defrost system, the AH3‑NB delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking an affordable, versatile, and durable timing solution, the AH3‑NB 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.