JSM8-A Timer 5A – 15 Ranges 1s-5h Panel Mount

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Description:

JSM8-A Compact Time Relay – Versatile Timing with 15 Selectable Ranges

The JSM8-A is a compact, panel‑mount time relay engineered to deliver precise and reliable delay control across a wide spectrum of industrial, commercial, and automation applications. Featuring a universal AC/DC power supply (DC12‑48V and AC24‑220V 50Hz), low power consumption, and a robust 5A output contact, this relay offers exceptional flexibility in a space‑saving 45×45 mm panel cutout. With fifteen selectable time ranges – covering seconds (1s, 5s, 10s, 30s, 60s), minutes (2m, 3m, 5m, 6m, 12m, 30m, 60m), and hours (5h) – the JSM8‑A can handle everything from short machine pulses to long‑duration cycles in HVAC, lighting, motor control, and process automation. Its robust construction, high insulation resistance, and long mechanical life make it an ideal choice for control panels, OEM equipment, and field upgrades worldwide.

Universal Power Supply for Global Deployment

The JSM8‑A operates on a wide voltage range: DC12V‑48V and AC24V‑220V (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 (24V, 110V, 220V). 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 JSM8‑A requires a 45×45 mm mounting hole – one of the most compact footprints in its class, allowing high‑density placement on control cabinets, machine consoles, or portable test boxes. Weighing 150g, it is lightweight yet sturdy. The front panel features a clear adjustment dial and a rotary switch to select the desired time range from the fifteen available options. The intuitive layout enables quick, tool‑free setting of the delay, reducing setup errors and training time.

Fifteen Selectable Time Ranges for Maximum Flexibility

The JSM8‑A offers fifteen independent time ranges, each continuously adjustable via a built‑in potentiometer. The available ranges are:

Time Range Time Range Time Range
1 second 5 seconds 10 seconds
30 seconds 60 seconds 2 minutes
3 minutes 5 minutes 6 minutes
12 minutes 30 minutes 60 minutes
5 hours 5 minutes (duplicate) 10 minutes
30 minutes (duplicate)

(Note: The listed ranges cover seconds, minutes, and hours, providing a broad spectrum of timing options. The duplicate entries in the original specification indicate that the relay may offer multiple scale options for certain ranges.)

This broad selection covers a wide spectrum of industrial and commercial timing needs – from brief 1‑second delays in packaging machinery to 5‑hour cycles in HVAC defrost or irrigation systems. The user simply turns the range selector to the desired unit (seconds, minutes, or hours) 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 JSM8‑A 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 JSM8‑A 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 JSM8‑A 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 JSM8‑A make it ideal for countless applications:

· Motor Control: Star‑delta starting (using 1‑10 seconds), anti‑short cycling for compressors (30‑60 seconds).
· Conveyor Systems: Delayed start of belt sections (1‑10 seconds), accumulation zone timing (5‑30 seconds).
· HVAC: Fan delay on/off (30‑60 seconds), defrost timing (5‑30 minutes), filter maintenance reminders (5 hours).
· Lighting Control: Staircase lighting delay (1‑30 seconds), corridor occupancy control (2‑12 minutes), signage flashing.
· Pump Control: Alternating pump operation (12‑60 minutes), well pump delay after power restoration (3‑12 minutes).
· Industrial Machinery: Welding timers (1‑5 seconds), cooling fan delays (30‑60 seconds), batch process timing (5‑30 minutes).
· Irrigation & Agriculture: Automated watering cycles (5 hours).
· Test Equipment: Aging tests, vibration table cycles, data logging intervals.

Easy Installation and Operation

Mounting the JSM8‑A is straightforward: cut a 45×45 mm square hole in the panel, insert the relay, and secure it with the included brackets. Connect the power supply (DC12‑48V or AC24‑220V) 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 JSM8‑A Compact Time Relay combines a space‑saving 45×45 mm panel‑mount design, universal AC/DC power supply (24‑220V AC / 12‑48V DC), low power consumption, and a robust 5A output with fifteen selectable time ranges covering seconds, minutes, and hours. Its high insulation resistance, dielectric strength, and long mechanical life ensure reliable operation in demanding industrial environments. Whether you need a precise 1‑second delay for a packaging line or a 5‑hour cycle for an HVAC system, the JSM8‑A delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking an affordable, versatile, and durable timing solution, the JSM8‑A is the perfect choice. Install it once and enjoy years of dependable service.

Applications:

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.