Chint JSS48A-2Z 8-pin power-on delay time relay

Chint JSS48A-2Z is an 8-pin power-on delay time relay equipped with two sets of changeover contacts (2Z). It is suitable for timing control in scenarios such as industrial automation and smart homes.

 I. Core Parameters and Functions

1. Delay Characteristics

- Delay Range: Covers 0.01 seconds to 99 hours and 99 minutes, supporting multi-range adjustment (e.g., 0.01s~99.99s, 1min~99h99min). The delay can be quickly set via the panel DIP switches or knobs.

- Accuracy: ≤1%, ensuring the reliability of timing control.

2. Electrical Specifications

- Power Supply Voltage: Supports AC/DC 24V~48V, AC/DC 100V~240V, AC220V, and AC380V (50Hz), featuring strong wide-voltage compatibility.

- Contact Capacity: AC-15 240V/0.75A (inductive load), DC-13 220V/0.27A, with a rated heating current of 5A. It can directly drive small contactors or solenoid valves.

3. Structural Design

- Installation Method: Supports panel mounting and DIN rail mounting (requires CZS08C or CZF11A-E base). It is compatible with standard 35mm DIN rails, saving space.

- Dimensions: Panel size is 48×48mm, cutout size is 45×45mm, and length is 104mm. It is equipped with a transparent protective cover to prevent accidental contact.

 II. Typical Application Scenarios

1. Industrial Automation

- Motor Control: For example, delay control of conveyor belt start and stop to avoid current surges caused by simultaneous startup of multiple motors.

- Equipment Protection: Cooperates with sensors to realize delayed shutdown after fault alarm, reserving maintenance time.

2. Smart Home and Building

- Lighting System: Enables timed switching or scene switching (e.g., automatic dimming at night).

- HVAC Control: Timed pre-heating/cooling of air conditioners and water heaters to improve energy efficiency.

3. Experiment and Testing

- Periodic start-stop control of laboratory equipment, or simulation of long-term operation tests.

 III. Usage and Wiring

1. Wiring Example

- Power Input: The AC220V model is directly connected to L/N; the DC24V model requires distinction between positive and negative poles.

- Contact Output: Normally closed contacts (e.g., terminals 4, 5) close immediately after power-on and open after the delay ends; normally open contacts (e.g., terminals 3, 6) close with a delay.

- Reset Function: Forced stop of timing and reset can be achieved by short-circuiting the reset terminal with an external signal.

2. Operation Interface

- Time Setting: Select the time unit (S for second/M for minute/H for hour) and specific value via panel DIP switches or knobs. The nixie tube or indicator light displays the countdown in real time.

- Anti-counterfeiting Verification: The barcode on the side supports mobile phone scanning to verify authenticity, ensuring genuine products.

 IV. Performance and Reliability

1. Environmental Adaptability

- Operating Temperature: -5℃~+40℃, suitable for most industrial environments.

- Protection Level: IP40 (dust-proof), preventing dust from affecting internal circuits.

2. Service Life Indicators

- Mechanical Life: 1×10⁶ operations, resistant to frequent actions.

- Electrical Life: 1×10⁵ operations, meeting long-term use requirements.

3. Certification and Compliance

- It has passed the CCC certification and complies with the GB/T 14048.5 standard, ensuring safety and reliability.

 V. Price and Purchase Recommendations

1. Market Price

- Domestic Channels: The quoted price on platforms such as Taobao and Alibaba is approximately 58~65 RMB (the price may be lower for bulk purchases). Please pay attention to distinguishing voltage specifications (e.g., AC220V, DC24V).

- International Channels: The quoted price from overseas distributors is approximately 52.5~60 USD, and transportation costs need to be considered.

2. Comparison of Alternative Models

- Omron H3Y-2: Priced at approximately 65 RMB, with a delay range of 0.1s~60s, suitable for short-time control. However, its contact life (400,000 operations) is lower than that of JSS48A-2Z.

- Chint NTE8 Series: A new product in 2025, supporting more precise short delays of 0.1s~5s, but with relatively single functions. It is recommended to prioritize the versatility of JSS48A-2Z.

 VI. Precautions

1. Load Matching

- When driving high-power loads (e.g., motors), it is recommended to use an intermediate relay to expand the contact capacity.

2. Installation Environment

- Avoid use in environments with strong magnetic fields or high humidity to prevent interference or corrosion.

3. Alternative Compatibility

- When replacing, it is necessary to confirm the pin definition (e.g., 8-pin vs. 11-pin), as the bases of some models are not universal.

 VII. Summary

With its wide voltage range, high-precision delay, and flexible installation methods, Chint JSS48A-2Z has become a cost-effective choice for industrial and civil timing control. Whether in automated production lines or smart homes, it can provide a stable and reliable time management solution. When purchasing, it is recommended to obtain technical support and after-sales service through official channels to maximize product performance.