STEA-180-1B

• Compact size and lightweight.

• High reliability and low price.

• Wide input voltage range.

• High conversion efficiency and low operating temperature rise.

• Built-in filter circuit, minimizing external radiated interference.

• Basic protection circuitry, providing good environmental adaptability.

• 4-hour, 100% full load aging and full-series functional testing.

Features
Model
Parameters

STEA-180-1B

Output Interface Location

The seven-position 9.5-7P terminal block is labeled OUTPUT: GND, GND, +24V, +24V

Rated Output Voltage

DC：+24V

Output Voltage Range

Setting error < ±5%

Rated Output Current

Rated current 7.8 A; range 0–7.5 A.

Output Voltage Ripple

Vnor＜100mv  Vp_p100Hz＜80mv  VP-Pmax＜240mv

Li;Lo Regulation

Line: ±0.5%, Load: ±3%

Overall Voltage Regulation Accuracy

±5%

Rated Output Power

180W

Rated Operating Efficiency

≈80%

Rated Input Voltage

Rated voltage: AC 220V ±15%; operating voltage: AC 220V ±30%. Interface: 7-pin terminal block (9.5 mm pitch) with markings INPUT: AC-L, AC-N, FG.

Rated Input Current

Rated current: AC 1.0A; current range: AC 0.6A–1.5A.

AC Input Frequency

Rated AC voltage frequency range 47～63Hz, sine wave

Inrush Current

Inrush current surge on the power grid at the moment of energization: maximum value during cold start-up is 20 A for 10 ms.

Input voltage protection

Rated voltage 220V ±15% – interface location

Output Overload Protection

The overload protection threshold is approximately 120% of the rated output current, utilizing a constant-current/voltage-reduction protection method; short-circuit protection operates by shutting down the unit upon detecting a voltage drop, and recovery requires resetting the input.

Output undervoltage protection

The undervoltage protection threshold is approximately AC 150V ±5V, at which point the power supply enters a recoverable shutdown state (requiring an input reset); the overvoltage protection threshold is AC 300V ±5V, at which point the power supply enters a non-recoverable shutdown state.

Overheat protection

The over-temperature protection threshold is 85°C ± 5°C, utilizing an automatic shutdown mode. Normal operation resumes when the unit temperature drops below 50°C ± 3°C.

Multi-unit series/parallel operation

Allows multiple units from the same series to be connected in series.

Power supply timing parameters

Setup time ≈ 200 ms; rise time ≈ 50 ms; hold-up time ≈ 20 ms.

Isolation voltage parameters

[Input-Output: AC 1.5 kV; Input-Case: AC 1.5 kV; Output-Case: AC 0.5 kV] 50 Hz, 1-minute withstand test: leakage current < 5 mA.

Operating temperature parameters

The operating temperature drift coefficient is approximately ±0.03%/°C; the absolute temperature rise coefficient is approximately 0.3°C/W; and at rated output power, the absolute temperature rise of the unit is 25°C ± 5°C.

Environmental conditions parameters

Storage environment: -20°C to +85°C; 10% to 95% RH. Operating environment: -10°C to +50°C; 20% to 90% RH (varies depending on usage environment and power).

Cooling method

Designed for continuous operation with natural cooling (actual power output is influenced by the operating environment and installation location).

External dimensions and mounting dimensions

Dimensions: L159 × W98 × H47 mm; Maximum dimensions: L160 × W100 × H48 mm; Mounting dimensions: L150 × W85 (33) mm, L149 × W10 mm.

Net weight and color

Total weight is approximately 500g; the bottom casing is made of 2mm-thick aluminum with a black anodized finish, while the top cover is made of 0.8mm-thick iron with a black electro-coated finish.

Design standards

National Standards GB-4943; GB-9254

Notes: 1) The above parameters are measured under the following conditions: rated input voltage and rated output load range; ambient temperature of 25°C and 85% RH; and still-air conditions.

2) Output DC voltage ripple measurement: Measured at the test point using a 30 cm long, 1 mm² cross-section twisted-pair wire bypassed with 0.1 μF and 0.47 μF capacitors; measurements cover the maximum peak-to-peak value of the 100 Hz fundamental frequency ripple (Vp-p100Hz) and the maximum peak-to-peak value of the combined ripple (Vp-pmax).

3) Line regulation (Li): Measured at rated load while the input voltage varies within the rated range; Load regulation (Lo): Measured at rated input voltage while the load varies from zero to the rated value.