It is a LM317 Adjustable Power Supply Module, Input Voltage: DC 3V~ 35V or AC0- 28V, Output voltage: DC 1.25~32V can adjust continuously, Output current: 5mA~1.5A, Suitable for Suitable for DIY an adjustable voltage regulated power supply, Industrial equipment Voltage convert, Power Supply Transformers etc.

LM317 is three-terminal adjustable regulator integrated circuit early made by National Semiconductor and widely used in many integrated circuit manufacturers. Easily use , it just need two external resistance to set output voltage. Besides, its linear adjusting ratio and rejection ratio is better than the standard fixed regulators.

• 1. Adopted two original LM317 big chip in parallel, make the output current increase 1 time, the highest short-circuit current can reach 4.5A.
• 2. The input part adopts 6A flat bridge to create the bridge rectifier. It can input DC or AC and no need to distinguish between the positive and the negative.
• 3. The load protection can prevent regulator from ageing and damaged and lead to burn down as suddenly rising voltage.
• 4. The high precision digital display voltmeter is convenience to view during the process of adjusting voltage, and no need to use additional multimeter to test.
• 5. Used large volume heat sink which is cooling well, more stable and durable.

• Input voltage: DC 35V(Max), AC 28V(Max).
• Output voltage: DC 1.25~32V, can adjust continuously.
• the max voltage error: DC 40V
• The min voltage error: DC 3V
• Output current: 5mA~1.5A
• Load current: recommend 5mA~3A
• Short-circuit current: 4~4.5A
• Internal protection: over-heat, over-load, short-circuit
• External protection: the external adds load protection to protect circuit.
• Working temperature: -10~+85℃
• Save temperature：-65℃~+150℃
• Typical linear adjusting ratio: 0.01%  
• Typical load adjusting ratio: 0.1%
• Ripple rejection ratio: 80dB
• Product size: 76*57*33mm

• 1 x  Parallel Type Voltage Regulated Power Panel ( Adjustable Power Supply Module )