Overview
The 4N37M is a general-purpose optocoupler produced by ON Semiconductor. It consists of a gallium arsenide infrared emitting diode driving a silicon phototransistor, housed in a standard 6-pin dual-in-line package. This component is designed to provide electrical isolation between the input and output circuits, making it suitable for various applications requiring signal isolation and safety.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Working Insulation Voltage (VIORM) | 850 | Vpeak |
| Highest Allowable Over-Voltage (VIOTM) | 6000 | Vpeak |
| External Creepage | ≥7 | mm |
| External Clearance | ≥7 | mm |
| Input-Output Isolation Voltage (VISO) | 4170 | VAC RMS (1 minute) |
| Isolation Capacitance (CISO) | 0.2 | pF (VI-O = 0 V, f = 1 MHz) |
| Isolation Resistance (RISO) | >10^11 | Ω (VI-O = ±500 VDC, TA = 25°C) |
| Storage Temperature (TSTG) | -40 to +125 | °C |
| Operating Temperature (TOPR) | -40 to +100 | °C |
| Junction Temperature (TJ) | -40 to +125 | °C |
| DC / Average Forward Input Current (IF) | 60 | mA |
| Collector-to-Emitter Breakdown Voltage (BVCEO) | 30 to 100 | V |
| Collector-to-Emitter Saturation Voltage (VCE(SAT)) | 0.3 | V (IC = 0.5 mA, IF = 10 mA) |
| Non-Saturated Turn-on Time (TON) | 2 to 10 | µs (IF = 10 mA, VCC = 10 V, RL = 100 Ω) |
| Turn-off Time (TOFF) | 2 to 10 | µs (IF = 10 mA, VCC = 10 V, RL = 100 Ω) |
Key Features
- High Isolation Voltage: Up to 850 V peak working insulation voltage and 6000 V peak over-voltage capability.
- Safety and Regulatory Approvals: Compliant with UL1577, 4170 VAC RMS for 1 minute, and DIN-EN/IEC60747-5-5 standards.
- High Current Transfer Ratio: Minimum current transfer ratio of 100% at IF = 10 mA and VCE = 10 V for the 4N37M model.
- Fast Switching Times: Non-saturated turn-on and turn-off times as low as 2 microseconds.
- Wide Operating Temperature Range: Operating temperature from -40°C to +100°C.
Applications
- Power Supply Regulators: Used to isolate control signals in power supply circuits.
- Digital Logic Inputs: Suitable for isolating digital logic signals to prevent noise and interference.
- Microprocessor Inputs: Used to isolate microprocessor inputs from external signals to ensure reliable operation.
Q & A
- What is the maximum working insulation voltage of the 4N37M optocoupler?
The maximum working insulation voltage is 850 V peak.
- What are the safety and regulatory approvals for the 4N37M?
The 4N37M is compliant with UL1577, 4170 VAC RMS for 1 minute, and DIN-EN/IEC60747-5-5 standards.
- What is the minimum current transfer ratio for the 4N37M model?
The minimum current transfer ratio is 100% at IF = 10 mA and VCE = 10 V.
- What are the typical turn-on and turn-off times for the 4N37M?
The non-saturated turn-on and turn-off times are typically between 2 to 10 microseconds.
- What is the operating temperature range for the 4N37M?
The operating temperature range is from -40°C to +100°C.
- What is the maximum DC forward input current for the 4N37M?
The maximum DC forward input current is 60 mA.
- What is the collector-to-emitter breakdown voltage for the 4N37M?
The collector-to-emitter breakdown voltage is between 30 to 100 V.
- What is the collector-to-emitter saturation voltage for the 4N37M?
The collector-to-emitter saturation voltage is 0.3 V at IC = 0.5 mA and IF = 10 mA.
- What are some common applications for the 4N37M optocoupler?
Common applications include power supply regulators, digital logic inputs, and microprocessor inputs.
- How does the 4N37M ensure electrical isolation?
The 4N37M ensures electrical isolation through its gallium arsenide infrared emitting diode and silicon phototransistor, providing high isolation voltage and resistance.
