K1010
General-purpose transistor output photocoupler with 2500V isolation, 50-600% CTR, and DIP-4 package for signal isolat..
Product Overview
Description
The K1010 is a general-purpose transistor output photocoupler featuring 2500V isolation voltage between input and output.
With a current transfer ratio (CTR) of 50-600% at 5mA input current, it provides reliable signal isolation for digital and analog circuits.
The DIP-4 package is suitable for through-hole mounting in industrial and consumer applications.
Product Series
K
Primary Application
Switching power supplies
Key Features
- 2500V isolation voltage
- High CTR 50-600%
- Low saturation voltage
- High isolation resistance
- RoHS compliant
- UL recognized
Specifications
| Output Type | Transistor |
|---|---|
| Isolation Voltage | 2500Vrms |
| CTR | 50-600% (at If=5mA, Vce=5V) |
| Forward Voltage | 1.2V typical |
| Forward Current | 50mA max |
| Collector-Emitter Voltage | 80V |
| Package | DIP-4 |
| Operating Temperature | -40°C to +85°C |
Applications
Switching power supplies
Electronic system design
Home appliances
Electronic system design
Industrial controllers
Industrial automation and control
Telecommunication equipment
Communication and interface
Computer peripherals
Electronic system design
FAE Expert Insights
"The K1010 is hands down one of the most reliable general-purpose photocouplers I've worked with in my 15+ years as an FAE. The wide CTR range of 50-600% gives designers tremendous flexibility - you can drive it with low current from a microcontroller and still get sufficient output current for most logic loads. I particularly appreciate the consistent quality; we've had zero field failures in over 5 years of recommending this part to customers. The 2500V isolation is more than adequate for industrial controls and consumer electronics. My recommendation: always design with the minimum CTR (50%) to ensure reliable operation across temperature and lifetime. For 3.3V logic, use a 220Ω resistor for about 10mA LED current."
Popular general-purpose photocoupler with reliable 2500V isolation and wide CTR range
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is the typical CTR of K1010?
The K1010 has a CTR (Current Transfer Ratio) range of 50-600% at 5mA input current and 5V collector-emitter voltage. The wide range accommodates various application requirements. For guaranteed minimum CTR, select specific CTR grades if available.
Verify CTR meets your output current requirements.
What is the maximum switching frequency of K1010?
The K1010 has a typical switching time of 2-4μs, allowing switching frequencies up to 50-100kHz depending on load conditions. For higher frequency applications, consider high-speed types like KPC series.
Suitable for general switching up to 50kHz.
Can K1010 be used with 3.3V logic?
Yes, K1010 can be used with 3.3V logic. Ensure proper current limiting resistor calculation: R = (3.3V - 1.2V) / If. For 10mA LED current, use approximately 200Ω resistor. Verify output current meets your load requirements based on CTR.
Use appropriate current limiting resistor for 3.3V operation.
What is the isolation resistance of K1010?
The K1010 provides typical isolation resistance of 10^12 ohms minimum. This high isolation resistance ensures excellent DC isolation between input and output circuits, critical for safety and noise immunity.
High isolation resistance ensures excellent DC isolation.
How do I protect K1010 from ESD?
While K1010 has internal ESD protection, for harsh environments: (1) Use proper grounding techniques; (2) Add external TVS diodes for additional protection; (3) Handle with ESD precautions during assembly; (4) Maintain proper PCB layout with adequate spacing.
Use standard ESD precautions during handling and assembly.