📌 Product Overview
The XL4N35 is a high-reliability photo-transistor optocoupler designed for electrical isolation and signal transmission. It features a high current transfer ratio (CTR) of ≥100% and robust isolation voltage of 5000Vrms. The device is engineered for stability and quick fault signal transmission in demanding environments, making it ideal for feedback control loops and interface isolation in industrial and consumer applications.
🔧 Typical Applications
- Switching power supply feedback control loops for output voltage stability
- Signal isolation in PLCs, motor drives, and sensor interfaces
- Serial communication interfaces (e.g., RS-232) for noise immunity
- Consumer electronics including smart home devices and peripherals
- Lighting control systems for dimming, smart switching, and wireless control
📊 Key Technical Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Current Transfer Ratio | CTR | ≥100 | % |
| Input Forward Voltage | VF | 1.2 Typ. | V |
| Collector Dark Current | ICEO | ≤50 | nA |
| Isolation Voltage | VISO | 5000 | Vrms |
| Operating Temperature | TOPR | -55 ~ 100 | °C |
⚠️ Absolute Maximum Ratings & Process Limits
Electrical and thermal parameters must not be exceeded under any condition. Key limits include a Forward Current (IF) of 60mA, Collector-Emitter Voltage (VCEO) of 30V, and a Total Power Dissipation (PTOT) of 350mW. The device's operating temperature range is -55°C to +100°C, with a storage temperature up to +125°C. Adherence to these ratings is critical for long-term reliability and preventing device failure.
📏 Package, Dimensions & Assembly Notes
The XL4N35 is available in two packages: DIP6 (through-hole) and SMD6 (surface-mount). The DIP6 is supplied in tubes of 65 pieces, while the SMD6 version is packaged on reels of 1000 pieces. For surface mount assembly, reflow soldering is recommended with a peak temperature not exceeding 260°C for a maximum of 30 seconds. Wave soldering is also supported with specific temperature and time profiles.
🚀 Sourcing & Supply Considerations
Supply is available in standard tube and reel quantities. Verify marking codes and supplier authenticity for consistency across production batches. Lead times and sample support should be confirmed directly with authorized distributors to ensure BOM stability and avoid counterfeit components.
❓ FAQ
Q: What is the difference between the XL4N35 and XL4N35S part numbers?
A: The XL4N35 refers to the DIP6 package, while the XL4N35S is the SMD6 surface-mount version.
Q: What is the Current Transfer Ratio (CTR) for the XL4N35?
A: The CTR is a minimum of 100% (Typical 1.5V) at IF=10mA and VCE=10V.
Q: What is the maximum isolation voltage?
A: The isolation voltage (VISO) is rated at 5000Vrms.
Q: Are there halogen-free options available?
A: Yes, the ordering code includes an option for halogen-free materials.
Q: What are the recommended soldering profiles for the SMD6 package?
A: Reflow soldering is recommended with a peak temperature of 260°C and a time above liquidus of 60-150s. Hand soldering should be limited to rework only.
