📌 Product Overview
The XLH11A5 is a phototransistor-type optocoupler manufactured by International Rectifier, designed to bridge the gap between low-voltage control logic and high-voltage power circuits. 🔒 It functions as a critical isolation barrier, utilizing an infrared LED and a silicon phototransistor detector to transmit signals while blocking electrical noise and high voltages.
💡 This component is specifically engineered for industrial automation and smart metering applications where signal integrity is paramount. Available in both through-hole (DIP6) and surface-mount (SMD6) packages, the XLH11A5 supports flexible PCB integration strategies for various environmental conditions.
🔧 Typical Applications
Based on its 5000Vrms isolation rating and CTR ≥20%, the XLH11A5 is optimized for the following scenarios:
- Industrial Control Systems: Provides reliable signal isolation for PLC modules and sensor interfaces, protecting logic circuits from high-voltage spikes induced by heavy machinery.
- Power Conversion: Suitable for switching power supplies and feedback loops, ensuring stable operation under varying load conditions.
- Renewable Energy: Designed into photovoltaic inverters and energy storage systems to maintain safe control levels.
- Household Appliances: Integrated into main control circuits for air conditioners, refrigerators, and water heaters to enhance safety and reliability.
📊 Key Technical Specifications
The table below outlines the essential electro-optical characteristics at (T_A = 25^\circ C) to validate performance windows:
| Parameter | Symbol | Test Conditions | Min / Typ | Max | Unit |
|---|---|---|---|---|---|
| Forward Voltage | (V_F) | (I_F = 10\text{mA}) | 1.2 | 1.5 | V |
| Current Transfer Ratio | CTR | (I_F=10\text{mA}, V_{CE}=10\text{V}) | 20 | - | % |
| Collector-Emitter Sat. | (V_{CE(sat)}) | (I_F=50\text{mA}, I_C=2\text{mA}) | - | 0.5 | V |
| Isolation Resistance | (R_{ISO}) | DC 500V, 40-60% RH | (5 \times 10^{10}) | (10^{11}) | (\Omega) |
| Response Time (Rise) | (t_r) | (V_{CE}=10\text{V}, R_L=100\Omega) | - | 10 | (\mu s) |
| Response Time (Fall) | (t_f) | (I_C=2\text{mA}) | - | 10 | (\mu s) |
⚠️ Absolute Maximum Ratings & Process Limits
Exceeding these ratings may cause permanent damage to the device. These limits define the safety boundaries for soldering and electrical operation.
| Parameter | Symbol | Value | Unit | Notes |
|---|---|---|---|---|
| Forward Current | (I_F) | 60 | mA | Continuous DC |
| Forward Peak Current | (I_{FP}) | 1 | A | Pulse width (\le 1\mu s) |
| Collector Current | (I_C) | 100 | mA | |
| Collector-Emitter Voltage | (V_{CEO}) | 30 | V | |
| Isolation Voltage | (V_{ISO}) | 5000 | (V_{rms}) | 1 minute test |
| Operating Temp. | (T_{OPR}) | -55 ~ +100 | (^\circ C) | |
| Soldering Temp. | (T_{SOL}) | 260 | (^\circ C) | For 10 seconds max |
📦 Package, Dimensions & Assembly Notes
The XLH11A5 is available in two standard package configurations to accommodate different assembly methods:
- DIP6 (Through-Hole): Supplied in tubes (65pcs/tube). Ideal for prototyping and wave soldering. Requires standard PTH spacing.
- SMD6 (Surface Mount): Supplied in Tape & Reel (1000pcs/reel). Optimized for high-speed automated pick-and-place machines.
⚡ Reflow Soldering Profile (SMD6):
- Preheat Temp ((T_s)): 150–200°C
- Liquidus Temp ((T_L)): 217°C
- Peak Temp ((T_p)): 260°C (Max)
- Time Above Liquidus: 60–150s
🔍 Sourcing & Supply Considerations
When integrating the XLH11A5 into a BOM, consider the following logistics and verification points:
- Package Selection: The part number changes from XLH11A5 (DIP6) to XLH11A5S (SMD6). Verify the suffix "S" when ordering for surface-mount production lines.
- Environmental Compliance: This product is compliant with CQC, UL, and VDE requirements, ensuring it meets international safety standards for industrial and consumer electronics.
- Moisture Sensitivity: While the molding compound is UL94V-0 rated, handling procedures should comply with standard MSL (Moisture Sensitivity Level) protocols if the packaging is unsealed for extended periods.
❓ FAQ
Q: What is the minimum Current Transfer Ratio (CTR) for the XLH11A5?
A: The datasheet specifies a minimum CTR of 20% under standard test conditions ((I_F = 10\text{mA}, V_{CE} = 10\text{V})). This ensures sufficient gain for most logic interface applications.
Q: Can the XLH11A5 be used in high-voltage isolation applications?
A: Yes. It features a high isolation voltage of 5000Vrms (input to output), making it suitable for protecting low-voltage microcontrollers from high-voltage power line transients.
Q: What is the difference between the XLH11A5 and XLH11A5S part numbers?
A: The difference lies strictly in the package. XLH11A5 refers to the DIP6 (Through-Hole) version, while XLH11A5S denotes the SMD6 (Surface Mount) version designed for reflow soldering.
Q: What are the operating temperature limits for this device?
A: The XLH11A5 is rated for an operating temperature range of -55°C to +100°C, allowing for reliable performance in harsh industrial environments and outdoor equipment.
Q: Is the XLH11A5 lead-free and compliant with environmental standards?
A: Yes. The datasheet indicates that it is an environmentally friendly product, compliant with CQC, UL, and VDE requirements. The terminals use matte tin-plated leads suitable for modern soldering processes.
