May 11, 2025
506
In today's industrial and automotive electronics, demand for high-temperature optocouplers with robust isolation capabilities is surging. The TCET1113G from Vishay Semiconductor stands out as a premier solution, offering a 110°C operating range, 5000Vrms isolation, and industry-leading current transfer ratio (CTR) stability. Designed for safety-critical applications like switch-mode power supplies and microprocessor interfaces, this 1-channel NPN phototransistor optocoupler combines reliability with DIN/IEC-compliant reinforced isolation. Read on to discover how the TCET1113G addresses modern design challenges while outperforming comparable models.
The TCET1113G is a through-hole mounted optocoupler featuring a phototransistor output, certified for applications requiring reinforced isolation up to 600V RMS. Its ultra-low coupling capacitance (0.2pF typical) and high common-mode rejection make it ideal for noisy environments.
| Parameter | Value | Standard |
|---|---|---|
| Isolation Voltage | 5000 Vrms | IEC 60747-5-5 |
| Current Transfer Ratio (CTR) | 100% - 200% | Vishay Datasheet |
| Forward Current (If) | 60 mA max | IEC 60747-5-2 |
| Operating Temperature | -40°C to +110°C | IEC 60068-1 |
| Rise/Fall Time | 3 μs / 4.7 μs | Vishay Test Conditions |
CTR Grouping: Available in 9 precision-matched groups for consistent performance
Safety Compliance: UL 94 V-0 isolation materials, CTI ≥ 175 (IEC 60112)
Robust Construction: 4mm insulation thickness, >8mm external creepage distance
Temperature Resilience: Low CTR drift across -40°C to +110°C range
High Immunity: VIOTM = 6kV peak transient overvoltage rating
When selecting the TCET1113G for your design:
Verify Isolation Needs: Choose for applications ≤600V RMS (reinforced isolation)
CTR Matching: Select appropriate CTR group (100-200%) based on LED drive capability
Thermal Considerations: Ensure ambient temperature ≤110°C with proper derating
Package Compatibility: 4-DIP (10.16mm) through-hole mounting
| Model | CTR Range | Temp Range | Isolation Voltage | Best For |
|---|---|---|---|---|
| TCET1113G | 100-200% | -40°C to +110°C | 5000Vrms | High-temp industrial |
| PC817x | 50-600% | -30°C to +100°C | 5000Vrms | General purpose |
| TLP185(GR) | 50-400% | -55°C to +110°C | 3750Vrms | Automotive |
Why choose TCET1113G? Superior temperature coefficient of CTR and 6kV impulse voltage rating make it ideal for harsh environments.
Switch-Mode Power Supplies: Provides feedback loop isolation in AC/DC converters
Industrial Interfaces: PLC I/O modules requiring 600V reinforced isolation
Medical Equipment: Patient-protected circuits meeting IEC 60601-1
EV Chargers: High-voltage detection with temperature resilience
According to MarketsandMarkets, the optocoupler market is projected to grow at 6.2% CAGR through 2027, driven by:
Increasing adoption of industrial IoT devices
Stringent safety regulations in power electronics
Demand for high-temperature components in automotive
The TCET1113G addresses these trends with its 110°C rating and IEC 60747-5-5 compliance.
Emerging developments influencing optocoupler design:
Higher Integration: Combining optocouplers with gate drivers in single packages
Wider Temp Ranges: Components exceeding 125°C for under-hood automotive apps
Improved CTR Stability: New semiconductor materials reducing temperature drift
A: At 110°C continuous operation, Vishay's testing shows >100,000 hours MTBF when operated within datasheet limits.
A: Pre-binned CTR groups (e.g., 100-200%) ensure consistent performance across production batches, reducing calibration needs.
A: While it provides isolation, the phototransistor output is limited to 50mA/70V - suitable for signal isolation but not power switching.
A: Maintain ≥8mm creepage distance between input/output, use guard rings for high-noise environments, and avoid routing high-speed traces near the device.
A: Yes, when used within its ratings, it meets reinforced isolation requirements for BF-type applied parts per IEC 60601-1.
The TCET1113G sets a benchmark for high-temperature optocouplers, delivering unmatched isolation performance and CTR stability for industrial, automotive, and medical applications. With Vishay's rigorous quality standards and global supply chain support, this component provides a future-proof solution for safety-critical designs.
Contact our technical sales team: [email protected] for volume pricing, samples, or application support.
