In the ever-evolving landscape of automotive electronics, reliability, compactness, and high-voltage tolerance are non-negotiable. Enter the Toshiba TLX9161T, a solid-state photorelay engineered to meet the rigorous demands of modern electric vehicles and battery control systems.
The TLX9161T is a normally open (1-Form-A) photorelay that combines an infrared LED with a photo-MOSFET, encapsulated in a compact SO12L-T surface-mount package. Here’s what makes it stand out:
- High Breakdown Voltage: With a peak off-state voltage of 1500 V, it’s ideal for high-voltage battery systems.
- Low Trigger Current: Requires just 3 mA to activate, making it energy-efficient.
- Strong Isolation: Offers 5000 Vrms isolation voltage, ensuring safety and signal integrity.
- Compact Design: Measures just 7.76 × 10 × 2.45 mm, perfect for space-constrained automotive PCBs.
- AEC-Q101 Qualified: Certified for automotive-grade reliability.
Electrical Characteristics
| Parameter | Value | Unit |
| ON-state current | 30 | mA |
| OFF-state current | 100 | nA |
| ON-state resistance | 500 | Ω |
| Turn-on/off time | 1 | ms |
| Operating temperature | -40 to 125 | °C |
| Input voltage | 1.65 | VDC |
| Load voltage range | 0 to 1500 | VDC |
These specs make the TLX9161T a robust choice for battery management systems, fuel cell control, and EV power distribution units3.
The TLX9161T is tailored for:
- Battery control in EVs and hybrid vehicles
- High-voltage switching in automotive systems
- Isolation and signal control in harsh environments
Its wide creepage and clearance distances (≥8 mm) and insulation thickness (≥0.4 mm) ensure compliance with stringent safety standards. As vehicles become more electrified and autonomous, components like the TLX9161T play a critical role in ensuring safe, efficient, and compact system design. Its solid-state nature eliminates mechanical wear, offering longer life and faster switching compared to traditional relays.
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