Infrared LED JSIR 350-4

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Short description
Premium infrared emitter for NDIR gas analysis with high modulation frequency. The JSIR 350-4 in HermeSEAL configuration uses a nanoamorphous carbon membrane to reach active-area temperatures up to 850 °C, providing a stable radiation output suited to demanding applications in medical, industrial and aerospace gas sensing.

Packaging
The device is supplied in a standard TO39 housing with an added reflector and a SiARC anti-reflective window. This packaging optimizes emission across the 2 to 15.5 µm wavelength range. The HermeSEAL® option uses a patented soldered-window process (no adhesive) to ensure a hermetic seal, protecting the sensitive membrane and improving lifetime and reliability in high-temperature, humid or aggressive environments.

Key facts

• Time constant: 12.5 ms
• High radiation power with long-term stability
• High durability in harsh environments
• Resistant to environmental influences due to soldered window
• Ideal pairing with Micro-Hybrid IR detectors (MTS thermopile detectors or MPS pyro detectors)

Technical specifications

• Emission range min: 2 µm
• Emission range max: 15 µm
• Active area: 2.2 x 2.2 mm²
• Hot resistance: 40 ± 20 Ω
• Temperature coefficient: 500 ppm/K
• Time constant: 12.5 ms
• Nominal power consumption: 650 mW
• Operating voltage: 4.9 V
• Operating current: 132 mA
• Recommended operating mode: Constant power mode
• Estimated operating life: > 5,000 h at 740 °C; > 100,000 h at 610 °C
• Temperature of active area: 610 ± 30 °C
• Maximum power consumption: 1,200 mW
• Maximum enclosure temperature: 125 °C
• Maximum temperature of active area: 850 °C
• Emitter window: silicon with anti-reflective coating (SiARC)
• Socket: TO39