The HIS100SMD-0 operates as a pulsable thermal infrared emitter based on the same patented nanostructure technology used across INFRASOLID’s HISsmd series. A micro-fabricated resistive heating element — constructed from a high-melting-point metal with a nanostructured high-emissivity surface coating — is electrically heated to approximately 600 °C at maximum drive power of 290 mW. At this temperature, it emits broadband infrared radiation approximating a near black-body spectrum across the 2–20 µm range.

The defining characteristic of the HIS100SMD-0 is its 1 × 1 mm radiating element area — a 3× increase over the 0.32 mm² element of the HIS20SMD variants. This larger emitting area produces proportionally greater total radiant flux, resulting in up to 30 mW of optical output — more than double the output of the HIS20SMD-0 (15 mW) or HIS20SMD-S (13 mW). This significantly higher IR flux enables greater detector illumination, which is directly beneficial in applications requiring long optical path lengths, high detector signal margins, large-area detector coverage, or robust operation in attenuating environments.

The open-cavity design (no window) allows unattenuated emission across the full 2–20 µm mid-infrared spectrum. This is particularly valuable in broadband spectroscopy and multi-gas detection systems where the use of an external optical filter or custom window at the detector stage is preferred over a fixed emitter-side window, giving system designers full flexibility in wavelength selection.

Modulated operation is supported up to 10 Hz (50% modulation depth, square wave, 50% duty cycle), enabling lock-in detection techniques for improved signal-to-noise performance. The slightly lower maximum modulation frequency compared to the HIS20SMD variants (14 Hz) is a natural consequence of the larger thermal mass of the 1 mm² element, which requires more time to thermally cycle.

Largest Radiating Element in the HISsmd Series — 1 mm²

At 1 × 1 mm, the HIS100SMD-0 has a radiating element area three times larger than that of the HIS20SMD variants (0.32 mm²). This directly translates into higher total radiant flux, greater detector illumination, and improved signal margins in optical systems with large beam etendue, long absorption path lengths, or detector arrays requiring broad-area illumination. It is the recommended choice wherever maximum IR power output within a miniature SMD package is the primary design objective.

Highest Optical Output in the HISsmd Series — Up to 30 mW

With up to 30 mW of optical output, the HIS100SMD-0 delivers more than twice the optical power of the HIS20SMD-0 (15 mW) and nearly three times that of the HIS20SMD-A (11 mW). This elevated output power increases the signal-to-noise headroom available at the detector, enabling either longer optical path lengths in gas cells, operation with less sensitive (lower-cost) detectors, or more robust performance in attenuating or contaminated optical environments.

Full Broadband Mid-Infrared Coverage — 2 to 20 µm

The open-cavity design allows unattenuated emission across the complete 2–20 µm mid-infrared spectrum — the widest available coverage in the HISsmd range. This makes the HIS100SMD-0 the most versatile broadband IR source in the series, suitable for full-spectrum FTIR accessories, multi-gas detection platforms, material characterisation, and applications requiring wavelengths beyond 14 µm that are inaccessible with windowed variants.

Gold-Plated Package for Reliable, Long-Life Electrical Contact

The gold-plated SMD package prevents contact oxidation and ensures stable electrical resistance over the product lifetime. This is particularly important given the higher drive current (up to 170 mA) of the HIS100SMD-0 compared to the HIS20SMD series, where contact reliability is more critical.

Near Black-Body Emissivity > 0.9

The nanostructured radiating surface achieves emissivity exceeding 0.9, providing well-characterised, reproducible infrared output closely approximating an ideal thermal radiator. This is essential for quantitative spectroscopy applications where the source spectrum must be accurately known, and for detector calibration systems requiring a stable reference source.

Pulsable Operation — Modulation up to 10 Hz

Support for modulated output at up to 10 Hz enables synchronous lock-in detection, reducing thermal background noise and improving measurement sensitivity. The 10 Hz maximum frequency reflects the larger thermal mass of the 1 mm² element; for applications requiring faster modulation, the HIS20SMD variants support up to 14 Hz.

JEDEC-Compliant Mechanical and Thermal Reliability

Like all HISsmd series emitters, the HIS100SMD-0 is compliant with three JEDEC reliability standards covering temperature cycling, vibration, and mechanical drop testing — confirming its suitability for demanding industrial and commercial deployment environments.

Compatible with DCB.S3.290 Driver Circuit Board

The dedicated DCB.S3.290 Driver Circuit Board (LT3065 LDO regulator, 2.0–13 V input, 290 mW drive power) enables rapid prototyping and system evaluation without custom drive circuitry. The BOB 0.4 Breakout Board is also compatible, adapting the SMD footprint to 2.54 mm headers for bench development. Both accessories are available through United Spectrum Instruments.

Production-Ready SMD Package — 3 × 3 mm

Despite its higher output power, the HIS100SMD-0 uses the same 3 × 3 mm SMD footprint as the rest of the HISsmd series, enabling drop-in use in PCB layouts designed for SMD-format IR emitters. Full compatibility with automated pick-and-place assembly and standard reflow soldering processes supports high-volume manufacturing adoption.

Environmental Monitoring

Used in NDIR gas sensors to monitor atmospheric gases such as CO₂, methane, and hydrocarbons.

Industrial Safety and Gas Detection

Integrated into gas detection systems used in chemical plants, oil refineries, and manufacturing facilities.

Smart Buildings and HVAC Systems

Used in indoor air quality monitoring sensors for intelligent building automation systems.

Medical and Healthcare Diagnostics

Supports respiratory gas analysis and breath alcohol detection systems.

Consumer Electronics and IoT

Enables infrared sensing in smart home devices, portable analyzers, and wearable sensors.

Scientific Research and Spectroscopy

Used in infrared spectroscopy instruments and laboratory analytical systems.

United Spectrum Instruments is a specialised photonics and sensing technology company serving India’s research, industrial, and manufacturing sectors. As the authorised Indian distributor for the full INFRASOLID HISsmd product line, the team provides genuine components backed by manufacturer-certified expertise and dedicated local support across the country.

• Official authorisation: Verified product authenticity with full manufacturer traceability and warranty support for all INFRASOLID products
• Technical consultation: Expert guidance on high-power IR source integration, optical system design, detector selection, modulation optimisation, and PCB thermal management for the HIS100SMD-0’s higher power levels
• Full HISsmd series availability: Supply of HIS100SMD-0, HIS20SMD-0, HIS20SMD-A, HIS20SMD-S, and compatible accessories including DCB.S3.290, DCB.S3.175, and BOB 0.4 breakout boards
• Application engineering: End-to-end support for NDIR sensor development, FTIR instrument integration, industrial analyser design, environmental monitoring systems, and research instrumentation
• Fast domestic supply: Pan-India logistics with reduced lead times and complete import documentation handling
• Institutional procurement support: GST-compliant invoicing, purchase order processing, and documentation for government bodies, public sector undertakings, research institutions, defence establishments, and corporate procurement departments
• Nationwide service coverage: Bengaluru, Hyderabad, Delhi NCR, Mumbai, Chennai, Pune, Ahmedabad, Kolkata, and all major industrial and technology centres across India