The HIS180SMD-0 operates on the same fundamental nanostructure emitter principle as all HISsmd series devices. A micro-fabricated heating element — constructed from a high-melting-point metal with a proprietary nanostructured high-emissivity coating — is resistively heated to approximately 500 °C at maximum drive power (330 mW). At this temperature it emits broadband infrared radiation closely approximating a near black-body spectrum across 2 to 20 µm.

The defining characteristic of the HIS180SMD-0 is its 1.8 × 1 mm rectangular radiating element — an area of 1.8 mm², representing a 5.6× increase over the 0.32 mm² of the HIS20SMD variants and an 80% increase over the 1 mm² of the HIS100SMD variants. The larger, rectangular element produces proportionally greater total radiant flux and a larger emission aperture, which is directly beneficial in optical systems requiring either maximum total power or effective illumination of an elongated aperture such as a spectrometer entrance slit or a rectangular gas cell window.

Notably, the HIS180SMD-0 operates at a higher electrical resistance (20 ± 2 Ω, both cold and hot) and a higher voltage (up to 2.6 V) than the HIS100SMD variants (9.5 Ω, 1.7 V), while drawing lower maximum current (125 mA vs 170 mA). This different electrical profile reflects the larger element geometry and means system designers must use the dedicated DCB.S3.330 driver board rather than the DCB.S3.175 or DCB.S3.290 used by the smaller variants.

Maximum modulation frequency is 8 Hz — lower than the 10 Hz of the HIS100SMD variants and the 14 Hz of the HIS20SMD variants. This reflects the larger thermal mass of the 1.8 mm² element. For most NDIR gas sensing, FTIR accessory, and broadband spectroscopy applications, 8 Hz modulation remains fully adequate for synchronous lock-in detection.

Largest Radiating Element in the HISsmd Series — 1.8 mm² Rectangular

At 1.8 × 1 mm, the HIS180SMD-0 has the largest radiating element in the entire HISsmd range — 80% larger than the HIS100SMD variants (1 mm²) and 5.6× larger than the HIS20SMD variants (0.32 mm²). The rectangular geometry is particularly well-suited to optical systems with elongated apertures such as spectrometer entrance slits, multipass Herriott cell input windows, and rectangular detector elements, providing more efficient etendue matching than a square or circular source.

Highest Optical Output in the HISsmd Series — Up to 40 mW

At 40 mW, the HIS180SMD-0 delivers 33% more optical power than the HIS100SMD-0 (30 mW), nearly double the HIS100SMD-S (26 mW), and approaching three times the output of the HIS20SMD-0 (15 mW). This maximum output level within a 3 × 3 mm SMD package enables optical system designs that would otherwise require larger, non-SMD infrared sources — maintaining manufacturing scalability while achieving laboratory-grade signal levels.

Full Broadband Mid-Infrared Coverage — 2 to 20 µm, No Window Loss

The open-cavity design ensures completely unattenuated emission across the full 2–20 µm mid-infrared spectrum. There is no window-related transmission loss, no window material absorption edge, and no restriction on wavelength access — giving optical system designers the maximum possible flexibility to use any external filter, window, or detector combination, including those targeting wavelengths beyond 14 µm inaccessible with Si-ARC windowed variants.

Distinct Electrical Architecture — 20 Ω, 2.6 V, 125 mA

The HIS180SMD-0 operates at a higher resistance (20 ± 2 Ω) and voltage (2.6 V) but lower current (125 mA) than the HIS100SMD variants. This higher-impedance characteristic provides advantages in some driver circuit designs where controlling current at lower values is preferred for stability and thermal management, while the higher voltage headroom is easily provided by the DCB.S3.330 driver (3.0–13 V input range).

Near Black-Body Emission with Emissivity > 0.9

The patented nanostructured emitter surface achieves emissivity exceeding 0.9, providing well-characterised, reproducible near black-body infrared output across the full 2–20 µm spectrum. This is essential for quantitative spectroscopy, detector calibration, and reference source applications requiring an accurately known source radiance.

Pulsable Operation — Modulation up to 8 Hz

Modulated output at up to 8 Hz enables synchronous lock-in detection for improved signal-to-noise performance. The 8 Hz limit reflects the larger thermal mass of the 1.8 mm² element. For applications requiring faster modulation, the HIS100SMD and HIS20SMD variants support 10 Hz and 14 Hz respectively.

JEDEC-Compliant Mechanical and Thermal Reliability

Full compliance with three JEDEC reliability standards confirms the HIS180SMD-0’s suitability for demanding long-term industrial and commercial deployment. This is particularly important at the higher power levels of the HIS180SMD-0, where thermal cycling stress on the element and package joints is more significant.

Production-Ready 3 × 3 mm Gold-Plated SMD Package

Despite its significantly higher output power, the HIS180SMD-0 shares the same 3 × 3 mm SMD footprint as all HISsmd variants, enabling use in PCB layouts designed for the series and compatibility with automated pick-and-place assembly and reflow soldering. The gold-plated package ensures reliable, oxidation-resistant contacts over the product lifetime.

Environmental Monitoring

Used in NDIR gas sensors for monitoring atmospheric gases such as CO₂ and methane.

Industrial Gas Detection

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

Smart Buildings & HVAC Systems

Supports indoor air quality monitoring in intelligent building automation systems.

Medical & Healthcare Diagnostics

Used in respiratory gas analysis and breath alcohol detection instruments.

Consumer Electronics & IoT

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

Scientific Research & Spectroscopy

Used in infrared spectroscopy systems, laboratory analyzers, and portable spectrometers.

United Spectrum Instruments is a specialised photonics and sensing technology company serving India’s research, industrial, and manufacturing sectors. As the sole authorised Indian distributor for the full INFRASOLID HISsmd product range — including the flagship HIS180SMD-0 — 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 coverage across the entire INFRASOLID range
• Technical consultation: Expert guidance on high-power IR source integration, DCB.S3.330 driver configuration, optical system design for 1.8 mm² rectangular element geometry, detector selection, and PCB thermal management for 330 mW operation
• Complete HISsmd series availability: All variants including HIS180SMD-0, HIS100SMD-0/A/S, HIS20SMD-0/A/S — plus DCB.S3.330, DCB.S3.290, DCB.S3.175, and BOB 0.4 accessories
• Application engineering: End-to-end support for FTIR instrument integration, long-path gas cell system design, detector calibration setups, industrial analyser development, and research instrumentation prototyping
• Fast domestic supply: Pan-India logistics with reduced procurement lead times and complete import documentation and GST compliance handling
• Institutional procurement support: Purchase order processing, GST-compliant invoicing, and documentation for IITs, CSIR, DRDO, ISRO, government departments, public sector undertakings, and corporate procurement teams

Nationwide coverage: Bengaluru, Hyderabad, Delhi NCR, Mumbai, Chennai, Pune, Ahmedabad, Kolkata, and all major technology and industrial centres across India