I. Product Selection & Packaging

Q1: How to select infrared emitting and receiving devices? What package specifications does XINGLIGHT offer?

A:XINGLIGHT infrared emitting and receiving series covers mainstream package sizes including 1206, 3227, 4335, and 4543. When selecting, the following factors should be considered:

Package size: Choose based on PCB space and SMT equipment capability. Miniature SMD types suit compact layouts, while larger sizes (4335/4543) can extend infrared sensing distance.

Wavelength matching: The emitter and receiver must operate at the same wavelength; 940nm is the most common. XINGLIGHT’s entire series uses the standard 940nm wavelength.

Mounting method: Both miniature SMD and through‑hole options are available.

Pairing needs: Emitters (IR/HIR) and receivers (PT/PDC) are offered as a one‑stop matched set.

Q2: What package specifications are available for XINGLIGHT infrared devices? Can they be directly used on SMT pick‑and‑place machines?

A:XINGLIGHT covers mainstream package sizes including 1206, 3227, 4335, and 4543, precisely matching the optimal throughput of mainstream SMT automatic placement equipment. The products are supplied in tape‑and‑reel packaging, reducing reel‑change frequency and significantly improving line OEE (Overall Equipment Effectiveness). The entire series supports both standard reflow soldering and manual soldering processes, with soldering parameters compatible with existing production lines, requiring no additional equipment adjustments.

Special design optimizations have been made for dome‑package types (e.g., XL‑PT26‑21B/C, XL‑IR26‑21C) to ensure stability during high‑speed placement of non‑standard components.

Q3: How do I pair an infrared emitter and receiver? Does XINGLIGHT provide pairing services?

A:Pairing an infrared emitter and receiver must follow these principles:

Wavelength matching: The emitter and receiver must operate at the same wavelength, typically 850nm or 940nm. XINGLIGHT’s entire series uses the standard 940nm wavelength.

Spectral matching: The receiver responds only to infrared light and is spectrally matched to the 940nm emitter, ensuring best performance when used together.

Package matching: Using the same package size facilitates PCB layout and SMT placement.

XINGLIGHT offers a one‑stop matching service for infrared emitter‑receiver pairs, providing both emitters (IR/HIR) and receivers (PT/PDC) to simplify BOM management and help customers accelerate mass production.

Q4: What are the features of the 1206‑package infrared sensor? What applications is it suitable for?

A:The 1206 package is one of the most mainstream miniature SMD packages in the infrared sensing field, with dimensions of approximately 3.2×1.6×1.1mm. XINGLIGHT’s 1206‑package infrared devices feature:

Miniaturised design: Suitable for compact PCB layouts and small‑form‑factor devices.

Strong SMT compatibility: Standard SMD package supports automatic SMT placement and infrared reflow soldering.

High reliability: Moisture sensitivity level (MSL) 4‑5.

Standard wavelength: 940nm, compatible with mainstream infrared communication protocols.

Applications include smart home remote controls, consumer electronics, and wearable devices.

Q5: What are the advantages of dome‑package infrared devices (e.g., XL‑PT26‑21B/C)?

A:XINGLIGHT’s dome‑package infrared devices (e.g., XL‑PT26‑21B/C, XL‑IR26‑21C) have been specially optimised:

Stable high‑speed placement: Design optimisations ensure stability during high‑speed mounting of non‑standard components.

Good directivity: The dome structure provides better light directivity, suitable for sensing and recognition applications.

Strong SMT compatibility: Standard SMD package supports automatic SMT placement.

II. Technical Parameters & Reliability

Q6: What is the operating temperature range of the infrared sensors? What harsh environments can they withstand?

A:XINGLIGHT infrared emitting and receiving devices have been tested over a wide temperature range of ‑40°C to +85°C. They maintain stable transmit/receive performance under the following complex conditions:

Humid environments: Industrial‑grade moisture resistance.

High‑temperature environments: Wide‑temperature tolerance, suitable for industrial and automotive high‑temperature scenarios.

Strong light interference: Excellent immunity to strong ambient light.

Temperature fluctuations: No failure after 100 thermal shock cycles (‑40°C to +100°C).

Workshop dust: Maintain detection accuracy in harsh industrial environments.

Q7: What is the service life and reliability of the infrared sensors?

A:XINGLIGHT infrared emitting and receiving devices have undergone rigorous reliability verification:

1000‑hour life test: Low signal degradation over long‑term use.

100 thermal shock cycles (‑40°C to +100°C): No failure.

Industrial‑grade reliability: Stable operation under complex conditions such as humidity, high temperature, and strong light interference.

High‑end models (e.g., XL‑Z504IRC/PDC) employ enhanced chip designs that improve both emission efficiency and receiving sensitivity, effectively extending the service life of end products.

Q8: What is the difference between 940nm and 850nm infrared sensors? How do I choose?

A:940nm and 850nm are two mainstream wavelengths for infrared emitters. The main differences are:

XINGLIGHT’s entire series uses the standard 940nm wavelength, which is compatible with mainstream infrared communication protocols and offers strong immunity to ambient light interference.

Q9: Are the infrared sensors RoHS‑compliant? Can they be used in export products?

A:All XINGLIGHT infrared emitting and receiving devices strictly comply with RoHS environmental standards, eliminating compliance risks at the source and meeting the needs of export‑oriented production. Medical‑grade models also meet the export compliance requirements for medical devices.

Q10: What is a slot‑type photoelectric infrared pair? What applications is it suitable for?

A:he slot‑type photoelectric infrared pair is a dedicated matched set of infrared emitter and receiver offered by XINGLIGHT. It consists of an infrared emitter and a receiver arranged in a U‑shaped slot structure. When an object passes through the slot, it blocks the light and triggers a detection signal.

Main applications include:

High‑speed light curtains: Building safety light‑curtain detection modules.

LiDAR synchronous detection: Meeting high‑speed, high‑precision detection requirements on production lines.

Conveyor material counting: Automated counting of materials passing through production lines.

Object presence detection: Obstacle avoidance sensing for equipment.

III. Application Scenarios

Q11: What smart home applications can the infrared sensors be used in?

A:XINGLIGHT entire 940nm standard‑wavelength infrared transceiver series is compatible with mainstream infrared communication protocols. Low‑power chip designs align with energy‑saving trends in home appliances. Widely used in:

Home appliance remote control: Air conditioners, rice cookers, humidifiers, etc.

Smart locks: Human proximity sensing.

Whole‑house lighting control: Infrared trigger sensing.

Both miniature SMD and through‑hole options are available, compatible with compact PCB layouts in various small appliances. The wide‑temperature stability ensures that sensing and remote‑control functions do not fail in any season, significantly reducing after‑sales repair rates for household devices.

Q12: What commercial and consumer electronics applications are the infrared sensors suitable for?

A:XINGLIGHT infrared emitting and receiving devices cover a wide range of commercial electronic equipment needs:

Consumer electronics: TWS earphone in‑ear detection, smart watch proximity detection, portable wearable infrared proximity detection, gesture wake‑up and recognition.

Commercial equipment: Self‑service coin machines, cash register scanners, printers, game consoles, robotic vacuum cleaners, smoke detectors.

Security and surveillance: Night‑vision fill‑light for security cameras, human presence sensing in malls, access control infrared beam sensing.

Among these, the 4335 and 4543 larger‑size emitter models can extend infrared sensing distance, improving the security coverage in malls and retail stores. Standardised packaging suits high‑volume SMT production for commercial devices, with stable and controllable supply.

Q13: What industrial automation applications do the infrared sensors have?

A:Leveraging a wide temperature tolerance of ‑40°C to +85°C and strong resistance to bright light and moisture interference, XINGLIGHT infrared emitting and receiving devices are suitable for the following industrial scenarios:

Conveyor material counting: Automatic counting of passing materials.

Object presence detection: Detecting whether an object is present on the production line.

Equipment obstacle avoidance: Anti‑collision sensing for industrial equipment.

High‑speed light curtains: Paired with dedicated slot‑type photoelectric emitter‑receiver pairs to build high‑speed light‑curtain detection modules.

LiDAR synchronous detection: Meeting high‑speed, high‑precision detection requirements on production lines.

Having passed thermal shock and long‑term life tests, they maintain detection accuracy in harsh environments with dust and large temperature fluctuations.

Q14: Can the infrared sensors be used in medical equipment?

A:Yes. XINGLIGHT dedicated slot‑type infrared emitter‑receiver pairs are optimised for medical detection scenarios, suitable for:

Pulse oximeters: Photoelectric sampling modules.

Medical endoscopes: Precision optical inspection.

Portable diagnostic instruments: Small medical devices.

The devices offer uniform light‑receiving sensitivity and stable signal output, with no sampling errors caused by stray light. Industrial‑grade moisture and temperature resistance are suitable for hospital constant‑temperature and high‑humidity disinfection environments. They comply with RoHS standards and meet export compliance requirements for medical devices. Miniature through‑hole packaging fits the compact structural designs of small portable medical devices, with low signal degradation over long‑term use, ensuring accurate and reliable measurement data.

IV. Procurement, Delivery & Cost

Q15: Are XINGLIGHT infrared sensors in stock? What is the delivery lead time?

A:XINGLIGHT standard mass‑production models in the infrared emitting and receiving series are supplied with stable availability and ample stock, with delivery within 3 days. This effectively avoids production stoppages caused by shortages of less common models.

Q16: Can bulk purchasing of XINGLIGHT infrared sensors reduce BOM costs?

A:Yes. Bulk purchasing from XINGLIGHT offers significant cost advantages:

Standardised mass production: Lower BOM costs compared to customised components.

Same‑package multi‑specification alternatives: B/C version interchangeability, TR/TR8 tape‑and‑reel options.

Batch BOM matching: Supports batch BOM matching to help enterprises build a secure supply chain.

Reduced process adaptation costs: Soldering parameters are compatible with existing production lines, requiring no additional equipment adjustments.

Q17: Does XINGLIGHT provide same‑package alternative solutions? What if there is a shortage?

A:XINGLIGHT offers same‑package multi‑specification alternatives:

B/C version interchangeability: Different versions within the same package can replace each other.

TR/TR8 tape‑and‑reel options: Different reel specifications are available.

Batch BOM matching: Supports batch matching to help enterprises build a secure supply chain.

Combined with the 3‑day rapid delivery and ample stock, these measures effectively mitigate risks from market fluctuations and sudden shortages.

V. Technical Support & Services

Q18: What technical support does XINGLIGHT provide for infrared sensing products?

A:XINGLIGHT offers the following technical support and services:

Selection consulting: The professional technical team provides one‑stop matching services for emitters and receivers.

Process guidance: Efficient solutions for practical issues in soldering, cleaning, potting, and other processes.

Complete documentation: Full technical documents and third‑party test reports are provided, with transparent and traceable parameters.

Storage assurance: Supports anti‑static packaging and customised storage solutions; unused components can be extended in shelf life through standard desiccation treatment.

Q19: What certifications does XINGLIGHT hold?

A:XINGLIGHT Electronics was founded in 2012 and is a high‑tech enterprise integrating R&D, production, sales, and service, with its own brand “XINGLIGHT”. The company has obtained the following certifications:

ISO9001: Quality Management System.

ISO14001: Environmental Management System.

IATF16949: Automotive Industry Quality Management System.

AEC‑Q102: Automotive Optoelectronic Semiconductor Reliability Test.

RoHS: Environmental Standard Compliance.

The company has also implemented a WMS intelligent warehouse ERP system and adopts strict process controls to ensure product quality and reliability.

Q20: How can I obtain samples and bulk quotations for XINGLIGHT infrared sensors?

A:You can reach us through the following channels:

Submit sample test applications or bulk purchase inquiries online.

Our professional technical team will contact you promptly and provide one‑on‑one selection advice and quotation services.