Specifications
| Type | Description |
|---|---|
| Part Number | EL_SIR204-A |
| Manufacturer | EVERLIGHT |
| Product Type | SMD LED |
| Category | LED |
| Device Function | Infrared emitting diode; condition: SIR204-A description; source page: 1 |
| Package Size | 3mm, T-1; condition: Product heading; source page: 1 |
| Lens Color | Blue; condition: Device selection guide; source page: 2 |
| Chip Material | GaAlAs; condition: Device selection guide; source page: 2 |
| Lead Spacing | 2.54 mm; condition: Feature list; source page: 1 |
| Peak Wavelength Feature | 875 nm; condition: Feature list, λp; source page: 1 |
| Continuous Forward Current | 100 mA; condition: Ta=25°C absolute maximum rating; source page: 2 |
| Peak Forward Current | 1.0 A; condition: Pulse width ≤100 µs, duty ≤1%, Ta=25°C absolute maximum rating; source page: 2 |
| Reverse Voltage | 5 V; condition: Ta=25°C absolute maximum rating; source page: 2 |
| Operating Temperature | -40 to +85 °C; condition: Absolute maximum rating; source page: 2 |
| Storage Temperature | -40 to +100 °C; condition: Absolute maximum rating; source page: 2 |
| Soldering Temperature | 260 °C; condition: Soldering time ≤5 seconds, absolute maximum rating; source page: 2 |
| Power Dissipation | 150 mW; condition: At or below 25°C free air temperature; source page: 2 |
| Radiant Intensity | min 4.0 mW/sr, typ 6.4 mW/sr; condition: IF=20 mA, Ta=25°C; source page: 3 |
| Radiant Intensity | typ 30 mW/sr; condition: IF=100 mA, pulse width ≤100 µs, duty ≤1%, Ta=25°C; source page: 3 |
| Peak Wavelength | typ 875 nm; condition: IF=20 mA, Ta=25°C; source page: 3 |
| Spectral Bandwidth | typ 45 nm; condition: IF=20 mA, Ta=25°C; source page: 3 |
| Forward Voltage | typ 1.30 V, max 1.65 V; condition: IF=20 mA, Ta=25°C; source page: 3 |
| Forward Voltage | typ 1.40 V, max 1.80 V; condition: IF=100 mA, pulse width ≤100 µs, duty ≤1%, Ta=25°C; source page: 3 |
| Reverse Current | max 10 µA; condition: VR=5 V, Ta=25°C; source page: 3 |
| View Angle | typ 30 deg; condition: 2θ1/2, IF=20 mA, Ta=25°C; source page: 3 |
| Application | Optoelectronic switch; condition: Listed application; source page: 1 |
| Application | Infrared applied system; condition: Listed application; source page: 1 |
| Application | Smoke detector; condition: Listed application; source page: 1 |
| Storage Recommendation | ≤30°C and ≤70% RH for 3 months after shipment; condition: Storage notes; source page: 7 |
| Extended Storage Recommendation | Up to 1 year in sealed container with nitrogen atmosphere and moisture absorbent material; condition: If stored for 3 months or more; source page: 7 |
| Hand Soldering Tip Temperature | 300°C max; condition: 30 W max, soldering time 3 sec max; source page: 7 |
| DIP Soldering Preheat Temperature | 100°C max; condition: 60 sec max; source page: 7 |
| DIP Soldering Bath Temperature and Time | 260°C max, 5 sec max; condition: Recommended DIP soldering condition; source page: 7 |
| Minimum Solder Joint Distance | 3 mm min; condition: From solder joint to epoxy bulb; source page: 7 |
| Packing Quantity | 1000 pcs per bag, 4 bags per inner carton, 10 inner cartons per outside carton; condition: Packing specification; source page: 6 |
| Datasheet Status | request_only |
Product Overview
The EL_SIR204-A is an EVERLIGHT infrared emitting diode in the LED category. It uses a GaAlAs chip and a 3mm T-1 blue transparent plastic package with 2.54 mm lead spacing. The package dimension tolerance is ±0.25 mm, and the device is specified with a typical 875 nm peak wavelength under IF=20 mA at Ta=25°C.
Electrical and optical data include radiant intensity of 4.0 mW/sr minimum and 6.4 mW/sr typical at IF=20 mA, plus 30 mW/sr typical at IF=100 mA using ≤100 µs pulses at ≤1% duty. Forward voltage is 1.30 V typical and 1.65 V maximum at 20 mA, or 1.40 V typical and 1.80 V maximum under the specified 100 mA pulse condition. The typical view angle is 30 degrees.
Assembly guidance includes 260°C soldering for up to 5 seconds, 300°C maximum hand soldering tip temperature for up to 3 seconds with a 30 W maximum iron, and a 3 mm minimum distance from solder joint to epoxy bulb. Applications listed for the device are optoelectronic switches, infrared applied systems, and smoke detectors.
Key Features
- Infrared emitting diode in 3mm T-1 package
- Blue transparent plastic package with 2.54 mm lead spacing
- GaAlAs chip material for infrared emission
- Peak wavelength specified at 875 nm
- 100 mA continuous forward current rating
- 1.0 A peak forward current under specified pulse conditions
- Typical radiant intensity of 6.4 mW/sr at 20 mA
- Typical 30 degree view angle at 20 mA
- Operating temperature range from -40 to +85 °C
- 260°C DIP soldering bath for 5 seconds maximum
Typical Applications
- Optoelectronic switch
- Infrared applied system
- Smoke detector
- 875 nm infrared emitter assemblies
- Pulsed infrared sensing circuits
Procurement Notes
When requesting a quote for EL_SIR204-A, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For LED and optoelectronic sourcing, brightness bin, wavelength or color temperature bin, forward voltage range, viewing angle, moisture sensitivity level and soldering process limits may affect final selection, availability and lead time.
FAQ
What type of device is EL_SIR204-A?
EL_SIR204-A is an EVERLIGHT infrared emitting diode in the LED category. The datasheet identifies it as a 3mm T-1 device using a GaAlAs chip and a blue transparent plastic package.
What wavelength does EL_SIR204-A emit?
The extracted datasheet facts specify a typical peak wavelength of 875 nm at IF=20 mA and Ta=25°C. The feature list also identifies λp as 875 nm.
What are the main current ratings?
The absolute maximum continuous forward current is 100 mA at Ta=25°C. Peak forward current is 1.0 A when pulse width is ≤100 µs and duty cycle is ≤1%.
What soldering limits apply to this diode?
The soldering temperature rating is 260°C for up to 5 seconds. Recommended handling also lists 300°C maximum hand soldering tip temperature for 3 seconds maximum and a 3 mm minimum solder joint distance from the epoxy bulb.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.