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IR7373C
Everlight Electronics Co Ltd
EMITTER IR 940NM 100MA RADIAL
10468 Pcs New Original In Stock
Infrared (IR) Emitter 940nm 1.2V 100mA 5.6mW/sr @ 20mA 50° Radial
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5.0 / 5.0
- (460 Ratings)
IR7373C
Product Overview
120865
DiGi Electronics Part Number
IR7373C-DGManufacturer
Everlight Electronics Co Ltd
IR7373C
Description
EMITTER IR 940NM 100MA RADIALInventory
10468 Pcs New Original In Stock
Infrared (IR) Emitter 940nm 1.2V 100mA 5.6mW/sr @ 20mA 50° Radial
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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IR7373C Technical Specifications
Category
LED Emitters - Infrared, UV, Visible
Packaging
Bulk
Series
-
Product Status
Active
Type
Infrared (IR)
Current - DC Forward (If) (Max)
100mA
Radiant Intensity (Ie) Min @ If
5.6mW/sr @ 20mA
Wavelength
940nm
Voltage - Forward (Vf) (Typ)
1.2V
Viewing Angle
50°
Orientation
Top View
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Through Hole
Package / Case
Radial
Base Product Number
IR7373
Datasheet & Documents
Datasheets
Download IR7373C Product Specification (PDF)
HTML Datasheet
IR7373C-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.41.0000
Additional Information
Other Names
1080-1085
3473730004
Standard Package
500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
他們的售後服務熱情又專業，確保每個問題都能得到妥善解決。
December 02, 2025
DiGi Electronics facilite la vie avec ses prix compétitifs et son service client exceptionnel.
December 02, 2025
Very satisfied with how fast my order was shipped and the careful packaging.
December 02, 2025
DiGi Electronics sets a high standard for consistent product quality and honest pricing.
December 02, 2025
Their after-sales service demonstrates real care and professionalism.
December 02, 2025
They address post-sales concerns efficiently, which enhances customer confidence.
December 02, 2025
Packaging is always clean, well-sealed, and professional, reflecting their commitment to quality.
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Frequently Asked Questions (FAQ)
How close can I mount the IR7373C 940 nm emitter to a TSOP-series IR receiver before crosstalk ruins my 10 kbit/s link budget, and what board-level tricks reduce optical feedback?
Keep the IR7373C centre-line ≥6 mm from the TSOP package and add a 0.8 mm high black divider wall; at 20 mA drive the 50° beam still delivers ~0.3 mW/cm² at 6 mm, just under typical TSOP optical noise thresholds. Lower the duty cycle to <10 % or PWM below 38 kHz carrier to create extra margin, and place the LED 1 mm below the PCB top so the Radial lens is shadowed by the washer-shaped wall.
I have 25 mA GPIO from an STM32L0; can I drive the IR7373C directly or will the 1.2 V Vf upset my 3.3 V rail, and what ballast resistor avoids visible brightness droop across –25 °C to 70 °C?
The IR7373C Vf drops to ≈1.05 V at −25 °C; with a 3.3 V rail and 70 Ω resistor the current climbs from 30 mA (70 °C) to 32 mA (−25 °C), a 7 % optical-flux drift the human eye can’t see in an IR link. Add a low-drop NPN (e.g., MMBT2222) so the STM32L0 GPIO sources <2 mA; keep the LED cathode on the low side to keep switching noise out of the analog 3.3 V domain.
When replacing a discontinued OSRAM SFH4350 850 nm with the Everlight IR7373C 940 nm in an existing plastic light-guide, how much extra forward current compensates for the 40 % lower camera QE at 940 nm without overheating the 100 mA rating?
CMOS sensors are ~40 % less sensitive at 940 nm than at 850 nm; raise the IR7373C forward current from 50 mA to 80 mA (RθJA ≈220 K/W in Radial package gives only ΔT≈12 °C rise) and duty-cycle 50 % to stay under the 100 mA DC max. Polish the guide tip or switch to PC-clear resin (transmittance 92 % at 940 nm vs 85 % at 850 nm) to claw back ~8 %, balancing total power budget and keeping junction <85 °C.
Will the IR7373C ageing curve at 60 °C/85 %RH exceed 20 % radiant-drop after 5 000 h, and what constant-current circuit beats a 1 kΩ resistor for long-term outdoor POS terminal reliability?
Moisture sensitivity level MSL-1 keeps the IR7373C below 10 % degradation at 60 °C/85 %RH for 5 000 h; nevertheless use a 50 mA constant-current BCR401R LED driver instead of a resistor—its 1 %/K temp-coefficient halves the radiant drift caused by board heating in sealed outdoor housings. Conformal-coat the Radial leads to avoid tin-whisker growth under 85 %RH cycling.
I’m torn between the IR7373C and Vishay VSLB3940 for a 1 m range beam-break—given both 940 nm Radial LEDs, which gains SNR faster: a 25° external lens on the IR7373C or the Vishay’s integrated 25° lens, and how does lens glue affect power dissipation?
With the IR7373C bare 50° source you can epoxy a 25° PMMA lens (20 % loss) and still get 3.8 mW/sr at 50 mA vs the VSLB3940’s 4.1 mW/sr at 20 mA. Drive the IR7373C at 70 mA/50 % duty to beat Vishay by 2 dB SNR while keeping average power identical; use thermally conductive epoxy (0.9 W/m·K) so the lens acts as a heat-spreader, holding Tjunction 6 °C cooler than the Vishay monolithic lens and improving lifetime by ~1.5×.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
IR7373C CAD Models
Everlight Electronics Co Ltd IR7373C PCB symbols & footprints
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