SLR343BCT3F ROHM Semiconductor LED (Other) In Stock
ROHM SLR343BCT3F is a single blue LED with a colorless transparent lens, delivering 600 mcd luminous intensity at 30 mA forward current in a radial through-hole package, ideal for status indicators, backlighting, and optical sensing applications.
- Manufacturer
- ROHM Semiconductor
- Package
- Other
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- SLR343BCT3F Datasheet PDF
- Category
- LED
- Temp Range
- -20.0°C to 80.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High luminous intensity of 600 mcd at 30 mA forward current for bright, visible blue indication
- Single blue color with colorless transparent lens maximizes optical output without color-filtering losses
- Radial through-hole mount allows simple PCB insertion and wave-soldering in high-volume production
- Maximum forward current of 30 mA with standard 3.2 V forward voltage typical for blue InGaN LEDs
- RoHS compliant and Pb-free (JESD-609 e1) construction meets global environmental and export regulations
Applications
The ROHM SLR343BCT3F blue LED is used as a power or status indicator on consumer electronics, industrial control panels, and embedded development boards where a high-brightness 600 mcd blue point source is needed at 30 mA. Its colorless transparent lens and radial package make it suitable for front-panel indicator arrays, fiber-optic launch sources, and phototherapy device calibration setups. The part is also used in educational robotics kits and Arduino-compatible projects for straightforward GPIO-driven visual feedback.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Color | BLUE |
| Color@Wavelength | Blue |
| Configuration | SINGLE |
| Forward Current-Max | 0.03A |
| JESD-609 Code | e1 |
| Lens Type | COLORLESS TRANSPARENT |
| Luminous Intensity-Nom | 600.0mcd |
| Mounting Feature | RADIAL MOUNT |
| Number of Functions | 1 |
| Optoelectronic Device Type | SINGLE COLOR LED |
| Overall Height | 5.4mm |
| Packing Method | BULK |
| Peak Wavelength | 468nm |
| Reverse Voltage-Max | 5V |
| Shape | ROUND |
| Size | 3.1mm |
| Surface Mount | NO |
| T-code | T-1 |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Pitch | 2.5mm |
| Viewing Angle | 40deg |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8541.40.20.00 |
| Country of Origin | Japan, Mainland China, Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistor value is needed to drive the ROHM SLR343BCT3F at 20 mA from a 5 V supply?
For the SLR343BCT3F with a typical forward voltage of 3.2 V and a target current of 20 mA from a 5 V supply, use a series resistor of (5 V − 3.2 V) / 0.020 A = 90 Ω. The nearest standard value is 91 Ω (1% E96 series), which sets the current to approximately 19.8 mA — well within the 30 mA maximum forward current rating.
How does the 600 mcd luminous intensity of the SLR343BCT3F compare to standard 3 mm blue LEDs for panel indicators?
At 600 mcd, the ROHM SLR343BCT3F is approximately 3–5× brighter than commodity 3 mm blue LEDs rated at 100–200 mcd, making it visible at distances of 5 m or more in moderately lit environments. This higher intensity suits industrial panels and outdoor-facing indicator windows where ambient light competes with the LED, while lower-brightness LEDs suit desktop-proximity human-machine interfaces.
Can the SLR343BCT3F be used with a current-limiting transistor circuit in a common-cathode LED array?
Yes. The SLR343BCT3F has a standard 2-lead radial anode–cathode pinout and can be driven by an NPN transistor (e.g., 2N3904) or a logic-level MOSFET in a common-cathode configuration. At VCE(sat) = 0.2 V and VF = 3.2 V from a 5 V rail, a base resistor of 1 kΩ and collector resistor of 82 Ω set the LED current to approximately 19 mA per channel.
What operating temperature range applies to the SLR343BCT3F, and how does temperature affect luminous intensity?
ROHM InGaN blue LEDs in the SLR series are typically rated from -40°C to +85°C for radial-mount versions. Luminous intensity decreases approximately 1–1.5% per degree Celsius rise above 25°C, so at 85°C the SLR343BCT3F output may drop to roughly 510–540 mcd. Designers should account for this derating when the LED is mounted near heat-generating components on a PCB operating above 50°C.
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