CSL0901 series and CSL0902 series,
Light source position increased from 0.18mm to 0.49mm
Compliant with automotive LED standards such as AEC-Q102

Today, automotive speedometer indicator light sources are equipped with a shield to prevent LED light from leaking into adjacent areas. However, temperature fluctuations create a gap that doesn't touch the circuit board, and preventing light from leaking into this area presents a new challenge.

In addition, as LEDs are adopted in various applications, industries with demanding electronic component usage environments are demanding highly reliable products that provide measures against aged deterioration due to environmental stress.
To address this, ROHM has developed a series of compact, high-output surface-mount lens-type LEDs. The new product lineup consists of the "CSL0901 Series," which offers standard brightness, and the "CSL0902 Series," which offers even higher brightness for high-end applications, for a total of 18 models.

The new product line also includes automotive-grade products that have secured reliability as indicator light sources for automotive speedometers expected to be used in harsh environments.

The industry has adopted reflector-type LEDs as the existing speedometer light source. However, as space saving in applications becomes more important, adoption of smaller, compact LEDs is being considered.
Conventional compact molded LEDs have a low light source position of 0.18mm, which can lead to light leakage into adjacent areas. However, ROHM has addressed this issue by increasing the light source position to 0.49mm. This increased use of compact LEDs has enabled a miniaturization of approximately 1/18th the size of conventional reflector-type LEDs.
Additionally, all products feature a structure that prevents light degradation even in high-temperature environments such as automobile interiors. The blue lights utilize a newly developed molded resin. For example, in a high-temperature current test (85℃, IF=20mA, 1000 hours of current conduction) of the blue type, the luminous intensity retention rate was successfully improved by approximately 80% compared to existing products.
In addition, by improving precision in process stages such as die bonding and mold precision, a central brightness approximately 5 to 7 times higher than that of existing products was achieved.

ROHM's LEDs comply with the AEC-Q101 standard, a reliability standard for electronic components used in automotive applications. They also comply with the AEC-Q102 standard for optical devices, established in March 2017. This new standard includes sulfuration testing, aiming to achieve a higher level of reliability in applications such as automotive and industrial equipment, which face harsh operating environments.

The new product line began sequential mass production in August with a monthly production capacity of 1 million units.