2835 LED specifications

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

More recently, LEDs were mainly used as on / off indicators for various electronic equipment. However, modern technologies for the production of radio and electrical components are advancing by leaps and bounds. Now such devices are used in various industries. The choice is very wide both in terms of the number of manufacturers and the variety of modifications. Due to its high technical characteristics, 2835 LEDs are the most widely used by numerous manufacturers of energy-saving lamps for various purposes.

Marking, description and design features

The four-digit index in the marking indicates the overall dimensions of the LED chip. For a 2835 form factor device, they are: length - 2.8 mm, width - 3.5 mm, thickness - 0.8 mm.

Design and technological features:

• The housing is made of special heat-resistant plastic and attached to an aluminum heat sink (0.25 mm thick).
• Increased radiation area (compared to analogues of other series, for example, 3528) - 6.9 mm², which is more than 70% of the totaloverall area of the chip.
• Increased solder contacts for extra heat dissipation.

SMD-LEDs 2835 belong to the group of high-performance high-brightness devices of medium power and are designed for surface mounting in terms of their characteristics, according to both Russian and international classification.

Operating voltage and rated current

Among the electrical characteristics, there are two main ones that affect the choice of power source:

• Working voltage (voltage drop across the LED itself) - usually indicated in the device index and is the average value between the minimum and maximum allowable value.
• The rated current flowing through the product, which is necessary for proper operation and ensuring the other parameters declared by the manufacturer.

According to current-voltage characteristics, SMD 2835 LEDs are now produced:

• with operating voltage: 3, 6 and 9V;
• with rated current from 60 to 150mA.

The choice of a particular product depends on its application.

Note! For long-term and trouble-free operation of the LED, the appropriate driver must be used.

Light output, efficiency and power

These are three more very important and interrelated technical characteristics of the 2835 LED. Luminous efficiency characterizes the amount of light flux emitted by one device. For products 2835, independing on the specific modification, its value is in a wide range from 24-29 lm (for varieties with an operating voltage of 3 V and a rated current of 60 mA) to 130-140 lm (for models designed to operate from 6-9 V and a rated current 100-150 mA).

The efficiency of the device is the ratio of the strength of the luminous flux to the power it consumes. Series 2835 refers to high performance devices. The value of this indicator is in the range from 120 to 170 lm / W. It is by this indicator that one can compare lighting lamps made using various technologies (incandescent, fluorescent, halogen and LED) with each other.

Power consumption of 2835 LEDs currently produced is: 0, 2, 0.5 or 1.0W.

Glow temperature and dispersion angle

Although all 2835 brand LEDs emit white light, the color perception of different modifications is different. This parameter is called the glow temperature (or color temperature) and is expressed in degrees Kelvin. According to this indicator, all devices are conventionally divided into three main groups:

• 2700-3500K - warm white (most reminiscent of light from an ordinary incandescent lamp);
• 3500-5000K - neutral white (or daylight);
• 5000-6500 K - cold white (used mainly for the manufacture of car headlights and hand-held flashlights, as well as for street lighting).

2835 form factor products are available in all three color temperature groups.

One moreAn important characteristic of the 2835 LED is the beam angle. This value characterizes the angle of light propagation, within which the intensity of the light flux will be at least ½ of that on the axis of the crystal. For LEDs of this series, this figure is 120⁰.

Advantages and applications

2835 LEDs have a number of undeniable advantages:

• good energy-saving performance with fairly low power;
• small size;
• wide selection of different modifications;
• large dispersion angle;
• wide operating temperature range (from -40⁰С to +105⁰С);
• low pulsation of glow;
• high resistance to mechanical stress and vibration;
• long service life.

All these advantages and high technical performance predetermined the widespread use of LEDs of this series in a variety of lighting devices: lamps, light panels of various sizes, LED tubes, and so on.

5730 vs 2835 LED performance comparison

Historically, 5730 size LEDs appeared on the market much earlier than 2835. Therefore, initially they were quite widely used in the production of energy-saving lamps. Now 2835 LEDs are replacing the 5730 format. For comparison, let's take devices from a fairly well-known in our country and well-established Chinese manufacturer Honglitronic. Comparingdevices of various form factors of the same power and luminous range, we come to the conclusion that the technical characteristics (both operational and maximum permissible) are almost identical.

The difference lies only in the design features: the 5730 body significantly exceeds the 2835 in both area and thickness.

And this, in turn, provides the first with higher rates of strength and resistance to vibrations. In addition, the “big brother” has a protective lens glued on top of the light-emitting element, which significantly increases moisture resistance. Therefore, it is 5730 that is often used in the manufacture of car running lights, direction indicators or brake lights.

What to look for before buying

LEDs of the 2835 series are widely used not only by manufacturers of industrial lighting devices, but also by numerous amateurs who make exclusive lamps with their own hands (or, for example, repair failed LED household lamps). Of course, if you purchase such devices in highly specialized stores, then the sales assistant will tell you all the necessary information. However, ordering these items online makes the process much easier and also provides the greatest choice in terms of price, manufacturers and variety of models.

Before buying, you must carefully study all the characteristics of the 2835 LED and familiarize yourself with the principle of marking. Each manufacturer has its own. Take for example the LED of the well-known and popular in Russia American company Cree JE2835WTA0G727E:

• J - Surface Mount Series;
• E - power 0.5W (K - 1.0W);
• 2835 – geometric dimensions of the chip;
• WT - color white;
• A0 - operating voltage 3V (B0 - 9V);
• G7 - luminous flux 63-66 lm;
• 27E - light temperature 2700 K.

After carefully reading the detailed information on the manufacturer's website, you can choose and purchase exactly the device you need.