LH351 Analogue Equivalent 3535 SMD LED Diode

1. Why use flip chip packaging?

✅ 1. Superior thermal management

Flip chips are mounted face-down, with the electrodes directly connected to the substrate (e.g., ceramic or copper MCPCB), allowing for a shorter thermal path;

No gold wire obstructs heat flow, improving thermal conductivity;

Well-suited for high-current driving (e.g., 1W, 3W, or even 5W), with lower heat buildup.

✅ 2. Higher reliability

Eliminates gold wire bonding, which avoids issues like wire breakage, shift, or sulfur corrosion;

Better resistance to thermal cycling and environmental stress;

Ideal for automotive lighting, industrial lighting, and high-end flashlights.

✅ 3. Improved luminous efficiency & uniformity

Flip chip structure is more compact and symmetrical, making it easier to control the light shape;

Light output is more uniform and efficient compared to traditional wire-bonded chips.

2. Why use a white dam?

The white dam refers to dispensing a white reflective silicone around the chip, forming a miniature reflective wall.

LH351 Analogue Equivalent 3535 SMD LED Diode with white dam treatmeant cover on the 3535 smd led package (above)	Regular 3535 smd leds white color without white dam cover on the pkg (above)

✅ 1. Enhanced optical efficiency

The white silicone has a high reflectance, helping to redirect side-emitted light upwards;

This improves light extraction and overall luminous efficacy.

✅ 2. Better beam control & reduced glare

The dam shape can be customized to control beam angle and improve light distribution;

Also helps reduce glare by limiting the viewer's direct line of sight to the chip.

✅ 3. Structural support

Once cured, the white dam reinforces the mechanical stability of the chip;

Helps prevent chip movement or delamination under stress.

3. Summary: Advantages of Flip Chip + White Dam in 3535 Packaging

Common Applications

High-power outdoor and industrial lighting

Flashlights and tactical lighting

Automotive headlights and signal lamps

Stage lighting, UV curing lamps

LH351 Analogue Equivalent 3535 SMD LED Diode Pictures

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LH351 Analogue Equivalent 3535 SMD LED Diode dimensions

LH351 Analogue Equivalent 3535 SMD LED Diode Specs

Parameter	Symbol	Conditions	Min	Avg.	Max	Units
Forward Voltage	VF	IF=1000mA	2.80	--	3.20	V
Luminous Flux	Φv	IF=1000mA	450	--	500	lm
Luminous Flux	Φv	IF=1500mA	550	--	650	lm
Color Temperature	CCT	IF=1000mA	5400	--	6100	K
CRI	Ra	IF=1000mA	70	--	--	--
Reverse Current	IR	VR=5V	−−	−−	10	μ A
Viewing Angle	2Θ1/2	IF=1000mA	−−	120	−−	Deg
Thermal Resistance Junction To Board	RΘJ-B	IF=1000mA	--	5	--	°C/W

LH351 Analogue Equivalent 3535 SMD LED Diode Applications

LH351 Analogue Equivalent 3535 SMD LED Diode pplications

 

🔦 Common Applications for LH351 3535 SMD LEDs

Application Area	Explanation
General Lighting	Used in bulbs, downlights, troffers, and panel lights due to high efficacy (up to 220 lm/W in some versions).
Outdoor & Industrial Lighting	Suitable for streetlights, floodlights, high bay/low bay lights due to high-power drive capability and durability.
Flashlights & Portable Lighting	Especially models like LH351 are favored for high lumen output and good beam quality.
Horticulture / Grow Lights	Some variants like LH351 or phosphor-converted types offer specific spectrum wavelengths (deep red, far red, etc.).
Automotive Lighting	Used in headlamps, DRLs, or signal lights due to compact size, thermal reliability, and brightness.
Stage & Studio Lighting	High CRI versions (LH351) are good for camera-friendly environments with excellent color rendering.
Medical & UV-C Disinfection	Although not all LH351 are UV LEDs, similar 3535 ceramic packages (like LH351, UV versions) are used in sterilization devices.
Smart Lighting / Tunable White	High-efficiency white light LEDs are used in smart lighting fixtures supporting dimming and color tuning.

Flashlights & Portable Lighting

LED Wall washer architectural lights

High power drone lights

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Shenzhen Guangmai Electronics Co., Ltd., established in 2009 with a registered capital of 30 million RMB, is an enterprise specializing in the manufacturing of semiconductor packaging devices. Its subsidiaries include Shenzhen Guangmai Technology Co., Ltd., Guangmai Technology (Hong Kong) Co., Ltd., and Shenzhen OKAY Lighting Co., Ltd., forming a powerful corporate group. Guangmai Electronics is a national high-tech enterprise and a specialized and new enterprise in Shenzhen. It has been ranked among the top 100 in China's LED industry and has been awarded honors such as Shenzhen Standard Application Demonstration Unit and Guangdong Integrity Demonstration Enterprise.

 

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