LED (5 mm) Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

T-1¾ (5 mm)

Physical pin numbers2 pins

Scroll within the table to see all columns and rows.

LED (5 mm) pin functions and connections
Pin	Signal	Type	Function & connection
	A	Anode (+)	The longer lead. Conventional current enters here when the LED is forward biased. Connection guidance Connect to the supply or a microcontroller pin through the series resistor. Forward voltage at 20 mA: 1.85 V red, 2.2 V green, 2.0 V yellow, 3.3 V blue and white (typical).
	K	Cathode (−)	The shorter lead, next to the flat on the flange. Current leaves the LED here. Connection guidance Connect to ground (or to a pin that sinks current). Never more than 5 V reverse: the LED is not a rectifier.

Selected family and polarity

Manufacturer scope and page conventions

Manufacturer-referenced values6 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Reference family	Kingbright WP7113, 5 mm (T-1¾)	One product specification per colour
Parts	WP7113SRC/DU red · SGD green · SYD yellow · QBC/D blue · QWC/D white	One package; the 3D view shows the blue part
Anode	Long lead · pin 1 · pad A	Conventional current enters here
Cathode	Short lead, flat on the flange · pin 2 · pad K	Connect toward ground
Lens	Ø5.0 mm, water clear or diffused by part	Viewing angle 20–30° (2θ½)
Lead spacing	2.54 mm	0.5 mm square leads

Polarity is marked twice: the shorter lead and the flat. Trim the leads only after noting the anode.

The five colours

Typical at 20 mA and 25 °C unless stated

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Colour	Part	Vf typ / max (V)	IF max (mA)	Peak IF (mA)	PD (mW)	Iv typ (mcd)	λdom (nm)	2θ½ (°)	Chip
Red	WP7113SRC/DU	1.85 / 2.5	30	155	75	1300	640	20	GaAlAs
Green	WP7113SGD	2.2 / 2.5	25	140	62.5	40	568	30	GaP
Yellow	WP7113SYD	2 / 2.5	30	150	75	1200	590	30	AlGaInP
Blue	WP7113QBC/D	3.3 / 4	30	150	120	4500	465	20	InGaN
White	WP7113QWC/D	3.3 / 4	30	150	120	3600	x 0.31, y 0.31	20	InGaN + phosphor

Peak IF: 1/10 duty cycle, 0.1 ms pulse. Luminous intensity ±15 %. ProTech’s LED colour presets take exactly these values.

Absolute maximum ratings

At 25 °C · stress limits, not operating conditions

Manufacturer-referenced values7 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Continuous forward current	30 mA (green 25 mA)	Derate above about 25 °C to about 5 mA at 85 °C
Peak forward current	140–155 mA by colour	1/10 duty cycle, 0.1 ms pulse
Power dissipation	75 mW red and yellow · 62.5 mW green · 120 mW blue and white	PD at 25 °C
Reverse voltage	5 V	IR ≤ 10 µA red, green, yellow; ≤ 50 µA blue, white
Junction temperature	115 °C (green 110 °C)	Maximum
Operating and storage temperature	−40 to +85 °C	Ambient
Electrostatic discharge (HBM)	3 kV red, yellow · 8 kV green · 250 V blue, white	Handle InGaN parts with ESD care

Exceeding any one of these can damage the LED even if the others are respected.

Electrical and thermal characteristics

Typical unless stated

Manufacturer-referenced values6 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Forward voltage temperature coefficient	−1.9 to −2 mV/°C red, green, yellow · −3 mV/°C blue, white	Vf falls as the junction heats
Thermal resistance, junction to ambient	580 red · 590 green, yellow · 610 blue · 570 white °C/W	On FR4
Luminous intensity tolerance	±15 %	At 20 mA
Brightness against current	Roughly proportional	Within the rated current; efficiency falls when hot
Reverse current	≤ 10 µA (red, green, yellow) · ≤ 50 µA (blue, white)	VR = 5 V
Self-heating example	26 mW × 580 °C/W ≈ 15 °C rise	Red at 14.3 mA, 1.85 V

Forward voltage spreads between parts of the same colour; never wire LEDs in parallel without a resistor each.

Series resistor from a 5 V pin

R = (5 V − Vf) / I

Manufacturer-referenced values9 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Red at 20 mA	160 Ω (E24)	(5 − 1.85) / 0.020 = 157.5 Ω, next E24 value above
Green at 20 mA	150 Ω (E24)	(5 − 2.2) / 0.020 = 140 Ω, next E24 value above
Yellow at 20 mA	150 Ω (E24)	(5 − 2) / 0.020 = 150 Ω, next E24 value above
Blue at 20 mA	91 Ω (E24)	(5 − 3.3) / 0.020 = 85 Ω, next E24 value above
White at 20 mA	91 Ω (E24)	(5 − 3.3) / 0.020 = 85 Ω, next E24 value above
Red with 220 Ω	14.3 mA	(5 − 1.85) / 220 Ω, typical Vf
Green with 220 Ω	12.7 mA	(5 − 2.2) / 220 Ω, typical Vf
Yellow with 220 Ω	13.6 mA	(5 − 2) / 220 Ω, typical Vf
Blue and white with 220 Ω	7.7 mA	(5 − 3.3) / 220 Ω, typical Vf

A microcontroller pin drops a little voltage under load, so the measured current is slightly lower (ProTech’s LED example shows 12.9 mA red, 7.2 mA blue).

Package

WP7113QBC/D · T-1¾ (5 mm)

Manufacturer-referenced values5 parameters

Scroll within the table to see all columns and rows.

Parameter	Value	Conditions / notes
Lens	Ø5.0 mm	Domed epoxy
Flange	Ø5.9 mm, 1.0 mm thick	The flat marks the cathode
Height	8.6 mm	From the flange’s foot to the dome
Leads	0.5 mm square, 2.54 mm apart, 27 mm minimum	Through-hole
Footprint	Pads A and K, 2.54 mm apart	2.032 mm square pads, 1.016 mm drill

Mechanical tolerance ±0.25 mm unless the sheet states otherwise.