This document provides information about MELF, mini-MELF, and LL-34 packaged diodes, including their dimensions and common device types. It describes code markings for zener diodes and lists various manufacturers' cathode band color codes that indicate the diode type. Finally, it shows Rohm's three-band color code for its LL-34 packaged RLZ Series zener diodes.
This document provides information about MELF, mini-MELF, and LL-34 packaged diodes, including their dimensions and common device types. It describes code markings for zener diodes and lists various manufacturers' cathode band color codes that indicate the diode type. Finally, it shows Rohm's three-band color code for its LL-34 packaged RLZ Series zener diodes.
This document provides information about MELF, mini-MELF, and LL-34 packaged diodes, including their dimensions and common device types. It describes code markings for zener diodes and lists various manufacturers' cathode band color codes that indicate the diode type. Finally, it shows Rohm's three-band color code for its LL-34 packaged RLZ Series zener diodes.
This document provides information about MELF, mini-MELF, and LL-34 packaged diodes, including their dimensions and common device types. It describes code markings for zener diodes and lists various manufacturers' cathode band color codes that indicate the diode type. Finally, it shows Rohm's three-band color code for its LL-34 packaged RLZ Series zener diodes.
The SOD-80 package, also known as mini-MELF, is a small ( glass, sometimes plastic) cylinder with metal ends. MELF package L=4.9mm D=2.5mm mini-MELF (SOD80C) L=3.5mm D=1.6mm LL-34 L=3.4mm D= 1.4mm
Code marked devices
Marked 2Y4 to 75Y (E24 series) BZV49 series 1W zener diodes (2.4 - 75V) Marked C2V4 TO C75 (E24 series) BZV55 series 500mW zener diodes (2.4 - 75V) The cathode end is indicated by a coloured band.
Coloured band marked devices (MELF/SOD-80)
CATHODE BAND(S)
Device
Black
BAS32, BAS45, BAV105
LL4148, 50, 51,53, LL4448 BB241,BB249
Black Brown
LL4148, LL914
Black Orange
LL4150, BB219
Brown Green
LL300
Brown Black
LL4448
Red
BA682
Red Orange
BA683
Red Green
BA423L
Red WHite
LL600
Orange Yellow
LL3595
Yellow
BZV55,BZV80,BZV81 series zeners
Green
BAV105, BB240
Green Black
BAV100
Green Brown
BAV101
Green Red
BAV102
Green Orange
BAV103
Grey
BAS81, 82, 83, 85, 86
White
BB219
White Green
BB215
Some manufacturers have a generic type coding scheme for MELF and mini-MELF diodes. That for Vishay/General Semiconductor is shown below:
