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MELF/mini-MELF/LL-34 Package 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

BlackBAS32, BAS45, BAV105LL4148, 50, 51,53, LL4448BB241,BB249

Black Brown LL4148, LL914

Black Orange LL4150, BB219Brown Green LL300

Brown Black LL4448

Red BA682

Red Orange BA683

Red Green BA423L

Red WHite LL600

Orange Yellow LL3595

Yellow BZV55,BZV80,BZV81 serieszeners

Green BAV105, BB240

Green Black BAV100

Green Brown BAV101

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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:

CATHODE

BANDMini MELF Device Type

Black General purpose

Yellow Switching

Green Schottky

Blue Zener  

CATHODE

BANDMELF Device Type

Black Zener  

Green Schottky

Rohm LL-34 package Zener Diodes RLZ SeriesThree band colour code Third band is always Green

Type1st

Band

2nd

Band

3rd

BandType

1st

Band

2nd

Band3rd Band

RLZ3.6B Black Purple Green RLZ12B Red Black Green

RLZ3.9B Black Gray Green RLZ13B Red Brown Green

RLZ4.3B Brown White Green RLZ15B Red Red GreenRLZ4.7B Brown Black Green RLZ16B Red Orange Green

RLZ5.1B Brown Brown Green RLZ18B Red Yellow Green

RLZ5.6B Brown Red Green RLZ20B Red Green Green

RLZ6.2B Brown Orange Green RLZ22B Red Blue Green

RLZ6.8B Brown Yellow Green RLZ24B Red Purple Green

RLZ7.5B Brown Green Green RLZ27B Red Gray Green

RLZ8.2B Brown Blue Green RLZ30B Red White Green

RLZ9.1B Black Purple Green RLZ33B Orange Black Green

RLZ10B Black Gray Green RLZ36B Orange Brown Green

RLZ11B Black White Green RLZ39B Orange Red Green