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 |
| 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:
| CATHODE BAND | Mini MELF Device Type |
| Black | General purpose |
| Yellow | Switching |
| Green | Schottky |
| Blue | Zener |
| CATHODE BAND | MELF Device Type |
| Black | Zener |
| Green | Schottky |
Rohm LL-34 package Zener Diodes RLZ Series
Three band colour code Third band is always Green
| Type | 1st Band | 2nd Band | 3rd Band | Type | 1st Band | 2nd Band | 3rd 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 | Green |
| RLZ4.7B | 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 |
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 |
| 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:
| CATHODE BAND | Mini MELF Device Type |
| Black | General purpose |
| Yellow | Switching |
| Green | Schottky |
| Blue | Zener |
| CATHODE BAND | MELF Device Type |
| Black | Zener |
| Green | Schottky |
Rohm LL-34 package Zener Diodes RLZ Series
Three band colour code Third band is always Green
| Type | 1st Band | 2nd Band | 3rd Band | Type | 1st Band | 2nd Band | 3rd 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 | Green |
| RLZ4.7B | 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 |