For a Mean Well IRM-series power supply (IRM-01/02/03/05/10/20/30/45/60), the date code is laser-engraved on the unit. It is read in one of two formats, depending on when it was made.
Interim format, yyWww (starting 2017/7/25, lot Y1708C):
yy: the last two digits of the year
W: a literal “W” for week
ww: the week number
For example, 17W45 would be week 45 of 2017. This format has no factory character.
Final format, Syyww (lots from 2017/10/09, lot Y1710D, onward):
S: a character identifying the factory site
yy: the last two digits of the year
ww: the week number
For example, a code like X1832 would mean factory “X”, year 2018, week 32.
Older units have a sticker serial number in the form E*********, which doesn’t carry a year or week in the format shown in the notice below.
Applicable Part Numbers
| Digikey Part Number | Manufacturer Part Numbers |
|---|---|
| 1866-3052-ND | IRM-30-5ST |
| 1866-3048-ND | IRM-30-24ST |
| 1866-3058-ND | IRM-45-24ST |
| 1866-3068-ND | IRM-60-24ST |
| 1866-3064-ND | IRM-60-12ST |
| 1866-3072-ND | IRM-60-5ST |
| 1866-3066-ND | IRM-60-15ST |
| 1866-3046-ND | IRM-30-15ST |
| 1866-3062-ND | IRM-45-5ST |
| 1866-3070-ND | IRM-60-48ST |
| 1866-3044-ND | IRM-30-12ST |
| 1866-3056-ND | IRM-45-15ST |
| 1866-3054-ND | IRM-45-12ST |
| 1866-3050-ND | IRM-30-48ST |
| 1866-3060-ND | IRM-45-48ST |
| 1866-3012-ND | IRM-03-12 |
| 1866-2998-ND | IRM-01-5 |
| 1866-2990-ND | IRM-01-12 |
| 1866-3009-ND | IRM-02-5 |
| 1866-3016-ND | IRM-03-24 |
| 1866-3020-ND | IRM-03-5 |
| 1866-3018-ND | IRM-03-3.3 |
| 1866-3014-ND | IRM-03-15 |
| 1866-3021-ND | IRM-03-5S |
| 1866-3023-ND | IRM-05-12 |
| 1866-3027-ND | IRM-05-5 |
| 1866-3028-ND | IRM-10-12 |
| 1866-3032-ND | IRM-10-5 |
| 1866-3031-ND | IRM-10-3.3 |
| 1866-3030-ND | IRM-10-24 |
| 1866-3038-ND | IRM-20-12 |
| 1866-3042-ND | IRM-20-5 |
| 1866-3040-ND | IRM-20-24 |
| 1866-3047-ND | IRM-30-24 |
| 1866-3043-ND | IRM-30-12 |
| 1866-3051-ND | IRM-30-5 |
| 1866-3057-ND | IRM-45-24 |
| 1866-3053-ND | IRM-45-12 |
| 1866-3067-ND | IRM-60-24 |
| 1866-3063-ND | IRM-60-12 |
| 1866-3065-ND | IRM-60-15 |
| 1866-3071-ND | IRM-60-5 |
| 1866-2994-ND | IRM-01-24 |
| 1866-3003-ND | IRM-02-15 |
| 1866-3005-ND | IRM-02-24 |
| 1866-3022-ND | IRM-03-9 |
| 1866-3002-ND | IRM-02-12S |
| 1866-3026-ND | IRM-05-3.3 |
| 1866-3024-ND | IRM-05-15 |
| 1866-3025-ND | IRM-05-24 |
| 1866-3059-ND | IRM-45-48 |
| 1866-3011-ND | IRM-02-9 |
| 1866-3010-ND | IRM-02-5S |
| 1866-3019-ND | IRM-03-3.3S |
| 1866-3013-ND | IRM-03-12S |
| 1866-3069-ND | IRM-60-48 |
| 1866-2997-ND | IRM-01-3.3S |
| 1866-5270-ND | IRM-02-9S |
| 1866-3039-ND | IRM-20-15 |
| 1866-3049-ND | IRM-30-48 |
| 1866-3061-ND | IRM-45-5 |
| 1866-2992-ND | IRM-01-15 |
| 1866-3000-ND | IRM-01-9 |
| 1866-3055-ND | IRM-45-15 |
| 1866-3006-ND | IRM-02-24S |
| 1866-2993-ND | IRM-01-15S |
| 1866-2999-ND | IRM-01-5S |
| 1866-2996-ND | IRM-01-3.3 |
| 1866-3001-ND | IRM-02-12 |
| 1866-3007-ND | IRM-02-3.3 |
| 1866-3029-ND | IRM-10-15 |
| 1866-3045-ND | IRM-30-15 |
| 1866-3008-ND | IRM-02-3.3S |
| 1866-3015-ND | IRM-03-15S |
| 1866-3041-ND | IRM-20-3.3 |
| IRM-03-9S-ND | IRM-03-9S |
| 1866-3004-ND | IRM-02-15S |
| 1866-3017-ND | IRM-03-24S |
| 1866-5269-ND | IRM-01-9S |
| 1866-2995-ND | IRM-01-24S |
| 1866-2991-ND | IRM-01-12S |