Garage Door Openers · parts
Linear LDO33 vs LDO50: match the capacitor to the exact model
For the base Linear LDO models, the OEM 221377 Rev-S replacement-parts table makes a direct capacitor distinction: LDO33 uses 219109, a 1/3-HP 43–53-MFD capacitor marked “for LDO33 only”; LDO50 uses 219110, a 1/2-HP 53–64-MFD capacitor marked “for LDO50 only.” The official manuals index lists separate LDO33 and LDO50 product rows with installation, user, literature, and replacement-parts links. Match the full model plate before a technician orders a capacitor. This comparison is one page covering two exact model-to-part mappings; it does not claim an interchangeable family part.
Safety boundary
- Read the complete model label; have a qualified technician verify the part number and rating before purchase.
- Do not open the operator or handle internal capacitors, wiring, motors, or control boards; have electrical service performed by a qualified technician.
- Maintain required safety-beam and automatic-reversal protection; do not bypass it.
Compatibility requires a direct model listing, explicit supersession, or equivalent manufacturer evidence.
Models explicitly covered
These model identities have the source evidence listed below. Read the part decision and suffix limits before ordering.
Required identifiers
- Exact opener label: LDO33 or LDO50; do not infer from appearance or age
- Existing part number and capacitor rating from service documentation or technician identification
Compatibility rules
- The Rev-S table says LDO33 only for 1/3-HP, 43–53-MFD capacitor 219109.
- The same table says LDO50 only for 1/2-HP, 53–64-MFD capacitor 219110.
- Linear’s manuals index lists LDO33 and LDO50 as separate exact-model rows with individual manual and parts-list links.
Never assume
- 219109 and 219110 are interchangeable because both are capacitors for Linear LDO openers.
- The horsepower/MFD values or part numbers can be inferred without checking the exact model label and current OEM documentation.
- Capacitor identification is an instruction to handle, discharge, or replace the component yourself.
Two exact model-to-capacitor mappings
- LDO33: 219109, 1/3 HP, 43–53 MFD, listed for LDO33 only.
- LDO50: 219110, 1/2 HP, 53–64 MFD, listed for LDO50 only.
Check the source revision and model label
Nice/Linear’s current public replacement list used here is printed 221377 Rev-S. Its filename and printed footer now agree. Verify the full operator label and ask Linear or a qualified service provider to confirm current orderability and applicability.
Owner-safe boundary
This comparison identifies catalog-listed capacitor references only. It contains no internal electrical testing or replacement procedure.