EEF-UD0G181LR Equivalent & Substitute Parts

Part Overview

The EEF-UD0G181LR is a 180 µF, 4 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part is classified as obsolete, making substitute components necessary for new designs and production continuity. The part operates across -40°C to 105°C with 9mOhm ESR and 1000 hours lifetime rating at 105°C, serving general purpose applications requiring compact form factor and low impedance characteristics.

Substiute Parts

EEF-UD0G181LR

Panasonic Electronic ComponentsIn Stock: 1059EEF-UD0G181LR Datasheet

Current PartRFQ

EEF-SX0G181ER

Panasonic Electronic ComponentsIn Stock: 877EEF-SX0G181ER Datasheet

DirectRFQ

EEF-CX0G181R

Panasonic Electronic ComponentsIn Stock: 2363EEF-CX0G181R Datasheet

SimilarRFQ

EEF-CX0G181XR

Panasonic Electronic ComponentsIn Stock: 4233EEF-CX0G181XR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the EEF-UD0G181LR is determined by strict equivalence in the following parameters: capacitance (180 µF), voltage rating (4 V), tolerance (±20%), package type (2917/7343 Metric), and surface mount configuration. All substitute parts maintain identical physical footprint and electrical ratings for direct board-level replacement.

Three active substitute parts are available from Panasonic's current product lines:

Direct Substitute (EEF-SX0G181ER): Maintains all core electrical parameters with improved lifetime (2000 Hrs @ 105°C) and extended operating temperature range (-55°C ~ 105°C).

Similar Substitutes (EEF-CX0G181R, EEF-CX0G181XR): Maintain core electrical parameters with variations in ESR and lifetime specifications. Both feature 2000 Hrs @ 105°C lifetime and -55°C ~ 105°C operating range.

Parameter Comparison

Engineering Selection Recommendations

EEF-SX0G181ER is the primary substitute for the EEF-UD0G181LR. It provides identical ESR (9mOhm) matching the original specification while offering doubled lifetime (2000 Hrs @ 105°C) and extended low-temperature operation (-55°C). This part is active in production with ROHS3 compliance and REACH unaffected status.

EEF-CX0G181XR serves as an alternative when EEF-SX0G181ER availability is constrained. It maintains the closest ESR performance (12mOhm versus 9mOhm original) among CX series options and provides equivalent lifetime and temperature range. ROHS3 compliant and actively produced with highest inventory availability (4209 Pcs).

EEF-CX0G181R is suitable for applications where ESR tolerance permits 15mOhm specification. It offers the same lifetime and temperature range as EEF-CX0G181XR with lower ripple current rating (5.1 A @ 100 kHz).

All substitutes maintain identical physical dimensions and surface mount land pattern for direct PCB replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can EEF-CX0G181R and EEF-CX0G181XR be used interchangeably with the original EEF-UD0G181LR?

A: Both parts are electrically and mechanically compatible for board-level substitution. The primary difference is ESR: EEF-CX0G181XR provides 12mOhm (closer to the original 9mOhm), while EEF-CX0G181R specifies 15mOhm. Selection depends on circuit requirements for impedance and ripple current handling.

Q: What is the advantage of EEF-SX0G181ER over the CX series substitutes?

A: EEF-SX0G181ER matches the original 9mOhm ESR specification exactly, eliminating impedance variation. This makes it the preferred direct substitute when ESR-sensitive applications require no circuit re-qualification.

Q: Are all substitute parts RoHS compliant?

A: Yes. EEF-SX0G181ER, EEF-CX0G181R, and EEF-CX0G181XR are all ROHS3 compliant with REACH unaffected status.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the 2917 (7343 Metric) package with identical 0.287" L x 0.169" W (7.30mm x 4.30mm) surface mount land pattern. No PCB layout changes are required.

Q: Why is the EEF-UD0G181LR obsolete?

A: The part has been discontinued by Panasonic. Active production has transitioned to the SP-Cap SX and SP-Cap CX series, which offer improved lifetime ratings and extended temperature range while maintaining electrical equivalence.