EEF-LL0E151R Equivalent & Substitute Parts

Part Overview

The EEF-LL0E151R is a 150 µF, 2.5 V aluminum polymer surface mount capacitor manufactured by Panasonic Electronic Components in the 2917 (7343 Metric) package. This part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and production continuity. The EEF-LL series represents an earlier generation of Panasonic's polymer capacitor technology with specific electrical characteristics that define substitution eligibility.

Substiute Parts

EEF-LL0E151R

Panasonic Electronic ComponentsIn Stock: 1110EEF-LL0E151R Datasheet

Current PartRFQ

EEF-SL0E151R

Panasonic Electronic ComponentsIn Stock: 2224EEF-SL0E151R Datasheet

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EEF-SX0E151ER

Panasonic Electronic ComponentsIn Stock: 1168EEF-SX0E151ER Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-LL0E151R is determined by the following mandatory parameters:

• Capacitance: 150 µF (exact match required)
• Voltage Rating: 2.5 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package: 2917 (7343 Metric) (exact match required)
• Type: Aluminum Polymer (exact match required)
• Mounting Type: Surface Mount (exact match required)

The following parameters may vary within acceptable engineering limits:

• ESR: Lower values are acceptable (improved performance)
• Lifetime @ Temperature: Equal or higher values are acceptable (improved reliability)
• Operating Temperature Range: Equal or wider ranges are acceptable (expanded capability)
• Product Status: Active parts are preferred over obsolete parts for new designs

Two substitute parts meet these criteria: EEF-SL0E151R and EEF-SX0E151ER.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: EEF-SX0E151ER

The EEF-SX0E151ER is the preferred substitute for the EEF-LL0E151R. This part maintains all critical electrical parameters while offering significant improvements: active product status ensures long-term availability, doubled thermal lifetime (2000 Hrs @ 105°C versus 1000 Hrs), reduced ESR (9 mOhm versus 18 mOhm), expanded operating temperature range (-55°C ~ 105°C), and compliance with ROHS3 and REACH standards. The identical package footprint (2917 / 7343 Metric) ensures direct PCB compatibility without layout modifications.

Secondary Substitute: EEF-SL0E151R

The EEF-SL0E151R provides an alternative substitute with matching electrical specifications and identical thermal lifetime. This part offers reduced ESR (9 mOhm) compared to the main part. However, EEF-SL0E151R retains obsolete product status, limiting its suitability for new designs. This part is appropriate only when EEF-SX0E151ER availability is constrained and existing inventory must be utilized.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0E151ER be used as a direct replacement for EEF-LL0E151R?

A: Yes. Both parts share identical capacitance (150 µF), voltage rating (2.5 V), tolerance (±20%), package (2917 / 7343 Metric), and mounting type (Surface Mount). The EEF-SX0E151ER provides superior performance characteristics with lower ESR, extended thermal lifetime, and wider operating temperature range. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the reduced ESR in substitute parts?

A: ESR (Equivalent Series Resistance) directly affects capacitor performance in high-frequency applications. The EEF-LL0E151R specifies 18 mOhm ESR, while both substitute parts specify 9 mOhm. Lower ESR reduces heat generation, improves ripple current handling, and enhances overall circuit efficiency. This represents an improvement over the original part.

Q: Why is EEF-SX0E151ER preferred over EEF-SL0E151R?

A: EEF-SX0E151ER holds active product status, ensuring continued manufacturing and availability. EEF-SL0E151R is obsolete, creating future supply risk. Additionally, EEF-SX0E151ER provides doubled thermal lifetime (2000 Hrs @ 105°C), expanded temperature range (-55°C ~ 105°C), and regulatory compliance certifications (ROHS3, REACH). For new designs and long-term production, EEF-SX0E151ER is the appropriate selection.

Q: Are there any height or footprint differences between these parts?

A: All three parts use the identical 2917 (7343 Metric) package with matching land size (0.287" L x 0.169" W / 7.30mm x 4.30mm). Seated heights vary slightly: EEF-LL0E151R (1.90mm), EEF-SL0E151R (1.80mm), and EEF-SX0E151ER (2.00mm). These minor variations fall within standard PCB assembly tolerances and do not affect component placement or board-level compatibility.

Q: What packaging formats are available for these substitutes?

A: EEF-LL0E151R packaging format is not specified in available data. EEF-SL0E151R is supplied in Cut Tape (CT) and Digi-Reel® formats. EEF-SX0E151ER is supplied in Tape & Reel (TR) format. Packaging selection should align with procurement and assembly requirements.