EEF-UD0E221LR Equivalent & Substitute Parts

Part Overview

The EEF-UD0E221LR is a 220 µF, 2.5 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part is classified as obsolete and requires identification of suitable alternatives for new designs and ongoing production support. The SP-Cap UD series has been superseded by newer polymer capacitor lines with improved performance characteristics and extended operational lifetimes.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	2.5 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	9 mOhm
Lifetime @ 105°C	1000 Hrs
Operating Temperature Range	-40°C to +105°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Physical Dimensions	7.30 mm L × 4.30 mm W × 3.00 mm H (max)

Substitute Part Grouping Explanation

Substitution of the EEF-UD0E221LR is determined by strict equivalence in the following parameters:

Capacitance value: 220 µF (exact match required)
Voltage rating: minimum 2.5 V (equal or higher acceptable)
Package / Case: 2917 (7343 Metric) (physical compatibility required)
Mounting type: Surface Mount (footprint compatibility required)
Tolerance: ±20% (electrical tolerance match)

Substitute parts must maintain these core electrical and mechanical specifications. Secondary performance improvements such as lower ESR, extended lifetime, or wider operating temperature range are permissible enhancements that do not compromise compatibility.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	ESR (mOhm)	Lifetime @ 105°C	Temp. Range	Status	Height (mm)
EEF-UD0E221LR	SP-Cap UD	220 µF	2.5 V	9	1000 Hrs	-40 to +105°C	Obsolete	3.00
EEF-CX0E221R	SP-Cap CX	220 µF	2.5 V	15	2000 Hrs	-55 to +105°C	Active	1.90
EEF-SX0D221ER	SP-Cap SX	220 µF	2 V	9	2000 Hrs	-55 to +105°C	Active	2.00
EEF-SX0E221E7	SP-Cap SX	220 µF	2.5 V	7	2000 Hrs	-55 to +105°C	Active	2.00
EEF-SX0E221ER	SP-Cap SX	220 µF	2.5 V	9	2000 Hrs	-55 to +105°C	Active	2.00
EEF-SX0E221R	SP-Cap SX	220 µF	2.5 V	9	2000 Hrs	-55 to +105°C	Not For New Designs	2.00

Engineering Selection Recommendations

For applications currently using EEF-UD0E221LR, the following selection criteria apply:

Primary Recommendation: EEF-SX0E221ER This part maintains identical electrical specifications (220 µF, 2.5 V, 9 mOhm ESR) while offering active product status, extended lifetime (2000 Hrs @ 105°C), and wider operating temperature range (-55 to +105°C). RoHS3 and REACH compliance are confirmed. The reduced height (2.00 mm vs. 3.00 mm) provides improved PCB layout flexibility.

Alternative: EEF-SX0E221E7 Suitable for applications where lower ESR (7 mOhm) provides performance benefits. Maintains 2.5 V rating and active status with RoHS3 compliance. Higher ripple current capability (7 A @ 100 kHz) supports demanding applications.

Voltage-Reduced Alternative: EEF-SX0D221ER For applications with 2 V maximum operating voltage, this part provides identical ESR (9 mOhm) and extended lifetime. Active status and RoHS3 compliance confirmed. Verify voltage margin requirements before selection.

Not Recommended for New Designs: EEF-SX0E221R Although electrically compatible, this part carries "Not For New Designs" status and should be avoided in new product development.

Conditional Use: EEF-CX0E221R Active status and extended lifetime (2000 Hrs @ 105°C) are available. Higher ESR (15 mOhm) may impact ripple current performance in sensitive applications. Verify thermal and ripple current requirements.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0E221ER directly replace EEF-UD0E221LR on existing PCBs? A: Yes. Both parts use the 2917 (7343 Metric) package with identical footprint dimensions (7.30 mm × 4.30 mm). The reduced height of EEF-SX0E221ER (2.00 mm vs. 3.00 mm) does not affect PCB compatibility; the part will mount successfully with standard reflow processes.

Q: What is the difference between EEF-SX0E221ER and EEF-SX0E221E7? A: Both are 220 µF, 2.5 V active parts in the SP-Cap SX series. EEF-SX0E221E7 has lower ESR (7 mOhm vs. 9 mOhm) and higher ripple current capability (7 A vs. 6.3 A @ 100 kHz). Select EEF-SX0E221E7 for applications requiring superior high-frequency performance.

Q: Why is EEF-CX0E221R not the primary recommendation despite active status? A: While active, the EEF-CX0E221R exhibits higher ESR (15 mOhm) compared to the original part (9 mOhm). This increases power dissipation and heat generation in ripple current applications. EEF-SX0E221ER maintains the original ESR specification while providing superior lifetime and compliance.

Q: Can EEF-SX0D221ER be used in place of EEF-UD0E221LR? A: Electrical substitution is possible only if the application operates at 2 V or below. The part is rated for 2 V maximum, which is lower than the original 2.5 V specification. Verify that the circuit design includes adequate voltage margin before selection.

Q: Are all substitute parts RoHS3 compliant? A: EEF-SX0E221ER, EEF-SX0E221E7, EEF-SX0D221ER, and EEF-CX0E221R are confirmed RoHS3 compliant. EEF-SX0E221R compliance status is not specified in available documentation.

Q: What is the impact of the height difference between EEF-UD0E221LR and substitute parts? A: The original part height is 3.00 mm maximum. All substitute parts are 1.90 mm to 2.00 mm maximum height. This reduction improves PCB assembly density and thermal performance without affecting electrical function or mechanical compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message