EEF-UD0D271R Equivalent & Substitute Parts

Part Overview

The EEF-UD0D271R is a 270 µF, 2 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part operates across -40°C to 105°C with 15mOhm ESR and 1000 hours lifetime rating at 105°C. The product is obsolete, necessitating identification of functionally equivalent alternatives for ongoing applications and new designs.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	2 V
Tolerance	±20%
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Type	Aluminum - Polymer
Operating Temperature Range	-40°C ~ 105°C
ESR (Equivalent Series Resistance)	15mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-UD0D271R is determined by strict electrical and mechanical compatibility:

Mandatory Matching Parameters:

Capacitance: 270 µF (exact match required)
Voltage Rating: 2 V (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Aluminum - Polymer (exact match required)

Allowable Variations:

ESR: Lower values are acceptable (improved performance)
Lifetime @ Temperature: Higher values are acceptable (improved reliability)
Operating Temperature Range: Extended ranges are acceptable
Height - Seated: Minor variations acceptable within physical constraints
Product Status: Active parts preferred over obsolete or not-for-new-designs classifications

All substitute parts listed maintain identical electrical specifications (capacitance, voltage, tolerance) and physical package dimensions, ensuring direct PCB compatibility.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	ESR (mOhm)	Lifetime @ 105°C	Operating Temp Range	Height (Max)	Product Status	RoHS / REACH
EEF-UD0D271R	SP-Cap UD	270 µF	2 V	15	1000 Hrs	-40°C ~ 105°C	0.118" (3.00mm)	Obsolete	—
EEF-CX0D271XR	SP-Cap CX	270 µF	2 V	12	2000 Hrs	-55°C ~ 105°C	0.075" (1.90mm)	Active	ROHS3 / REACH Unaffected
EEF-SX0D271E4	SP-Cap SX	270 µF	2 V	4.5	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	ROHS3 / REACH Unaffected
EEF-SX0D271ER	SP-Cap SX	270 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	ROHS3 / REACH Unaffected
EEF-SX0D271R	SP-Cap SX	270 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Not For New Designs	ROHS3 / REACH Unaffected
EEF-SX0D271XE	SP-Cap SX	270 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	ROHS3 / REACH Unaffected

Engineering Selection Recommendations

For New Designs: EEF-SX0D271E4 is the primary recommendation. This part is Active status, ROHS3 compliant, and offers the lowest ESR (4.5mOhm) with extended lifetime (2000 hours @ 105°C) and expanded operating temperature range (-55°C ~ 105°C). The reduced height (2.00mm) provides additional PCB layout flexibility.

For Existing Production Requiring Direct Replacement: EEF-CX0D271XR provides a direct functional upgrade with Active status, improved ESR (12mOhm vs. 15mOhm), doubled lifetime rating, and ROHS3 compliance. The reduced height (1.90mm) may require PCB footprint verification.

For Cost-Optimized Alternatives: EEF-SX0D271ER and EEF-SX0D271XE offer intermediate ESR values (9mOhm and 6mOhm respectively) with Active status and full compliance certifications.

Not Recommended for New Designs: EEF-SX0D271R carries "Not For New Designs" status and should be used only for legacy system maintenance where part continuity is critical.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D271E4 directly replace EEF-UD0D271R on existing PCBs? A: Yes. Both parts share identical capacitance (270 µF), voltage rating (2 V), tolerance (±20%), and 2917 (7343 Metric) package. The EEF-SX0D271E4 has reduced height (2.00mm vs. 3.00mm), which is mechanically compatible with standard 2917 footprints.

Q: What is the significance of ESR differences between substitute parts? A: ESR determines ripple current handling and heat dissipation. Lower ESR values (EEF-SX0D271E4 at 4.5mOhm) provide superior high-frequency performance. The original EEF-UD0D271R at 15mOhm is the highest; all substitutes offer equal or better ESR performance.

Q: Are all substitute parts RoHS and REACH compliant? A: All substitute parts listed are ROHS3 compliant and REACH unaffected. The original EEF-UD0D271R compliance status is not specified in available data.

Q: Why does EEF-SX0D271R show "Not For New Designs" status? A: This designation indicates the part is available for existing applications but Panasonic does not recommend it for new product development. EEF-SX0D271E4 or EEF-SX0D271ER are preferred alternatives from the SP-Cap SX series.

Q: What is the impact of the extended operating temperature range (-55°C vs. -40°C)? A: Substitute parts rated to -55°C provide broader environmental compatibility. This is a performance enhancement with no negative impact on applications originally designed for -40°C minimum.

Q: Can height differences affect PCB assembly? A: Height variations (1.90mm to 3.00mm) are within standard 2917 package tolerances. Verify PCB clearance for components with reduced height (EEF-CX0D271XR at 1.90mm) in space-constrained layouts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message