PCF0J681MCL1GS Equivalent & Substitute Parts

Part Overview

The PCF0J681MCL1GS is a 680 µF, 6.3 V aluminum polymer capacitor manufactured by Nichicon in the PCF series. This surface mount component is designed for general purpose applications requiring stable capacitance and low equivalent series resistance in compact form factors. The part is currently active in production with RoHS3 compliance and REACH affected status. Substitute parts may be required due to inventory constraints, end-of-life considerations, or application-specific performance requirements such as extended lifetime ratings or improved ESR characteristics.

Key Parameters

Parameter	Value
Capacitance	680 µF
Voltage Rating	6.3 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	14 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C to 105°C
Ripple Current @ 100 kHz	5 A
Package Type	Radial, Can - SMD
Physical Dimensions	0.394" Dia (10.00 mm)
Height (Seated Max)	0.394" (10.00 mm)
Surface Mount Land Size	0.406" L x 0.406" W (10.30 mm x 10.30 mm)
Mounting Type	Surface Mount
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the PCF0J681MCL1GS are classified based on the following substitution criteria:

Upgrade Substitute (PCJ1A681MCL1GS): This Nichicon part maintains identical capacitance (680 µF), tolerance (±20%), physical dimensions (10.00 mm diameter, 10.00 mm height), and surface mount land size (10.30 mm x 10.30 mm). The voltage rating is increased from 6.3 V to 10 V, providing higher voltage margin in the same package. ESR is reduced from 14 mOhm to 13 mOhm, and ripple current capability is 4.82 A @ 100 kHz. This part is suitable for applications where higher voltage headroom is beneficial without requiring board redesign.

Similar Substitute (APXA6R3ARA681MJC0G): This Chemi-Con part matches the original voltage rating (6.3 V), capacitance (680 µF), tolerance (±20%), and physical footprint (10.00 mm diameter, 10.30 mm x 10.30 mm land size). The key differentiator is the extended lifetime rating of 15,000 Hrs @ 105°C compared to 2,000 Hrs @ 105°C in the original part. ESR is improved to 10 mOhm, and ripple current is 5.5 A @ 100 kHz. Height is increased to 0.480" (12.20 mm), requiring verification of available board space. This part is suitable for applications requiring extended operational life at elevated temperatures.

Parameter Comparison

Parameter	PCF0J681MCL1GS (Original)	PCJ1A681MCL1GS (Upgrade)	APXA6R3ARA681MJC0G (Similar)
Manufacturer	Nichicon	Nichicon	Chemi-Con
Series	PCF	PCJ	NPCAP™-PXA
Capacitance	680 µF	680 µF	680 µF
Tolerance	±20%	±20%	±20%
Voltage Rating	6.3 V	10 V	6.3 V
ESR @ 100 kHz	14 mOhm	13 mOhm	10 mOhm
Lifetime @ 105°C	2000 Hrs	2000 Hrs	15000 Hrs
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Ripple Current @ 100 kHz	5 A	4.82 A	5.5 A
Diameter	10.00 mm	10.00 mm	10.00 mm
Height (Seated Max)	10.00 mm	10.00 mm	12.20 mm
Land Size	10.30 mm x 10.30 mm	10.30 mm x 10.30 mm	10.30 mm x 10.30 mm
Package Type	Radial, Can - SMD	Radial, Can - SMD	Radial, Can - SMD
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
REACH Status	REACH Affected	REACH Affected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

PCJ1A681MCL1GS (Nichicon Upgrade): Select this part when circuit design permits operation at 10 V rated voltage. Both parts maintain RoHS3 compliance and REACH affected status. The upgrade provides marginal ESR improvement (1 mOhm reduction) and maintains identical physical footprint and height, eliminating board redesign requirements. Ripple current is slightly reduced to 4.82 A @ 100 kHz; verify this meets application requirements.

APXA6R3ARA681MJC0G (Chemi-Con Similar): Select this part for applications requiring extended operational life at elevated temperatures. The 15,000 Hrs @ 105°C lifetime rating provides 7.5× longer service life than the original part. ESR is improved to 10 mOhm with increased ripple current capability (5.5 A @ 100 kHz). The increased height of 12.20 mm requires clearance verification on the PCB. This part carries REACH Unaffected status, which may be advantageous for certain supply chain requirements. Both Nichicon and Chemi-Con parts maintain RoHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can PCJ1A681MCL1GS be used as a direct replacement for PCF0J681MCL1GS?

A: Yes, with circuit verification. The PCJ1A681MCL1GS maintains identical capacitance, tolerance, physical dimensions, and land size. The 10 V voltage rating is higher than the original 6.3 V specification. Confirm that the circuit design does not depend on the lower voltage rating and that the 4.82 A ripple current capability at 100 kHz meets application requirements.

Q: What is the primary advantage of APXA6R3ARA681MJC0G over the original part?

A: The APXA6R3ARA681MJC0G provides a 7.5× longer lifetime rating (15,000 Hrs @ 105°C versus 2,000 Hrs @ 105°C) with improved ESR (10 mOhm versus 14 mOhm) and higher ripple current capability (5.5 A @ 100 kHz versus 5 A @ 100 kHz). The trade-off is increased height (12.20 mm versus 10.00 mm), which requires PCB clearance verification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. PCF0J681MCL1GS, PCJ1A681MCL1GS, and APXA6R3ARA681MJC0G are all RoHS3 compliant. The APXA6R3ARA681MJC0G carries REACH Unaffected status, while the Nichicon parts are REACH Affected.

Q: Do the substitute parts require PCB layout modifications?

A: PCJ1A681MCL1GS requires no layout changes; it maintains identical physical dimensions and land size. APXA6R3ARA681MJC0G requires clearance verification due to increased height (12.20 mm versus 10.00 mm). The land size remains 10.30 mm x 10.30 mm for all parts.

Q: What is the impact of ESR differences on circuit performance?

A: Lower ESR reduces voltage ripple and heat dissipation. APXA6R3ARA681MJC0G (10 mOhm) provides the lowest ESR, followed by PCJ1A681MCL1GS (13 mOhm) and PCF0J681MCL1GS (14 mOhm). Select based on ripple voltage and thermal management requirements of the application.

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