PCG0G122MCL1GS Equivalent & Substitute Parts

Part Overview

The PCG0G122MCL1GS is a 1200 µF, 4 V aluminum polymer capacitor manufactured by Nichicon in the PCG 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, design optimization for improved electrical performance, or dimensional compatibility with specific PCB layouts.

Key Parameters

Parameter	Value
Capacitance	1200 µF
Voltage Rating	4 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	17 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C to 105°C
Ripple Current @ 100 kHz	4 A
Package Type	Radial, Can - SMD
Mounting Type	Surface Mount
Size / Dimension	0.394" Dia (10.00 mm)
Height - Seated (Max)	0.315" (8.00 mm)
Surface Mount Land Size	0.406" L x 0.406" W (10.30 mm x 10.30 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the PCG0G122MCL1GS are qualified based on the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

Capacitance: 1200 µF
Voltage Rating: 4 V
Tolerance: ±20%
Type: Aluminum Polymer
Lifetime @ Temperature: 2000 Hrs @ 105°C
Operating Temperature Range: -55°C to 105°C
Package Type: Radial, Can - SMD
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Variable Parameters (Allowed to Differ):

ESR (Equivalent Series Resistance): May be lower for improved performance
Ripple Current @ High Frequency: May be higher for improved performance
Physical dimensions (diameter, height, land size): May vary within PCB layout constraints
Series designation: May differ between manufacturers or product lines

The PCJ0G122MCL6GS and RHS0G122MCN1GS meet all fixed parameter requirements and represent valid substitutes with improved electrical characteristics.

Parameter Comparison

Parameter	PCG0G122MCL1GS	PCJ0G122MCL6GS	RHS0G122MCN1GS
Manufacturer	Nichicon	Nichicon	Nichicon
Capacitance	1200 µF	1200 µF	1200 µF
Voltage Rating	4 V	4 V	4 V
Tolerance	±20%	±20%	±20%
Type	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer
ESR (mOhm)	17	10	9
Lifetime @ 105°C	2000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Ripple Current @ 100 kHz	4 A	5.5 A	5.4 A
Size / Dimension	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.315" Dia (8.00 mm)
Height - Seated (Max)	0.315" (8.00 mm)	0.394" (10.00 mm)	0.461" (11.70 mm)
Surface Mount Land Size	0.406" L x 0.406" W (10.30 mm x 10.30 mm)	0.406" L x 0.406" W (10.30 mm x 10.30 mm)	0.327" L x 0.327" W (8.30 mm x 8.30 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Affected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain active production status and ROHS3 compliance, qualifying them for use in regulated applications. Selection between PCG0G122MCL1GS, PCJ0G122MCL6GS, and RHS0G122MCN1GS depends on specific design requirements:

PCG0G122MCL1GS (Primary Part): Use when the original specification is required or when ESR of 17 mOhm is acceptable for the application.

PCJ0G122MCL6GS: Use when improved ripple current handling (5.5 A @ 100 kHz versus 4 A) and reduced ESR (10 mOhm) are beneficial. Physical dimensions remain compatible with PCG0G122MCL1GS footprints. Height increases from 8.00 mm to 10.00 mm; verify clearance in the target PCB assembly.

RHS0G122MCN1GS: Use when lowest ESR (9 mOhm) and highest ripple current (5.4 A @ 100 kHz) are required, or when REACH unaffected status is mandated. Note that physical dimensions differ significantly: diameter reduces to 8.00 mm and height increases to 11.70 mm. Land size changes from 10.30 mm to 8.30 mm; PCB layout modification is required.

Frequently Asked Questions (FAQ)

Q: Can PCJ0G122MCL6GS replace PCG0G122MCL1GS directly on the PCB?

A: PCJ0G122MCL6GS shares the same capacitance, voltage rating, tolerance, and land size (10.30 mm x 10.30 mm) as PCG0G122MCL1GS. However, the seated height increases from 8.00 mm to 10.00 mm. Verify that the additional 2.00 mm height does not interfere with adjacent components or enclosure clearance before substitution.

Q: Can RHS0G122MCN1GS replace PCG0G122MCL1GS directly on the PCB?

A: RHS0G122MCN1GS meets all electrical specifications but requires PCB layout modification. The diameter reduces from 10.00 mm to 8.00 mm, the land size changes from 10.30 mm x 10.30 mm to 8.30 mm x 8.30 mm, and the seated height increases from 8.00 mm to 11.70 mm. Direct footprint substitution is not possible without PCB redesign.

Q: What is the significance of ESR differences between these parts?

A: ESR (Equivalent Series Resistance) affects heat generation and voltage ripple in the capacitor. PCG0G122MCL1GS has 17 mOhm ESR, while PCJ0G122MCL6GS has 10 mOhm and RHS0G122MCN1GS has 9 mOhm. Lower ESR reduces power dissipation and improves transient response. Select based on thermal and ripple current requirements of the application.

Q: Are all three parts suitable for high-frequency applications?

A: All three parts are rated for ripple current at 100 kHz. PCG0G122MCL1GS supports 4 A, PCJ0G122MCL6GS supports 5.5 A, and RHS0G122MCN1GS supports 5.4 A at this frequency. Selection depends on the actual ripple current demand in the circuit.

Q: What is the difference between REACH Affected and REACH Unaffected status?

A: REACH Affected indicates the part contains substances of concern that require compliance documentation. REACH Unaffected indicates the part does not contain such substances. If REACH unaffected status is a regulatory requirement, RHS0G122MCN1GS is the appropriate choice.

Q: Do all parts have the same operating temperature range?

A: Yes. All three parts operate from -55°C to 105°C and maintain 2000 hours lifetime at 105°C, ensuring consistent thermal performance across the product line.

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