KXG400VB101M18X31LL Equivalent & Substitute Parts

Part Overview

The KXG400VB101M18X31LL is a 100 µF, 400 V aluminum electrolytic capacitor in radial, can package manufactured by Chemi-Con. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently obsolete, necessitating identification of equivalent and substitute components to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage - Rated	400 V
Tolerance	±20%
Operating Temperature Range	-40°C ~ 105°C
Lifetime @ Temperature	10,000 Hrs @ 105°C
Ripple Current @ 120 Hz	765 mA
Ripple Current @ 100 kHz	1.72125 A
Lead Spacing	0.295" (7.50 mm)
Size / Dimension	0.709" Dia (18.00 mm)
Height - Seated (Max)	1.240" (31.50 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the KXG400VB101M18X31LL is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Capacitance: 100 µF (exact match required)
Voltage Rating: 400 V minimum (equal or higher voltage rating acceptable)
Tolerance: ±20% (standard tolerance for aluminum electrolytic capacitors)
Operating Temperature Range: -40°C ~ 105°C (minimum requirement)
Mounting Type: Through Hole (mechanical compatibility)
Package / Case: Radial, Can (form factor compatibility)
Lead Spacing: 0.295" (7.50 mm) (PCB layout compatibility)
Size / Dimension: 0.709" Dia (18.00 mm) (footprint compatibility)

Substitute Categories:

Parametric Equivalent: EKXG401ELL101MMN3S (Chemi-Con KXG series) - Identical electrical specifications with improved product status (Active vs. Obsolete) and RoHS3 compliance.
Upgrade Substitutes: 420BXW100MEFR18X30 and 450BXW100MEFR18X30 (Rubycon BXW series) - Higher voltage ratings (420 V and 450 V respectively) with extended lifetime (12,000 hours @ 105°C) and RoHS3 compliance. These components provide enhanced performance margins while maintaining mechanical compatibility.

Parameter Comparison

Parameter	KXG400VB101M18X31LL	EKXG401ELL101MMN3S	420BXW100MEFR18X30	450BXW100MEFR18X30
Manufacturer	Chemi-Con	Chemi-Con	Rubycon	Rubycon
Capacitance	100 µF	100 µF	100 µF	100 µF
Voltage - Rated	400 V	400 V	420 V	450 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ Temp.	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C	12,000 Hrs @ 105°C	12,000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Ripple Current @ 120 Hz	765 mA	765 mA	780 mA	750 mA
Ripple Current @ 100 kHz	1.72125 A	1.72125 A	1.755 A	1.688 A
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Size / Dimension	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)
Height - Seated (Max)	1.240" (31.50 mm)	1.240" (31.50 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

EKXG401ELL101MMN3S (Parametric Equivalent): This substitute is the primary equivalent for direct replacement of the KXG400VB101M18X31LL. It maintains identical electrical specifications (100 µF, 400 V, 10,000 hours @ 105°C) and mechanical dimensions. The component is manufactured by Chemi-Con in the same KXG series, ensuring design continuity. The part is currently in Active product status with RoHS3 compliance, addressing the obsolescence of the original component. This substitute is suitable for applications where the original specifications are sufficient and regulatory compliance is required.

420BXW100MEFR18X30 (Upgrade Substitute): This Rubycon component provides enhanced performance through increased voltage rating (420 V vs. 400 V) and extended lifetime (12,000 hours vs. 10,000 hours @ 105°C). The higher voltage rating provides additional design margin for applications operating near the rated voltage. Mechanical compatibility is maintained with identical lead spacing and can diameter. Height increases by 0.020" (0.50 mm), which must be verified against PCB clearance constraints. RoHS3 compliance is provided. This substitute is applicable for designs requiring improved reliability margins.

450BXW100MEFR18X30 (Upgrade Substitute): This Rubycon component offers the highest voltage rating (450 V) among available substitutes, providing maximum design margin for voltage stress. Lifetime rating matches the 420BXW100MEFR18X30 at 12,000 hours @ 105°C. Mechanical compatibility is identical to the 420BXW100MEFR18X30. RoHS3 compliance is provided. This substitute is applicable for designs requiring maximum voltage headroom and extended operational life.

All substitute components are Active products with RoHS3 compliance, addressing both the obsolescence and regulatory requirements of the original part.

Frequently Asked Questions (FAQ)

Q: Can EKXG401ELL101MMN3S be used as a direct replacement for KXG400VB101M18X31LL?

A: Yes. EKXG401ELL101MMN3S is a parametric equivalent with identical electrical specifications (100 µF, 400 V, 10,000 hours @ 105°C) and mechanical dimensions (lead spacing, can diameter, height). The component is pin-compatible and footprint-compatible for through-hole PCB applications.

Q: What is the difference between the parametric equivalent and upgrade substitutes?

A: The parametric equivalent (EKXG401ELL101MMN3S) maintains the exact specifications of the original part. The upgrade substitutes (420BXW100MEFR18X30 and 450BXW100MEFR18X30) provide higher voltage ratings and extended lifetime. All three are mechanically compatible with the original design.

Q: Can the Rubycon BXW series components be used in place of the Chemi-Con KXG series?

A: Yes, provided the application requirements are met. The 420BXW100MEFR18X30 and 450BXW100MEFR18X30 maintain the same lead spacing (0.295" / 7.50 mm), can diameter (0.709" / 18.00 mm), and mounting type (through-hole radial). Height increases by 0.020" (0.50 mm) must be verified against PCB clearance. Electrical specifications are compatible or superior to the original part.

Q: Are there height clearance concerns with the upgrade substitutes?

A: The upgrade substitutes (420BXW100MEFR18X30 and 450BXW100MEFR18X30) have a maximum seated height of 1.260" (32.00 mm) compared to 1.240" (31.50 mm) for the original part. This 0.020" (0.50 mm) increase must be verified against component placement constraints, heatsinks, or enclosure clearances in the specific application.

Q: What is the significance of RoHS3 compliance for these substitutes?

A: All substitute components are RoHS3 compliant, whereas the original KXG400VB101M18X31LL is RoHS non-compliant. RoHS3 compliance is required for products sold in regulated markets and indicates compliance with restrictions on hazardous substances. This is a regulatory advantage of the substitute components.

Q: Can the higher voltage-rated substitutes be used in applications designed for 400 V?

A: Yes. The 420BXW100MEFR18X30 (420 V) and 450BXW100MEFR18X30 (450 V) can be used in applications rated for 400 V operation. Higher voltage ratings provide additional design margin and do not degrade performance in lower-voltage applications. The capacitance (100 µF) and tolerance (±20%) remain identical.

Q: What are the ripple current differences among the substitutes?

A: Ripple current specifications vary slightly among the components. The parametric equivalent (EKXG401ELL101MMN3S) matches the original at 765 mA @ 120 Hz and 1.72125 A @ 100 kHz. The 420BXW100MEFR18X30 provides slightly higher ripple current capability (780 mA @ 120 Hz, 1.755 A @ 100 kHz). The 450BXW100MEFR18X30 provides 750 mA @ 120 Hz and 1.688 A @ 100 kHz. Selection should be based on application ripple current requirements.

Q: Is the ±20% tolerance maintained across all substitutes?

A: Yes. All substitute components maintain the ±20% capacitance tolerance, consistent with the original part and standard for aluminum electrolytic capacitors in this category.

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