227LMB400M2CF Equivalent & Substitute Parts

Part Overview

The 227LMB400M2CF is a 220 µF, 400 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMB series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring 3000 hours of operational life at 105°C. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization across compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Tolerance	±20%	—
Voltage - Rated	400	V
ESR @ 120 Hz	2.30259	Ohm
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-25 to 105	°C
Ripple Current @ 120 Hz	1.15	A
Ripple Current @ 10 kHz	1.6905	A
Lead Spacing	0.394 (10.00)	" (mm)
Diameter	0.984 (25.00)	" (mm)
Height - Seated (Max)	1.654 (42.00)	" (mm)
Mounting Type	Through Hole	—
Package / Case	Radial, Can - Snap-In	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—
MSL	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts are classified into four categories based on electrical and mechanical compatibility with the 227LMB400M2CF:

Direct Equivalents (Same Voltage, Same Lifetime): Parts maintaining 400 V rated voltage and 3000 hours lifetime at 105°C with identical mechanical dimensions and lead spacing. These parts are interchangeable without circuit redesign.

Direct Substitutes (Same Voltage, Extended Lifetime): Parts maintaining 400 V rated voltage with extended operational lifetime (5000 or 7000 hours at 105°C). These provide enhanced reliability while preserving electrical compatibility.

Parametric Equivalents (Same Voltage, Same Lifetime, Different ESR): Parts with 400 V rated voltage and 3000 hours lifetime but differing ESR characteristics. Selection depends on ripple current handling requirements.

Upgrade Options (Higher Voltage Rating): Parts rated at 450 V or higher, providing voltage margin above the original 400 V specification. These are suitable for applications requiring enhanced voltage headroom and are mechanically compatible.

Key Substitution Criteria:

Capacitance: 220 µF (fixed)
Tolerance: ±20% (fixed)
Voltage Rating: 400 V minimum (upgrades to 450 V acceptable)
Lead Spacing: 0.394" (10.00 mm) (fixed)
Diameter: 0.984" (25.00 mm) (fixed)
Mounting Type: Through Hole, Radial, Can - Snap-In (fixed)
Polarization: Polar (fixed)
Operating Temperature: -25°C to 105°C (fixed)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C (Hrs)	ESR @ 120 Hz (Ohm)	Height (mm)	Ripple Current @ 120 Hz (A)	Ripple Current @ 10 kHz (A)	Product Status
227LMB400M2CF	Cornell Dubilier / Illinois Capacitor	LMB	220	400	3000	2.30259	42.00	1.15	1.6905	Active
400HXG220MEFCSN25X35	Rubycon	HXG	220	400	3000	—	37.00	1.9	2.66	Active
400MXG220MEFCSN25X35	Rubycon	MXG	220	400	3000	—	37.00	1.37	1.918	Active
400MXK220MEFCSN25X30	Rubycon	MXK	220	400	3000	—	32.00	1.32	1.848	Active
400VXH220MEFCSN25X30	Rubycon	VXH	220	400	5000	—	32.00	1.28	1.792	Active
450MXG220MEFCSN25X40	Rubycon	MXG	220	450	3000	—	42.00	1.44	2.016	Active
ELXM401VSN221MQ40S	Chemi-Con	LXM	220	400	7000	—	42.00	1.14	1.6302	Active
ELXS451VSN221MQ40S	Chemi-Con	LXS	220	450	5000	—	42.50	1.2	1.716	Active
LGN2W221MELA40	Nichicon	LGN	220	450	3000	—	42.00	1.05	—	Active
LGX2W221MELA40	Nichicon	LGX	220	450	5000	—	42.00	1.03	1.4729	Active
381LR221M400J042	Cornell Dubilier Electronics (CDE)	381LR	220	400	3000	0.603	42.00	1.42	2.03	Active

Engineering Selection Recommendations

For Direct Replacement (Same Electrical and Mechanical Specifications):

The 400MXK220MEFCSN25X30 (Rubycon MXK series) and 400VXH220MEFCSN25X30 (Rubycon VXH series) are suitable direct substitutes. Both maintain 400 V rating, 220 µF capacitance, ±20% tolerance, and through-hole radial snap-in packaging. The MXK variant provides 3000 hours lifetime matching the original specification, while the VXH variant extends lifetime to 5000 hours at 105°C. Both are RoHS3 compliant and have reduced height (32.00 mm vs. 42.00 mm), offering space optimization benefits.

For Extended Reliability (Higher Lifetime Rating):

The ELXM401VSN221MQ40S (Chemi-Con LXM series) provides 7000 hours lifetime at 105°C while maintaining 400 V rating and 220 µF capacitance. This part is RoHS compliant and suitable for applications requiring extended operational life. The 400VXH220MEFCSN25X30 (Rubycon VXH series) offers 5000 hours lifetime as an intermediate option.

For Voltage Margin Applications (Higher Voltage Rating):

The 450MXG220MEFCSN25X40 (Rubycon MXG series), ELXS451VSN221MQ40S (Chemi-Con LXS series), LGN2W221MELA40 (Nichicon LGN series), and LGX2W221MELA40 (Nichicon LGX series) are upgrade options rated at 450 V. These parts provide 50 V voltage headroom above the original 400 V specification while maintaining 220 µF capacitance and ±20% tolerance. All are RoHS3 compliant and suitable for circuits requiring enhanced voltage safety margins.

For Parametric Equivalence (Same Voltage and Lifetime, Different ESR):

The 381LR221M400J042 (Cornell Dubilier Electronics 381LR series) maintains 400 V rating and 3000 hours lifetime with lower ESR (0.603 Ohm @ 120 Hz) compared to the original part (2.30259 Ohm @ 120 Hz). This part is suitable for applications where reduced equivalent series resistance improves ripple current handling or thermal performance.

Compliance and Certification:

All substitute parts listed are Active status and RoHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes. MSL rating is 1 (Unlimited) for most parts, indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 400 V 227LMB400M2CF?

A: Yes. A 450 V rated capacitor is electrically compatible with a 400 V circuit. The higher voltage rating provides additional safety margin and does not degrade circuit performance. All mechanical dimensions and lead spacing remain identical, ensuring direct physical compatibility.

Q: What is the difference between the Rubycon MXK and VXH series substitutes?

A: Both the 400MXK220MEFCSN25X30 and 400VXH220MEFCSN25X30 maintain 400 V rating and 220 µF capacitance. The primary difference is operational lifetime: MXK provides 3000 hours at 105°C (matching the original), while VXH extends to 5000 hours at 105°C. The VXH variant also has slightly lower ripple current ratings. Both have reduced height (32.00 mm) compared to the original 42.00 mm.

Q: Does the reduced height of the MXK and VXH variants affect mechanical compatibility?

A: No. The reduced height (32.00 mm vs. 42.00 mm) is a physical advantage that provides space savings in the circuit board layout. Lead spacing (10.00 mm), diameter (25.00 mm), and mounting type (through-hole radial snap-in) remain identical, ensuring direct compatibility with existing PCB footprints.

Q: What is ESR and why does it matter in capacitor selection?

A: Equivalent Series Resistance (ESR) represents the internal resistance of the capacitor at a specified frequency. Lower ESR improves ripple current handling and reduces heat generation. The original 227LMB400M2CF has ESR of 2.30259 Ohm @ 120 Hz. The 381LR221M400J042 substitute offers lower ESR (0.603 Ohm @ 120 Hz), which may be beneficial in high-ripple-current applications.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts listed are packaged as radial, can-style snap-in capacitors with through-hole mounting. Lead spacing is standardized at 0.394" (10.00 mm) across all parts, and diameter is 0.984" (25.00 mm). Height varies between 32.00 mm and 42.50 mm depending on the series, but all are compatible with standard through-hole PCB footprints.

Q: Which substitute offers the best ripple current handling?

A: The 400HXG220MEFCSN25X35 (Rubycon HXG series) provides the highest ripple current ratings: 1.9 A @ 120 Hz and 2.66 A @ 10 kHz, compared to the original 1.15 A @ 120 Hz and 1.6905 A @ 10 kHz. This part is suitable for applications with elevated ripple current requirements.

Q: Can I substitute a Chemi-Con part for a Cornell Dubilier part?

A: Yes. The ELXM401VSN221MQ40S (Chemi-Con LXM series) and ELXS451VSN221MQ40S (Chemi-Con LXS series) are electrically and mechanically compatible with the 227LMB400M2CF. Both maintain the required capacitance, tolerance, voltage rating, and mounting specifications. Chemi-Con parts are RoHS compliant and suitable for direct substitution.

Q: What is the advantage of the Nichicon LGX series over the LGN series?

A: Both Nichicon parts (LGN2W221MELA40 and LGX2W221MELA40) are rated at 450 V with 220 µF capacitance. The primary difference is operational lifetime: LGN provides 3000 hours at 105°C, while LGX extends to 5000 hours at 105°C. The LGX variant offers enhanced reliability for long-term applications.

Q: Are there any restrictions on using these substitute parts in RoHS-regulated applications?

A: No. All substitute parts listed are RoHS3 compliant, meeting the requirements of the Restriction of Hazardous Substances Directive. All parts are also REACH unaffected, indicating compliance with the Registration, Evaluation, Authorization and Restriction of Chemicals regulation.

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