LP122M200E9P3 Equivalent & Substitute Parts Reference

Part Overview

The LP122M200E9P3 is a 1200 µF, 200 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the LP series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high capacitance and voltage ratings in through-hole mounting configurations. The part is Active status and ROHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved through alternative manufacturers or upgraded series offerings while maintaining core functional parameters: capacitance value, voltage rating, polarization type, mounting style, and lead spacing. Substitution becomes necessary due to inventory availability, extended thermal lifetime requirements, or performance optimization in specific application environments.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	1200	µF	Critical - Must match exactly
Voltage Rating	200	V	Critical - Must match or exceed
Tolerance	±20%	%	Critical - Must match
Polarization	Polar	-	Critical - Must match
Package Type	Radial, Can - Snap-In	-	Critical - Must match
Mounting Type	Through Hole	-	Critical - Must match
Lead Spacing	0.394" (10.00mm)	in (mm)	Critical - Must match for PCB compatibility
Operating Temperature Range	-40°C ~ 105°C	°C	Critical - Must match
Lifetime @ 105°C	1000	Hrs	Important - Higher values indicate improved reliability
ESR @ 120Hz	165	mOhm	Important - Lower values reduce heat generation
RoHS Status	ROHS3 Compliant	-	Regulatory - Must maintain compliance

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution relationship to the main part LP122M200E9P3:

Upgrade Substitutes - Parts offering extended thermal lifetime (2000 Hrs or 3000 Hrs @ 105°C) while maintaining all critical electrical and mechanical parameters. These parts provide enhanced reliability for applications requiring longer operational life.

Similar Substitutes - Parts from the same manufacturer (CDE) with identical electrical specifications but variations in physical dimensions (height or diameter). These parts maintain functional equivalence but require verification of mechanical fit within the application enclosure.

Direct Substitutes - Parts from alternative manufacturers (Nichicon) with matching or superior electrical performance and identical mechanical form factors. These parts provide cross-manufacturer compatibility for supply chain flexibility.

Critical Substitution Parameters:

Capacitance: 1200 µF (exact match required)
Voltage Rating: 200 V minimum (220 V and 250 V rated parts are upgrades)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required for PCB compatibility)
Package: Radial, Can - Snap-In (exact match required)
Mounting: Through Hole (exact match required)
Polarization: Polar (exact match required)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C (Hrs)	ESR @ 120Hz (mOhm)	Height (in / mm)	Diameter (in / mm)	Lead Spacing (in / mm)	Substitution Type
LP122M200E9P3	CDE	LP	1200	200	±20%	1000	165	1.969 / 50.00	1.181 / 30.00	0.394 / 10.00	Main Part
381LQ122M200K032	CDE	381LQ	1200	200	±20%	2000	166	1.457 / 37.00	1.181 / 30.00	0.394 / 10.00	Upgrade
381LQ122M200J052	CDE	381LQ	1200	200	±20%	2000	166	2.047 / 52.00	0.984 / 25.00	0.394 / 10.00	Similar
381LX122M200K042	CDE	381LX	1200	200	±20%	3000	-	1.654 / 42.00	1.181 / 30.00	0.394 / 10.00	Similar
381LX122M200K052	CDE	381LX	1200	200	±20%	3000	166	2.047 / 52.00	1.181 / 30.00	0.394 / 10.00	Similar
LGW2D122MELB40	Nichicon	LGW	1200	200	±20%	3000	-	1.575 / 40.00	1.181 / 30.00	0.394 / 10.00	Direct
LGU2P122MELB	Nichicon	LGU	1200	220	±20%	3000	-	1.969 / 50.00	1.181 / 30.00	0.394 / 10.00	Upgrade
LGW2E122MELB50	Nichicon	LGW	1200	250	±20%	3000	-	1.969 / 50.00	1.181 / 30.00	0.394 / 10.00	Upgrade

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance):

The 381LQ122M200K032 (CDE, 381LQ series) provides direct electrical equivalence with doubled thermal lifetime (2000 Hrs vs. 1000 Hrs @ 105°C). This part is suitable for applications where extended operational life is required without circuit redesign. Physical height is reduced to 1.457" (37.00mm), which may provide space advantages in compact enclosures. ESR remains equivalent at 166 mOhm @ 120Hz.

For Extended Thermal Performance:

The 381LX122M200K052 (CDE, 381LX series) and LGW2D122MELB40 (Nichicon, LGW series) both provide 3000 Hrs @ 105°C thermal rating. The 381LX122M200K052 maintains identical diameter (1.181" / 30.00mm) and lead spacing to the main part, with height of 2.047" (52.00mm). The LGW2D122MELB40 offers equivalent performance with height of 1.575" (40.00mm), providing a more compact profile while maintaining all critical electrical parameters.

For Voltage Margin Enhancement:

The LGU2P122MELB (Nichicon, LGU series, 220 V rating) and LGW2E122MELB50 (Nichicon, LGW series, 250 V rating) provide voltage headroom above the 200 V requirement. These parts are suitable for applications subject to transient overvoltage conditions. Both maintain 3000 Hrs @ 105°C thermal rating and identical mechanical form factor to the main part (1.181" / 30.00mm diameter, 0.394" / 10.00mm lead spacing).

Compliance Verification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the main part LP122M200E9P3. All parts are Active status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 220 V or 250 V rated capacitor in place of the 200 V LP122M200E9P3?

A: Yes. The LGU2P122MELB (220 V) and LGW2E122MELB50 (250 V) are electrical upgrades that provide higher voltage margins. Higher voltage ratings do not degrade performance in 200 V applications. These parts are suitable for circuits where transient overvoltage protection is beneficial.

Q: What is the difference between the 381LQ and 381LX series substitutes?

A: The 381LQ series provides 2000 Hrs @ 105°C thermal lifetime, while the 381LX series provides 3000 Hrs @ 105°C. Both maintain identical electrical specifications (1200 µF, 200 V, ±20% tolerance). The 381LX series is recommended for applications requiring extended operational life or higher reliability margins.

Q: Do all substitute parts have the same physical dimensions?

A: No. While all parts maintain the same lead spacing (0.394" / 10.00mm) and diameter (1.181" / 30.00mm), heights vary. The main part LP122M200E9P3 has height 1.969" (50.00mm). The 381LQ122M200K032 is shorter at 1.457" (37.00mm), while the 381LQ122M200J052 is taller at 2.047" (52.00mm). Verify enclosure clearance before substitution.

Q: Is the Nichicon LGW2D122MELB40 a direct replacement for the CDE LP122M200E9P3?

A: Yes, for electrical function. Both parts are 1200 µF, 200 V, ±20% tolerance, with 3000 Hrs @ 105°C thermal rating and identical lead spacing (0.394" / 10.00mm). The LGW2D122MELB40 has height 1.575" (40.00mm) compared to the main part's 1.969" (50.00mm), providing a more compact profile. Both are ROHS3 compliant and Active status.

Q: What does ESR (Equivalent Series Resistance) mean for capacitor selection?

A: ESR represents the internal resistance of the capacitor at a specified frequency (120Hz in these specifications). Lower ESR values reduce heat generation during ripple current operation. The main part LP122M200E9P3 has 165 mOhm @ 120Hz. Substitute parts with similar or lower ESR values maintain equivalent thermal performance. The 381LX122M200K042 does not specify ESR; verify with manufacturer if ESR performance is critical to your application.

Q: Can I substitute the 381LQ122M200J052 if my PCB has limited vertical clearance?

A: No. The 381LQ122M200J052 has height 2.047" (52.00mm), which is taller than the main part's 1.969" (50.00mm). For space-constrained applications, use the 381LQ122M200K032 (height 1.457" / 37.00mm) or LGW2D122MELB40 (height 1.575" / 40.00mm).

Q: Are all substitute parts in stock?

A: Yes. Inventory status at time of reference: 381LQ122M200K032 (1243 Pcs), 381LQ122M200J052 (2555 Pcs), 381LX122M200K042 (1045 Pcs), 381LX122M200K052 (3216 Pcs), LGW2D122MELB40 (273782 Pcs), LGU2P122MELB (274082 Pcs), LGW2E122MELB50 (273882 Pcs).

Q: What is the difference between ripple current at 120 Hz and 100 kHz?

A: Ripple current specifications at different frequencies indicate the capacitor's ability to handle AC current superimposed on DC voltage. The main part LP122M200E9P3 specifies 2.81 A @ 120 Hz and 3.934 A @ 100 kHz. Higher frequency ripple current capability is important for switching power supply applications. Verify ripple current requirements match your application frequency before substitution.

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