ECO-S2DB122EH Equivalent & Substitute Parts

Part Overview

The ECO-S2DB122EH is a 1200 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making equivalent substitutes necessary for ongoing system support and new production requirements. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 3000 hours at 105°C, serving general-purpose applications requiring high-capacitance energy storage in through-hole configurations.

Key Parameters

Parameter	Value
Capacitance	1200 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Package Diameter	1.378" (35.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Primary Matching Criteria (Non-Negotiable):

Capacitance: 1200 µF (exact match required)
Voltage Rating: 200 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Package Diameter: 1.378" (35.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

Secondary Consideration:

Lifetime @ Temperature: Minimum 2000 Hrs @ 105°C acceptable; 3000 Hrs @ 105°C preferred for direct equivalence

Substitute parts are grouped into two categories:

Direct Equivalent (Identical Specifications): Parts meeting all primary criteria with matching or superior lifetime ratings at rated temperature.

Similar Equivalent (Voltage or Lifetime Variance): Parts meeting all primary criteria but with reduced voltage rating (160 V, 180 V) or reduced lifetime rating (2000 Hrs @ 105°C instead of 3000 Hrs @ 105°C). These are suitable only when application voltage requirements permit or when thermal stress is reduced.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp.	Operating Temp. Range	Lead Spacing	Package Dia.	Height (Max)	Product Status	RoHS Status
ECO-S2DB122EH	Panasonic	1200 µF	200 V	±20%	3000 Hrs @ 105°C	-40°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	—	Obsolete	—
381LX122M200A032	Cornell Dubilier Electronics (CDE)	1200 µF	200 V	±20%	3000 Hrs @ 105°C	-40°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	Active	ROHS3 Compliant
160MXG1200MEFCSN35X25	Rubycon	1200 µF	160 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.063" (27.00 mm)	Active	ROHS3 Compliant
180USG1200MEFC35X25	Rubycon	1200 µF	180 V	±20%	3000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.063" (27.00 mm)	Active	ROHS3 Compliant
200HXC1200MEFC35X35	Rubycon	1200 µF	200 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	Active	RoHS non-compliant
200HXC1200MEFCSN35X35	Rubycon	1200 µF	200 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	Active	ROHS3 Compliant
200MXG1200MEFCSN35X30	Rubycon	1200 µF	200 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.260" (32.00 mm)	Active	ROHS3 Compliant
200SXC1200MEFCSN35X40	Rubycon	1200 µF	200 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.654" (42.00 mm)	Active	ROHS3 Compliant
200USG1200MEFC35X30	Rubycon	1200 µF	200 V	±20%	3000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.260" (32.00 mm)	Active	ROHS3 Compliant
250MXG1200MEFCSN35X35	Rubycon	1200 µF	250 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	Active	ROHS3 Compliant
250USG1200MEFC35X35	Rubycon	1200 µF	250 V	±20%	3000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitutes):

381LX122M200A032 (Cornell Dubilier Electronics) and 200MXG1200MEFCSN35X30 (Rubycon) are direct functional equivalents. Both maintain 1200 µF capacitance, 200 V voltage rating, ±20% tolerance, and 3000 Hrs @ 105°C lifetime. The 381LX122M200A032 is ROHS3 compliant with active product status. The 200MXG1200MEFCSN35X30 is ROHS3 compliant with active status and offers reduced height (1.260" vs. 1.457"), providing potential PCB layout advantages.

Acceptable Substitutes (Voltage-Rated Equivalents):

250MXG1200MEFCSN35X35 and 250USG1200MEFC35X35 provide higher voltage ratings (250 V) with identical capacitance and tolerance. These are suitable for applications where the original 200 V specification provides design margin. Both are ROHS3 compliant and active products with 3000 Hrs @ 105°C lifetime.

Conditional Substitutes (Reduced Lifetime or Voltage):

200HXC1200MEFCSN35X35 and 200SXC1200MEFCSN35X40 maintain 200 V rating but offer reduced lifetime (2000 Hrs @ 105°C). These are acceptable only in applications where thermal stress is limited or where the reduced lifetime does not impact system reliability requirements. Both are ROHS3 compliant and active products.

160MXG1200MEFCSN35X25, 180USG1200MEFC35X25, and 200USG1200MEFC35X30 feature reduced voltage ratings or reduced temperature lifetime. These are suitable only when application voltage requirements are confirmed below the rated value or when operating temperature is constrained below 105°C.

200HXC1200MEFC35X35 is RoHS non-compliant and should be avoided in applications requiring RoHS certification.

Frequently Asked Questions (FAQ)

Q: Can I use a 160 V or 180 V rated capacitor in place of the 200 V ECO-S2DB122EH?

A: Only if your application circuit voltage does not exceed the substitute part's voltage rating. The 160 V and 180 V parts are mechanically and electrically compatible but operate at reduced voltage margin. Verify circuit maximum voltage before substitution.

Q: What is the difference between the 381LX122M200A032 and 200MXG1200MEFCSN35X30?

A: Both are direct equivalents with identical electrical specifications (1200 µF, 200 V, ±20%, 3000 Hrs @ 105°C). The primary difference is physical height: 381LX122M200A032 is 1.457" tall, while 200MXG1200MEFCSN35X30 is 1.260" tall. Select based on available PCB clearance.

Q: Are the 250 V rated parts suitable replacements?

A: Yes. The 250MXG1200MEFCSN35X35 and 250USG1200MEFC35X35 are mechanically and electrically compatible with identical capacitance and tolerance. Higher voltage rating provides additional safety margin and is acceptable in all applications requiring 200 V or less.

Q: What does "ROHS3 Compliant" mean for component selection?

A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive requirements. If your application or customer requires RoHS certification, select only ROHS3 compliant parts. The 200HXC1200MEFC35X35 is RoHS non-compliant and must be avoided in such applications.

Q: Can I substitute a part with 2000 Hrs @ 105°C lifetime for the original 3000 Hrs @ 105°C?

A: Only if your application thermal profile and expected service life permit reduced lifetime. The 200HXC1200MEFCSN35X35 and 200SXC1200MEFCSN35X40 offer 2000 Hrs @ 105°C. Verify that your system does not require the full 3000-hour rating before substitution.

Q: Are all substitute parts through-hole radial snap-in packages?

A: Yes. All listed substitutes maintain the through-hole radial snap-in package configuration with 0.394" (10.00 mm) lead spacing and 1.378" (35.00 mm) diameter. Physical mounting compatibility is preserved across all substitutes.

Q: What is the operating temperature range difference between parts?

A: The original ECO-S2DB122EH operates -40°C to 105°C. Most Rubycon substitutes operate -25°C to 105°C, providing reduced low-temperature performance. If your application requires operation below -25°C, select the 381LX122M200A032 (CDE), 180USG1200MEFC35X25, 200USG1200MEFC35X30, or 250USG1200MEFC35X35, which support -40°C minimum.

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