ECO-S2GP121AA Equivalent & Substitute Parts

Part Overview

The ECO-S2GP121AA is a 120 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement.

The TS-UP series capacitor is designed for general-purpose applications requiring 400 V rated voltage with ±20% capacitance tolerance. With 791 pieces currently in stock, alternative parts must maintain electrical and mechanical compatibility while meeting modern compliance requirements.

Substiute Parts

ECO-S2GP121AA

Panasonic Electronic ComponentsIn Stock: 880ECO-S2GP121AA Datasheet

Current PartRFQ

400USG120MEFC20X30

RubyconIn Stock: 661400USG120MEFC20X30 Datasheet

DirectRFQ

400USG120MEFCSN20X30

RubyconIn Stock: 873400USG120MEFCSN20X30 Datasheet

DirectRFQ

LGUW6121MELY

NichiconIn Stock: 1023LGUW6121MELY Datasheet

UpgradeRFQ

LLS2W121MELY

NichiconIn Stock: 987LLS2W121MELY Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECO-S2GP121AA are classified based on the following substitution criteria:

Direct Equivalents maintain all critical electrical parameters: 120 µF capacitance, 400 V voltage rating, ±20% tolerance, and identical mechanical form factor (radial snap-in, 10.00 mm lead spacing, 20.00 mm diameter). These parts are interchangeable without circuit modification.

Upgrade Substitutes increase one or more electrical parameters while maintaining mechanical compatibility:

• Voltage rating increased from 400 V to 420 V or 450 V
• Operating temperature range extended to 105°C
• Lifetime extended to 3000 hours at elevated temperature

All substitute parts maintain the same capacitance (120 µF), tolerance (±20%), package type (radial snap-in), lead spacing (10.00 mm), and diameter (20.00 mm).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Electrical and Mechanical Equivalence):

The 400USG120MEFCSN20X30 (Rubycon USG series) provides direct substitution with improved compliance status. This part maintains 120 µF capacitance, 400 V voltage rating, and identical mechanical dimensions while offering ROHS3 compliance and extended lifetime (3000 hours at 85°C versus 2000 hours). The part is currently in active production with 819 pieces in stock.

The 400USG120MEFC20X30 (Rubycon USG series) is an alternative direct equivalent with identical electrical specifications and extended lifetime, though it carries RoHS non-compliant status. This part is available with 617 pieces in stock.

For Upgraded Performance:

The LGUW6121MELY (Nichicon LGU series) provides voltage margin improvement to 420 V with extended operating temperature range to 105°C and ROHS3 compliance. Height remains at 1.575" (40.00 mm), matching the original part. Lifetime extends to 3000 hours at 105°C.

The LLS2W121MELY (Nichicon LLS series) offers maximum voltage rating at 450 V with ROHS3 compliance and 3000-hour lifetime at 85°C. Height matches the original at 1.575" (40.00 mm).

All substitute parts maintain through-hole mounting compatibility with 10.00 mm lead spacing and 20.00 mm diameter.

Frequently Asked Questions (FAQ)

Q: Can the 400USG120MEFC20X30 directly replace the ECO-S2GP121AA?

A: Yes. Both parts share identical electrical specifications (120 µF, 400 V, ±20% tolerance) and mechanical form factor (radial snap-in, 10.00 mm lead spacing, 20.00 mm diameter). The Rubycon part offers extended lifetime (3000 hours at 85°C) and is in active production. Height difference (32.00 mm versus 40.00 mm) must be verified for PCB clearance in your application.

Q: What is the difference between 400USG120MEFC20X30 and 400USG120MEFCSN20X30?

A: Both are Rubycon USG series parts with identical electrical and mechanical specifications. The primary difference is RoHS compliance status: 400USG120MEFCSN20X30 is ROHS3 compliant, while 400USG120MEFC20X30 is RoHS non-compliant. For new designs or compliance-sensitive applications, the MEFCSN variant is recommended.

Q: Can I use the LGUW6121MELY or LLS2W121MELY as substitutes?

A: Yes, both are compatible substitutes. These Nichicon parts maintain 120 µF capacitance, ±20% tolerance, and identical mechanical form factor. They offer upgraded voltage ratings (420 V and 450 V respectively) and extended operating temperature ranges. Both are ROHS3 compliant and in active production. Use these parts when higher voltage margin or temperature performance is required.

Q: Does the height difference between parts affect compatibility?

A: Height differences must be evaluated for your specific PCB layout. The ECO-S2GP121AA and Nichicon parts (LGUW6121MELY, LLS2W121MELY) are 1.575" (40.00 mm) tall. The Rubycon USG series parts are 1.260" (32.00 mm) tall. Verify clearance above the capacitor location before substitution.

Q: Are all substitute parts currently available?

A: Yes. All substitute parts listed are in active production status with current inventory: 400USG120MEFC20X30 (617 pcs), 400USG120MEFCSN20X30 (819 pcs), LGUW6121MELY (959 pcs), and LLS2W121MELY (929 pcs).

Q: Which substitute offers the best compliance profile?

A: The 400USG120MEFCSN20X30, LGUW6121MELY, and LLS2W121MELY all carry ROHS3 compliance. For new designs, any of these three parts is recommended. The 400USG120MEFCSN20X30 provides direct electrical equivalence with compliance upgrade, while the Nichicon parts add voltage or temperature margin.