Equivalent & Substitute Parts for 188KXM025M

Part Overview

The 188KXM025M is a 1800 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the KXM series. This radial, through-hole component is designed for bypass and decoupling applications with a rated lifetime of 5000 hours at 105°C. The part is currently active in production and ROHS3 compliant.

Substitute parts are identified when they maintain electrical and mechanical compatibility within the allowed parameter tolerances for this capacitor category. Equivalent components must match the core specifications: capacitance value, voltage rating or higher, tolerance, package type, and mounting configuration.

Substiute Parts

188KXM025M

Cornell Dubilier / Illinois CapacitorIn Stock: 1165188KXM025M Datasheet

Current PartRFQ

35JXF1800MEFC12.5X30

RubyconIn Stock: 119435JXF1800MEFC12.5X30 Datasheet

UpgradeRFQ

UPW1E182MHD

NichiconIn Stock: 1166UPW1E182MHD Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the 188KXM025M is based on the following criteria:

Mandatory Matching Parameters:

• Capacitance: 1800 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.197" (5.00mm) (exact match required)
• Diameter: 0.492" (12.50mm) (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage Rating: Substitute must be 25 V or higher
• Height: Substitute must not exceed 1.260" (32.00mm)
• Operating Temperature: Substitute must support -55°C to 105°C range
• RoHS Status: Substitute must be ROHS3 compliant

Two substitute parts meet these criteria:

1. 35JXF1800MEFC12.5X30 (Rubycon JXF series): Voltage-upgraded substitute at 35 V rating with identical mechanical dimensions and lead spacing.

2. UPW1E182MHD (Nichicon UPW series): Direct electrical equivalent at 25 V with matching capacitance and tolerance, though marked as "Not For New Designs."

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

The UPW1E182MHD from Nichicon provides electrical equivalence at the same 25 V rating and 1800 µF capacitance. However, this part carries a "Not For New Designs" status, indicating it is in end-of-life phase. While mechanically and electrically compatible, this substitute is suitable only for legacy system maintenance or repair applications where the original 188KXM025M is unavailable.

For Upgraded Performance:

The 35JXF1800MEFC12.5X30 from Rubycon is an active production part with a higher 35 V voltage rating. This upgrade provides improved voltage margin and extended lifetime (8000 hours at 105°C versus 5000 hours for the original). The mechanical footprint is identical, ensuring direct PCB compatibility. This substitute is appropriate for new designs or applications requiring enhanced reliability margins.

Both substitutes maintain ROHS3 compliance and support the full operating temperature range of -55°C to 105°C. Selection between them depends on design phase (new versus legacy) and performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the 35JXF1800MEFC12.5X30 be used as a direct replacement for the 188KXM025M?

A: Yes. The Rubycon part matches all mandatory mechanical and electrical parameters: 1800 µF capacitance, ±20% tolerance, radial through-hole package, 0.197" lead spacing, and 0.492" diameter. The higher 35 V rating is compatible with circuits designed for 25 V operation. The identical height (1.260" maximum) ensures PCB fit.

Q: Why is the UPW1E182MHD marked "Not For New Designs"?

A: This designation indicates the Nichicon UPW1E182MHD is in end-of-life status. While electrically and mechanically equivalent to the 188KXM025M, it is no longer recommended for new product development. It remains available for repair and maintenance of existing systems.

Q: What is the impact of the voltage rating difference between the 188KXM025M (25 V) and the 35JXF1800MEFC12.5X30 (35 V)?

A: The 35 V rating provides a 40% voltage margin above the original 25 V specification. This does not affect circuit operation in 25 V applications but improves component reliability and extends operational life. No circuit modifications are required.

Q: Are the mechanical dimensions identical across all three parts?

A: The 188KXM025M and 35JXF1800MEFC12.5X30 have identical dimensions: 0.492" diameter, 1.260" maximum height, and 0.197" lead spacing. The UPW1E182MHD has a slightly shorter height of 1.240" (31.50mm), which remains within PCB clearance requirements for standard through-hole layouts.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. Both the 35JXF1800MEFC12.5X30 and UPW1E182MHD are ROHS3 compliant, matching the compliance status of the original 188KXM025M.

Q: What is the difference in ripple current handling between the original and substitutes?

A: The 188KXM025M specifies 1.974 A at 120 Hz and 3.29 A at 100 kHz. The UPW1E182MHD provides 1.964 A at 120 Hz and 2.31 A at 100 kHz, offering comparable low-frequency performance but lower high-frequency ripple current. The 35JXF1800MEFC12.5X30 specifies 1.524 A at 120 Hz with no high-frequency data provided. For applications with high ripple current demands, verify the substitute meets circuit requirements.