UCS2G270MND9 Equivalent & Substitute Parts

Part Overview

The UCS2G270MND9 is a 27 µF, 400 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring polar capacitance in through-hole configurations.

The UCS2G270MND9 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Capacitance	27 µF
Voltage - Rated	400 V
Tolerance	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Lead Spacing	0.138" (4.60 mm)
Size / Dimension	0.315" Dia (8.00 mm)
Height - Seated (Max)	2.047" (52.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the UCS2G270MND9 is determined by the following critical parameters:

Electrical equivalence: Capacitance (27 µF), rated voltage (400 V), and tolerance (±20%) must match exactly
Mechanical compatibility: Lead spacing, case dimensions, and mounting type must accommodate the original PCB layout
Polarization: Polar configuration is mandatory for this application
Compliance: RoHS3 compliance is required for regulatory alignment

Based on these criteria, two substitute parts are identified:

Direct Manufacturer Substitute: UPZ2G270MND9 maintains identical electrical and mechanical specifications with active product status, though with reduced lifetime rating (2,000 Hrs @ 105°C).

Similar Manufacturer Substitute: UCY2G270MHD offers enhanced lifetime (12,000 Hrs @ 105°C) and improved ripple current performance, but features different mechanical dimensions (lead spacing 0.197" vs. 0.138", case diameter 0.492" vs. 0.315", height 0.846" vs. 2.047"), requiring PCB layout verification.

Parameter Comparison

Parameter	UCS2G270MND9 (Main)	UPZ2G270MND9 (Direct)	UCY2G270MHD (Similar)
Manufacturer	Nichicon	Nichicon	Nichicon
Series	UCS	UPZ	UCY
Capacitance	27 µF	27 µF	27 µF
Voltage - Rated	400 V	400 V	400 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C	2,000 Hrs @ 105°C	12,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C	-25°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar	Polar
Lead Spacing	0.138" (4.60 mm)	0.138" (4.60 mm)	0.197" (5.00 mm)
Size / Dimension	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.492" Dia (12.50 mm)
Height - Seated (Max)	2.047" (52.00 mm)	2.047" (52.00 mm)	0.846" (21.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

UPZ2G270MND9 is the direct substitute for applications where PCB layout constraints are strict. This part maintains identical mechanical dimensions and lead spacing, enabling drop-in replacement without layout modification. The reduced lifetime (2,000 Hrs @ 105°C versus 10,000 Hrs @ 105°C) must be evaluated against application duty cycle requirements. Active product status ensures ongoing availability and supply chain support.

UCY2G270MHD is suitable for applications where PCB layout can accommodate larger mechanical dimensions and wider lead spacing. This part offers superior lifetime performance (12,000 Hrs @ 105°C) and higher ripple current capability (360 mA @ 120 Hz, 720 mA @ 100 kHz), making it advantageous for demanding thermal or ripple-current environments. PCB redesign is required due to dimensional differences. Active product status and ROHS3 compliance support long-term availability.

Both substitutes maintain electrical equivalence (27 µF, 400 V, ±20% tolerance) and regulatory compliance (ROHS3). Selection depends on mechanical fit constraints and lifetime requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can UPZ2G270MND9 replace UCS2G270MND9 without PCB modification?

A: Yes. UPZ2G270MND9 maintains identical lead spacing (0.138" / 4.60 mm), case diameter (0.315" / 8.00 mm), and height (2.047" / 52.00 mm), enabling direct substitution on existing PCB layouts.

Q: What is the impact of the reduced lifetime in UPZ2G270MND9?

A: UPZ2G270MND9 is rated for 2,000 Hrs @ 105°C compared to 10,000 Hrs @ 105°C for UCS2G270MND9. This reduction affects long-term reliability in continuous-duty or high-temperature applications. Evaluate application operating conditions and expected service life before selection.

Q: Can UCY2G270MHD be used as a direct replacement?

A: No. UCY2G270MHD has different mechanical dimensions: lead spacing 0.197" (5.00 mm) versus 0.138" (4.60 mm), case diameter 0.492" (12.50 mm) versus 0.315" (8.00 mm), and height 0.846" (21.50 mm) versus 2.047" (52.00 mm). PCB layout modification is required.

Q: Why does UCY2G270MHD have different dimensions despite matching electrical specifications?

A: Different case sizes reflect different internal construction and thermal management designs. Larger dimensions in UCY2G270MHD support higher ripple current handling and extended lifetime performance.

Q: Are all three parts RoHS3 compliant?

A: Yes. UCS2G270MND9, UPZ2G270MND9, and UCY2G270MHD are all ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What is the operating temperature difference between substitutes?

A: UCS2G270MND9 and UCY2G270MHD operate from -40°C to 105°C. UPZ2G270MND9 operates from -25°C to 105°C, with a narrower lower temperature limit. Applications requiring operation below -25°C must use UCS2G270MND9 or UCY2G270MHD.

Q: Which substitute offers the best long-term reliability?

A: UCY2G270MHD provides the highest lifetime rating at 12,000 Hrs @ 105°C. Selection should align with application thermal environment and expected service duration.

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