UAS2D181MHD Equivalent & Substitute Parts

Part Overview

The UAS2D181MHD is a 180 µF, 200 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Active and serves general-purpose applications requiring reliable energy storage and filtering in circuits operating at 200 V. Equivalent and substitute parts are identified based on matching capacitance, voltage rating, physical dimensions, and thermal performance characteristics to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	UAS2D181MHD
Manufacturer	Nichicon
Series	UAS
Capacitance	180 µF
Tolerance	±20%
Voltage - Rated	200 V
Lifetime @ Temp.	2000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C
Lead Spacing	0.295" (7.50mm)
Size / Dimension	0.630" Dia (16.00mm)
Height - Seated (Max)	1.319" (34.60mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the UAS2D181MHD are categorized based on the following electrical and mechanical compatibility criteria:

Upgrade Substitutes (Enhanced Performance):

Capacitance: 180 µF (identical)
Tolerance: ±20% (identical)
Voltage Rating: 250 V (higher than 200 V rated)
Lifetime: 12000 Hrs @ 105°C (extended from 2000 Hrs)
Lead Spacing: 0.295" (7.50mm) (identical)
Size / Dimension: 0.630" Dia (16.00mm) (identical)
Height: 1.299" (33.00mm) (compatible with PCB layout)

Similar Substitutes (Same Voltage Rating):

Capacitance: 180 µF (identical)
Tolerance: ±20% (identical)
Voltage Rating: 200 V (identical)
Lifetime: 12000 Hrs @ 105°C (extended from 2000 Hrs)
Mounting Type: Through Hole (identical)
Package / Case: Radial, Can (identical)

Parameter Comparison

Parameter	UAS2D181MHD	UCY2E181MHD	UCY2D181MHD	EKXJ251ELL181MLN3S
Manufacturer	Nichicon	Nichicon	Nichicon	Chemi-Con
Capacitance	180 µF	180 µF	180 µF	180 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	200 V	250 V	200 V	250 V
Lifetime @ Temp.	2000 Hrs @ 105°C	12000 Hrs @ 105°C	12000 Hrs @ 105°C	12000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Lead Spacing	0.295" (7.50mm)	0.295" (7.50mm)	0.197" (5.00mm)	0.295" (7.50mm)
Size / Dimension	0.630" Dia (16.00mm)	0.630" Dia (16.00mm)	0.492" Dia (12.50mm)	0.630" Dia (16.00mm)
Height - Seated (Max)	1.319" (34.60mm)	1.299" (33.00mm)	1.634" (41.50mm)	1.299" (33.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

UCY2E181MHD (Nichicon) - Recommended for direct upgrade applications. This part maintains identical lead spacing (0.295" / 7.50mm), diameter (0.630" / 16.00mm), and height compatibility (1.299" / 33.00mm) with the UAS2D181MHD. The 250 V rating provides voltage margin above the 200 V requirement. Extended lifetime of 12000 Hrs @ 105°C improves system reliability. ROHS3 compliance and Active product status ensure continued availability.

UCY2D181MHD (Nichicon) - Suitable for applications requiring identical 200 V voltage rating with extended thermal performance. Lead spacing differs at 0.197" (5.00mm) versus 0.295" (7.50mm), and physical dimensions are smaller (0.492" Dia, 1.634" Height). PCB layout modification is required. Lifetime extension to 12000 Hrs @ 105°C provides performance improvement.

EKXJ251ELL181MLN3S (Chemi-Con) - Applicable for automotive-grade applications requiring AEC-Q200 certification. Physical dimensions and lead spacing (0.295" / 7.50mm) match the UAS2D181MHD. 250 V rating and 12000 Hrs @ 105°C lifetime provide enhanced performance. ROHS3 compliance confirmed.

Frequently Asked Questions (FAQ)

Q: Can UCY2E181MHD replace UAS2D181MHD without PCB modification? A: Yes. UCY2E181MHD maintains identical lead spacing (0.295" / 7.50mm), can diameter (0.630" / 16.00mm), and compatible height (1.299" / 33.00mm). Direct substitution on existing PCB layouts is supported.

Q: What is the voltage compatibility between 200 V and 250 V rated parts? A: A 250 V rated capacitor operates safely in circuits designed for 200 V. The higher voltage rating provides operational margin. Reverse substitution (200 V part in 250 V circuit) is not supported.

Q: Does UCY2D181MHD require PCB redesign? A: Yes. Lead spacing is 0.197" (5.00mm) versus 0.295" (7.50mm) on the UAS2D181MHD. Can diameter is 0.492" (12.50mm) versus 0.630" (16.00mm). Height is 1.634" (41.50mm) versus 1.319" (34.60mm). PCB footprint modification is necessary.

Q: Is EKXJ251ELL181MLN3S suitable for non-automotive applications? A: Yes. AEC-Q200 certification indicates automotive-grade reliability. This part meets or exceeds general-purpose application requirements. Automotive-qualified components are acceptable for non-automotive use.

Q: What is the significance of 12000 Hrs @ 105°C lifetime versus 2000 Hrs? A: Lifetime rating indicates expected operational duration at maximum temperature. 12000 Hrs represents 6x longer service life, improving system reliability and reducing failure risk in continuous-duty applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. UAS2D181MHD, UCY2E181MHD, UCY2D181MHD, and EKXJ251ELL181MLN3S are all ROHS3 compliant, meeting environmental and regulatory requirements.

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