UKL1H2R2MDD Equivalent & Substitute Parts

Part Overview

The UKL1H2R2MDD is a 2.2 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, suitable for general-purpose applications requiring stable capacitance and moderate ripple current handling.

Key Parameters

Parameter	Value
Capacitance	2.2 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	23 mA
Ripple Current @ 10 kHz	46 mA
Lead Spacing	0.079" (2.00 mm)
Case Diameter	0.197" (5.00 mm)
Height (Max)	0.472" (12.00 mm)
Mounting Type	Through Hole
Package	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UKL1H2R2MDD is determined by strict equivalence in the following parameters:

Capacitance: 2.2 µF (exact match required)
Voltage Rating: 50 V (minimum; higher ratings acceptable)
Tolerance: ±20% (or tighter)
Polarization: Polar (radial aluminum electrolytic)
Mounting Type: Through Hole
Lead Spacing: 0.079" (2.00 mm)
Case Diameter: 0.197" (5.00 mm)
Package: Radial, Can

Substitute parts are categorized into three groups:

Direct Equivalents: Parts with identical electrical and mechanical specifications, differing only in series designation or packaging format.

Upgraded Performance: Parts maintaining core electrical parameters (capacitance, voltage, tolerance) while offering enhanced lifetime ratings, extended temperature ranges, or improved ripple current handling.

Cross-Manufacturer Alternatives: Parts from different manufacturers meeting the same electrical and mechanical requirements, providing procurement flexibility.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Height (Max)	Status
UKL1H2R2MDD	Nichicon	2.2 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.472" (12.00 mm)	Obsolete
UVR1H2R2MDD	Nichicon	2.2 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Obsolete
UKL2A2R2KDD	Nichicon	2.2 µF	100 V	±10%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.472" (12.00 mm)	Obsolete
UPJ1H2R2MDD	Nichicon	2.2 µF	50 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.472" (12.00 mm)	Obsolete
UPJ2A2R2MDD	Nichicon	2.2 µF	100 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.472" (12.00 mm)	Obsolete
UPM1H2R2MDD	Nichicon	2.2 µF	50 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50 mm)	Obsolete
UPM2A2R2MDD	Nichicon	2.2 µF	100 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50 mm)	Obsolete
UPV1H2R2MFD	Nichicon	2.2 µF	50 V	±20%	5000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50 mm)	Obsolete
UVR2A2R2MDD	Nichicon	2.2 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Obsolete
225CKR050M	Cornell Dubilier / Illinois Capacitor	2.2 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Active
50PK2R2MEFC5X11	Rubycon	2.2 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Active

Engineering Selection Recommendations

Direct Equivalents for Pin-Compatible Replacement:

UVR1H2R2MDD serves as a direct equivalent with identical electrical specifications. The height difference of 0.020" (0.50 mm) is within typical PCB layout tolerances for through-hole applications. Both parts are ROHS3 compliant and obsolete.

225CKR050M (Cornell Dubilier) and 50PK2R2MEFC5X11 (Rubycon) are active production alternatives meeting identical electrical and mechanical requirements. Both are ROHS3 compliant and currently available, providing long-term procurement security.

Upgraded Performance Options:

UPJ1H2R2MDD and UPM1H2R2MDD maintain 50 V rating while extending operating temperature to -55°C ~ 105°C and lifetime to 2000 hours at 105°C. These are suitable for applications requiring enhanced thermal performance.

UPV1H2R2MFD offers the highest thermal performance with 5000-hour lifetime at 105°C, recommended for demanding thermal environments while maintaining identical voltage and capacitance ratings.

UKL2A2R2KDD and UPJ2A2R2MDD provide 100 V rating with 2.2 µF capacitance, suitable for applications requiring higher voltage margin. UKL2A2R2KDD offers tighter ±10% tolerance.

Compliance and Availability:

All substitute parts are ROHS3 compliant and REACH unaffected. 225CKR050M and 50PK2R2MEFC5X11 maintain active production status, ensuring long-term availability and supply chain stability compared to obsolete Nichicon series.

Frequently Asked Questions (FAQ)

Q: Can UVR1H2R2MDD directly replace UKL1H2R2MDD?

A: Yes. Both parts share identical capacitance (2.2 µF), voltage rating (50 V), tolerance (±20%), lifetime (2000 Hrs @ 85°C), and operating temperature range (-40°C ~ 85°C). The height difference of 0.020" (0.50 mm) is negligible for through-hole PCB layouts.

Q: What is the difference between 50 V and 100 V rated parts?

A: Voltage rating determines the maximum voltage the capacitor can safely withstand. A 100 V rated part (UKL2A2R2KDD, UPJ2A2R2MDD, UVR2A2R2MDD) can be used in 50 V applications but occupies the same physical footprint. Selection depends on circuit voltage requirements and design margin preferences.

Q: Why are some parts listed as obsolete while others are active?

A: Nichicon UKL, UVR, UPJ, UPM, and UPV series are obsolete. Cornell Dubilier 225CKR050M and Rubycon 50PK2R2MEFC5X11 remain in active production, providing current availability and long-term supply assurance.

Q: What does ±20% tolerance mean?

A: Capacitance tolerance of ±20% indicates the actual capacitance value will be within 1.76 µF to 2.64 µF. UKL2A2R2KDD offers tighter ±10% tolerance (1.98 µF to 2.42 µF) for applications requiring closer capacitance control.

Q: Can I use a part with extended temperature range in place of the original?

A: Yes. UPJ1H2R2MDD, UPM1H2R2MDD, and UPV1H2R2MFD extend the operating range to -55°C ~ 105°C. These are backward-compatible for standard -40°C ~ 85°C applications and provide additional thermal margin.

Q: What is the significance of lifetime ratings at different temperatures?

A: Lifetime at temperature indicates expected operational hours before capacitance degradation. UPV1H2R2MFD (5000 Hrs @ 105°C) provides extended service life in high-temperature environments compared to standard 2000-hour ratings.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the lead spacing significance?

A: Lead spacing of 0.079" (2.00 mm) is standardized across all listed parts, ensuring compatibility with existing PCB hole patterns and through-hole footprints.

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