UHM1A102MPD Equivalent & Substitute Parts

Part Overview

The UHM1A102MPD is a 1000 µF, 10 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Obsolete, indicating it is no longer in active production. The UHM series provides general-purpose energy storage with a rated lifetime of 2000 hours at 105°C and an operating temperature range of -40°C to 105°C. Due to its obsolete status, equivalent and substitute parts from active or alternative product lines are necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Capacitance	1000 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Height (Max)	0.689" (17.50 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the UHM1A102MPD is determined by the following critical parameters:

Capacitance Value: 1000 µF (exact match required)
Voltage Rating: Minimum 10 V (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (standard tolerance for general-purpose applications)
Physical Dimensions: Lead spacing 0.197" (5.00 mm), case diameter 0.394" (10.00 mm), height 0.689" (17.50 mm) for direct PCB compatibility
Mounting Type: Through Hole radial configuration
Polarization: Polar (aluminum electrolytic)

Substitute parts are grouped into two categories:

Upgrade Substitutes (Enhanced Performance): Parts with identical or superior electrical characteristics, including higher voltage ratings (16 V) or extended lifetime ratings (4000–10000 hours at 105°C). These provide improved reliability margins while maintaining mechanical compatibility.

Similar Substitutes (Equivalent Performance): Parts with matching capacitance and voltage but different physical dimensions or slightly different electrical characteristics. These require PCB layout verification before implementation.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Impedance	Lead Spacing	Case Diameter	Height	Product Status	RoHS Status
UHM1A102MPD	Nichicon	UHM	1000 µF	10 V	2000 Hrs	18 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Obsolete	Not Specified
UHV1C102MPD	Nichicon	UHV	1000 µF	16 V	6000 Hrs	30 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHW1C102MPD	Nichicon	UHW	1000 µF	16 V	10000 Hrs	30 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UKA1A102MPD	Nichicon	UKA	1000 µF	10 V	2000 Hrs	Not Specified	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UKA1C102MPD	Nichicon	UKA	1000 µF	16 V	2000 Hrs	Not Specified	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UPA1A102MPD3	Nichicon	UPA	1000 µF	10 V	4000 Hrs	49 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant
UPA1C102MPD	Nichicon	UPA	1000 µF	16 V	4000 Hrs	49 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant
UPS1A102MPD	Nichicon	UPS	1000 µF	10 V	2000 Hrs	140 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHD1A102MPD	Nichicon	UHD	1000 µF	10 V	3000 Hrs	41 mOhms	0.138" (4.60 mm)	0.315" (8.00 mm)	0.866" (22.00 mm)	Not For New Designs	ROHS3 Compliant
UHD1A102MPD6	Nichicon	UHD	1000 µF	10 V	4000 Hrs	38 mOhms	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHE1A102MPD	Nichicon	UHE	1000 µF	10 V	6000 Hrs	69 mOhms	0.138" (4.60 mm)	0.315" (8.00 mm)	0.787" (20.00 mm)	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Direct Mechanical Replacement (Identical PCB Footprint)

Parts maintaining the exact lead spacing of 0.197" (5.00 mm), case diameter of 0.394" (10.00 mm), and height of 0.689" (17.50 mm) are suitable for direct substitution without PCB modification:

UPA1A102MPD3 (Active status): Recommended for new designs. Provides 4000-hour lifetime at 105°C with ROHS3 compliance. Impedance of 49 mOhms is higher than the original UHM1A102MPD (18 mOhms), which may affect ripple current performance in noise-sensitive applications.
UHV1C102MPD and UHW1C102MPD (16 V ratings): Offer voltage margin above the 10 V requirement. UHW1C102MPD provides extended 10000-hour lifetime. Both are ROHS3 compliant but carry "Not For New Designs" status.
UPA1C102MPD (Active status, 16 V): Combines active product status with elevated voltage rating and 4000-hour lifetime. ROHS3 compliant.

Alternative Mechanical Configuration (PCB Layout Verification Required)

Parts with different physical dimensions require PCB layout assessment:

UHD1A102MPD6: Matches lead spacing and case diameter of the original but differs in height (0.689" vs. original). Provides 4000-hour lifetime with lower impedance (38 mOhms) than UPA1A102MPD3.
UHD1A102MPD and UHE1A102MPD: Smaller case diameter (0.315" vs. 0.394") and different lead spacing (0.138" vs. 0.197"). These require PCB footprint verification and are not direct drop-in replacements.

Compliance Considerations

All substitute parts listed carry ROHS3 compliance except the original UHM1A102MPD. For applications requiring regulatory compliance, any substitute from this list satisfies ROHS3 requirements. The UPA series (UPA1A102MPD3 and UPA1C102MPD) maintain Active product status, indicating ongoing manufacturer support and availability.

Frequently Asked Questions (FAQ)

Q: Can UPA1A102MPD3 directly replace UHM1A102MPD without PCB modification?

A: Yes. Both parts share identical lead spacing (0.197" / 5.00 mm), case diameter (0.394" / 10.00 mm), and height (0.689" / 17.50 mm). The UPA1A102MPD3 is a direct mechanical replacement. However, the impedance difference (49 mOhms vs. 18 mOhms) may affect ripple current performance in high-frequency applications.

Q: What is the advantage of selecting a 16 V rated capacitor instead of 10 V?

A: A 16 V rated capacitor (such as UPA1C102MPD or UHV1C102MPD) provides voltage margin above the circuit requirement of 10 V. This margin improves reliability and extends capacitor lifetime under transient overvoltage conditions. The trade-off is slightly larger physical dimensions in some series.

Q: Are parts marked "Not For New Designs" still suitable for replacement?

A: Parts with "Not For New Designs" status remain electrically and mechanically compatible for replacement in existing designs. However, for new product development, Active status parts such as UPA1A102MPD3 or UPA1C102MPD are preferred due to guaranteed long-term availability and manufacturer support.

Q: Does the UHD1A102MPD series require PCB redesign?

A: UHD1A102MPD (3000-hour variant) and UHE1A102MPD (6000-hour variant) feature different physical dimensions: lead spacing of 0.138" (4.60 mm) and case diameter of 0.315" (8.00 mm) compared to the original 0.197" and 0.394". These require PCB footprint verification. UHD1A102MPD6 maintains the original lead spacing and case diameter, requiring only height clearance verification.

Q: What does impedance (ESR) variation mean for circuit performance?

A: Impedance affects ripple current handling and voltage ripple at the capacitor terminals. The original UHM1A102MPD has 18 mOhms impedance. Substitutes with higher impedance (such as UPA series at 49 mOhms) may produce greater voltage ripple under high-frequency switching conditions. For applications with strict ripple voltage limits, impedance matching is critical.

Q: Is ROHS3 compliance mandatory for this substitution?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. All substitute parts listed carry ROHS3 compliance. The original UHM1A102MPD does not specify ROHS status, making ROHS3-compliant substitutes necessary for regulatory compliance in restricted markets.

Q: Can I use UKA series parts as substitutes?

A: UKA1A102MPD and UKA1C102MPD are mechanically compatible (identical lead spacing, case diameter, and height). However, both carry "Not For New Designs" status. The UKA series is optimized for audio applications with specified ripple current ratings at 120 Hz and 10 kHz. For general-purpose applications, UPA series parts are preferred.

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