UST1C100MDD Equivalent & Substitute Parts

Part Overview

The UST1C100MDD is a 10 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, though 1158 pieces remain in stock as new original inventory. The part operates across a temperature range of -55°C to 105°C with a rated lifetime of 1000 hours at 105°C, making it suitable for general-purpose applications requiring stable capacitance in through-hole configurations.

Due to the obsolete product status, identifying equivalent and substitute parts is essential for design continuity, production planning, and long-term component availability. Active alternatives from Nichicon, Panasonic Electronic Components, and Chemi-Con provide direct functional equivalence while maintaining compliance with current manufacturing standards.

Key Parameters

Parameter	Value
Capacitance	10 µF
Voltage - Rated	16 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UST1C100MDD is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 10 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Operating Temperature: -55°C ~ 105°C (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Secondary Compatibility Parameters:

Lifetime @ 105°C: 1000 hours minimum
RoHS3 Compliance: Required
Lead Spacing: Varies by substitute (design-dependent)
Physical Dimensions: Varies by substitute (board layout-dependent)

All substitute parts listed maintain identical electrical specifications and through-hole mounting compatibility. Variations in lead spacing and physical dimensions must be verified against specific PCB design requirements before implementation.

Parameter Comparison

Parameter	UST1C100MDD (Nichicon)	EEA-GA1C100 (Panasonic)	EEA-GA1C100B (Panasonic)	EEA-GA1C100H (Panasonic)	EKMG160ELL100ME11D (Chemi-Con)	RNS1E100MDS1 (Nichicon)	UWT1C100MCL1GB (Nichicon)
Capacitance	10 µF	10 µF	10 µF	10 µF	10 µF	10 µF	10 µF
Voltage - Rated	16 V	16 V	16 V	16 V	16 V	25 V	16 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	1000 Hrs	1000 Hrs	1000 Hrs	1000 Hrs	1000 Hrs	2000 Hrs	1000 Hrs
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar	Polar	Polar
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can - SMD
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Lead Spacing	0.059" (1.50mm)	0.059" (1.50mm)	0.197" (5.00mm)	0.098" (2.50mm)	0.079" (2.00mm)	0.098" (2.50mm)	N/A (SMD)
Size / Dimension	0.157" Dia (4.00mm)	0.157" Dia (4.00mm)	0.157" Dia (4.00mm)	0.157" Dia (4.00mm)	0.197" Dia (5.00mm)	0.248" Dia (6.30mm)	0.157" Dia (4.00mm)
Height - Seated (Max)	0.315" (8.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.492" (12.50mm)	0.315" (8.00mm)	0.213" (5.40mm)

Engineering Selection Recommendations

Direct Through-Hole Equivalents (Recommended for Pin-Compatible Replacement):

EEA-GA1C100, EEA-GA1C100B, and EEA-GA1C100H (Panasonic Electronic Components, GA-A series) are active-status direct equivalents with identical electrical specifications to the UST1C100MDD. All three maintain 10 µF capacitance, 16 V rating, ±20% tolerance, and 1000-hour lifetime at 105°C. These parts differ only in lead spacing (1.50mm, 5.00mm, and 2.50mm respectively), requiring verification against PCB pad layout. Panasonic parts offer high inventory availability (9,401 to 38,080 units) and full ROHS3 compliance.

EKMG160ELL100ME11D (Chemi-Con, KMG series) provides electrical equivalence with identical specifications. This part features a larger 5.00mm diameter and 12.50mm height, requiring PCB layout verification. Inventory availability is 1,369 units.

Enhanced Performance Alternative:

RNS1E100MDS1 (Nichicon, RNS series) is an aluminum-polymer capacitor offering superior performance characteristics while maintaining electrical compatibility. This part provides 25 V rating (exceeds 16 V requirement), 2000-hour lifetime at 105°C (doubles the 1000-hour specification), and significantly lower ESR (63 mOhm). The larger 6.30mm diameter and 2.50mm lead spacing require PCB design verification. This part is active-status with 3,103 units in inventory and is suitable for applications requiring extended operational life or improved ripple current handling.

Surface-Mount Alternative:

UWT1C100MCL1GB (Nichicon, UWT series) is a surface-mount variant with identical electrical specifications. This part is not a direct through-hole replacement due to SMD mounting type but is listed as an active-status alternative for designs transitioning to surface-mount assembly. It features reduced height (5.40mm) and is available in high volume (10,100 units).

Selection Criteria:

For direct pin-compatible replacement: Select EEA-GA1C100, EEA-GA1C100B, or EEA-GA1C100H based on required lead spacing
For extended lifetime applications: Select RNS1E100MDS1
For surface-mount designs: Select UWT1C100MCL1GB
All recommended parts maintain ROHS3 compliance and are active-status products

Frequently Asked Questions (FAQ)

Q: Can EEA-GA1C100 directly replace UST1C100MDD without PCB modification?

A: EEA-GA1C100 maintains identical electrical specifications and through-hole mounting. However, lead spacing differs (1.50mm for both parts, matching the original). Physical height is slightly reduced (7.00mm vs. 8.00mm), which does not affect electrical function. Verify PCB pad layout compatibility before implementation.

Q: What is the difference between EEA-GA1C100, EEA-GA1C100B, and EEA-GA1C100H?

A: All three Panasonic parts are electrically identical (10 µF, 16 V, ±20%, 1000 Hrs @ 105°C). The differences are lead spacing: EEA-GA1C100 uses 1.50mm, EEA-GA1C100B uses 5.00mm, and EEA-GA1C100H uses 2.50mm. Selection depends on PCB pad spacing requirements.

Q: Why is RNS1E100MDS1 rated for 25 V instead of 16 V?

A: RNS1E100MDS1 is an aluminum-polymer capacitor with enhanced specifications. The 25 V rating exceeds the 16 V requirement, providing additional safety margin. This part is electrically compatible for 16 V applications and offers improved performance (2000-hour lifetime, 63 mOhm ESR) compared to the original 1000-hour aluminum electrolytic design.

Q: Can RNS1E100MDS1 be used in the same PCB footprint as UST1C100MDD?

A: RNS1E100MDS1 has a larger diameter (6.30mm vs. 4.00mm) and different lead spacing (2.50mm vs. 1.50mm). PCB layout verification is required. Physical dimensions must be confirmed against available board space before substitution.

Q: Is UWT1C100MCL1GB suitable for through-hole applications?

A: No. UWT1C100MCL1GB is a surface-mount device (SMD) and cannot be used in through-hole applications. It is listed as an alternative for designs transitioning to surface-mount assembly only.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (EEA-GA1C100 series, EKMG160ELL100ME11D, RNS1E100MDS1, and UWT1C100MCL1GB) are ROHS3 compliant and meet current environmental regulations.

Q: What is the inventory status of substitute parts?

A: EEA-GA1C100 (38,080 units), EEA-GA1C100B (9,401 units), EEA-GA1C100H (10,632 units), EKMG160ELL100ME11D (1,369 units), RNS1E100MDS1 (3,103 units), and UWT1C100MCL1GB (10,100 units) are all available as new original stock. The original UST1C100MDD has 1,158 units remaining.

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

A: RNS1E100MDS1 provides the longest operational lifetime (2000 hours at 105°C vs. 1000 hours for other parts) and lowest ESR (63 mOhm), making it suitable for applications requiring extended service life or high ripple current handling.

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