UML1C330MDD Equivalent & Substitute Parts

Part Overview

The UML1C330MDD is a 33 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon (ML series). This component is rated for 1000 hours at 85°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements demand enhanced performance characteristics such as extended lifetime or higher voltage ratings, or when alternative manufacturers' components meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.098" (2.50mm)
Diameter	0.248" (6.30mm)
Height (Seated Max)	0.236" (6.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the UML1C330MDD are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 33 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Secondary Compatibility Factors:

Lead spacing and physical dimensions must accommodate the PCB layout
Operating temperature range must meet or exceed -40°C ~ 85°C
RoHS3 compliance required for regulatory alignment

Substitute Categories:

Similar Substitutes (Identical Electrical Specifications): Parts meeting all primary criteria with variations in lifetime rating, ripple current handling, or physical dimensions within acceptable tolerances.

Upgrade Substitutes (Enhanced Performance): Parts with identical capacitance and voltage but higher voltage ratings or extended temperature operating ranges, suitable for designs requiring additional performance margin.

Parametric Equivalents (Identical Specifications): Parts with matching electrical and mechanical specifications from alternative manufacturers, directly interchangeable without design modification.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Lead Spacing	Diameter	Height (Max)	Product Status	RoHS Status
UML1C330MDD	Nichicon	33 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.236" (6.00mm)	Active	ROHS3 Compliant
UVR1C330MDD1TA	Nichicon	33 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.197" (5.00mm)	0.492" (12.50mm)	Obsolete	ROHS3 Compliant
25MH533MEFC6.3X5	Rubycon	33 µF	25 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.256" (6.50mm)	Obsolete	ROHS3 Compliant
ECA-1CM330	Panasonic Electronic Components	33 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.472" (12.00mm)	Active	ROHS3 Compliant
ECE-A1CKA330	Panasonic Electronic Components	33 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.276" (7.00mm)	Active	ROHS3 Compliant
ECE-A1CKA330I	Panasonic Electronic Components	33 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.197" (5.00mm)	0.315" (8.00mm)	Active	ROHS3 Compliant
ECE-A1CKS330	Panasonic Electronic Components	33 µF	16 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.236" (6.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalent: ECE-A1CKS330 (Panasonic Electronic Components) is a direct parametric equivalent to UML1C330MDD. Both parts share identical capacitance, voltage rating, tolerance, operating temperature range, lead spacing, diameter, and height specifications. ECE-A1CKS330 is currently active in production and ROHS3 compliant, making it suitable for direct substitution without PCB layout modification.

Active Production Alternatives with Dimensional Variation: ECA-1CM330 and ECE-A1CKA330 are active Panasonic components meeting all electrical specifications (33 µF, 16 V, ±20%, 1000–2000 Hrs @ 85°C). These parts feature different lead spacing and physical dimensions. ECA-1CM330 offers extended lifetime (2000 Hrs @ 85°C) but requires PCB layout adjustment due to 0.079" lead spacing and larger physical envelope. ECE-A1CKA330 maintains 1000 Hrs @ 85°C lifetime with compact dimensions but also requires lead spacing accommodation.

ECE-A1CKA330I is identical to ECE-A1CKA330 electrically but supplied in Cut Tape packaging and features 0.098" lead spacing, matching the original part's lead pitch while maintaining compact height.

Obsolete Parts with Enhanced Performance: UVR1C330MDD1TA (Nichicon, obsolete) provides doubled lifetime (2000 Hrs @ 85°C) but features significantly larger physical dimensions (0.197" diameter, 0.492" height) and different lead spacing (0.197"), requiring substantial PCB redesign.

25MH533MEFC6.3X5 (Rubycon, obsolete) offers higher voltage rating (25 V) and extended operating temperature (-40°C ~ 105°C) with identical lead spacing and similar physical dimensions to the original part. This upgrade substitute is suitable for designs requiring additional voltage margin or higher temperature operation.

Compliance Status: All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original UML1C330MDD specifications.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1CKS330 replace UML1C330MDD without PCB modification? A: Yes. ECE-A1CKS330 matches all electrical specifications and physical dimensions of UML1C330MDD, including lead spacing (0.098"), diameter (0.248"), and height (0.236"). Direct substitution is possible without PCB layout changes.

Q: What is the difference between ECE-A1CKA330 and ECE-A1CKA330I? A: Both parts are electrically identical (33 µF, 16 V, ±20%, 1000 Hrs @ 85°C). ECE-A1CKA330I is supplied in Cut Tape packaging and features 0.098" lead spacing, matching the original part's lead pitch. ECE-A1CKA330 is supplied in Bulk packaging with 0.079" lead spacing, requiring PCB layout adjustment.

Q: Why is 25MH533MEFC6.3X5 classified as an upgrade substitute? A: 25MH533MEFC6.3X5 maintains 33 µF capacitance and identical lead spacing (0.098") but increases voltage rating to 25 V and extends operating temperature to 105°C. This part is suitable for designs requiring higher voltage margin or operation in elevated temperature environments. The part is obsolete but available in inventory.

Q: Can I use ECA-1CM330 as a direct replacement? A: ECA-1CM330 meets all electrical requirements (33 µF, 16 V, ±20%) and offers extended lifetime (2000 Hrs @ 85°C). However, it features different lead spacing (0.079" vs. 0.098") and larger physical dimensions (0.197" diameter, 0.472" height vs. 0.248" diameter, 0.236" height). PCB layout modification is required.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original UML1C330MDD.

Q: What is the significance of lifetime rating differences? A: Lifetime rating indicates the expected operational duration at specified temperature. UML1C330MDD is rated 1000 Hrs @ 85°C. Substitutes with 2000 Hrs @ 85°C (UVR1C330MDD1TA, ECA-1CM330) provide extended service life under identical thermal conditions. Selection depends on application reliability requirements.

Q: Which substitute offers the best inventory availability? A: ECA-1CM330 (Panasonic) has the highest inventory level at 19,777 pieces. ECE-A1CKS330 (Panasonic) has 3,671 pieces available. Both are active production parts with reliable supply.

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