108RZM050M Equivalent & Substitute Parts

Part Overview

The 108RZM050M is a 1000 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component operates across a temperature range of -55°C to 105°C with a rated lifetime of 3000 hours at 105°C. The part is classified as Active product status and is RoHS3 compliant.

Substitute parts are necessary when the original 108RZM050M becomes unavailable, when extended operational lifetime is required, when higher temperature ratings are needed, or when improved electrical characteristics such as lower equivalent series resistance (ESR) are beneficial for specific applications.

Key Parameters

Parameter	Value	Unit
Capacitance	1000	µF
Tolerance	±20%	-
Voltage - Rated	50	V
ESR @ 120Hz	199	mOhm
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-55 to 105	°C
Lead Spacing	0.295 (7.50)	" (mm)
Size / Dimension	0.630 Dia (16.00)	" (mm)
Height - Seated (Max)	1.063 (27.00)	" (mm)
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 108RZM050M is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Capacitance: 1000 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.295" (7.50mm) (exact match required)
Size / Dimension: 0.630" Dia (16.00mm) (exact match required)

Performance Enhancement Parameters (allow variation):

ESR @ 120Hz: Lower values indicate improved performance
Lifetime @ Temperature: Extended hours indicate improved reliability
Operating Temperature Range: Extended upper limit indicates broader applicability
Impedance: Lower values indicate improved high-frequency performance

Substitute parts are grouped into three categories:

Upgrade Parts: Offer improved electrical characteristics (lower ESR, extended lifetime, or higher temperature ratings) while maintaining identical mechanical and electrical specifications.

Similar Parts: Maintain all mandatory equivalence parameters with minor variations in height or operating temperature range that do not affect circuit compatibility.

Parametric Equivalent Parts: Match all mandatory parameters but are designated as Not For New Designs or have been superseded by improved alternatives.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120Hz (mOhm)	Lifetime @ Temp (Hrs)	Operating Temp (°C)	Impedance (mOhms)	Height Max (mm)	Product Status	Ratings
108RZM050M	Cornell Dubilier / Illinois Capacitor	1000	50	±20%	199	3000 @ 105°C	-55 to 105	180	27.00	Active	-
108KXM050M	Cornell Dubilier / Illinois Capacitor	1000	50	±20%	165.8	5000 @ 105°C	-55 to 105	-	27.00	Active	-
ELXZ500ELL102ML25S	Chemi-Con	1000	50	±20%	-	8000 @ 105°C	-55 to 105	34	26.50	Active	AEC-Q200
MAL214691105E3	Vishay Beyschlag/Draloric/BC Components	1000	50	±20%	-	5000 @ 125°C	-55 to 125	31	27.00	Active	AEC-Q200
MAL215051102E3	Vishay Beyschlag/Draloric/BC Components	1000	50	±20%	-	10000 @ 105°C	-55 to 105	34	27.00	Active	AEC-Q200
MAL215061102E3	Vishay Beyschlag/Draloric/BC Components	1000	50	±20%	-	10000 @ 105°C	-55 to 105	34	27.00	Active	AEC-Q200
EEU-FC1H102	Panasonic Electronic Components	1000	50	±20%	-	5000 @ 105°C	-55 to 105	34	25.00	Active	AEC-Q200
EKZE500ELL102ML25S	Chemi-Con	1000	50	±20%	-	5000 @ 105°C	-40 to 105	21	26.50	Active	-
UPS1H102MHD	Nichicon	1000	50	±20%	-	3000 @ 105°C	-55 to 105	58	27.00	Not For New Designs	-

Engineering Selection Recommendations

For Active Product Status Applications:

The 108KXM050M from Cornell Dubilier / Illinois Capacitor is the direct upgrade path. It maintains identical mechanical specifications and operating temperature range while reducing ESR from 199 mOhm to 165.8 mOhm and extending lifetime from 3000 hours to 5000 hours at 105°C. Both parts are Active status and RoHS3 compliant.

For Automotive Applications with Extended Temperature Rating:

The MAL214691105E3 from Vishay Beyschlag/Draloric/BC Components extends the upper operating temperature to 125°C while maintaining 5000-hour lifetime at 125°C. This part carries AEC-Q200 automotive qualification and is suitable for applications requiring higher temperature performance.

For Maximum Lifetime Requirements:

The MAL215051102E3 and MAL215061102E3 from Vishay Beyschlag/Draloric/BC Components both provide 10000-hour lifetime at 105°C with AEC-Q200 automotive qualification. These parts are identical in electrical and mechanical specifications and represent the longest-life option in this substitution group.

For Lowest Impedance Performance:

The EKZE500ELL102ML25S from Chemi-Con offers the lowest impedance at 21 mOhms, providing superior high-frequency performance. This part maintains 5000-hour lifetime at 105°C and is suitable for general-purpose applications requiring minimal impedance.

For Automotive-Qualified General Purpose Applications:

The EEU-FC1H102 from Panasonic Electronic Components provides AEC-Q200 qualification with 5000-hour lifetime at 105°C. The height is reduced to 25.00mm compared to the original 27.00mm, which may be advantageous in space-constrained designs.

Parts Not Recommended for New Designs:

The UPS1H102MHD from Nichicon is designated as Not For New Designs and should be used only for legacy system maintenance or repair applications where original part compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can the 108KXM050M directly replace the 108RZM050M in existing designs?

A: Yes. The 108KXM050M maintains identical mechanical dimensions (lead spacing, diameter, height), electrical ratings (1000 µF, 50 V, ±20% tolerance), and operating temperature range (-55°C to 105°C). The improved ESR and extended lifetime provide enhanced performance without requiring circuit modifications.

Q: What is the primary difference between upgrade parts and similar parts?

A: Upgrade parts offer improved electrical characteristics such as lower ESR, extended lifetime, or higher temperature ratings while maintaining identical mechanical specifications. Similar parts maintain all mandatory electrical and mechanical specifications but may have minor variations in height or operating temperature range that do not affect circuit compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the original 108RZM050M.

Q: Which substitute part should be selected for automotive applications?

A: For automotive applications, select parts with AEC-Q200 qualification: MAL214691105E3, MAL215051102E3, MAL215061102E3, or EEU-FC1H102. These parts meet automotive reliability standards and are suitable for automotive circuit designs.

Q: Does the height variation between substitute parts affect circuit compatibility?

A: Height variations within the range of 25.00mm to 27.00mm do not affect electrical circuit compatibility. However, mechanical clearance in the PCB layout should be verified. The original 108RZM050M has a maximum seated height of 27.00mm; substitute parts with reduced height (such as EEU-FC1H102 at 25.00mm) provide additional clearance.

Q: What does "Not For New Designs" mean for the UPS1H102MHD?

A: This designation indicates the part is obsolete or superseded. The UPS1H102MHD should be used only for maintenance, repair, or replacement of existing systems where original part compatibility is required. New circuit designs should select from Active status alternatives.

Q: How does ESR affect capacitor performance?

A: Equivalent Series Resistance (ESR) determines the capacitor's ability to handle ripple current and affects voltage ripple across the capacitor. Lower ESR values (such as 165.8 mOhm in the 108KXM050M versus 199 mOhm in the original) result in reduced heat generation and improved performance in high-ripple-current applications.

Q: Can substitute parts with different impedance values be used interchangeably?

A: Yes, provided the application does not have specific impedance requirements. Impedance values range from 21 mOhms (EKZE500ELL102ML25S) to 180 mOhms (108RZM050M). Lower impedance values are beneficial for high-frequency filtering applications. Verify application requirements before selection.

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

A: Lifetime ratings specify the expected operational duration at a given temperature. The 108RZM050M is rated for 3000 hours at 105°C. Substitute parts with extended lifetimes (such as 5000 or 10000 hours) provide longer service life in continuous operation. The MAL214691105E3 specifies 5000 hours at the higher temperature of 125°C, indicating superior thermal performance.

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