477RZM025M Equivalent & Substitute Parts

Part Overview

The 477RZM025M is a 470 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 105°C and is rated for 3000 hours at 105°C, serving general-purpose applications requiring through-hole mounting.

Key Parameters

Parameter	477RZM025M Value
Capacitance	470 µF
Voltage Rating	25 V
Tolerance	±20%
ESR @ 120Hz	564 mOhm
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Lead Spacing	0.197" (5.00mm)
Case Diameter	0.394" (10.00mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the 477RZM025M is determined by strict electrical and mechanical compatibility criteria. All substitute parts must maintain the following parameters:

Critical Parameters (Non-Negotiable):

Capacitance: 470 µF
Voltage Rating: 25 V (or higher)
Tolerance: ±20%
Lead Spacing: 0.197" (5.00mm)
Case Diameter: 0.394" (10.00mm)
Mounting Type: Through Hole
Package Type: Radial, Can
Polarization: Polar
Operating Temperature Range: -55°C to 105°C (minimum)

Performance Parameters (Allowable Variation):

ESR @ 120Hz: Substitute values must not exceed the original specification significantly
Lifetime @ Temperature: Substitute values equal to or exceeding 3000 hours at 105°C are acceptable
Impedance: Lower impedance values indicate improved performance

Substitute parts are grouped into two categories: direct equivalents (same voltage rating) and upgrades (higher voltage rating or enhanced performance characteristics).

Parameter Comparison

Parameter	477RZM025M	477KXM025MLQ	B41821B5477M000	ELXZ250ELL471MJ16S	ELZA350ELL471MJ16S	MAL215056471E3	MAL215066471E3
Manufacturer	Cornell Dubilier	Cornell Dubilier	EPCOS - TDK	Chemi-Con	Chemi-Con	Vishay	Vishay
Series	RZM	KXM	B41821	LXZ	LZA	150 RMI	150 RMI
Capacitance	470 µF	470 µF	470 µF	470 µF	470 µF	470 µF	470 µF
Voltage Rating	25 V	25 V	25 V	25 V	35 V	25 V	25 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
ESR @ 120Hz	564 mOhm	493.8 mOhm	560 mOhm	Not Specified	Not Specified	Not Specified	Not Specified
Lifetime @ 105°C	3000 Hrs	4000 Hrs	Not Applicable	5000 Hrs	4000 Hrs	6000 Hrs	6000 Hrs
Lifetime @ 85°C	Not Specified	Not Specified	2000 Hrs	Not Specified	Not Specified	Not Specified	Not Specified
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 85°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Lead Spacing	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)
Case Diameter	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Height - Seated (Max)	0.709" (18.00mm)	0.689" (17.50mm)	0.531" (13.50mm)	0.689" (17.50mm)	0.689" (17.50mm)	0.689" (17.50mm)	0.689" (17.50mm)
Impedance	273 mOhms	221 mOhms	Not Specified	68 mOhms	49 mOhms	66 mOhms	66 mOhms
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q200 Rating	Not Specified	Not Specified	Not Specified	Yes	Yes	Yes	Yes

Engineering Selection Recommendations

Direct Equivalents (25 V Rating):

The 477KXM025MLQ, B41821B5477M000, ELXZ250ELL471MJ16S, MAL215056471E3, and MAL215066471E3 are direct electrical equivalents to the 477RZM025M, maintaining the 25 V voltage rating and 470 µF capacitance specification.

477KXM025MLQ (Cornell Dubilier, Active): This same-manufacturer upgrade offers improved performance with 4000-hour lifetime at 105°C (versus 3000 hours) and lower ESR at 493.8 mOhm. The part is ROHS3 compliant and maintains identical mechanical dimensions and lead spacing. Height is reduced to 0.689" (17.50mm) from the original 0.709" (18.00mm), providing a more compact footprint while maintaining full electrical compatibility.

B41821B5477M000 (EPCOS - TDK, Active): This substitute maintains electrical equivalence with 560 mOhm ESR at 120Hz. The operating temperature range is limited to -40°C to 85°C, and lifetime is specified as 2000 hours at 85°C rather than 105°C. Height is significantly reduced to 0.531" (13.50mm), offering space savings in applications where the lower temperature range is acceptable. ROHS3 compliant.

ELXZ250ELL471MJ16S (Chemi-Con, Active): This automotive-grade substitute (AEC-Q200 rated) provides superior performance with 5000-hour lifetime at 105°C. Impedance is substantially lower at 68 mOhms, indicating reduced ripple current effects. Operating temperature range matches the original at -55°C to 105°C. Height is 0.689" (17.50mm). ROHS3 compliant.

MAL215056471E3 (Vishay, Active): This automotive-grade substitute (AEC-Q200 rated) offers the highest lifetime specification at 6000 hours at 105°C. Impedance is 66 mOhms. Operating temperature range is -55°C to 105°C. Height is 0.689" (17.50mm). ROHS3 compliant.

MAL215066471E3 (Vishay, Active): Functionally identical to MAL215056471E3 with 6000-hour lifetime at 105°C and 66 mOhm impedance. Operating temperature range is -55°C to 105°C. Height is 0.689" (17.50mm). ROHS3 compliant.

Upgrade Option (35 V Rating):

ELZA350ELL471MJ16S (Chemi-Con, Active): This automotive-grade substitute (AEC-Q200 rated) provides higher voltage rating at 35 V, offering increased design margin for applications subject to voltage transients. Lifetime is 4000 hours at 105°C. Impedance is 49 mOhms, the lowest among all substitutes. Operating temperature range is -55°C to 105°C. Height is 0.689" (17.50mm). ROHS3 compliant. This part is suitable for applications where the original 25 V rating may be marginal.

Selection Criteria:

For direct replacement with improved reliability: 477KXM025MLQ or MAL215056471E3
For space-constrained applications: B41821B5477M000 (with temperature range verification)
For automotive applications: ELXZ250ELL471MJ16S, ELZA350ELL471MJ16S, MAL215056471E3, or MAL215066471E3
For maximum voltage margin: ELZA350ELL471MJ16S

All active substitutes are ROHS3 compliant and suitable for modern production environments.

Frequently Asked Questions (FAQ)

Q: Can the 477RZM025M be directly replaced with any of the listed substitutes?

A: Yes, all listed substitutes maintain the critical electrical parameters: 470 µF capacitance, ±20% tolerance, through-hole radial can package, and 0.197" (5.00mm) lead spacing. Direct replacement is mechanically and electrically feasible for all parts listed.

Q: What is the primary reason for finding substitutes for the 477RZM025M?

A: The 477RZM025M is classified as obsolete. All listed substitutes are active products with current manufacturing support and availability.

Q: Are there height differences between the 477RZM025M and its substitutes?

A: Yes. The original part has a maximum seated height of 0.709" (18.00mm). Most substitutes are 0.689" (17.50mm), except B41821B5477M000 at 0.531" (13.50mm). Verify PCB layout clearance before selection.

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

A: MAL215056471E3 and MAL215066471E3 offer the highest lifetime rating at 6000 hours at 105°C. ELXZ250ELL471MJ16S provides 5000 hours at 105°C. Both are automotive-grade (AEC-Q200 rated).

Q: Can I use the 35 V rated ELZA350ELL471MJ16S in place of the 25 V 477RZM025M?

A: Yes. The higher voltage rating (35 V) is electrically compatible with 25 V applications and provides additional design margin. All other electrical and mechanical parameters are equivalent.

Q: What does ROHS3 compliance mean for these substitutes?

A: ROHS3 compliance indicates the parts meet Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is required for modern production and environmental compliance.

Q: Are the automotive-grade substitutes (AEC-Q200) suitable for non-automotive applications?

A: Yes. AEC-Q200 rating indicates enhanced reliability testing and qualification. These parts are suitable for any application and offer superior performance characteristics compared to non-automotive-rated alternatives.

Q: What is the difference between ESR and impedance specifications?

A: ESR (Equivalent Series Resistance) is measured at a specific frequency (120Hz in this case). Impedance is the total opposition to current flow and varies with frequency. Lower impedance values indicate better high-frequency performance and reduced ripple current effects.

Q: Which substitute has the lowest impedance?

A: ELZA350ELL471MJ16S has the lowest impedance at 49 mOhms, followed by MAL215056471E3 and MAL215066471E3 at 66 mOhms each.

Q: Is the B41821B5477M000 suitable for all applications requiring the 477RZM025M?

A: The B41821B5477M000 has a reduced operating temperature range (-40°C to 85°C) compared to the original (-55°C to 105°C). Verify that your application does not require operation below -40°C or above 85°C before selection.

Q: Can I mix different substitute parts in the same design?

A: Yes, all substitutes are electrically and mechanically compatible. However, for consistency and supply chain management, using a single substitute part number across a production run is recommended.

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