SMG50VB47RM6X11LL Equivalent & Substitute Parts

Part Overview

The SMG50VB47RM6X11LL is a 47 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Chemi-Con. This component is classified as obsolete, indicating discontinued production. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Locating equivalent and substitute parts is necessary due to the obsolete status of the SMG50VB47RM6X11LL. Active production alternatives with identical or superior electrical and mechanical characteristics are available from multiple manufacturers, ensuring design continuity and supply chain reliability.

Key Parameters

Parameter	Value	Unit
Capacitance	47	µF
Voltage - Rated	50	V
Tolerance	±20%	-
ESR @ 120 Hz	14.918	Ohm
Lifetime @ Temperature	2000	Hrs @ 85°C
Operating Temperature Range	-40 to 85	°C
Ripple Current @ 120 Hz	155	mA
Ripple Current @ 100 kHz	279	mA
Lead Spacing	0.098 (2.50)	" (mm)
Diameter	0.248 (6.30)	" (mm)
Height - Seated (Max)	0.433 (11.00)	" (mm)
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Polarization	Polar	-
RoHS Status	RoHS non-compliant	-

Substitute Part Grouping Explanation

Substitution of the SMG50VB47RM6X11LL is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 47 µF
Voltage Rating: 50 V minimum
Tolerance: ±20%
Polarization: Polar
Mounting Type: Through Hole
Lead Spacing: 0.098" (2.50 mm)
Diameter: 0.248" (6.30 mm)
Package: Radial, Can

Performance Parameters (Equivalent or Superior):

Lifetime @ Temperature: 2000 hours minimum at rated temperature
Operating Temperature Range: -40°C to 85°C minimum
Ripple Current Capability: 155 mA @ 120 Hz minimum

Substitute parts are grouped into three categories:

Direct Equivalents (50 V Rating): Parts meeting all critical parameters with identical voltage rating and comparable performance characteristics.

Similar Alternatives (50 V Rating, Active Status): Parts with identical electrical specifications but different manufacturers or slightly modified mechanical dimensions, offering improved availability and compliance status.

Upgrade Options (Higher Voltage or Enhanced Lifetime): Parts with 63 V rating or extended lifetime ratings that provide superior performance margins while maintaining mechanical compatibility and electrical equivalence at the 50 V operating point.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ Temp	Operating Temp (°C)	ESR @ 120 Hz (Ohm)	Ripple Current @ 120 Hz (mA)	Height (mm)	Product Status	RoHS Status
SMG50VB47RM6X11LL	Chemi-Con	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	14.918	155	11.00	Obsolete	Non-compliant
ESMG500ELL470MF11D	Chemi-Con	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	-	155	12.50	Active	ROHS3 Compliant
476SAK050M	Cornell Dubilier / Illinois Capacitor	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	4.233	140	10.50	Active	ROHS3 Compliant
UFW1H470MED	Nichicon	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	-	150	11.00	Obsolete	ROHS3 Compliant
UKW1H470MED	Nichicon	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	-	150	11.00	Obsolete	ROHS3 Compliant
EEU-EB1H470S	Panasonic Electronic Components	47	50	±20%	5000 Hrs @ 105°C	-40 to 105	-	61	12.20	Active	ROHS3 Compliant
UFW1J470MED	Nichicon	47	63	±20%	2000 Hrs @ 85°C	-40 to 85	-	165	11.00	Obsolete	ROHS3 Compliant
UKW1J470MED	Nichicon	47	63	±20%	2000 Hrs @ 85°C	-40 to 85	-	165	11.00	Obsolete	ROHS3 Compliant
UPW1H470MED	Nichicon	47	50	±20%	2000 Hrs @ 105°C	-55 to 105	-	90	11.00	Obsolete	ROHS3 Compliant
ECA-1HM470	Panasonic Electronic Components	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	-	130	12.20	Active	ROHS3 Compliant
SK470M050ST	Cornell Dubilier Electronics (CDE)	47	50	±20%	2000 Hrs @ 85°C	-40 to 85	2.82	-	13.00	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Active Production, RoHS3 Compliant:

ESMG500ELL470MF11D (Chemi-Con) is the preferred direct substitute. This part maintains manufacturer continuity with the original SMG50VB47RM6X11LL while offering active production status and ROHS3 compliance. Electrical specifications are identical, with height increased by 1.50 mm (12.50 mm vs. 11.00 mm). This dimension change is acceptable for through-hole applications with standard PCB layout tolerances.

Alternative - Active Production, Superior ESR Performance:

476SAK050M (Cornell Dubilier / Illinois Capacitor) provides the lowest ESR at 4.233 Ohm @ 120 Hz, compared to the original 14.918 Ohm. This represents a 71.7% reduction in equivalent series resistance, delivering superior high-frequency performance and reduced thermal dissipation. Height is 10.50 mm, providing a more compact profile. Product status is active with ROHS3 compliance.

Alternative - Active Production, Extended Lifetime:

EEU-EB1H470S (Panasonic Electronic Components) offers extended lifetime of 5000 hours at 105°C, compared to 2000 hours at 85°C for the original part. Operating temperature range extends to 105°C. This part is suitable for applications requiring enhanced reliability margins. Height is 12.20 mm. Product status is active with ROHS3 compliance.

Alternative - Active Production, Standard Performance:

ECA-1HM470 (Panasonic Electronic Components) provides equivalent electrical performance with active production status and ROHS3 compliance. Ripple current capability is 130 mA @ 120 Hz. Height is 12.20 mm. This part offers broad availability and established supply chain presence.

Upgrade Option - Higher Voltage Rating:

UFW1J470MED or UKW1J470MED (Nichicon) provide 63 V rating with identical 47 µF capacitance. These parts deliver a 26% voltage safety margin over the 50 V requirement. Both parts are obsolete but available in inventory. Height matches the original at 11.00 mm. Ripple current capability increases to 165 mA @ 120 Hz.

Not Recommended:

UFW1H470MED and UKW1H470MED (Nichicon) are obsolete with no active production alternative from the same manufacturer. While electrically equivalent, these parts offer no supply chain advantage over active alternatives.

UPW1H470MED (Nichicon) is obsolete. Although it offers extended temperature range (-55°C to 105°C) and extended lifetime (2000 Hrs @ 105°C), the obsolete status and limited inventory make it unsuitable for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use a 63 V rated capacitor in place of a 50 V rated capacitor?

A: Yes. A 63 V rated capacitor operates safely at 50 V. The higher voltage rating provides a safety margin and does not affect circuit operation. UFW1J470MED and UKW1J470MED are 63 V alternatives with identical 47 µF capacitance and compatible mechanical dimensions.

Q: What is the significance of ESR (Equivalent Series Resistance)?

A: ESR determines the capacitor's ability to handle ripple current and dissipate heat. Lower ESR values indicate superior high-frequency performance and reduced thermal stress. 476SAK050M provides ESR of 4.233 Ohm, significantly lower than the original 14.918 Ohm, resulting in improved performance in switching applications.

Q: Are there mechanical compatibility concerns with substitute parts?

A: All substitute parts maintain identical lead spacing (0.098" / 2.50 mm) and diameter (0.248" / 6.30 mm). Height variations range from 10.50 mm to 13.00 mm compared to the original 11.00 mm. These variations are within standard PCB layout tolerances for through-hole components. Verify clearance in your specific application if height-constrained.

Q: What does RoHS3 compliance mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original SMG50VB47RM6X11LL is RoHS non-compliant. All active production alternatives listed are ROHS3 compliant, suitable for applications requiring environmental compliance.

Q: Why is the original part obsolete?

A: Chemi-Con has discontinued the SMG series in favor of the ESMG series, which offers improved compliance and manufacturing efficiency. ESMG500ELL470MF11D is the direct successor with identical electrical specifications.

Q: Can I substitute an obsolete part with another obsolete part?

A: Substituting one obsolete part with another obsolete part does not resolve supply chain risk. Active production alternatives are strongly preferred. UFW1H470MED, UKW1H470MED, UFW1J470MED, UKW1J470MED, and UPW1H470MED are all obsolete and should not be selected for new designs despite available inventory.

Q: What is the difference between ripple current at 120 Hz and 100 kHz?

A: Ripple current ratings vary with frequency. Low-frequency ripple (120 Hz) represents power supply ripple in AC-DC conversion. High-frequency ripple (100 kHz or 10 kHz) represents switching noise in DC-DC converters. The original part supports 155 mA @ 120 Hz and 279 mA @ 100 kHz. Verify your application's ripple frequency and select a substitute with equal or higher ripple current capability at that frequency.

Q: Is packaging type (Bulk vs. other) relevant to electrical performance?

A: Packaging type affects supply chain logistics and minimum order quantities but does not affect electrical performance or mechanical compatibility. All listed substitutes are available in Bulk packaging suitable for production assembly.

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