50MS71MEFC4X7 Equivalent & Substitute Parts

Part Overview

The 50MS71MEFC4X7 is a 1 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Rubycon. This component is rated for 1000 hours at 85°C and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Capacitance	1 µF
Voltage Rating	50 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.059" (1.50 mm)
Size / Dimension	0.157" Dia (4.00 mm)
Height - Seated (Max)	0.315" (8.00 mm)
Operating Temperature Range	-40°C ~ 85°C
Lifetime @ Temperature	1000 Hrs @ 85°C
Polarization	Polar
Application	General Purpose

Substitute Part Grouping Explanation

Substitution for the 50MS71MEFC4X7 is determined by strict equivalence across the following parameters:

Capacitance: 1 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.059" (1.50 mm) (exact match required)
Physical Dimensions: 0.157" Dia (4.00 mm), Height 0.315" (8.00 mm) (exact match required)
Polarization: Polar (exact match required)

Two substitute parts meet these criteria:

50MH71MEFC4X7 (Rubycon, Direct Manufacturer Substitute): Same manufacturer, identical electrical and mechanical specifications with extended operating temperature range (-40°C ~ 105°C) and improved lifetime rating (1000 Hrs @ 105°C).
105RSS050M (Cornell Dubilier / Illinois Capacitor, Parametric Equivalent): Alternative manufacturer providing identical capacitance, voltage, tolerance, package, and physical dimensions. Active product status with full compliance certifications.

Parameter Comparison

Parameter	50MS71MEFC4X7	50MH71MEFC4X7	105RSS050M
Manufacturer	Rubycon	Rubycon	Cornell Dubilier / Illinois Capacitor
Capacitance	1 µF	1 µF	1 µF
Voltage Rating	50 V	50 V	50 V
Tolerance	±20%	±20%	±20%
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
Lifetime @ Temperature	1000 Hrs @ 85°C	1000 Hrs @ 105°C	1000 Hrs @ 85°C
Lead Spacing	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)
Size / Dimension	0.157" Dia (4.00 mm)	0.157" Dia (4.00 mm)	0.157" Dia (4.00 mm)
Height - Seated (Max)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)
Package / Case	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

50MH71MEFC4X7 is the direct manufacturer substitute from Rubycon. It provides identical electrical and mechanical compatibility with the original 50MS71MEFC4X7 while offering an extended operating temperature range and improved thermal lifetime rating. Both parts carry ROHS3 compliance and REACH unaffected status. Selection of this substitute is appropriate for applications requiring manufacturer continuity and proven design compatibility.

105RSS050M is an active product from Cornell Dubilier / Illinois Capacitor that meets all electrical and mechanical substitution criteria. This part maintains ROHS3 compliance and REACH unaffected status. The active product status ensures long-term availability and supply chain stability. Selection of this substitute is appropriate for new designs or applications where extended component lifecycle is required.

Frequently Asked Questions (FAQ)

Q: Can 50MH71MEFC4X7 be used as a direct replacement for 50MS71MEFC4X7?

A: Yes. Both parts are manufactured by Rubycon and share identical capacitance (1 µF), voltage rating (50 V), tolerance (±20%), package type (radial, can), physical dimensions, and lead spacing. The 50MH71MEFC4X7 offers extended operating temperature range and improved thermal lifetime, making it a compatible upgrade.

Q: Is 105RSS050M compatible with the original 50MS71MEFC4X7?

A: Yes. The 105RSS050M matches all critical electrical parameters (1 µF, 50 V, ±20% tolerance) and physical specifications (radial can package, 0.059" lead spacing, 0.157" diameter, 0.315" height). It is manufactured by Cornell Dubilier / Illinois Capacitor and maintains full compliance certifications.

Q: What is the difference between the three parts?

A: All three parts are electrically and mechanically equivalent. The primary differences are manufacturer (Rubycon vs. Cornell Dubilier / Illinois Capacitor) and product status. The 50MH71MEFC4X7 offers extended temperature range (-40°C ~ 105°C vs. -40°C ~ 85°C). The 105RSS050M is an active product, ensuring continued availability.

Q: Are there any ripple current differences between these parts?

A: Ripple current specifications vary slightly. The 50MS71MEFC4X7 is rated at 12 mA @ 120 Hz and 18 mA @ 10 kHz. The 50MH71MEFC4X7 is rated at 10 mA @ 120 Hz and 15 mA @ 10 kHz. The 105RSS050M is rated at 10 mA @ 120 Hz and 14 mA @ 100 kHz. These variations are within acceptable ranges for general purpose applications.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. All three parts share identical lead spacing (0.059" / 1.50 mm) and physical dimensions (0.157" diameter, 0.315" height), ensuring direct PCB footprint compatibility without layout modifications.

Q: Which substitute should I choose for new production?

A: The 105RSS050M is recommended for new production due to its active product status, which ensures long-term supply chain availability and support. For existing designs requiring manufacturer continuity, the 50MH71MEFC4X7 is the appropriate choice.

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