SLP121M350C1P3 Equivalent & Substitute Parts Reference

Part Overview

The SLP121M350C1P3 is a 120 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is classified as Active product status and is designed for general-purpose applications requiring polarized capacitive energy storage in through-hole mounting configurations. Substitute parts become necessary when addressing supply chain constraints, design voltage margin requirements, or performance optimization within compatible electrical and mechanical parameters.

Substiute Parts

SLP121M350C1P3

Cornell Dubilier Electronics (CDE)In Stock: 848SLP121M350C1P3 Datasheet

Current PartRFQ

450MXG120MEFCSN25X25

RubyconIn Stock: 4245450MXG120MEFCSN25X25 Datasheet

UpgradeRFQ

LGNW6121MELA25

NichiconIn Stock: 975LGNW6121MELA25 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLP121M350C1P3 is determined by strict adherence to the following criteria:

Mandatory Matching Parameters:

• Capacitance: 120 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Physical Dimensions: 25.00 mm diameter, 27.00 mm height seated maximum (exact match required)
• Polarization: Polar (exact match required)
• Operating Temperature Range: -25°C to 105°C minimum (exact match or superior required)
• Lifetime @ 105°C: 3000 Hrs minimum (exact match or superior required)

Allowable Variation Parameters:

• Voltage - Rated: Equal to or greater than 350 V (upgrade acceptable)
• ESR: Provided values only; no specification required for substitutes
• Ripple Current: Provided values only; no specification required for substitutes
• RoHS Status: ROHS3 Compliant (exact match required)

All substitute parts listed meet these criteria and are direct functional equivalents within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

SLP121M350C1P3 (Cornell Dubilier Electronics)

This is the primary reference part with Active product status. Selection is appropriate when the 350 V rating is sufficient for the application and CDE component availability aligns with procurement requirements. The part carries ROHS3 compliance and REACH Unaffected status, meeting environmental regulatory requirements.

450MXG120MEFCSN25X25 (Rubycon MXG Series)

This substitute provides a voltage upgrade to 450 V while maintaining all other electrical and mechanical parameters. The Rubycon MXG series offers increased ripple current capability at 120 Hz (950 mA versus 750 mA) and maintains Active product status with ROHS3 compliance. Selection is appropriate when higher voltage margin is required or when Rubycon component availability is preferred. ESR data is not provided for this substitute.

LGNW6121MELA25 (Nichicon LGN Series)

This substitute provides a voltage upgrade to 420 V while maintaining all other electrical and mechanical parameters. The Nichicon LGN series maintains Active product status with ROHS3 compliance and REACH Unaffected status. Selection is appropriate when Nichicon component availability is preferred or when a moderate voltage upgrade is required. ESR data is not provided for this substitute.

All three parts are suitable for direct substitution within circuits designed for 350 V operation, with the substitute parts offering enhanced voltage ratings for applications requiring additional design margin.

Frequently Asked Questions (FAQ)

Q: Can the 450MXG120MEFCSN25X25 or LGNW6121MELA25 be used as direct replacements for the SLP121M350C1P3?

A: Yes. Both substitute parts match all mandatory parameters including capacitance (120 µF), tolerance (±20%), package type (Radial, Can - Snap-In), mounting method (Through Hole), lead spacing (10.00 mm), physical dimensions (25.00 mm diameter, 27.00 mm height), operating temperature range (-25°C to 105°C), and lifetime rating (3000 Hrs @ 105°C). The substitute parts provide higher voltage ratings (450 V and 420 V respectively) compared to the original 350 V specification.

Q: What is the significance of the voltage upgrade in the substitute parts?

A: The substitute parts maintain the same capacitance and physical form factor while providing higher voltage ratings. This allows their use in circuits originally designed for 350 V operation without modification. The higher voltage rating does not change the electrical behavior in 350 V circuits but provides additional design margin.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts share identical lead spacing (10.00 mm), diameter (25.00 mm), and maximum seated height (27.00 mm). They are mechanically interchangeable in through-hole PCB applications.

Q: Do all parts meet the same environmental compliance standards?

A: All three parts are ROHS3 Compliant. The SLP121M350C1P3 and LGNW6121MELA25 are both REACH Unaffected. The 450MXG120MEFCSN25X25 is also REACH Unaffected. All parts carry ECCN EAR99 and HTSUS 8532.22.0040 classifications.

Q: What is the difference in ripple current ratings between the parts?

A: The SLP121M350C1P3 specifies 750 mA @ 120 Hz and 1.1 A @ 20 kHz. The 450MXG120MEFCSN25X25 specifies 950 mA @ 120 Hz and 1.33 A @ 10 kHz. The LGNW6121MELA25 specifies 810 mA @ 120 Hz and 1.1583 A @ 50 kHz. These values are provided for reference; substitution does not require matching ripple current specifications.

Q: Is ESR (Equivalent Series Resistance) a factor in substitution decisions?

A: The SLP121M350C1P3 specifies ESR of 2.765 Ohm @ 120Hz. The substitute parts do not provide ESR specifications in the available data. ESR is not a mandatory matching parameter for substitution eligibility.

Q: Can these parts be used in applications requiring snap-in mounting?

A: Yes. All three parts are specified as Radial, Can - Snap-In package type and are designed for snap-in mounting on through-hole PCBs.