SLP181M350A7P3 Equivalent & Substitute Parts

Part Overview

The SLP181M350A7P3 is a 180 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures. The part maintains Active product status with 1055 units currently in stock.

Substitute parts become necessary when addressing supply chain constraints, design optimization for higher voltage margins, or when alternative manufacturer specifications better align with system requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SLP181M350A7P3

Cornell Dubilier Electronics (CDE)In Stock: 1102SLP181M350A7P3 Datasheet

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LGNW6181MELZ40

NichiconIn Stock: 856LGNW6181MELZ40 Datasheet

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LQSW6181MELZ40

NichiconIn Stock: 1153LQSW6181MELZ40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLP181M350A7P3 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Physical Dimensions: 22.00 mm diameter, 42.00 mm height seated maximum (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -25°C to 105°C minimum (exact match or better required)
• Lifetime @ 105°C: 3000 Hrs minimum (exact match or better required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: 350 V minimum (higher voltage ratings are acceptable as they provide enhanced safety margin)
• ESR: No specification constraint (manufacturer-dependent variation acceptable)
• Ripple Current: No specification constraint (manufacturer-dependent variation acceptable)

The two substitute parts listed below meet all critical matching parameters and provide equal or superior voltage ratings.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts LGNW6181MELZ40 and LQSW6181MELZ40 from Nichicon are direct functional equivalents to the SLP181M350A7P3. Selection between these options is based on the following criteria:

Compliance & Certification: All three parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification, ensuring regulatory compatibility across applications.

Voltage Rating Advantage: The Nichicon substitutes operate at 420 V rated voltage compared to the CDE part's 350 V rating. This 70 V margin increase provides enhanced safety headroom in applications operating near the original voltage specification.

Inventory Availability: LGNW6181MELZ40: 771 units in stock LQSW6181MELZ40: 1052 units in stock SLP181M350A7P3: 1055 units in stock

Series Differentiation: LGNW6181MELZ40 belongs to the Nichicon LGN series LQSW6181MELZ40 belongs to the Nichicon LQS series

Both series maintain identical electrical and mechanical specifications for this application. Series selection depends on internal supply chain or procurement preferences.

Frequently Asked Questions (FAQ)

Q: Can LGNW6181MELZ40 or LQSW6181MELZ40 be used as direct drop-in replacements for SLP181M350A7P3?

A: Yes. Both Nichicon parts are direct mechanical and electrical equivalents. Identical lead spacing (10.00 mm), physical dimensions (22.00 mm diameter, 42.00 mm height), and package configuration (radial, can snap-in, through-hole mounting) ensure PCB compatibility without modification. Capacitance (180 µF), tolerance (±20%), and operating temperature range (-25°C to 105°C) are identical.

Q: What is the significance of the higher 420 V rating on the Nichicon substitutes?

A: The 420 V rating on LGNW6181MELZ40 and LQSW6181MELZ40 represents a 70 V increase over the original 350 V specification. This higher rating does not change functional performance in circuits designed for 350 V operation. The higher rating provides additional voltage safety margin and may extend component life in applications with voltage transients or ripple conditions.

Q: Are there any electrical performance differences between the three parts?

A: Ripple current specifications show minor variations. The CDE part specifies 1.35 A at 20 kHz, while Nichicon parts specify 1.3013 A at 50 kHz. These differences reflect manufacturer test methodology rather than functional incompatibility. ESR data for Nichicon parts is not provided in specifications, whereas the CDE part specifies 1.843 Ohm @ 120Hz. All parts maintain 3000 Hrs lifetime at 105°C.

Q: Do all three parts meet the same regulatory requirements?

A: Yes. SLP181M350A7P3, LGNW6181MELZ40, and LQSW6181MELZ40 all maintain ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification. HTSUS code 8532.22.0040 applies to all three parts.

Q: What is the difference between LGNW6181MELZ40 and LQSW6181MELZ40?

A: Both parts are manufactured by Nichicon and share identical electrical and mechanical specifications for this application. The difference lies in their internal series designation: LGNW6181MELZ40 belongs to the LGN series, while LQSW6181MELZ40 belongs to the LQS series. Selection between them depends on procurement or supply chain preferences, as both deliver equivalent performance.

Q: Can these parts be used in applications requiring higher ripple current handling?

A: Ripple current specifications are provided by each manufacturer. The CDE part specifies 920 mA @ 120 Hz and 1.35 A @ 20 kHz. Nichicon parts specify 910 mA @ 120 Hz and 1.3013 A @ 50 kHz. Application requirements must be evaluated against these specific ratings. No extrapolation beyond provided specifications is appropriate.