381LX151M350J022 Equivalent & Substitute Parts Reference

Part Overview

The 381LX151M350J022 is a 150 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is Active status and ROHS3 compliant.

Equivalent and substitute parts are identified when they maintain the same capacitance value, tolerance, and mounting configuration while meeting or exceeding voltage and thermal performance specifications. Alternative components may offer enhanced reliability through extended lifetime ratings or higher voltage ratings for applications requiring design margin.

Substiute Parts

381LX151M350J022

Cornell Dubilier Electronics (CDE)In Stock: 883381LX151M350J022 Datasheet

Current PartRFQ

381LQ151M350H022

Cornell Dubilier Electronics (CDE)In Stock: 1840381LQ151M350H022 Datasheet

SimilarRFQ

450VXG150MEFCSN25X30

RubyconIn Stock: 3214450VXG150MEFCSN25X30 Datasheet

UpgradeRFQ

450VXH150MEFCSN25X30

RubyconIn Stock: 274092450VXH150MEFCSN25X30 Datasheet

UpgradeRFQ

B43508B5157M000

EPCOS - TDK ElectronicsIn Stock: 1158B43508B5157M000 Datasheet

UpgradeRFQ

LGX2W151MELA30

NichiconIn Stock: 3406LGX2W151MELA30 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the 381LX151M350J022 is based on the following criteria:

Core Compatibility Requirements (Non-Negotiable):

• Capacitance: 150 µF (exact match)
• Tolerance: ±20% (exact match)
• Mounting Type: Through Hole (exact match)
• Package / Case: Radial, Can - Snap-In (exact match)
• Lead Spacing: 0.394" (10.00 mm) (exact match)
• Polarization: Polar (exact match)

Voltage Rating Substitution Logic:

• Direct substitutes: 350 V rated (same voltage class)
• Upgrade substitutes: 450 V rated (higher voltage rating provides design margin and is backward compatible in 350 V applications)

Thermal Performance Substitution Logic:

• Direct substitutes: 3000 Hrs @ 105°C (same lifetime rating)
• Upgrade substitutes: 5000 Hrs @ 105°C (extended lifetime provides enhanced reliability)

Physical Dimension Compatibility:

• Diameter tolerance: 0.866" to 0.984" (22.00 to 25.00 mm) acceptable within snap-in mounting constraints
• Height: 1.260" (32.00 mm) fixed across all substitutes
• Lead spacing: 0.394" (10.00 mm) fixed across all substitutes

Compliance Requirements:

• RoHS3 Compliant (all substitutes meet this requirement)
• REACH Unaffected (all substitutes meet this requirement)

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Class):

The 381LQ151M350H022 (Cornell Dubilier Electronics, 381LQ series) is a direct equivalent with identical voltage rating (350 V) and capacitance (150 µF). This part operates at 2000 hours @ 105°C, which is lower than the original 3000-hour rating. The physical diameter is reduced to 22.00 mm, which remains compatible with standard 10.00 mm lead spacing snap-in mounting. This substitute is suitable for applications where the reduced lifetime is acceptable and space constraints favor a smaller diameter package.

Upgrade Substitutes (Higher Voltage Rating):

The following parts provide 450 V rated voltage with extended or equivalent thermal performance:

1. 450VXG150MEFCSN25X30 (Rubycon, VXG series): 5000-hour lifetime at 105°C with 25.00 mm diameter. Identical physical dimensions to the original part. Provides 100 V voltage margin and doubled thermal endurance.

2. 450VXH150MEFCSN25X30 (Rubycon, VXH series): 5000-hour lifetime at 105°C with 25.00 mm diameter. Identical physical dimensions to the original part. Highest ripple current capability (1.12 A @ 120 Hz, 1.568 A @ 10 kHz). Provides 100 V voltage margin and doubled thermal endurance.

3. B43508B5157M000 (EPCOS - TDK Electronics, B43508 series): 450 V rated with 3000-hour lifetime at 105°C. Maintains original thermal performance while providing 100 V voltage margin. Extended operating temperature range (-40°C to 105°C) supports applications in cold environments.

4. LGX2W151MELA30 (Nichicon, LGX series): 450 V rated with 5000-hour lifetime at 105°C. Identical physical dimensions to the original part. Provides 100 V voltage margin and doubled thermal endurance.

All upgrade substitutes are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of a 350 V rated capacitor?

A: Yes. A higher voltage rating is backward compatible in applications designed for lower voltage. The 450 V substitutes provide design margin and do not degrade performance in 350 V circuits. All dimensions and mounting configurations remain identical.

Q: What is the difference between the 381LQ151M350H022 and the original 381LX151M350J022?

A: Both parts share the same capacitance (150 µF), voltage (350 V), and tolerance (±20%). The 381LQ has a reduced diameter (22.00 mm vs. 25.00 mm) and lower lifetime rating (2000 hours vs. 3000 hours @ 105°C). The 381LQ is suitable only when space constraints are critical and the reduced lifetime is acceptable.

Q: Why do the Rubycon and Nichicon 450 V parts have 5000-hour lifetimes while the original has 3000 hours?

A: Lifetime rating reflects the manufacturer's thermal design and materials. The 5000-hour rating indicates enhanced reliability through superior thermal management and component construction. This is an upgrade benefit, not a compatibility issue.

Q: Are all substitute parts physically interchangeable?

A: Yes, all substitutes maintain the same lead spacing (10.00 mm), height (32.00 mm), and snap-in mounting configuration. The 381LQ has a reduced diameter (22.00 mm vs. 25.00 mm), which may affect fit in applications with tight diameter tolerances, but remains mechanically compatible with standard snap-in mounting.

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

A: ESR affects ripple current handling and heat dissipation. The 381LQ151M350H022 specifies 1.105 Ohm @ 120 Hz, while the original does not specify ESR. The B43508B5157M000 specifies 820 mOhm @ 100 Hz, indicating lower impedance and better high-frequency performance. Higher ripple current ratings in upgrade parts (Rubycon and Nichicon) indicate superior ESR characteristics.

Q: Can I mix different manufacturers' parts in the same circuit?

A: Yes. All substitutes meet identical electrical specifications (150 µF, ±20%, through-hole radial snap-in package) and compliance requirements (ROHS3, REACH unaffected). Mixing manufacturers is acceptable from an engineering standpoint, though procurement and supply chain considerations may apply.

Q: Which substitute offers the best overall performance?

A: The 450VXH150MEFCSN25X30 (Rubycon, VXH series) and LGX2W151MELA30 (Nichicon, LGX series) both provide 450 V rating with 5000-hour lifetime and identical physical dimensions. The 450VXH has the highest ripple current capability (1.12 A @ 120 Hz). Selection depends on availability, cost, and specific application ripple current requirements.

Q: What is the operating temperature range difference between parts?

A: The original 381LX and most substitutes operate from -25°C to 105°C. The B43508B5157M000 extends the lower limit to -40°C, making it suitable for applications requiring cold-temperature operation. This is an upgrade benefit for specific environmental requirements.