LDQ2G181MERZGA Equivalent & Substitute Parts

Part Overview

The LDQ2G181MERZGA is a 180 µF, 400 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production. Substitute parts may be required due to inventory constraints, obsolescence of primary sources, or application-specific performance requirements such as extended lifetime ratings or different lead spacing configurations.

Substiute Parts

LDQ2G181MERZGA

NichiconIn Stock: 273994LDQ2G181MERZGA Datasheet

Current PartRFQ

UPT2G181MRD

NichiconIn Stock: 948UPT2G181MRD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LDQ2G181MERZGA is determined by the following critical parameters:

• Electrical Match: Capacitance (180 µF), voltage rating (400 V), and tolerance (±20%) must be identical
• Mechanical Compatibility: Package type (radial, can), mounting type (through hole), and lead spacing must accommodate PCB layout constraints
• Environmental Compliance: RoHS3 compliance and REACH status must be maintained
• Thermal Performance: Operating temperature range (-25°C to 105°C) must be supported

The UPT2G181MRD meets all electrical and environmental criteria. However, it differs in lead spacing (0.394" vs. 0.335") and height (1.654" vs. 1.772"), which may require PCB layout verification. The UPT2G181MRD also provides extended lifetime (5000 hours at 105°C) compared to the primary part.

Parameter Comparison

Engineering Selection Recommendations

LDQ2G181MERZGA is the primary selection for new designs. It is actively manufactured, ensuring long-term availability and supply chain stability. It meets all RoHS3 and REACH compliance requirements.

UPT2G181MRD is available as a substitute where PCB layout accommodates the 0.394" lead spacing and 1.654" height. This part offers extended thermal lifetime (5000 hours at 105°C versus 2000 hours), which may provide performance advantages in high-temperature applications. However, the obsolete product status indicates limited future availability. Lead spacing and height differences require PCB layout verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can UPT2G181MRD be used as a direct replacement for LDQ2G181MERZGA?

A: Electrical and environmental specifications are identical. However, lead spacing differs by 0.059" (1.50 mm) and height differs by 0.118" (3.00 mm). PCB layout must be verified to confirm mechanical compatibility.

Q: What is the significance of the different lead spacing?

A: Lead spacing determines the distance between solder pads on the PCB. The LDQ2G181MERZGA requires 0.335" spacing, while the UPT2G181MRD requires 0.394" spacing. Mismatched spacing will result in solder joint misalignment or component mounting failure.

Q: Why does UPT2G181MRD have a longer lifetime rating?

A: The UPT series is rated for 5000 hours at 105°C compared to the LDQ series at 2000 hours. This difference reflects different internal construction and materials within the same electrical specifications.

Q: Is UPT2G181MRD suitable for new production designs?

A: The UPT2G181MRD is marked as obsolete, indicating discontinued manufacturing. It should not be selected for new designs requiring long-term component availability. Use LDQ2G181MERZGA for new production.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both LDQ2G181MERZGA and UPT2G181MRD are ROHS3 compliant and REACH unaffected, meeting current environmental standards.