Equivalent & Substitute Parts for UCS2D121MND9

Part Overview

The UCS2D121MND9 is a 120 µF, 200 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Active product status and is designed for general purpose applications requiring reliable energy storage and filtering in circuits operating at 200 V. Substitute parts are identified to provide alternatives when the primary part is unavailable, while maintaining electrical and mechanical compatibility within specified tolerances.

Substiute Parts

UCS2D121MND9

NichiconIn Stock: 927UCS2D121MND9 Datasheet

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UCY2D121MHD

NichiconIn Stock: 1336UCY2D121MHD Datasheet

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UCY2D121MHD6

NichiconIn Stock: 2885UCY2D121MHD6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCS2D121MND9 are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Capacitance: 120 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage - Rated: 200 V (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)
• Polarization: Polar (exact match required)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)
• Lead Spacing: 0.197" (5.00mm) for direct PCB footprint compatibility

Regulatory Compliance:

• RoHS Status: ROHS3 Compliant (required)

The substitute parts UCY2D121MHD and UCY2D121MHD6 meet all electrical requirements. However, UCY2D121MHD exhibits a different lead spacing (0.295" vs. 0.197") and larger physical dimensions, requiring PCB layout verification. UCY2D121MHD6 maintains identical lead spacing and is mechanically compatible with the original footprint.

Parameter Comparison

Engineering Selection Recommendations

UCY2D121MHD6 is the preferred substitute for direct replacement applications. This part maintains identical lead spacing (0.197" / 5.00mm) and is mechanically compatible with existing PCB layouts designed for the UCS2D121MND9. The UCY2D121MHD6 offers improved performance characteristics with 12000 Hrs lifetime at 105°C compared to 10000 Hrs, and higher ripple current ratings. Both parts are ROHS3 Compliant and Active product status.

UCY2D121MHD is electrically equivalent but requires PCB layout verification due to different lead spacing (0.295" / 7.50mm) and larger physical dimensions. This part is suitable only when PCB footprint modifications are acceptable or when space constraints are not limiting factors.

All substitute parts maintain the same electrical specifications: 120 µF capacitance, ±20% tolerance, 200 V rated voltage, and -40°C to 105°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can UCY2D121MHD be used as a direct replacement for UCS2D121MND9?

A: UCY2D121MHD is electrically equivalent but not mechanically compatible without PCB modification. The lead spacing differs (0.295" vs. 0.197"), and the physical dimensions are larger. PCB layout verification is required before substitution.

Q: Is UCY2D121MHD6 a direct drop-in replacement?

A: Yes. UCY2D121MHD6 maintains identical lead spacing (0.197" / 5.00mm) and is mechanically compatible with the original UCS2D121MND9 footprint. No PCB modifications are required.

Q: What are the key electrical parameters that must match for substitution?

A: Capacitance (120 µF), tolerance (±20%), rated voltage (200 V), operating temperature range (-40°C ~ 105°C), and polarization (Polar) must remain identical. These parameters define functional compatibility in the circuit.

Q: Do the substitute parts have better performance than the original?

A: UCY2D121MHD and UCY2D121MHD6 offer extended lifetime (12000 Hrs vs. 10000 Hrs at 105°C) and higher ripple current ratings. These represent performance improvements while maintaining electrical equivalence.

Q: Are all parts RoHS compliant?

A: Yes. UCS2D121MND9, UCY2D121MHD, and UCY2D121MHD6 are all ROHS3 Compliant.

Q: What is the difference between UCY2D121MHD and UCY2D121MHD6?

A: Both parts share identical electrical specifications and lifetime ratings. The primary difference is physical dimensions: UCY2D121MHD has a 0.630" diameter and 0.846" height with 0.295" lead spacing, while UCY2D121MHD6 has a 0.492" diameter and 1.299" height with 0.197" lead spacing. UCY2D121MHD6 is mechanically compatible with the original UCS2D121MND9 footprint.