UBW1H3R3MPD Equivalent & Substitute Parts

Part Overview

The UBW1H3R3MPD is a 3.3 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for automotive applications with a lifetime specification of 1000 hours at 135°C. The part is currently obsolete, making identification of suitable substitute components necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

UBW1H3R3MPD

NichiconIn Stock: 777UBW1H3R3MPD Datasheet

Current PartRFQ

350WXA3.3MEFC8X9

RubyconIn Stock: 975350WXA3.3MEFC8X9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete UBW1H3R3MPD is based on the following electrical and mechanical compatibility criteria:

Electrical Parameters:

• Capacitance value must match: 3.3 µF
• Tolerance must be compatible: ±20%
• Voltage rating must equal or exceed the original: minimum 50 V
• Polarization must remain polar

Mechanical Parameters:

• Package type must be radial, can configuration
• Mounting type must be through hole
• Lead spacing must match: 0.138" (4.60 mm)
• Case diameter must match: 0.315" (8.00 mm)
• Physical dimensions must accommodate existing PCB layouts

Application & Compliance:

• Automotive-rated components preferred
• RoHS3 compliance required
• REACH compliance maintained

The substitute part 350WXA3.3MEFC8X9 from Rubycon meets all electrical and mechanical compatibility requirements while offering enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 350WXA3.3MEFC8X9 is a direct functional substitute for the obsolete UBW1H3R3MPD. Both components share identical capacitance, tolerance, lead spacing, and case diameter specifications. The substitute part maintains automotive-rated qualification and ROHS3 compliance.

The Rubycon part offers a higher voltage rating (350 V versus 50 V), which provides additional design margin and does not create incompatibility in circuits designed for the original 50 V specification. The substitute has a reduced seated height (0.413" versus 0.531"), which may provide layout advantages in space-constrained applications. The substitute part carries active product status with established supply availability, ensuring long-term component sourcing reliability.

Frequently Asked Questions (FAQ)

Q: Can the 350WXA3.3MEFC8X9 directly replace the UBW1H3R3MPD in existing designs?

A: Yes. Both parts have identical capacitance (3.3 µF), tolerance (±20%), lead spacing (0.138"), case diameter (0.315"), and mounting configuration (through hole, radial can). The higher voltage rating of the substitute does not create functional incompatibility.

Q: What is the physical height difference between these parts?

A: The UBW1H3R3MPD has a maximum seated height of 0.531" (14.60 mm), while the 350WXA3.3MEFC8X9 measures 0.413" (10.50 mm). The substitute is approximately 0.118" shorter, which may affect PCB layout clearance in height-constrained applications.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the original and substitute parts are rated for automotive applications and maintain ROHS3 compliance. The substitute carries AEC-Q200 qualification.

Q: What is the difference in lifetime specifications?

A: The original part is rated for 1000 hours at 135°C. The substitute is rated for 2000 hours at 105°C. Operating temperature ranges differ: the original operates from -55°C to 135°C, while the substitute operates from -25°C to 105°C.

Q: Are there any lead spacing or mounting compatibility concerns?

A: No. Both parts have identical lead spacing (0.138" / 4.60 mm) and case diameter (0.315" / 8.00 mm), ensuring direct PCB footprint compatibility.