UB3C-150RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-150RF8 is a 150 Ohm, ±1% tolerance, 3W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing functionality with enhanced reliability features including flame proof, moisture resistant, and pulse withstanding characteristics. The part is Active in product status and maintains full inventory availability. Substitute parts are identified when original stock becomes unavailable or when procurement from alternative manufacturers is required while maintaining electrical and mechanical compatibility.

Substiute Parts

UB3C-150RF8

RiedonIn Stock: 782UB3C-150RF8 Datasheet

Current PartRFQ

43F150E

OhmiteIn Stock: 85443F150E Datasheet

MFR RecommendedRFQ

RS02B150R0FE70

Vishay DaleIn Stock: 2501RS02B150R0FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB3C-150RF8 are qualified based on the following critical parameters that must match or exceed the main part specifications:

Electrical Parameters (Must Match):

• Resistance value: 150 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Temperature coefficient: ±20ppm/°C

Mechanical Parameters (Must Match):

• Package type: Axial
• Number of terminations: 2
• Composition: Wirewound

Environmental & Compliance Parameters (Must Meet or Exceed):

• Operating temperature range capability
• RoHS compliance status
• Moisture sensitivity level

The identified substitutes (43F150E and RS02B150R0FE70) satisfy all critical electrical and mechanical parameters. Both parts maintain the required 150 Ohm resistance, ±1% tolerance, 3W power rating, and axial package configuration. Operating temperature ranges and compliance certifications meet or exceed the original specification requirements.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and meet the core electrical specifications of 150 Ohms ±1% at 3W with wirewound composition and axial packaging. Selection between these parts should be based on the following factors:

UB3C-150RF8 (Riedon): Primary choice when original part availability is confirmed. Offers the most compact physical dimensions (4.00mm x 8.90mm) and includes current sense, flame proof, and pulse withstanding features. ROHS3 compliant with REACH Unaffected status.

43F150E (Ohmite): Extended operating temperature range to 275°C provides additional thermal margin. RoHS compliant with larger physical dimensions (5.60mm x 15.10mm). Suitable for applications requiring higher temperature capability.

RS02B150R0FE70 (Vishay Dale): Extended lower temperature limit to -65°C and moisture resistant feature. ROHS3 compliant with REACH Unaffected status. Intermediate physical dimensions (4.75mm x 14.22mm). Highest current inventory availability (2408 pcs).

Physical dimensions vary between parts and must be verified against PCB layout constraints before final selection.

Frequently Asked Questions (FAQ)

Q: Can 43F150E be used as a direct replacement for UB3C-150RF8?

A: Yes, from an electrical standpoint. Both parts share identical resistance (150 Ohms), tolerance (±1%), power rating (3W), temperature coefficient (±20ppm/°C), and axial package configuration. However, the 43F150E has larger physical dimensions (5.60mm x 15.10mm versus 4.00mm x 8.90mm), which must be verified against PCB layout requirements.

Q: What is the difference in operating temperature ranges?

A: UB3C-150RF8 operates from -55°C to 250°C. The 43F150E extends to 275°C at the upper limit. The RS02B150R0FE70 extends to -65°C at the lower limit. Selection depends on the specific thermal environment of the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. UB3C-150RF8 and RS02B150R0FE70 are ROHS3 compliant. The 43F150E is RoHS compliant. All three parts meet regulatory requirements for lead-free manufacturing.

Q: How do physical dimensions affect substitution?

A: Physical dimensions vary between parts. UB3C-150RF8 is the most compact at 4.00mm diameter x 8.90mm length. The 43F150E is the largest at 5.60mm x 15.10mm. The RS02B150R0FE70 is intermediate at 4.75mm x 14.22mm. PCB layout and component spacing must accommodate the selected part's dimensions.

Q: What is the significance of moisture sensitivity level?

A: UB3C-150RF8 and 43F150E both have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. RS02B150R0FE70 lists MSL as Not Applicable, indicating the part does not require moisture sensitivity classification. All three parts are suitable for standard storage and handling conditions.

Q: Can these parts be used interchangeably in all applications?

A: Electrical interchangeability is confirmed for the specified parameters. However, physical dimensions must be verified against PCB layout. Applications requiring specific features (current sense, flame proof, pulse withstanding) should reference the detailed feature descriptions for each manufacturer's part.