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Ohmite 43F1R0 Equivalent & Substitute Parts
Part Overview
The Ohmite 43F1R0 is a 1 Ohm ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is classified as Active product status with 942 units currently in stock. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, manufacturing discontinuation, or specific application requirements that align with the electrical and mechanical parameters of this resistor category.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1 Ohms |
| Tolerance | ±1% |
| Power Rating | 3W |
| Composition | Wirewound |
| Package Type | Axial |
| Temperature Coefficient | ±50ppm/°C |
| Number of Terminations | 2 |
Substitute Part Grouping Explanation
Substitution validity for the Ohmite 43F1R0 is determined by matching the following critical parameters: resistance value (1 Ohm), tolerance (±1%), power rating (3W), composition (wirewound), package type (axial), temperature coefficient (±50ppm/°C), and termination count (2). All identified substitute parts meet these core electrical and mechanical specifications. Substitutes are categorized by manufacturer and packaging configuration while maintaining functional equivalence within the wirewound axial resistor category.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Composition | Package | Temp Coeff | Size (mm) | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| 43F1R0 | Ohmite | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 5.60 x 15.10 | RoHS non-compliant |
| 43F1R0E | Ohmite | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 5.60 x 15.10 | RoHS Compliant |
| 83F1R0 | Ohmite | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 5.50 x 15.10 | RoHS non-compliant |
| ALSR031R000FE12 | Vishay Dale | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 4.57 x 12.70 | ROHS3 Compliant |
| RS02B1R000FE70 | Vishay Dale | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 4.75 x 14.22 | ROHS3 Compliant |
| RS02B1R000FS70 | Vishay Dale | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 4.75 x 14.22 | RoHS non-compliant |
| UB3C-1RF1 | Riedon | 1 Ohm | ±1% | 3 | Wirewound | Axial | ±50ppm/°C | 4.00 x 8.90 | ROHS3 Compliant |
Engineering Selection Recommendations
Selection among substitute parts should be based on compliance requirements and product status. The Ohmite 43F1R0E provides direct equivalence with RoHS Compliant certification and identical dimensional specifications. For applications requiring ROHS3 compliance, the Vishay Dale RS02B1R000FE70 and Riedon UB3C-1RF1 are suitable alternatives. The Vishay Dale ALSR031R000FE12 offers moisture-resistant construction with ROHS3 compliance. The Riedon UB3C-1RF1 includes additional features such as current sense capability, flame proof construction, and pulse withstanding characteristics. All substitute parts maintain the core electrical parameters of 1 Ohm resistance, ±1% tolerance, and 3W power rating required for functional equivalence.
Frequently Asked Questions (FAQ)
Q: Can the 43F1R0E be used as a direct replacement for the 43F1R0? A: Yes. The 43F1R0E is a parametric equivalent with identical resistance, tolerance, power rating, composition, package type, and temperature coefficient. The primary difference is RoHS compliance status and packaging configuration (Bulk vs. standard).
Q: What are the dimensional considerations when substituting with Vishay Dale or Riedon parts? A: Substitute parts from Vishay Dale and Riedon have slightly different physical dimensions. The RS02B1R000FE70 and RS02B1R000FS70 measure 4.75 x 14.22mm, the ALSR031R000FE12 measures 4.57 x 12.70mm, and the UB3C-1RF1 measures 4.00 x 8.90mm, compared to the original 5.60 x 15.10mm. PCB layout and mechanical clearance must be verified before substitution.
Q: Which substitute part offers the best compliance profile? A: The Ohmite 43F1R0E, Vishay Dale RS02B1R000FE70, and Riedon UB3C-1RF1 all carry ROHS3 compliance. Selection depends on specific application requirements and packaging needs.
Q: Are there packaging differences among the substitute parts? A: Yes. The Vishay Dale RS02B1R000FE70 is supplied in Cut Tape (CT) packaging, while RS02B1R000FS70 is supplied in Tape & Reel (TR). The Ohmite 43F1R0E and Riedon UB3C-1RF1 are supplied in Bulk packaging. ALSR031R000FE12 is also Bulk packaged.
Q: What additional features does the Riedon UB3C-1RF1 provide? A: The Riedon UB3C-1RF1 includes current sense capability, flame proof construction, moisture resistance, and pulse withstanding characteristics. These features may be beneficial for specialized applications but are not required for basic functional equivalence.
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