43F18RE Equivalent & Substitute Parts

Part Overview

The 43F18RE is an 18 Ohms ±1% 3W through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This axial wirewound resistor is designed for applications requiring precision resistance with high power dissipation capability. The part is currently active in production with 714 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific packaging preferences.

Substiute Parts

43F18RE

OhmiteIn Stock: 79443F18RE Datasheet

Current PartRFQ

RS02B18R00FE70

Vishay DaleIn Stock: 1677RS02B18R00FE70 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F18RE is determined by the following critical parameters:

• Resistance Value: Must be 18 Ohms
• Tolerance: Must be ±1%
• Power Rating: Must be 3W
• Composition: Must be Wirewound
• Package Type: Must be Axial
• Temperature Coefficient: Must be ±20ppm/°C
• Number of Terminations: Must be 2
• RoHS Compliance: Must meet RoHS requirements

The RS02B18R00FE70 manufactured by Vishay Dale meets all critical electrical and mechanical parameters, making it a valid substitute for the 43F18RE.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F18RE and RS02B18R00FE70 are active production parts with full RoHS compliance. The 43F18RE offers an operating temperature range of -55°C to 275°C, while the RS02B18R00FE70 operates from -65°C to 250°C. Selection between these parts should be based on the specific thermal requirements of the application. The RS02B18R00FE70 includes moisture-resistant features and is available in cut tape packaging, which may provide advantages for automated assembly processes. Both parts maintain identical electrical specifications including resistance value, tolerance, power rating, and temperature coefficient, ensuring functional equivalence in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can RS02B18R00FE70 replace 43F18RE in all applications?

A: The RS02B18R00FE70 is electrically equivalent to the 43F18RE with identical resistance, tolerance, power rating, and temperature coefficient. However, verify that the operating temperature range of -65°C to 250°C meets your application requirements, as the 43F18RE extends to 275°C. Physical dimensions differ slightly, so confirm PCB layout compatibility.

Q: What are the key differences between these parts?

A: The primary differences are operating temperature range (43F18RE: -55°C to 275°C; RS02B18R00FE70: -65°C to 250°C), physical dimensions (43F18RE: 5.60mm x 15.10mm; RS02B18R00FE70: 4.75mm x 14.22mm), packaging format (43F18RE: Box; RS02B18R00FE70: Cut Tape), and moisture resistance feature (RS02B18R00FE70 only).

Q: Are both parts RoHS compliant?

A: Yes. The 43F18RE is RoHS Compliant, and the RS02B18R00FE70 is ROHS3 Compliant, both meeting regulatory requirements for hazardous substance restrictions.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Box versus Cut Tape) affects supply chain handling and assembly automation compatibility but does not alter electrical characteristics or performance.

Q: Which part should I select for high-temperature applications?

A: For applications requiring operation above 250°C, the 43F18RE with its 275°C maximum operating temperature is the appropriate choice.