Ohmite 45F680 680 Ohm 5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 45F680 is a 680 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision resistive elements with moderate power dissipation in compact axial packages. The part maintains active product status with 903 units in current inventory. Substitute parts are identified when packaging configurations, compliance certifications, or inventory availability require alternative sourcing while maintaining identical electrical performance.

Substiute Parts

45F680

OhmiteIn Stock: 96245F680 Datasheet

Current PartRFQ

45F680E

OhmiteIn Stock: 96745F680E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F680 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 680 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Number of terminations: 2

The identified substitute part 45F680E maintains complete equivalence across all electrical specifications and mechanical form factors. Differences exist only in packaging configuration (Bulk vs. standard), RoHS compliance status, and operating temperature range documentation.

Parameter Comparison

Engineering Selection Recommendations

Both the 45F680 and 45F680E are active products from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

45F680 (Main Part): Select when standard packaging is required and RoHS compliance is not a design constraint. This part carries RoHS non-compliant status and is suitable for applications without regulatory RoHS requirements.

45F680E (Substitute): Select when RoHS compliance is mandatory for the end application or when bulk packaging configuration aligns with procurement workflows. This variant is RoHS Compliant and includes documented operating temperature range of -55°C ~ 275°C, providing explicit thermal performance specification.

Both parts are suitable for direct substitution in applications requiring 680 Ohm ±1% 5W axial wirewound resistors. The choice between them depends on compliance requirements and packaging preferences rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can 45F680E be used as a direct replacement for 45F680?

A: Yes. The 45F680E is electrically and mechanically equivalent to the 45F680. Both parts share identical resistance (680 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), package type (axial), and physical dimensions (0.343" Dia x 0.937" L). Substitution is valid for any application using the 45F680.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging configuration (Bulk vs. standard) and RoHS compliance status. The 45F680E is RoHS Compliant, while the 45F680 is RoHS non-compliant. The 45F680E also includes documented operating temperature range (-55°C ~ 275°C), whereas the 45F680 does not specify this parameter.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical characteristics. Both parts deliver identical electrical performance in 680 Ohm ±1% 5W specifications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.343" Dia x 0.937" L (8.70mm x 23.80mm) and use axial package configuration. They are mechanically interchangeable in PCB layouts and through-hole applications.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory and compliance requirements. For applications requiring RoHS compliance, specify 45F680E. For applications without RoHS constraints, either part is acceptable based on availability and packaging preference.

Q: What is the temperature coefficient significance?

A: Both parts share ±20ppm/°C temperature coefficient, indicating resistance value will vary by approximately ±20 parts per million for each degree Celsius change in operating temperature. This specification is identical across both parts.