ROX1SF150K Equivalent & Substitute Parts

Part Overview

The ROX1SF150K is a 150 kOhms ±1% 1W axial through-hole resistor manufactured by TE Connectivity Passive Product. This component features metal oxide film construction with flame-proof and pulse-withstanding characteristics, designed for safety-critical applications. The product is currently obsolete, necessitating identification of functionally equivalent active alternatives to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

ROX1SF150K

TE Connectivity Passive ProductIn Stock: 1011ROX1SF150K Datasheet

Current PartRFQ

FMF1WSFRF52-150K

YAGEOIn Stock: 1108FMF1WSFRF52-150K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROX1SF150K is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 150 kOhms
• Tolerance: ±1%
• Power rating: 1W
• Package configuration: Axial through-hole
• Flame-proof and safety certifications

Acceptable Variation Parameters:

• Composition: Metal oxide film or metal film (both provide equivalent electrical performance in this application)
• Temperature coefficient: Substitute may have improved specification (lower ppm/°C value)
• Operating temperature range: Substitute may have extended upper temperature limit
• Physical dimensions: Minor variations acceptable within axial package constraints

The FMF1WSFRF52-150K from YAGEO meets all mandatory matching parameters and qualifies as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The FMF1WSFRF52-150K is a qualified substitute for the ROX1SF150K based on the following engineering criteria:

Electrical Equivalence: Both components provide identical resistance (150 kOhms) and tolerance (±1%) specifications. The 1W power rating is matched, ensuring equivalent thermal performance in circuit applications.

Package Compatibility: Both components utilize axial through-hole configuration, permitting direct board-level substitution without PCB redesign. Physical dimensions are comparable, with the FMF1WSFRF52-150K featuring slightly reduced envelope dimensions.

Performance Enhancement: The FMF1WSFRF52-150K demonstrates superior temperature stability with a temperature coefficient of ±100ppm/°C compared to the ROX1SF150K's ±350ppm/°C. The extended operating temperature range (-55°C ~ 155°C) provides additional thermal margin.

Compliance Status: The FMF1WSFRF52-150K maintains active product status with ROHS3 compliance and REACH unaffected designation, supporting current manufacturing and regulatory requirements.

Availability: The FMF1WSFRF52-150K is available in production quantities (1091 Pcs in stock), addressing the obsolescence of the original component.

Frequently Asked Questions (FAQ)

Q: Can the FMF1WSFRF52-150K be used as a direct replacement for the ROX1SF150K in existing designs?

A: Yes. Both components share identical electrical specifications (150 kOhms, ±1%, 1W) and axial package configuration. The FMF1WSFRF52-150K is electrically and mechanically compatible for direct substitution without circuit modification.

Q: What is the difference between metal oxide film and metal film composition?

A: Both compositions provide equivalent electrical performance for this application. Metal film construction in the FMF1WSFRF52-150K offers improved temperature stability (±100ppm/°C versus ±350ppm/°C), resulting in more consistent resistance values across the operating temperature range.

Q: Are there dimensional compatibility concerns between these components?

A: The FMF1WSFRF52-150K has slightly smaller dimensions (0.130" Dia x 0.354" L) compared to the ROX1SF150K (0.138" Dia x 0.394" L). Both fit standard axial component footprints. Verify PCB layout clearances if space constraints exist in the original design.

Q: Does the FMF1WSFRF52-150K meet safety and flame-proof requirements?

A: Yes. The FMF1WSFRF52-150K includes flame-proof and safety certifications matching the original component's safety feature set.

Q: What is the significance of the FMF1WSFRF52-150K's extended temperature range?

A: The FMF1WSFRF52-150K operates to 155°C compared to the ROX1SF150K's 130°C maximum. This provides additional thermal margin in applications approaching the upper temperature limit, enhancing component reliability in high-temperature environments.

Q: Is the FMF1WSFRF52-150K RoHS compliant?

A: Yes. The FMF1WSFRF52-150K is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.