OY121K Equivalent & Substitute Parts

Part Overview

The OY121K is a 120 Ohms ±10% 2W through-hole axial resistor manufactured by Ohmite, featuring ceramic composition with moisture-resistant and pulse-withstanding characteristics. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The part operates across a temperature range of -40°C to 220°C and is suitable for applications requiring ceramic resistor performance in axial package configurations.

Substiute Parts

OY121K

OhmiteIn Stock: 1192OY121K Datasheet

Current PartRFQ

OY121KE

OhmiteIn Stock: 3062OY121KE Datasheet

DirectRFQ

OY121K

OhmiteIn Stock: 1192OY121K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OY121K is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 120 Ohms
• Tolerance: ±10%
• Power rating: 2W
• Composition: Ceramic
• Package configuration: Axial
• Physical dimensions: 0.276" Dia x 0.748" L (7.00mm x 19.00mm)
• Operating temperature range: -40°C ~ 220°C
• Temperature coefficient: -1000 / -1600 ppm/°C
• Features: Moisture Resistant, Pulse Withstanding

The OY121KE meets all specified parameters and serves as a direct substitute. Both parts are manufactured by Ohmite within the OY series and maintain identical electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The OY121KE is the appropriate substitute for the obsolete OY121K. Both components are electrically and mechanically identical across all specified parameters. The primary distinction is product status: OY121K is obsolete while OY121KE is active, ensuring continued availability and supply chain reliability.

For new designs or ongoing production requiring this resistor specification, OY121KE should be selected. The OY121KE offers the additional advantage of ROHS3 compliance, whereas the OY121K is RoHS non-compliant. Both parts maintain identical performance characteristics within the specified operating temperature range and are suitable for applications requiring ceramic resistor construction with moisture and pulse-withstanding capabilities.

Frequently Asked Questions (FAQ)

Q: Can OY121KE be used as a direct replacement for OY121K?

A: Yes. The OY121KE is a direct substitute for OY121K. All electrical parameters (resistance, tolerance, power rating, temperature coefficient) and mechanical specifications (package type, dimensions, termination count) are identical.

Q: What is the primary reason to substitute OY121K with OY121KE?

A: The OY121K is classified as obsolete. The OY121KE is an active product from the same manufacturer and series, ensuring continued procurement availability and supply chain support.

Q: Are there packaging differences between OY121K and OY121KE?

A: The OY121K packaging designation is listed as "-" while OY121KE is supplied in Bulk packaging. Both parts maintain identical physical dimensions and axial package configuration suitable for through-hole PCB assembly.

Q: Does RoHS compliance affect functional compatibility?

A: RoHS compliance status does not affect electrical or mechanical performance. The OY121KE is ROHS3 compliant while OY121K is RoHS non-compliant. For applications subject to RoHS requirements, OY121KE is the appropriate selection.

Q: Are the operating temperature ranges identical?

A: Yes. Both OY121K and OY121KE operate across -40°C to 220°C with identical temperature coefficients of -1000 / -1600 ppm/°C.