AY101K Equivalent & Substitute Parts

Part Overview

The AY101K is a 100 Ohm, 4.5W radial through-hole resistor manufactured by Ohmite as part of the PulsEater® A series. This ceramic composition resistor features flame retardant coating, moisture resistance, non-inductive design, and pulse withstanding capability, making it suitable for applications requiring robust thermal and electrical performance in harsh environments. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Substiute Parts

AY101K

OhmiteIn Stock: 1142AY101K Datasheet

Current PartRFQ

AY101KE

OhmiteIn Stock: 723AY101KE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AY101K is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 100 Ohms
• Tolerance: ±10%
• Power dissipation: 4.5W
• Composition: Ceramic
• Package configuration: Radial through-hole
• Operating temperature range: -55°C to 150°C
• Physical dimensions: Compatible radial form factor
• Termination count: 2-pin configuration

The AY101KE qualifies as a direct substitute based on matching all critical electrical specifications and mechanical compatibility. Both parts maintain identical resistance, tolerance, power rating, and operating temperature parameters. The radial package geometry and two-pin termination structure ensure mechanical interchangeability in existing circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

The AY101KE is the direct equivalent for the obsolete AY101K. Both parts are manufactured by Ohmite and maintain identical electrical and mechanical specifications across all critical parameters: 100 Ohm resistance, ±10% tolerance, 4.5W power rating, ceramic composition, and radial package configuration.

The primary distinction between the two parts is product status and regulatory compliance. The AY101K is obsolete and RoHS non-compliant, while the AY101KE is an active product with RoHS compliance. For new designs or component replenishment, the AY101KE is the appropriate selection. The AY101KE is currently available with 704 pieces in stock, providing adequate supply for production requirements.

Both parts operate across the identical temperature range of -55°C to 150°C and incorporate the same protective features: flame retardant coating, moisture resistance, non-inductive design, and pulse withstanding capability. Physical dimensions remain compatible for direct board-level substitution.

Frequently Asked Questions (FAQ)

Q: Can the AY101KE be used as a direct replacement for the AY101K in existing designs?

A: Yes. The AY101KE is electrically and mechanically equivalent to the AY101K. Both parts share identical resistance (100 Ohms), tolerance (±10%), power rating (4.5W), operating temperature range (-55°C to 150°C), and radial package configuration. Direct substitution is supported without circuit modification.

Q: What is the primary reason for substituting the AY101K?

A: The AY101K is obsolete. The AY101KE provides continued access to equivalent functionality from an active product line with improved regulatory compliance (RoHS compliant).

Q: Are the physical dimensions identical between AY101K and AY101KE?

A: Yes. Both parts maintain the same radial form factor with compatible dimensions: 0.984" L x 0.827" W (25.00mm x 21.00mm) and maximum seated height of 1.102" (28.00mm). Board layout and mounting requirements remain unchanged.

Q: Does the AY101KE maintain the same protective features as the AY101K?

A: Yes. Both parts incorporate flame retardant coating, moisture resistance, non-inductive design, and pulse withstanding capability. The ceramic composition and safety features are preserved in the substitute part.

Q: What is the difference in RoHS compliance between these parts?

A: The AY101K is RoHS non-compliant, while the AY101KE is RoHS compliant. For applications subject to RoHS regulations or customer requirements, the AY101KE is the appropriate selection.