API Delevan 4590-274K Fixed Inductor Equivalent & Substitute Parts

Part Overview

The API Delevan 4590-274K is a 270 µH fixed wirewound inductor with a ferrite drum core, rated for 1.715 A continuous current and 226 mOhm maximum DC resistance. This through-hole axial component operates across the temperature range of -55°C to 125°C and is designed for applications requiring stable inductance values in compact form factors.

The 4590-274K is classified as an active product with current inventory availability. Substitute parts are identified to provide design flexibility, accommodate supply chain variations, or address specific compliance requirements in production environments.

Substiute Parts

4590-274K

API Delevan Inc.In Stock: 9224590-274K Datasheet

Current PartRFQ

4590R-274K

API Delevan Inc.In Stock: 50384590R-274K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4590-274K is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Inductance value: 270 µH
• Inductance tolerance: ±10%
• Current rating: 1.715 A minimum
• Saturation current (Isat): 1.1 A minimum
• DC resistance: 226 mOhm maximum
• Core material: Ferrite
• Operating temperature range: -55°C to 125°C minimum

Mechanical Parameters (Must Match):

• Core type: Drum core, wirewound, unshielded
• Mounting: Through hole
• Package: Axial
• Physical dimensions: 0.455" Dia × 0.900" L (11.55 mm × 22.86 mm)

The 4590R-274K meets all electrical and mechanical equivalence criteria and is classified as a direct substitute. Differences in product series designation (4590 versus 4590R) and RoHS compliance status do not affect functional interchangeability in applications where the specified electrical and thermal parameters are required.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (4590-274K): The 4590-274K is suitable for applications where RoHS compliance is not a regulatory requirement. This part maintains active product status with established supply availability (870 pcs in stock).

Alternative Selection (4590R-274K): The 4590R-274K is the preferred substitute when RoHS3 compliance is mandated by design specifications, procurement standards, or regional regulations. This variant is electrically and mechanically identical to the 4590-274K and carries higher inventory availability (5019 pcs in stock). Both parts are classified as active products from API Delevan Inc.

Selection between these two parts is determined solely by compliance requirements. No functional performance differences exist between the 4590-274K and 4590R-274K when applied within the specified electrical and thermal operating parameters.

Frequently Asked Questions (FAQ)

Q: Are the 4590-274K and 4590R-274K electrically interchangeable?

A: Yes. Both parts have identical inductance (270 µH ±10%), current rating (1.715 A), saturation current (1.1 A), and DC resistance (226 mOhm max). They operate across the same temperature range (-55°C to 125°C) and are tested at 1 kHz.

Q: What is the difference between the 4590 and 4590R series?

A: The primary difference is RoHS compliance status. The 4590-274K is RoHS non-compliant, while the 4590R-274K is RoHS3 compliant. All electrical and mechanical specifications are identical.

Q: Can I use the 4590R-274K as a drop-in replacement for the 4590-274K?

A: Yes. Both parts share identical physical dimensions (0.455" Dia × 0.900" L), axial package configuration, through-hole mounting, and all electrical parameters. No circuit modifications or board layout changes are required.

Q: What determines whether a part can substitute for the 4590-274K?

A: Substitution requires exact matching of inductance value (270 µH), tolerance (±10%), current rating (1.715 A), saturation current (1.1 A), DC resistance (226 mOhm max), core material (ferrite), core type (drum core, unshielded), operating temperature range (-55°C to 125°C), mounting type (through hole), package (axial), and physical dimensions (0.455" Dia × 0.900" L).

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical inductance, current handling, and thermal characteristics.

Q: What is the saturation current specification, and why is it important?

A: Saturation current (Isat = 1.1 A) is the DC current level at which the inductor's inductance begins to degrade due to core saturation. Applications must not exceed this threshold to maintain specified inductance values. The continuous current rating (1.715 A) is higher than Isat, indicating the part is designed for AC or pulsed current applications where peak currents may exceed saturation levels without sustained DC bias.

Q: Are there inventory or lead time considerations between these parts?

A: The 4590R-274K has significantly higher inventory availability (5019 pcs) compared to the 4590-274K (870 pcs). For applications without RoHS compliance mandates, the 4590R-274K may offer supply chain advantages.