ER1025-20KM Equivalent & Substitute Parts

Part Overview

The ER1025-20KM is a 1 µH unshielded molded inductor manufactured by API Delevan Inc., designed for through-hole axial mounting applications. This component delivers 385 mA current rating with 1 Ohm maximum DC resistance and operates across the temperature range of -55°C to 105°C. The part maintains Active product status with 833 pieces currently in stock.

Substitute parts are identified to address inventory availability, packaging format requirements, or specific application constraints while maintaining electrical and mechanical compatibility within defined parameters.

Substiute Parts

ER1025-20KM

API Delevan Inc.In Stock: 846ER1025-20KM Datasheet

Current PartRFQ

SC301R0KT

TE Connectivity Passive ProductIn Stock: 2630SC301R0KT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ER1025-20KM is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Inductance value: 1 µH (exact match required)
• Inductance tolerance: ±10% (matching tolerance band)
• DC resistance: 1 Ohm maximum (equal or lower)
• Current rating: minimum 385 mA (equal or higher)
• Q factor @ 25 MHz: 25 (matching specification)
• Self resonant frequency: 230 MHz (matching specification)
• Operating temperature range: -55°C minimum and 105°C maximum (equal or wider range)

Mechanical Compatibility Criteria:

• Mounting type: Through Hole (exact match required)
• Package case: Axial (exact match required)

The SC301R0KT from TE Connectivity Passive Product qualifies as a substitute based on matching all electrical parameters and mechanical mounting requirements. Differences in shielding type, physical dimensions, packaging format, and compliance certifications are noted but do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

ER1025-20KM Selection Basis:

• Active product status with established supply (833 pieces in stock)
• RoHS non-compliant status requires verification against end-application regulatory requirements
• Unshielded construction suitable for applications where electromagnetic shielding is not required
• Tape & Reel packaging format optimized for automated assembly processes
• Compact axial form factor (0.095" diameter) for space-constrained PCB layouts
• Operating temperature maximum of 105°C supports high-temperature applications

SC301R0KT Selection Basis:

• Active product status with higher inventory availability (2590 pieces in stock)
• ROHS3 compliant, meeting current regulatory requirements for restricted substances
• Shielded construction reduces electromagnetic interference in sensitive circuit environments
• Higher current rating (420 mA vs. 385 mA) provides additional thermal margin
• Cut Tape packaging format suitable for manual or selective assembly operations
• Larger physical dimensions (0.165" diameter) may require PCB layout verification
• Operating temperature maximum of 100°C is 5°C lower than main part specification

Selection between these parts depends on specific application requirements regarding shielding necessity, regulatory compliance mandates, assembly process capabilities, and available PCB space.

Frequently Asked Questions (FAQ)

Q: Can SC301R0KT directly replace ER1025-20KM in all applications?

A: SC301R0KT matches all critical electrical parameters (inductance, tolerance, DC resistance, Q factor, self-resonant frequency) and mounting requirements (through-hole axial). However, three differences require application-level verification: (1) SC301R0KT is shielded while ER1025-20KM is unshielded—shielding may affect circuit performance in sensitive applications; (2) SC301R0KT operates to 100°C maximum versus 105°C for ER1025-20KM; (3) physical dimensions differ, requiring PCB layout confirmation.

Q: What is the significance of the shielding difference?

A: ER1025-20KM is unshielded, allowing magnetic field radiation. SC301R0KT is shielded, containing the magnetic field. In applications where external magnetic fields must not interfere with circuit operation, or where the inductor must not radiate interference to adjacent components, shielding is beneficial. In applications where shielding is unnecessary or where the larger shielded package cannot fit, the unshielded ER1025-20KM is appropriate.

Q: Are there packaging format compatibility issues?

A: ER1025-20KM is supplied in Tape & Reel (TR) format, standard for high-volume automated assembly. SC301R0KT is supplied in Cut Tape (CT) format, suitable for lower-volume or manual assembly operations. Assembly equipment compatibility must be verified before substitution.

Q: How do the current ratings affect substitution?

A: SC301R0KT has a 420 mA current rating versus 385 mA for ER1025-20KM. This 35 mA difference means SC301R0KT can handle higher current loads without saturation. If the application requires exactly 385 mA or less, both parts are suitable. If the application requires higher current capacity, SC301R0KT provides additional margin.

Q: What compliance differences exist between these parts?

A: ER1025-20KM is RoHS non-compliant. SC301R0KT is ROHS3 compliant. Applications subject to RoHS regulations (primarily EU and similar jurisdictions) require ROHS3-compliant components. Applications without such regulatory requirements may use either part.

Q: Can physical size differences affect circuit performance?

A: ER1025-20KM measures 0.095" diameter × 0.250" length. SC301R0KT measures 0.165" diameter × 0.394" length. The larger SC301R0KT may not fit in space-constrained PCB layouts designed for the smaller ER1025-20KM. PCB artwork and mechanical clearance must be verified before substitution.