Equivalent & Substitute Parts for 4426R-1

Part Overview

The 4426R-1 is a 2.5 nH unshielded wirewound inductor manufactured by API Delevan Inc., rated for 3 A continuous current. This surface mount component operates across the temperature range of -55°C to 125°C and is designed for high-frequency applications with a self-resonant frequency of 3 GHz. The part is active in production and ROHS3 compliant. Substitute parts are identified to provide alternatives for procurement flexibility, inventory management, or application-specific performance requirements while maintaining core electrical and mechanical compatibility.

Substiute Parts

4426R-1

API Delevan Inc.In Stock: 10824426R-1 Datasheet

Current PartRFQ

744913025

Würth ElektronikIn Stock: 904744913025 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4426R-1 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 2.5 nH
• Core material: Air
• Shielding type: Unshielded
• Mounting type: Surface Mount
• Physical dimensions: 3.68 mm L × 3.05 mm W × 3.18 mm H (max seated height)
• Package type: Nonstandard
• Frequency test point: 150 MHz

Allowable Variation Parameters:

• Current rating: Equal to or greater than 3 A
• Inductance tolerance: ±10% or tighter
• Operating temperature range: Must encompass or exceed -55°C to 125°C
• Q factor @ 150 MHz: Performance reference only
• Self-resonant frequency: Performance reference only
• Product status: Active production required
• Compliance: ROHS3 and REACH status alignment

The substitute part 744913025 (Würth Elektronik WE-CAIR series) meets all mandatory matching parameters and exceeds performance in current rating (4 A vs. 3 A) and inductance tolerance (±5% vs. ±10%).

Parameter Comparison

Engineering Selection Recommendations

Primary Part: 4426R-1 (API Delevan Inc.)

Selection criteria: Use as primary choice when the full operating temperature range of -55°C to 125°C is required. The part is active in production with established supply chain availability (1006 pcs in stock). ROHS3 compliance and unlimited moisture sensitivity rating support broad application deployment.

Substitute Part: 744913025 (Würth Elektronik WE-CAIR Series)

Selection criteria: Use as substitute when higher current margin is required (4 A vs. 3 A rating) or when tighter inductance tolerance (±5%) is specified in circuit design. The substitute part maintains identical physical footprint and electrical inductance value. Operating temperature range is -40°C to 125°C; use only in applications where -55°C minimum temperature is not required. AEC-Q200 automotive qualification is available on the substitute part. Supply availability is confirmed (888 pcs in stock).

Compliance Alignment: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating. Both are active production parts suitable for new design implementation.

Frequently Asked Questions (FAQ)

Q: Can 744913025 replace 4426R-1 in all applications?

A: The 744913025 is electrically and mechanically compatible with the 4426R-1 for applications operating within the temperature range of -40°C to 125°C. If your circuit requires operation at -55°C, the 4426R-1 must be used. Both parts have identical inductance (2.5 nH), physical dimensions (3.68 × 3.05 × 3.18 mm), and mounting type (surface mount, nonstandard package).

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Current rating: 744913025 is rated for 4 A versus 3 A for 4426R-1; (2) Inductance tolerance: 744913025 has ±5% tolerance versus ±10% for 4426R-1; (3) DC resistance: 744913025 specifies 1.1 mOhm maximum, while 4426R-1 does not specify this parameter; (4) Self-resonant frequency: 744913025 is 12.5 GHz versus 3 GHz for 4426R-1; (5) Operating temperature minimum: 744913025 is -40°C versus -55°C for 4426R-1; (6) Automotive qualification: 744913025 carries AEC-Q200 rating.

Q: Are the physical packages identical?

A: Yes. Both parts use a nonstandard surface mount package with identical dimensions of 3.68 mm length × 3.05 mm width and maximum seated height of 3.18 mm. Both are supplied in Tape & Reel (TR) packaging. PCB footprint and assembly handling are identical.

Q: Which part should I select for new designs?

A: For new designs, evaluate your specific temperature requirements. If operation below -40°C is not required, the 744913025 offers advantages in current margin (4 A vs. 3 A), tighter tolerance (±5%), and automotive qualification (AEC-Q200). If full -55°C to 125°C range is mandatory, use the 4426R-1.

Q: Can I use these parts interchangeably in existing designs?

A: Interchangeability depends on your circuit's temperature operating range and current requirements. If your design operates within -40°C to 125°C and current draw does not exceed 3 A, either part is suitable. If current approaches or exceeds 3 A, the 744913025 (4 A rating) provides additional margin. Verify temperature requirements before substitution.

Q: What is the significance of the Q factor difference (145 vs. 140)?

A: Both parts are measured at 150 MHz. The Q factor difference of 5 points (145 for 4426R-1 vs. 140 for 744913025) represents approximately 3.4% variation and is within normal manufacturing tolerance for wirewound inductors. This difference is negligible for most RF and high-frequency circuit applications.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both 4426R-1 and 744913025 are ROHS3 compliant and REACH unaffected. Both carry MSL 1 (unlimited) moisture sensitivity rating, allowing storage without desiccant requirements.