S0402-27NJ3D Equivalent & Substitute Parts Reference

Part Overview

The S0402-27NJ3D is a 27 nH unshielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications in the 0402 (1005 Metric) package. This component operates at 400 mA current rating with a maximum DC resistance of 360 mOhm and is classified as Active product status. The inductor is specified for operation across -55°C to 125°C temperature range with a self-resonant frequency of 2.48 GHz.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across critical parameters including inductance value, current rating, package dimensions, and operating temperature range.

Key Parameters

Parameter	Value	Unit
Inductance	27	nH
Inductance Tolerance	±5	%
Current Rating	400	mA
DC Resistance (Max)	360	mOhm
Package / Case	0402 (1005 Metric)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55°C to 125°C	—
Shielding	Unshielded	—
Type	Drum Core, Wirewound	—

Substitute Part Grouping Explanation

Substitution eligibility for the S0402-27NJ3D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Inductance value: 27 nH
Inductance tolerance: ±5%
Current rating: 400 mA minimum
Package / Case: 0402 (1005 Metric)
Mounting type: Surface Mount
Shielding configuration: Unshielded
Component type: Drum Core, Wirewound

Compatible Variation Parameters:

DC Resistance: Substitute must not exceed 360 mOhm maximum
Operating temperature range: Substitute must cover or exceed -55°C to 125°C
Core material: May vary (Alumina or Ceramic acceptable)
Self-resonant frequency: Must be ≥2.48 GHz

The substitute part LRW0402WJ27NGG001T manufactured by Johanson Technology Inc. meets all mandatory matching parameters and operates within compatible variation limits.

Parameter Comparison

Parameter	S0402-27NJ3D (API Delevan)	LRW0402WJ27NGG001T (Johanson Technology)	Compatibility
Inductance	27 nH	27 nH	Equivalent
Inductance Tolerance	±5%	±5%	Equivalent
Current Rating	400 mA	400 mA	Equivalent
DC Resistance (Max)	360 mOhm	298 mOhm	Compatible (lower DCR)
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature Range	-55°C to 125°C	-40°C to 125°C	Compatible (narrower range)
Shielding	Unshielded	Unshielded	Equivalent
Type	Drum Core, Wirewound	Drum Core, Wirewound	Equivalent
Size / Dimension (L x W)	0.043" x 0.025" (1.09mm x 0.64mm)	0.039" x 0.022" (1.00mm x 0.55mm)	Compatible (smaller footprint)
Height - Seated (Max)	0.030" (0.76mm)	0.024" (0.60mm)	Compatible (lower profile)
Q @ Frequency	23 @ 250MHz	55 @ 900MHz	Compatible (higher Q)
Self-Resonant Frequency	2.48 GHz	2.5 GHz	Equivalent
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute offers compliance
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Primary Selection (S0402-27NJ3D): Select the S0402-27NJ3D when the application requires operation across the full temperature range of -55°C to 125°C and RoHS compliance is not a design constraint. This part is Active status with 969 pieces in stock inventory.

Substitute Selection (LRW0402WJ27NGG001T): The LRW0402WJ27NGG001T from Johanson Technology Inc. is electrically and mechanically compatible for applications where:

Operating temperature range of -40°C to 125°C is acceptable
ROHS3 compliance is required
Lower DC resistance (298 mOhm vs. 360 mOhm) provides performance benefit
Smaller physical footprint (1.00mm x 0.55mm vs. 1.09mm x 0.64mm) is advantageous
Lower profile height (0.60mm vs. 0.76mm) accommodates space constraints

Both parts are Active status. The substitute offers higher inventory availability (25,868 pieces) and improved compliance certification. Selection between these parts depends on temperature range requirements and regulatory compliance mandates specific to the application.

Frequently Asked Questions (FAQ)

Q: Can LRW0402WJ27NGG001T replace S0402-27NJ3D in all applications?

A: LRW0402WJ27NGG001T is compatible for applications operating within -40°C to 125°C. If the application requires operation below -40°C, the S0402-27NJ3D must be used. All other electrical and mechanical parameters are equivalent or superior in the substitute part.

Q: What is the difference in DC resistance between these parts?

A: S0402-27NJ3D specifies 360 mOhm maximum DC resistance. LRW0402WJ27NGG001T specifies 298 mOhm maximum. The lower resistance in the substitute part reduces power dissipation and heat generation in the inductor.

Q: Are the physical dimensions interchangeable?

A: Both parts use the 0402 (1005 Metric) package. LRW0402WJ27NGG001T has a smaller footprint (1.00mm x 0.55mm vs. 1.09mm x 0.64mm) and lower profile (0.60mm vs. 0.76mm). These dimensional differences are within the 0402 package specification and are compatible with standard 0402 PCB land patterns.

Q: What is the significance of the core material difference?

A: S0402-27NJ3D uses Alumina core material while LRW0402WJ27NGG001T uses Ceramic core material. Both materials are acceptable for unshielded drum core wirewound inductors at this inductance value and frequency range. The ceramic core in the substitute contributes to higher Q factor (55 @ 900MHz vs. 23 @ 250MHz).

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance (ROHS3 in the substitute part) addresses material composition and does not alter the electrical performance specifications. Both parts meet the same inductance, current rating, and frequency requirements.

Q: What is the moisture sensitivity level and why is it important?

A: Both parts are rated MSL 1 (Unlimited), indicating they have unlimited shelf life and require no special moisture control during storage or handling. This is the least restrictive moisture sensitivity classification.

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