ASPI-1306S-330M-T Equivalent & Substitute Parts

Part Overview

The ASPI-1306S-330M-T is a 33 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 2.8 A continuous current with a maximum DC resistance of 75 mOhm. This component is designed for surface mount applications requiring electromagnetic shielding in compact form factors. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20%	-
Current Rating	2.8	A
DC Resistance (Max)	75	mOhm
Saturation Current	5	A
Core Material	Ferrite	-
Shielding	Shielded	-
Operating Temperature Range	-40°C to 85°C	-
Package Type	Nonstandard	-
Physical Dimensions	18.54 × 15.24 × 7.62 mm	L × W × H
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-1306S-330M-T is determined by the following critical parameters:

Inductance value: 33 µH (within ±20% tolerance band)
Current rating: minimum 2.8 A continuous
DC resistance: maximum 75 mOhm
Core material: Ferrite drum core wirewound construction
Mounting: Surface mount, nonstandard package
Physical footprint: 18.54 × 15.24 mm base dimensions
Compliance: RoHS3 and REACH requirements

The substitute part B82479A1333M000 meets the inductance, core material, mounting type, and physical footprint requirements. Differences in shielding configuration, current rating, DC resistance, and operating temperature range are documented in the parameter comparison table below.

Parameter Comparison

Parameter	ASPI-1306S-330M-T (Main)	B82479A1333M000 (Substitute)	Compatibility Notes
Manufacturer	Abracon LLC	EPCOS - TDK Electronics	Different manufacturers
Inductance	33 µH	33 µH	Identical
Inductance Tolerance	±20%	±20%	Identical
Current Rating	2.8 A	3 A	Substitute rated higher
Saturation Current	5 A	5.5 A	Substitute rated higher
DC Resistance (Max)	75 mOhm	66 mOhm	Substitute has lower resistance
Shielding	Shielded	Unshielded	Different shielding configuration
Core Material	Ferrite	Ferrite	Identical
Operating Temperature	-40°C to 85°C	-55°C to 150°C	Substitute has wider range
Physical Dimensions (L × W)	18.54 × 15.24 mm	18.54 × 15.24 mm	Identical footprint
Height (Max)	7.62 mm	7.11 mm	Substitute is 0.51 mm shorter
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical

Engineering Selection Recommendations

Both the ASPI-1306S-330M-T and B82479A1333M000 are active production components with full RoHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

The primary distinction between these parts is the shielding configuration. The main part features shielded construction, while the substitute is unshielded. This difference is significant in applications where electromagnetic interference mitigation is required. Selection between these parts depends on whether EMI shielding is a functional requirement of the circuit design.

The substitute part offers improved electrical performance in terms of current rating (3 A versus 2.8 A), lower DC resistance (66 mOhm versus 75 mOhm maximum), and higher saturation current (5.5 A versus 5 A). The substitute also provides a wider operating temperature range (-55°C to 150°C versus -40°C to 85°C). Physical compatibility is maintained with identical footprint dimensions, though the substitute is 0.51 mm shorter in seated height.

Frequently Asked Questions (FAQ)

Q: Can B82479A1333M000 be used as a direct replacement for ASPI-1306S-330M-T?

A: Direct replacement is possible only if EMI shielding is not a circuit requirement. Both parts share identical inductance values, tolerances, core material, footprint, and compliance certifications. The substitute offers superior current handling and lower DC resistance. Height difference is 0.51 mm, which may affect PCB layout in space-constrained designs.

Q: What is the impact of the unshielded design of the substitute part?

A: The unshielded configuration of B82479A1333M000 may allow increased electromagnetic field radiation and susceptibility to external interference compared to the shielded ASPI-1306S-330M-T. Applications requiring isolation from or protection against EMI should retain the shielded main part.

Q: Are there compatibility concerns with the 0.51 mm height difference?

A: The substitute part is shorter (7.11 mm versus 7.62 mm seated height). This difference is generally accommodated in standard PCB assembly processes but should be verified against specific board clearance and component placement constraints.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both ASPI-1306S-330M-T and B82479A1333M000 are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are suitable for equivalent regulatory environments.

Q: What are the advantages of the substitute part's lower DC resistance?

A: The 66 mOhm maximum DC resistance of B82479A1333M000 compared to 75 mOhm of the main part results in lower resistive losses and reduced heat generation at equivalent current levels, improving efficiency in power delivery applications.

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