3483R-471M Equivalent & Substitute Parts

Part Overview

The 3483R-471M is a 470 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 220 mA continuous current with a maximum DC resistance of 2.6 Ohm. This surface mount component operates across the temperature range of -20°C to 85°C and is classified as an active product. The part is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture tolerance.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit alternative electrical or mechanical characteristics within acceptable tolerance bands. The following substitute maintains the core inductance value and ferrite core material while accommodating variations in current rating, DC resistance, shielding configuration, and operating temperature range.

Key Parameters

Parameter	Value	Unit
Inductance	470	µH
Inductance Tolerance	±20%	-
Current Rating	220	mA
DC Resistance (Max)	2.6	Ohm
Core Material	Ferrite	-
Shielding	Unshielded	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-20°C to 85°C	-
RoHS Status	ROHS3 Compliant	-
MSL Rating	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the 3483R-471M is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 470 µH (fixed requirement)
Inductance tolerance: ±20% (fixed requirement)
Core material: Ferrite (fixed requirement)
Mounting type: Surface Mount (fixed requirement)
Test frequency: 100 kHz (fixed requirement)

Allowable Variation Parameters:

Current rating: Substitute must equal or exceed 220 mA minimum
DC resistance: Substitute must not exceed 2.6 Ohm maximum
Shielding: Unshielded or shielded configurations are interchangeable based on EMI requirements
Operating temperature: Substitute range may extend beyond -20°C to 85°C
Package dimensions: Minor variations acceptable within SMD form factor constraints
Product status: Active or Not For New Designs both acceptable for equivalent substitution

The substitute part SLF7032T-471MR20-2PF meets all primary matching criteria and operates within allowable variation parameters, with the exception of current rating (200 mA vs. 220 mA) and shielding configuration (shielded vs. unshielded).

Parameter Comparison

Parameter	3483R-471M (API Delevan)	SLF7032T-471MR20-2PF (TDK)	Compatibility
Inductance	470 µH	470 µH	Matched
Inductance Tolerance	±20%	±20%	Matched
Current Rating	220 mA	200 mA	Substitute rated 10% lower
DC Resistance (Max)	2.6 Ohm	2.46 Ohm	Substitute lower (favorable)
Core Material	Ferrite	Ferrite	Matched
Shielding	Unshielded	Shielded	Different configuration
Operating Temperature	-20°C to 85°C	-40°C to 105°C	Substitute range wider (favorable)
Mounting Type	Surface Mount	Surface Mount	Matched
Package / Case	2-SMD	Nonstandard	Different designation
Size / Dimension	7.20mm x 7.20mm	7.00mm x 7.00mm	Substitute 2.8% smaller
Height (Max)	3.50mm	3.40mm	Substitute 2.9% lower
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
MSL Rating	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Active	Not For New Designs	Different status

Engineering Selection Recommendations

For Active Product Requirement: The 3483R-471M maintains active product status with API Delevan Inc., ensuring continued manufacturer support and supply availability. Selection of this part is recommended for new designs requiring long-term component availability and manufacturer technical support.

For Substitute Selection: The SLF7032T-471MR20-2PF from TDK Corporation is classified as "Not For New Designs," indicating this part is in mature or end-of-life status. This substitute is suitable only for replacement applications, legacy system maintenance, or when supply of the primary part is unavailable.

Compliance Basis: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance. Both parts carry EAR99 ECCN classification and are REACH unaffected.

Current Rating Consideration: The substitute part carries a 200 mA current rating versus the primary part's 220 mA rating. Circuit designs operating at or near the 220 mA maximum must verify that the substitute's 200 mA rating does not violate application requirements.

Shielding Configuration: The primary part is unshielded while the substitute is shielded. Shielded configuration provides additional EMI suppression but may alter circuit behavior in sensitive applications. PCB layout and circuit performance validation is necessary when transitioning between shielded and unshielded configurations.

Frequently Asked Questions (FAQ)

Q: Can the SLF7032T-471MR20-2PF directly replace the 3483R-471M in all applications?

A: Direct replacement is possible only when circuit current requirements do not exceed 200 mA. The substitute's shielded configuration may affect circuit performance in sensitive RF or high-frequency applications. Physical dimensions differ by approximately 2.8%, requiring PCB layout verification.

Q: What is the significance of the "Not For New Designs" status on the TDK substitute?

A: This designation indicates the part is in mature or end-of-life phase. While functionally equivalent, the manufacturer does not recommend this part for new product development. Use is appropriate for legacy system repairs or temporary supply solutions only.

Q: Are the inductance values and tolerances identical between both parts?

A: Yes. Both parts specify 470 µH inductance with ±20% tolerance, tested at 100 kHz. This parameter is matched and interchangeable.

Q: How do the DC resistance values compare?

A: The primary part specifies 2.6 Ohm maximum DC resistance. The substitute specifies 2.46 Ohm maximum, which is lower and therefore favorable for power dissipation characteristics.

Q: What is the impact of the shielded versus unshielded configuration?

A: The primary part is unshielded; the substitute is shielded. Shielded inductors reduce radiated EMI but may introduce different coupling characteristics in the circuit. Applications sensitive to magnetic field coupling require performance validation when switching between configurations.

Q: Do both parts meet the same environmental compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) rating, are REACH unaffected, and hold EAR99 ECCN classification. Environmental and regulatory compliance is equivalent.

Q: What are the physical dimension differences?

A: The primary part measures 7.20mm x 7.20mm x 3.50mm (height). The substitute measures 7.00mm x 7.00mm x 3.40mm. The substitute is approximately 2.8% smaller in footprint and 2.9% lower in height. PCB layout must accommodate these dimensional variations.

Q: Is the operating temperature range difference significant?

A: The primary part operates -20°C to 85°C. The substitute operates -40°C to 105°C. The substitute's wider temperature range is favorable for applications requiring extended thermal performance, but does not restrict use in the primary part's temperature envelope.

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