SLF7032T-330MR75-2 Equivalent & Substitute Parts

Part Overview

The SLF7032T-330MR75-2 is a 33 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 750 mA continuous current with a maximum DC resistance of 192mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part operates across the temperature range of -40°C to 105°C and is mounted as a surface mount device in a nonstandard 7.00mm x 7.00mm package footprint.

Key Parameters

Parameter	Value
Inductance	33 µH
Inductance Tolerance	±20%
Current Rating	750 mA
DC Resistance (DCR)	192mOhm Max
Core Type	Ferrite Drum Core
Shielding	Shielded
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Surface Mount
Package Footprint	7.00mm x 7.00mm
Height (Seated Max)	3.40mm

Substitute Part Grouping Explanation

Substitution eligibility for the SLF7032T-330MR75-2 is determined by the following critical parameters:

Inductance Value: Must be 33 µH
Inductance Tolerance: ±20% or tighter
Current Rating: Minimum 750 mA continuous current capability
DC Resistance: Maximum 192mOhm or lower
Core Material: Ferrite drum core construction
Shielding: Shielded configuration required
Mounting: Surface mount technology
Package Footprint: 7.00mm x 7.00mm or compatible nonstandard equivalent
Operating Temperature: Minimum -40°C to 105°C range

All substitute parts listed below meet or exceed these electrical and mechanical parameters, ensuring functional compatibility in applications originally designed for the SLF7032T-330MR75-2.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating	DCR (Max)	Core Type	Footprint	Height (Max)	Operating Temp	Product Status	RoHS Status
SLF7032T-330MR75-2	TDK Corporation	33 µH	±20%	750 mA	192mOhm	Ferrite Drum Core	7.00mm x 7.00mm	3.40mm	-40°C ~ 105°C	Obsolete	RoHS Non-Compliant
SLF7032T-330MR75-2PF	TDK Corporation	33 µH	±20%	750 mA	192mOhm	Ferrite Drum Core	7.00mm x 7.00mm	3.40mm	-40°C ~ 105°C	Not For New Designs	ROHS3 Compliant
SRR7032-330M	Bourns Inc.	33 µH	±20%	760 mA	200mOhm	Ferrite Drum Core	7.00mm x 7.00mm	3.40mm	-40°C ~ 125°C	Active	ROHS3 Compliant
P1166.333NLT	Pulse Electronics	33 µH	±20%	940 mA	205mOhm	Wirewound	7.54mm x 7.54mm	4.61mm	-40°C ~ 130°C	Active	ROHS3 Compliant
DR73-330-R	Eaton - Electronics Division	33 µH	±20%	1.31 A	166mOhm	Ferrite Drum Core	7.60mm x 7.60mm	4.65mm	-40°C ~ 125°C	Active	ROHS3 Compliant
SRR0805-330Y	Bourns Inc.	33 µH	±15%	920 mA	240mOhm	Ferrite Drum Core	10.50mm x 8.00mm	4.70mm	-40°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): SLF7032T-330MR75-2PF is the direct equivalent from TDK Corporation with identical electrical specifications and footprint. This part is ROHS3 compliant and suitable for new designs, addressing the obsolescence of the original part while maintaining full compatibility.

Primary Active Alternatives (Recommended for New Designs): SRR7032-330M from Bourns Inc. provides identical footprint dimensions and electrical performance with slightly improved current rating (760 mA vs. 750 mA) and lower DCR (200mOhm vs. 192mOhm). This part is active and ROHS3 compliant.

DR73-330-R from Eaton Electronics offers superior current handling (1.31 A) and the lowest DCR (166mOhm) among all substitutes, with a marginally larger footprint (7.60mm x 7.60mm). This part is active and ROHS3 compliant.

Secondary Alternatives (Conditional Use): P1166.333NLT from Pulse Electronics provides the highest current rating (940 mA) and extended temperature range (-40°C to 130°C). Footprint is slightly larger (7.54mm x 7.54mm). This part is active and ROHS3 compliant.

SRR0805-330Y from Bourns Inc. features tighter inductance tolerance (±15%) and higher current saturation (1.2A). The footprint is significantly larger (10.50mm x 8.00mm) and height is increased (4.70mm), requiring PCB layout verification before selection.

All recommended substitutes are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SLF7032T-330MR75-2PF be used as a direct replacement for SLF7032T-330MR75-2? A: Yes. SLF7032T-330MR75-2PF is the direct equivalent with identical electrical specifications (33 µH, 750 mA, 192mOhm DCR) and footprint (7.00mm x 7.00mm). The primary difference is packaging format (Cut Tape & Digi-Reel vs. standard) and improved RoHS compliance status.

Q: What is the key difference between SRR7032-330M and the original part? A: SRR7032-330M maintains identical footprint and inductance specifications but is manufactured by Bourns Inc. instead of TDK. It offers marginally higher current rating (760 mA vs. 750 mA) and is active with ROHS3 compliance, making it suitable for new production designs.

Q: Can I use DR73-330-R if my PCB layout has limited space? A: DR73-330-R has a slightly larger footprint (7.60mm x 7.60mm vs. 7.00mm x 7.00mm) and height (4.65mm vs. 3.40mm). Verify PCB clearances before selection. However, it offers superior electrical performance with lower DCR (166mOhm) and higher current rating (1.31 A).

Q: Is SRR0805-330Y compatible with the original design? A: SRR0805-330Y meets all electrical requirements but has a significantly larger footprint (10.50mm x 8.00mm) and height (4.70mm). PCB layout redesign is required. Use this part only if space constraints are not critical and the improved tolerance (±15%) is beneficial.

Q: Which substitute offers the best long-term availability? A: SRR7032-330M, DR73-330-R, and P1166.333NLT all carry active product status with ROHS3 compliance, ensuring stable supply chains. SLF7032T-330MR75-2PF is marked "Not For New Designs" and should be avoided for new production.

Q: What is the temperature operating range difference between substitutes? A: The original part operates -40°C to 105°C. Most substitutes extend this to -40°C to 125°C. P1166.333NLT offers the widest range at -40°C to 130°C. Verify application requirements before selecting based on temperature range alone.

Q: Can I interchange these parts without circuit redesign? A: SLF7032T-330MR75-2PF and SRR7032-330M are direct footprint equivalents requiring no PCB changes. DR73-330-R and P1166.333NLT have slightly larger footprints but remain compatible with minor spacing verification. SRR0805-330Y requires PCB layout redesign due to significantly larger dimensions.

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