PM3340-470M Equivalent & Substitute Parts

Part Overview

The PM3340-470M is a 47 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.6 A continuous current with a maximum DC resistance of 100 mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The PM3340-470M operates across a temperature range of -55°C to 105°C and is RoHS non-compliant. Due to its obsolete status, direct replacements from active product lines are required to maintain supply chain continuity while meeting modern compliance standards.

Key Parameters

Parameter	Value
Inductance	47 µH
Inductance Tolerance	±20%
Current Rating	1.6 A
Current - Saturation (Isat)	3.8 A
DC Resistance (DCR)	100 mOhm Max
Shielding	Unshielded
Core Type	Drum Core, Wirewound
Core Material	Ferrite
Operating Temperature	-55°C to 105°C
Mounting Type	Surface Mount
Inductance Test Frequency	100 kHz
RoHS Status	Non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PM3340-470M is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 47 µH ±20%
Inductance tolerance: ±20%
Mounting type: Surface Mount
MSL rating: 1 (Unlimited)

Secondary Compatibility Factors:

Current rating: Must meet or exceed 1.6 A
DC resistance: Lower or equal to 100 mOhm preferred
Operating temperature range: Must support -55°C minimum
Saturation current: Must support 3.8 A or higher

Substitute parts are grouped into two categories based on shielding configuration and core construction:

Category 1 - Unshielded Wirewound (Direct Functional Equivalents):

PF0698.473NLT (Pulse Electronics)
PF0382.473NLT (Pulse Electronics)

These parts maintain the unshielded wirewound construction of the original PM3340-470M and provide improved current ratings and lower DC resistance.

Category 2 - Shielded Drum Core (Enhanced Performance Alternatives):

B82464G4473M000 (EPCOS - TDK Electronics)
B82464P4473M000 (EPCOS - TDK Electronics)

These parts offer shielded construction with ferrite drum cores, providing electromagnetic containment benefits at the cost of reduced current ratings and different physical dimensions.

Parameter Comparison

Parameter	PM3340-470M (Main)	PF0698.473NLT	PF0382.473NLT	B82464G4473M000	B82464P4473M000
Inductance	47 µH	47 µH	47 µH	47 µH	47 µH
Tolerance	±20%	±20%	±20%	±20%	±20%
Current Rating (A)	1.6	2.45	2.7	1.55	1.55
Isat (A)	3.8	3.8	3.8	1.8	1.8
DC Resistance (mOhm Max)	100	85	90	95	95
Shielding	Unshielded	Unshielded	Unshielded	Shielded	Shielded
Core Type	Drum Core, Wirewound	Wirewound	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Core Material	Ferrite	Not specified	Not specified	Ferrite	Ferrite
Operating Temperature (°C)	-55 to 105	-40 to 125	-40 to 125	-55 to 150	-55 to 150
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q200 Rated	No	No	No	Yes	Yes
MSL Rating	1	1	1	1	1

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: All substitute parts (PF0698.473NLT, PF0382.473NLT, B82464G4473M000, B82464P4473M000) are ROHS3 compliant, addressing the non-compliance status of the obsolete PM3340-470M.

For Unshielded Configurations: PF0698.473NLT and PF0382.473NLT maintain the unshielded wirewound construction of the original part. Both offer superior current ratings (2.45 A and 2.7 A respectively) and lower DC resistance (85 mOhm and 90 mOhm) compared to the PM3340-470M. These parts are suitable for applications where electromagnetic shielding is not required and higher current capacity is beneficial.

For Shielded Configurations with Automotive Qualification: B82464G4473M000 and B82464P4473M000 provide AEC-Q200 automotive qualification and shielded ferrite drum core construction. These parts are appropriate for applications requiring electromagnetic containment and automotive-grade reliability. Note that saturation current is reduced to 1.8 A, which may limit use in high-current transient conditions.

For Extended Temperature Range: B82464G4473M000, B82464P4473M000, PF0698.473NLT, and PF0382.473NLT all support operating temperatures up to 125°C or 150°C, exceeding the PM3340-470M maximum of 105°C.

Frequently Asked Questions (FAQ)

Q: Can PF0698.473NLT or PF0382.473NLT be used as direct drop-in replacements for PM3340-470M?

A: Both Pulse Electronics parts maintain the same 47 µH inductance, ±20% tolerance, unshielded construction, and surface mount configuration. Physical dimensions are similar (0.510" L x 0.370" W vs. 0.512" L x 0.402" W for the original). Both provide higher current ratings and lower DC resistance, making them functionally superior. Verify PCB layout clearances due to minor dimensional differences.

Q: What is the difference between the two Pulse Electronics substitutes?

A: PF0698.473NLT and PF0382.473NLT differ primarily in current rating (2.45 A vs. 2.7 A) and DC resistance (85 mOhm vs. 90 mOhm). Both share identical physical dimensions and operating temperature range. Selection depends on application current requirements.

Q: Why do the EPCOS B82464 parts have lower saturation current (1.8 A vs. 3.8 A)?

A: The B82464 series uses shielded ferrite drum core construction, which provides electromagnetic containment but results in different magnetic characteristics. The 1.8 A saturation current is specific to this core design. These parts are suitable only for applications where saturation current of 1.8 A or higher is acceptable.

Q: Are the EPCOS B82464G4473M000 and B82464P4473M000 interchangeable?

A: Both parts share identical electrical specifications (47 µH, 1.55 A, 95 mOhm DCR, ±20% tolerance) and physical dimensions. Both are AEC-Q200 qualified and ROHS3 compliant. The primary difference is packaging (Tape & Reel for both) and HTSUS classification. They are functionally interchangeable.

Q: What are the physical dimension constraints when substituting?

A: The PM3340-470M measures 0.512" L x 0.402" W x 0.453" H (13.00mm x 10.20mm x 11.50mm). Pulse Electronics parts are 0.510" L x 0.370" W x 0.445" H (12.95mm x 9.40mm x 11.30mm). EPCOS parts are significantly smaller at 0.409" L x 0.409" W x 0.189" H (10.40mm x 10.40mm x 4.80mm). Verify PCB footprint compatibility before selection.

Q: Which substitute is recommended for new designs?

A: For new designs requiring RoHS3 compliance and active product support, PF0698.473NLT or PF0382.473NLT are recommended for unshielded applications. For automotive applications or designs requiring electromagnetic shielding, B82464G4473M000 or B82464P4473M000 with AEC-Q200 qualification are appropriate. All substitutes are active products with established supply chains.

Q: Is temperature range compatibility a concern?

A: The PM3340-470M operates to 105°C maximum. All substitute parts support at least 125°C, with EPCOS parts rated to 150°C. If the original design operated near 105°C, substitutes provide additional thermal margin. Verify that the lower minimum temperature of Pulse Electronics parts (-40°C vs. -55°C) is acceptable for your application.

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