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PM3340-470M-RC Equivalent & Substitute Parts
Part Overview
The PM3340-470M-RC 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 part operates across an industrial temperature range of -55°C to 105°C and is fully RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level). Surface mount packaging and nonstandard form factor are key characteristics for integration into compact circuit designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 47 µH |
| Tolerance | ±20% |
| Current Rating | 1.6 A |
| Current - Saturation (Isat) | 3.8 A |
| DC Resistance (DCR) | 100 mOhm Max |
| Shielding | Unshielded |
| Core Material | Ferrite |
| Mounting Type | Surface Mount |
| Operating Temperature | -55°C to 105°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the PM3340-470M-RC is determined by the following critical parameters:
- Inductance Value: Must be 47 µH ±20%
- Current Rating: Must support minimum 1.6 A continuous current
- DC Resistance: Must not exceed 100 mOhm to maintain thermal performance
- Saturation Current: Must be ≥3.8 A for circuit protection margin
- Shielding Configuration: Unshielded topology preferred to match original design
- Mounting Type: Surface mount only
- RoHS Compliance: ROHS3 required for regulatory alignment
Parts are classified as Direct Substitutes when all critical parameters are met or exceeded. Parts are classified as Similar when one or more parameters deviate but remain functionally compatible within the specified tolerance band.
Parameter Comparison
| Parameter | PM3340-470M-RC (Main) | PF0382.473NLT | PF0698.473NLT | B82464P4473M000 | B82476A1473M000 | B82476B1473M100 |
|---|---|---|---|---|---|---|
| Manufacturer | Bourns Inc. | Pulse Electronics | Pulse Electronics | EPCOS - TDK Electronics | EPCOS - TDK Electronics | EPCOS - TDK Electronics |
| Inductance | 47 µH | 47 µH | 47 µH | 47 µH | 47 µH | 47 µH |
| Tolerance | ±20% | ±20% | ±20% | ±20% | ±20% | ±20% |
| Current Rating (A) | 1.6 | 2.7 | 2.45 | 1.55 | 1.8 | 1.95 |
| Isat (A) | 3.8 | 3.8 | 3.8 | 1.8 | 1.6 | 1.6 |
| DCR (mOhm Max) | 100 | 90 | 85 | 95 | 120 | 120 |
| Shielding | Unshielded | Unshielded | Unshielded | Shielded | Unshielded | Unshielded |
| Core Type | Drum Core, Wirewound | Wirewound | Wirewound | Drum Core, Wirewound | Drum Core, Wirewound | Drum Core, Wirewound |
| Operating Temperature | -55°C to 105°C | -40°C to 125°C | -40°C to 125°C | -55°C to 150°C | -55°C to 150°C | -55°C to 150°C |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Packaging | Nonstandard | Nonstandard | Nonstandard | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) |
Engineering Selection Recommendations
Direct Substitutes (Preferred)
PF0382.473NLT and PF0698.473NLT from Pulse Electronics are direct substitutes. Both parts exceed the current rating requirement (2.7 A and 2.45 A respectively versus 1.6 A), maintain saturation current at 3.8 A, and feature lower DC resistance (90 mOhm and 85 mOhm respectively). Both are active products with extended operating temperature ranges (-40°C to 125°C) and full RoHS3 compliance. These parts provide superior thermal performance and long-term availability.
Similar Substitutes (Conditional)
B82476B1473M100 from EPCOS - TDK Electronics is a similar substitute with active product status and AEC-Q200 automotive qualification. It meets the current rating requirement (1.95 A) and maintains saturation current at 1.6 A. However, DC resistance is elevated to 120 mOhm, representing a 20% increase over the original specification. This part is suitable for applications where automotive-grade reliability is required and thermal margin permits the higher resistance.
B82476A1473M000 is also a similar substitute with active status and extended temperature range (-55°C to 150°C). Current rating of 1.8 A exceeds the requirement, but saturation current drops to 1.6 A and DC resistance increases to 120 mOhm. This part is appropriate for high-temperature applications where the saturation current margin is acceptable.
B82464P4473M000 is a shielded variant with active status and AEC-Q200 qualification. Current rating of 1.55 A is below the original specification, and saturation current is significantly reduced to 1.8 A. This part is not recommended as a direct replacement due to insufficient current margin and shielded topology mismatch.
Frequently Asked Questions (FAQ)
Q: Can PF0382.473NLT and PF0698.473NLT be used interchangeably with PM3340-470M-RC?
A: Yes. Both Pulse Electronics parts meet or exceed all critical parameters: 47 µH inductance, current ratings of 2.7 A and 2.45 A (exceeding the 1.6 A requirement), saturation current of 3.8 A, and DC resistance below 100 mOhm. Both are active products with full RoHS3 compliance and extended temperature ranges.
Q: Why is B82464P4473M000 listed as a similar substitute rather than a direct substitute?
A: B82464P4473M000 features shielded construction, which differs from the unshielded topology of the PM3340-470M-RC. Additionally, the current rating of 1.55 A is below the original 1.6 A specification, and saturation current is reduced to 1.8 A. While the part maintains 47 µH inductance and RoHS3 compliance, the shielding configuration and reduced saturation margin make it suitable only for applications where EMI containment is prioritized over current headroom.
Q: What is the impact of increased DC resistance in B82476A1473M000 and B82476B1473M100?
A: Both parts feature 120 mOhm maximum DC resistance, a 20% increase over the 100 mOhm specification of PM3340-470M-RC. This results in proportionally higher resistive losses and heat generation at rated current. For a 1.6 A circuit, the additional power dissipation is approximately 0.154 mW. These parts are suitable for applications with adequate thermal design margin or where the extended temperature range (-55°C to 150°C) justifies the resistance trade-off.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the regulatory status of the PM3340-470M-RC.
Q: What is the significance of AEC-Q200 qualification on B82464P4473M000 and B82476B1473M100?
A: AEC-Q200 is an automotive-grade reliability standard. Parts bearing this qualification have undergone extended stress testing and are approved for automotive applications. This certification is relevant only if the end application requires automotive-grade component qualification. For general industrial or consumer applications, AEC-Q200 certification provides no functional advantage.
Q: Can the Pulse Electronics parts accommodate the full -55°C to 105°C temperature range of the original part?
A: Pulse Electronics parts are rated for -40°C to 125°C, which covers the upper portion of the original range but does not extend to -55°C. For applications requiring operation below -40°C, EPCOS - TDK Electronics parts (rated -55°C to 150°C) are required.
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