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Equivalent & Substitute Parts for 9250-394-RC
Part Overview
The Bourns 9250-394-RC is a 390 µH shielded drum core wirewound inductor rated for 105 mA with a maximum DC resistance of 7.4 Ohm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance with ferrite core shielding. The 9250-394-RC is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 390 µH |
| Inductance Tolerance | ±10% |
| Current Rating | 105 mA |
| DC Resistance (Max) | 7.4 Ohm |
| Core Material | Ferrite |
| Shielding | Shielded |
| Q Factor @ 790 kHz | 60 |
| Self Resonant Frequency | 6.2 MHz |
| Mounting Type | Through Hole |
| Package | Axial |
| Size | 0.162" Dia x 0.410" L (4.11mm x 10.41mm) |
| Operating Temperature Range | -55°C to 105°C |
Substitute Part Grouping Explanation
Substitution for the 9250-394-RC is determined by strict equivalence across the following critical parameters:
- Inductance value: 390 µH with ±10% tolerance
- Current rating: 105 mA minimum
- DC resistance: 7.4 Ohm maximum
- Core material: Ferrite with shielding
- Frequency characteristics: Q factor of 60 @ 790 kHz and self-resonant frequency of 6.2 MHz
- Physical form factor: Axial through-hole mounting with identical dimensions (0.162" Dia x 0.410" L)
Substitute parts are grouped into two categories: direct manufacturer equivalents from Bourns Inc. and functionally equivalent alternatives from API Delevan Inc. All listed substitutes maintain identical electrical specifications and physical dimensions, ensuring pin-compatible replacement in existing circuit designs.
Parameter Comparison
| Part Number | Manufacturer | Type | Inductance | Current Rating | DCR (Max) | Q @ 790 kHz | SRF | Operating Temp | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|
| 9250-394-RC | Bourns Inc. | Drum Core, Wirewound | 390 µH | 105 mA | 7.4 Ohm | 60 | 6.2 MHz | -55°C to 105°C | Obsolete | Bulk |
| 9250A-394-RC | Bourns Inc. | Molded | 390 µH | 105 mA | 7.4 Ohm | 60 | 6.2 MHz | -55°C to 125°C | Active | Bulk |
| ER1641-394KM | API Delevan Inc. | Molded | 390 µH | 105 mA | 7.4 Ohm | 60 | 6.2 MHz | -55°C to 105°C | Active | Tape & Reel (TR) |
| ER1641-394KP | API Delevan Inc. | Molded | 390 µH | 105 mA | 7.4 Ohm | 60 | 6.2 MHz | -55°C to 105°C | Active | Tape & Reel (TR) |
| ER1641-394KR | API Delevan Inc. | Molded | 390 µH | 105 mA | 7.4 Ohm | 60 | 6.2 MHz | -55°C to 105°C | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Recommendation: 9250A-394-RC (Bourns Inc.)
The 9250A-394-RC is the direct successor to the obsolete 9250-394-RC. Both are manufactured by Bourns Inc. and maintain identical electrical specifications. The 9250A-394-RC offers an extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) and is classified as active product status, ensuring long-term availability and supply chain continuity. This part is ROHS3 compliant and carries REACH unaffected status.
Secondary Recommendations: ER1641-394KM, ER1641-394KP, ER1641-394KR (API Delevan Inc.)
The ER1641 series from API Delevan Inc. provides functionally equivalent substitutes with identical electrical performance and physical dimensions. These parts are available in tape and reel packaging and maintain active product status. However, these alternatives are RoHS non-compliant. Selection of API Delevan parts is appropriate when tape and reel packaging is required for automated assembly processes or when RoHS compliance is not a design constraint.
Frequently Asked Questions (FAQ)
Q: Can the 9250A-394-RC directly replace the obsolete 9250-394-RC?
A: Yes. The 9250A-394-RC is electrically and mechanically identical to the 9250-394-RC. Both parts share the same inductance (390 µH), current rating (105 mA), DC resistance (7.4 Ohm max), and physical dimensions (0.162" Dia x 0.410" L). The 9250A-394-RC offers an extended operating temperature range and active product status.
Q: What is the difference between Bourns and API Delevan substitutes?
A: Bourns 9250A-394-RC and API Delevan ER1641 series parts are electrically equivalent. The primary differences are manufacturer, packaging format (bulk versus tape and reel), and RoHS compliance status. Bourns parts are ROHS3 compliant; API Delevan parts are RoHS non-compliant.
Q: Are the ER1641-394KM, ER1641-394KP, and ER1641-394KR parts interchangeable?
A: Yes. All three ER1641 variants maintain identical electrical specifications and physical dimensions. The suffix designations (KM, KP, KR) represent different packaging or lead configurations from API Delevan but do not affect electrical performance or mechanical compatibility in through-hole applications.
Q: Does packaging format affect electrical performance?
A: No. Bulk and tape and reel packaging formats do not alter the electrical characteristics of the inductor. Packaging selection is determined by assembly process requirements. Tape and reel format is standard for automated pick-and-place assembly; bulk packaging is suitable for manual or semi-automated insertion.
Q: What compliance certifications apply to these substitutes?
A: The Bourns 9250A-394-RC is ROHS3 compliant and REACH unaffected. The API Delevan ER1641 series parts are RoHS non-compliant and REACH unaffected. Design requirements for regulatory compliance should guide part selection between these alternatives.
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