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Bourns 6000-681K Equivalent & Substitute Parts
Part Overview
The Bourns 6000-681K is a 680 µH unshielded drum core wirewound inductor rated for 590 mA with a maximum DC resistance of 1.6Ω. This through-hole radial component operates across -55°C to 105°C and features ferrite core construction with ±10% inductance tolerance. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 680 µH |
| Current Rating | 590 mA |
| DC Resistance (Max) | 1.6Ω |
| Tolerance | ±10% |
| Core Material | Ferrite |
| Shielding | Unshielded |
| Mounting Type | Through Hole |
| Package Type | Radial, Vertical Cylinder |
| Operating Temperature | -55°C to 105°C |
| Q @ Frequency | 20 @ 796 kHz |
| Self Resonant Frequency | 1.6 MHz |
| Physical Diameter | 0.354" (9.00 mm) |
| Physical Height | 0.480" (12.20 mm) |
Substitute Part Grouping Explanation
Substitution for the 6000-681K is determined by electrical and mechanical parameter equivalence within the 6000 series family. The primary substitute, 6000-681K-RC, maintains identical electrical specifications: 680 µH inductance, 590 mA current rating, 1.6Ω maximum DC resistance, ±10% tolerance, and ferrite unshielded drum core construction. Both parts share identical physical dimensions (0.354" diameter, 0.480" height), mounting configuration (through-hole radial), and operating temperature range (-55°C to 105°C).
The substitution relationship is based on these critical parameters:
- Inductance value and tolerance
- Current rating and DC resistance
- Core type and shielding configuration
- Physical form factor and mounting type
- Thermal operating range
Parameter Comparison
| Parameter | 6000-681K | 6000-681K-RC |
|---|---|---|
| Manufacturer | Bourns Inc. | Bourns Inc. |
| Inductance | 680 µH | 680 µH |
| Tolerance | ±10% | ±10% |
| Current Rating | 590 mA | 590 mA |
| DC Resistance (Max) | 1.6Ω | 1.6Ω |
| Core Material | Ferrite | Ferrite |
| Shielding | Unshielded | Unshielded |
| Q @ Frequency | 20 @ 796 kHz | 20 @ 796 kHz |
| Self Resonant Frequency | 1.6 MHz | 1.6 MHz |
| Operating Temperature | -55°C to 105°C | -55°C to 105°C |
| Mounting Type | Through Hole | Through Hole |
| Package Type | Radial, Vertical Cylinder | Radial, Vertical Cylinder |
| Physical Diameter | 0.354" (9.00 mm) | 0.354" (9.00 mm) |
| Physical Height | 0.480" (12.20 mm) | 0.480" (12.20 mm) |
| Product Status | Obsolete | Not For New Designs |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The 6000-681K-RC serves as the direct electrical and mechanical equivalent to the obsolete 6000-681K. Both parts are manufactured by Bourns Inc. within the 6000 series and provide identical performance across all specified electrical parameters and physical dimensions.
The 6000-681K-RC offers improved compliance status: it is ROHS3 compliant, whereas the original 6000-681K is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the 6000-681K-RC is the appropriate selection. Both parts maintain REACH unaffected status and EAR99 export classification.
The 6000-681K-RC is designated "Not For New Designs," indicating it remains available for replacement and maintenance purposes but is not recommended for new product development. For new designs requiring 680 µH inductance at 590 mA with equivalent specifications, consult current Bourns inductor offerings within the 6000 series or equivalent product lines.
Frequently Asked Questions (FAQ)
Q: Can the 6000-681K-RC directly replace the 6000-681K in existing circuits?
A: Yes. The 6000-681K-RC is electrically and mechanically equivalent. All electrical parameters (inductance, current rating, DC resistance, Q factor, self-resonant frequency) and physical dimensions are identical. Through-hole mounting configuration and radial vertical cylinder package type are unchanged.
Q: What is the difference between these two parts?
A: The primary differences are product status and RoHS compliance. The 6000-681K is obsolete and RoHS non-compliant. The 6000-681K-RC is not recommended for new designs but is ROHS3 compliant. Electrical performance and physical form factor are identical.
Q: Are there packaging differences between 6000-681K and 6000-681K-RC?
A: The original 6000-681K uses standard packaging, while the 6000-681K-RC is supplied in bulk packaging. Both maintain identical component specifications and physical dimensions. Packaging format does not affect electrical or mechanical compatibility.
Q: What are the critical parameters for substitution?
A: Substitution is valid when the following parameters match: inductance value (680 µH), tolerance (±10%), current rating (590 mA), DC resistance (1.6Ω maximum), core material (ferrite), shielding type (unshielded), mounting configuration (through-hole radial), and physical dimensions (0.354" diameter, 0.480" height).
Q: Is the 6000-681K-RC suitable for new product designs?
A: No. The 6000-681K-RC is designated "Not For New Designs." For new applications requiring 680 µH inductance at 590 mA, consult current Bourns inductor product lines or equivalent manufacturers for active alternatives.
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