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Bourns 1110-331K Equivalent & Substitute Parts
Part Overview
The Bourns 1110-331K is a 330 µH unshielded drum core wirewound inductor rated for 1.3 A with a maximum DC resistance of 336 mOhm. This through-hole component features a radial, vertical cylinder package and operates across a temperature range of -55°C to 105°C. The part is currently classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 330 µH |
| Tolerance | ±10% |
| Current Rating | 1.3 A |
| DC Resistance (Max) | 336 mOhm |
| Core Type | Ferrite, Unshielded |
| Mounting Type | Through Hole |
| Package | Radial, Vertical Cylinder |
| Operating Temperature | -55°C to 105°C |
| Size | 0.660" Dia (16.76 mm) |
| Height (Max) | 0.840" (21.34 mm) |
Substitute Part Grouping Explanation
Substitution for the 1110-331K is determined by strict equivalence across the following critical parameters:
- Inductance value: 330 µH
- Inductance tolerance: ±10%
- Current rating: minimum 1.3 A
- DC resistance: maximum 336 mOhm
- Core material and shielding: Ferrite, unshielded
- Mounting configuration: Through hole, radial vertical cylinder
- Physical dimensions: 0.660" diameter, 0.840" maximum height
- Operating temperature range: -55°C to 105°C
Parts meeting all these criteria are classified as direct equivalents. Parts with identical electrical specifications but different packaging or compliance status are classified as direct manufacturer alternatives. Parts with slightly elevated current ratings or equivalent DC resistance characteristics are classified as similar alternatives.
Parameter Comparison
| Parameter | 1110-331K (Main) | 1110-331K-RC (Direct) | IHB1BV331K (Similar) |
|---|---|---|---|
| Manufacturer | Bourns Inc. | Bourns Inc. | Vishay Dale |
| Inductance | 330 µH | 330 µH | 330 µH |
| Tolerance | ±10% | ±10% | Not specified |
| Current Rating | 1.3 A | 1.3 A | 1.4 A |
| DC Resistance (Max) | 336 mOhm | 336 mOhm | 336 mOhm |
| Core Type | Ferrite, Unshielded | Ferrite, Unshielded | Unshielded |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package | Radial, Vertical Cylinder | Radial, Vertical Cylinder | Radial, Vertical Cylinder |
| Operating Temperature | -55°C to 105°C | -55°C to 105°C | Not specified |
| Product Status | Obsolete | Active | Not specified |
| RoHS Status | Non-compliant | ROHS3 Compliant | Not specified |
Engineering Selection Recommendations
The 1110-331K-RC is the primary substitute for the obsolete 1110-331K. Both parts are manufactured by Bourns Inc. and share identical electrical and mechanical specifications. The 1110-331K-RC is currently in active production status with improved RoHS3 compliance, making it the preferred choice for new designs and production continuity. Inventory availability is higher for the 1110-331K-RC (1349 pcs vs. 825 pcs).
The IHB1BV331K from Vishay Dale presents a similar alternative with a marginally higher current rating of 1.4 A against the 1.3 A specification. This part maintains the same inductance value, DC resistance maximum, and through-hole radial vertical cylinder package configuration. Selection of the IHB1BV331K should be based on design requirements and supplier availability, as it represents a cross-manufacturer alternative rather than a direct equivalent.
Frequently Asked Questions (FAQ)
Q: Can the 1110-331K-RC be used as a direct replacement for the 1110-331K?
A: Yes. The 1110-331K-RC is a direct equivalent with identical inductance (330 µH), tolerance (±10%), current rating (1.3 A), DC resistance (336 mOhm max), and physical dimensions. The primary difference is product status (active vs. obsolete) and improved RoHS3 compliance.
Q: What is the difference between the 1110-331K and the IHB1BV331K?
A: Both parts share the same inductance value (330 µH), DC resistance (336 mOhm max), and package configuration. The IHB1BV331K has a slightly higher current rating (1.4 A vs. 1.3 A). The IHB1BV331K is manufactured by Vishay Dale rather than Bourns Inc.
Q: Are there packaging differences between the 1110-331K and 1110-331K-RC?
A: The 1110-331K-RC is supplied in bulk packaging, while the original 1110-331K packaging specification is not detailed. Both parts use identical through-hole radial vertical cylinder package configurations with the same physical dimensions (0.660" diameter, 0.840" maximum height).
Q: Why is the 1110-331K classified as obsolete?
A: The 1110-331K has been discontinued by Bourns Inc. The 1110-331K-RC serves as the active production equivalent and is recommended for all new applications.
Q: Can the IHB1BV331K be used in applications designed for the 1110-331K?
A: The IHB1BV331K meets the core electrical specifications (330 µH inductance, 336 mOhm DC resistance) and mounting requirements. The higher current rating (1.4 A) provides additional margin. Compatibility depends on specific circuit requirements and design validation.
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