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PM1812-100J Equivalent & Substitute Parts
Part Overview
The PM1812-100J is a 10 µH unshielded ferrite core inductor manufactured by Bourns Inc., rated for 250 mA with a maximum DC resistance of 1.6 Ohm. This component is packaged in the 1812 (4532 Metric) surface mount form factor. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 10 µH |
| Tolerance | ±5% |
| Current Rating | 250 mA |
| DC Resistance (Max) | 1.6 Ohm |
| Package / Case | 1812 (4532 Metric) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 100°C |
| Shielding | Unshielded |
Substitute Part Grouping Explanation
Substitute parts for the PM1812-100J are classified based on the following critical parameters:
Direct Equivalents maintain identical electrical specifications: 10 µH inductance, ±5% tolerance, 250 mA current rating, 1.6 Ohm maximum DC resistance, and 1812 package form factor. These parts differ only in product status (active vs. obsolete) or packaging format (Tape & Reel vs. bulk).
Similar Alternatives share the same inductance value, tolerance, DC resistance, and package form factor but may differ in current rating, core material, or operating temperature range. These parts are suitable when the application can accommodate the specified variations.
Partial Alternatives offer different inductance values (4.7 µH) and are listed only when explicitly cross-referenced in the substitute field of the main part data.
Parameter Comparison
| Part Number | Manufacturer | Inductance | Tolerance | Current Rating (mA) | DCR Max (Ohm) | Core Material | Operating Temp (°C) | Product Status | RoHS Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|
| PM1812-100J | Bourns Inc. | 10 µH | ±5% | 250 | 1.6 | Ferrite | -40 ~ 100 | Obsolete | Non-compliant | Bulk |
| PM1812-100J-RC | Bourns Inc. | 10 µH | ±5% | 250 | 1.6 | Ferrite | -40 ~ 100 | Active | ROHS3 Compliant | Tape & Reel |
| 1812-103J | API Delevan Inc. | 10 µH | ±5% | 354 | 1.6 | Ferrite | -55 ~ 125 | Active | Non-compliant | Tape & Reel |
| IMC1812BN100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | Non-compliant | Bulk |
| IMC1812EB100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | ROHS3 Compliant | Bulk |
| IMC1812EU100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | ROHS3 Compliant | Tape & Reel |
| IMC1812RQ100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | Non-compliant | Tape & Reel |
| IMC1812RV100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | Non-compliant | Tape & Reel |
| IMC1812RW100J | Vishay Dale | 10 µH | ±5% | 250 | 1.6 | Iron Powder | -55 ~ 125 | Active | Non-compliant | Tape & Reel |
| CM453232-4R7KL | Bourns Inc. | 4.7 µH | ±10% | 315 | 1.0 | Ferrite | -40 ~ 125 | Active | ROHS3 Compliant | Tape & Reel |
Engineering Selection Recommendations
For RoHS3 Compliance Requirements: PM1812-100J-RC (Bourns Inc.) is the direct equivalent with active product status and ROHS3 compliance. This part maintains identical electrical specifications and 1812 package form factor, differing only in packaging format (Tape & Reel).
For Extended Operating Temperature Range: IMC1812EB100J or IMC1812EU100J (Vishay Dale) extend the operating temperature range to -55°C ~ 125°C while maintaining 10 µH inductance, ±5% tolerance, 250 mA current rating, and 1.6 Ohm maximum DC resistance. IMC1812EB100J is available in bulk packaging; IMC1812EU100J is supplied in Tape & Reel format. IMC1812EB100J achieves ROHS3 compliance.
For Higher Current Capability: 1812-103J (API Delevan Inc.) provides 354 mA current rating with identical inductance, tolerance, and DC resistance specifications. This part is suitable when the application requires increased current headroom within the same package footprint.
For Non-Compliance Applications: IMC1812RQ100J, IMC1812RV100J, or IMC1812RW100J (Vishay Dale) are active alternatives with identical electrical specifications and extended temperature range (-55°C ~ 125°C). These parts are available in Tape & Reel packaging.
Frequently Asked Questions (FAQ)
Q: Can PM1812-100J-RC be used as a direct replacement for PM1812-100J?
A: Yes. PM1812-100J-RC maintains identical electrical specifications: 10 µH inductance, ±5% tolerance, 250 mA current rating, and 1.6 Ohm maximum DC resistance. Both components use the 1812 (4532 Metric) surface mount package. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. bulk). PM1812-100J-RC is ROHS3 compliant.
Q: What is the difference between ferrite and iron powder core materials in these inductors?
A: Both ferrite and iron powder cores are used in the listed substitutes. The PM1812-100J uses ferrite core material. Vishay Dale IMC-1812 series components use iron powder cores. Both core materials achieve the specified 10 µH inductance, ±5% tolerance, and 1.6 Ohm maximum DC resistance within the 1812 package. Core material selection affects frequency response characteristics and Q factor but does not alter the primary electrical parameters for substitution purposes.
Q: Can I use 1812-103J if my circuit requires 250 mA?
A: Yes. 1812-103J is rated for 354 mA, which exceeds the 250 mA requirement of the original PM1812-100J. The part maintains identical inductance (10 µH), tolerance (±5%), and DC resistance (1.6 Ohm Max) specifications. The higher current rating provides additional design margin.
Q: What does the packaging designation "Tape & Reel (TR)" mean?
A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, suitable for automated assembly equipment. Bulk packaging supplies loose components. Both packaging formats contain identical components; the difference is in supply format and handling for production processes.
Q: Are there any compliance differences I should consider?
A: Yes. PM1812-100J-RC, IMC1812EB100J, and IMC1812EU100J are ROHS3 compliant. The original PM1812-100J and several Vishay Dale alternatives (IMC1812BN100J, IMC1812RQ100J, IMC1812RV100J, IMC1812RW100J) are non-compliant. Select ROHS3-compliant alternatives for applications requiring regulatory compliance.
Q: What is the significance of the operating temperature range difference?
A: The original PM1812-100J operates from -40°C to 100°C. Vishay Dale IMC-1812 series alternatives and API Delevan 1812-103J extend this range to -55°C to 125°C. Select extended-range parts for applications requiring operation outside the original temperature specification.
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