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IMC1812ES331J Equivalent & Substitute Parts
Part Overview
The IMC1812ES331J is a 330 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1812 (4532 Metric) package. This component is rated for 85 mA continuous current with a maximum DC resistance of 14 Ohm and operates across the temperature range of -55°C to 125°C. The part is currently active in production and ROHS3 compliant.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the same package footprint and critical performance parameters. Identifying qualified alternatives ensures design flexibility, supply chain resilience, and access to components with comparable inventory availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 330 µH |
| Tolerance | ±5% |
| Current Rating | 85 mA |
| DC Resistance (Max) | 14 Ohm |
| Core Type | Ferrite, Drum Core, Wirewound |
| Shielding | Unshielded |
| Package | 1812 (4532 Metric) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C to 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the IMC1812ES331J are qualified based on strict equivalence across the following critical parameters:
- Inductance value: 330 µH with ±5% tolerance
- Current rating: 85 mA minimum
- DC resistance: 14 Ohm maximum
- Core material and type: Ferrite, drum core, wirewound construction
- Shielding configuration: Unshielded
- Package footprint: 1812 (4532 Metric) surface mount
- Physical dimensions: 0.177" L × 0.126" W (4.50mm × 3.20mm), height 0.134" (3.40mm) maximum
- Compliance: ROHS3 compliant, REACH unaffected
The CM453232-331JL from Bourns Inc. meets all these criteria and is therefore classified as a direct equivalent substitute.
Parameter Comparison
| Parameter | IMC1812ES331J (Vishay Dale) | CM453232-331JL (Bourns Inc.) |
|---|---|---|
| Inductance | 330 µH | 330 µH |
| Tolerance | ±5% | ±5% |
| Current Rating (Amps) | 85 mA | 85 mA |
| DC Resistance (Max) | 14 Ohm | 14 Ohm |
| Core Type | Ferrite, Drum Core, Wirewound | Ferrite, Drum Core, Wirewound |
| Shielding | Unshielded | Unshielded |
| Q @ Frequency | 40 @ 790 kHz | 40 @ 796 kHz |
| Frequency - Self Resonant | 4.6 MHz | 4.6 MHz |
| Package / Case | 1812 (4532 Metric) | 1812 (4532 Metric) |
| Size / Dimension | 0.177" L × 0.126" W (4.50mm × 3.20mm) | 0.177" L × 0.126" W (4.50mm × 3.20mm) |
| Height - Seated (Max) | 0.134" (3.40mm) | 0.134" (3.40mm) |
| Operating Temperature Range | -55°C to 125°C | -40°C to 125°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Both the IMC1812ES331J and CM453232-331JL are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.
The primary distinction between these parts is the operating temperature range. The IMC1812ES331J supports -55°C to 125°C, while the CM453232-331JL operates from -40°C to 125°C. Selection between these parts should be based on the specific application's minimum operating temperature requirement. Applications requiring operation below -40°C must use the IMC1812ES331J. Applications operating at -40°C or above may use either part without thermal performance compromise.
Both components are packaged in tape and reel format and maintain identical electrical specifications, physical dimensions, and compliance certifications. The choice between manufacturers may also be influenced by supply chain availability and lead time considerations.
Frequently Asked Questions (FAQ)
Q: Can the CM453232-331JL replace the IMC1812ES331J in all applications?
A: The CM453232-331JL is electrically and mechanically equivalent to the IMC1812ES331J for applications operating at -40°C or above. Applications requiring operation below -40°C must use the IMC1812ES331J due to its extended lower temperature rating of -55°C.
Q: Are the physical footprints identical?
A: Yes. Both parts use the 1812 (4532 Metric) surface mount package with identical dimensions of 0.177" L × 0.126" W (4.50mm × 3.20mm) and maximum seated height of 0.134" (3.40mm). PCB layout and assembly processes require no modification when substituting between these parts.
Q: Do both parts meet current compliance requirements?
A: Yes. Both the IMC1812ES331J and CM453232-331JL are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component use in regulated markets.
Q: What is the difference in Q factor between these parts?
A: The Q factor is measured at slightly different frequencies: 40 @ 790 kHz for the IMC1812ES331J and 40 @ 796 kHz for the CM453232-331JL. Both achieve the same Q value of 40, with the frequency difference of 6 kHz being negligible for practical circuit design purposes.
Q: Are both parts available in tape and reel packaging?
A: Yes. Both the IMC1812ES331J and CM453232-331JL are supplied in tape and reel (TR) format, suitable for automated assembly processes.
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