ISC1210ER120K Equivalent & Substitute Parts

Part Overview

The ISC1210ER120K is a 12 µH shielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1210 (3225 Metric) package. This component operates at 175 mA maximum current with a DC resistance of 2.3Ω and is rated for operating temperatures from -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 within specified tolerance ranges.

Substiute Parts

ISC1210ER120K

Vishay DaleIn Stock: 1118ISC1210ER120K Datasheet

Current PartRFQ

CMH322522-120KL

Bourns Inc.In Stock: 3145CMH322522-120KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210ER120K is determined by the following criteria:

Inductance value must match at 12 µH within the ±10% tolerance band. Package and case designation must be identical (1210 / 3225 Metric) to ensure mechanical fit and PCB compatibility. Shielding type must remain shielded to maintain electromagnetic isolation. Operating temperature range must encompass or equal -55°C to 125°C. Surface mount mounting type is required. Current rating of the substitute must be sufficient to handle the application's maximum current demand. DC resistance must be within acceptable limits for the circuit design. Q factor and self-resonant frequency characteristics should align with the original specification to preserve circuit performance at the test frequency of 2.52 MHz.

Parameter Comparison

Engineering Selection Recommendations

The CMH322522-120KL from Bourns Inc. qualifies as a substitute for the ISC1210ER120K based on matching inductance value, tolerance, package designation, shielding configuration, and operating temperature range. Both components are ROHS3 compliant and carry MSL Level 1 rating. The substitute maintains identical Q factor performance at the test frequency of 2.52 MHz. Current rating of the substitute is 140 mA compared to 175 mA for the original part; this difference must be evaluated against circuit requirements. DC resistance of the substitute is 2.5Ω maximum versus 2.3Ω for the original; this 0.2Ω increase should be assessed for impact on circuit losses. Self-resonant frequency differs at 20 MHz for the substitute versus 24 MHz for the original; this parameter should be verified for compatibility with intended operating frequencies. Both parts are active products with current manufacturing status and established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the CMH322522-120KL be used as a direct replacement for the ISC1210ER120K?

A: The CMH322522-120KL meets the core substitution criteria of matching inductance (12 µH), tolerance (±10%), package (1210), shielding (shielded), and operating temperature range (-55°C to 125°C). However, the lower current rating (140 mA vs. 175 mA) and higher DC resistance (2.5Ω vs. 2.3Ω) must be evaluated for your specific application requirements before selection.

Q: What is the impact of the different DC resistance values?

A: The substitute part has a maximum DC resistance of 2.5Ω compared to 2.3Ω for the original. This 0.2Ω difference results in increased power dissipation in the inductor. For a 175 mA current, this represents an additional 7.175 mW of dissipation. Circuit thermal design and current handling must account for this difference.

Q: Are there differences in core material between these parts?

A: The ISC1210ER120K uses an iron powder core, while the CMH322522-120KL uses a ferrite core. Both are shielded drum core designs with identical inductance and Q factor specifications at 2.52 MHz. Core material differences may affect frequency response characteristics outside the specified test frequency.

Q: What does the current rating difference mean for my application?

A: The ISC1210ER120K is rated for 175 mA maximum current, while the CMH322522-120KL is rated for 140 mA. If your circuit operates at currents exceeding 140 mA, the substitute part may not be suitable. Verify your application's maximum current requirement before selection.

Q: Are both parts available in the same packaging format?

A: Yes, both parts are supplied in Tape & Reel (TR) packaging in the 1210 (3225 Metric) surface mount package. Physical dimensions are nearly identical, with height differences of 0.01mm (2.41mm vs. 2.40mm), which is negligible for PCB assembly compatibility.

Q: How do the self-resonant frequencies differ?

A: The ISC1210ER120K has a self-resonant frequency of 24 MHz, while the CMH322522-120KL is specified at 20 MHz. This 4 MHz difference may affect circuit behavior at higher frequencies. Verify that your operating frequency range is compatible with the substitute part's self-resonant frequency characteristics.