Part: MSD1260T — Coilcraft Type: Shielded Coupled Inductor Description: The MSD1260T series is a family of shielded coupled inductors designed for high temperature applications up to 125°C ambient, featuring tight coupling (k ≥ 0.97) and 500 Vrms isolation, suitable for flyback, multioutput buck, SEPIC, and Zeta converters.

Operating Conditions:

• Operating temperature: -40°C to +125°C ambient with I rms current
• Winding-to-winding isolation: 500 Vrms

Absolute Maximum Ratings:

• Max part temperature: +165°C
• Max storage temperature: -40°C to +165°C

Key Specs: (for MSD1260T-153ML_)

• Inductance: 15 μH ±20% (at 100 kHz, 0.1 Vrms, 0 Adc)
• DCR: 0.085 Ohms max (each winding)
• SRF: 18.0 MHz typ
• Coupling coefficient: 0.99 typ
• Leakage Inductance: 0.32 μH typ (L1, L2 shorted)
• I sat (30% drop): 5.80 A (sum of current in both windings)
• I rms (both windings): 2.06 A (40°C temperature rise from 25°C ambient)
• Winding-to-winding isolation: 500 Vrms

Features:

• Shielded construction
• High temperature operation up to 125°C ambient
• Tight coupling (k ≥ 0.97)
• High inductance, high efficiency, and excellent current handling
• Can be used as two single inductors (series or parallel) or as a common mode choke
• RoHS compliant matte tin over nickel over phos bronze terminations

Applications:

• Flyback converters
• Multioutput buck converters
• SEPIC converters
• Zeta converters

Package:

• Surface Mount (dimensions provided in inches/mm)

MSD1260T-153ML — Surface Mount Coupled Inductor (4-Pin)

Notes

• Part Specification: MSD1260T-153ML — 15 μH ±20%, 0.085 Ω max DCR per winding, 0.99 coupling coefficient, 500 Vrms winding-to-winding isolation.
• Pin Identification: Pin 1 is marked by a dot on the component package; dash number indicates internal code variant.
• Winding Configuration: L1 and L2 are tightly coupled (k ≥ 0.97). Leads can be connected in series (4× inductance, 2× DCR) or parallel (same inductance, ½ DCR) or used as two independent inductors.
• Current Ratings: I_rms (both windings) = 2.06 A; I_rms (one winding) = 2.92 A; I_sat (10% drop) = 4.60 A.
• Temperature: Rated for ambient up to +125°C; maximum part temperature +165°C.
• Isolation: 500 Vrms, one minute between windings.

The MSD1260T series of shielded coupled inductors was designed specifically for high temperature applications up to 125°C ambient.

Tight coupling (k ≥ 0.97) and 500 Vrms isolation make them ideal for use in a variety of circuits including flyback, multioutput buck, SEPIC and Zeta. These parts provide high inductance, high efficiency and excellent current handling.

They can also be used as two single inductors connected in series or parallel or as a common mode choke.

Typical Buck Converter with auxiliary output

Typical Buck Converter with auxiliary output

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