Q4437-BL Surface Mount
Flyback Regulator Transformer

• For flyback regulator applications using LM258X SIMPLE SWITCHER^®
• Recommended and approved by National Semiconductor
• 500 Vrms isolation between windings
• RoHS-compliant – 260°C compatible. Tin-silver over tin over nickel over phos bronze.
• COTS Plus tin-silver-copper and tin-lead terminations available
• Custom versions available

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SPECIFICATIONS

Dimensions

T5	Q4437-BL	55	47.3	299.7	2.0	0.110	0.035 (10-11) 0.30 (9-8) 0.32 (4-5)	1 : 0.5 1 : 1.67 1 : 1.67	5 V, 1.8 A 12 V, 0.25 A 12 V, 0.25 A	5.0

1	Leakage inductance measured across the primary at 0.10 Vrms, 100 kHz.
2	DC current at which the primary voltage is measured.
3	Ambient temperature range:	–40°C to +85°C
4	Storage temperature range:	Component: –40°C to +85°C Packaging: –55°C to +80°C
5	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.