3D Model Datasheet

ZA9734 Discontinuous Mode Flyback Transformer

for MAXIM MAXREFDES1249 Miniature Universal Input AC/DC Converter

Designed for MAXREFDES1249 Miniature Universal Input AC/DC Converter (86 V – 305 V AC)
Transformer optimized for 88 V – 440 V 125 KHz Input and delivers 36 W at 48 V DC, 0.75 A
Ideal for Power over Ethernet (PoE) and telecommunication applications
4500 Vrms, one minute isolation (hipot) from the primary and aux to the secondary winding
AEC-Q200 Grade 1 (–40°C to +125°C)

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Count	Unit price
1	$7.58
117	$6.19
234	$4.64
468	$2.78

For high volume or non-stock items, request a quote.

Termination

L = RoHS tin-silver over tin over copper clad steel

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Typical Application

Works with Maxim MAXREFDES1249

Input Voltage	Output 1		Power
Input Voltage	Sec	Aux	Power
88 V — 440 V	48 V , 0.75 A	12 V , 0.02 A	36 W

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 2.5 A (µH) 3	DCR max (Ω)			Leakage Inductance max (µH) 4	Turns Ratio	Isolation Voltage (Vrms) 5
Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 2.5 A (µH) 3	Pri	Sec	Aux	Leakage Inductance max (µH) 4	Pri : Sec : Aux	Isolation Voltage (Vrms) 5
ZA9734-DL	115.0	103.5	0.420	0.305	0.551	1.25	1 : 0.882 : 0.294	4500

Notes

Output is for the secondary. Aux winding output is 12 V, 0.02 A.
Inductance is for the primary, measured at 125 kHz, 0.5 Vrms, 0 Adc.
Peak primary current drawn at minimum input voltage.
Leakage inductance is for the primary and is measured with the secondary shorted.
4500 Vrms isolation (hipot) from primary to secondary; 1500 Vrms isolation between primary and auxiliary.

Termination:

RoHS-compliant. 260°C compatible. RoHS tin-silver over tin over copper clad steel. Other terminations available at additional cost.

Packaging:

117 parts per tray

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+125°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Inductance vs Current

Schematics

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

11 g

Packaging:

117 parts per tray

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Only pure water or alcohol recommended.

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ZA9734 Discontinuous Mode Flyback Transformer

for MAXIM MAXREFDES1249 Miniature Universal Input AC/DC Converter

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Performance curves

Inductance vs Current

Schematics

Physical characteristics

General specification

Soldering/Washing

Warning