3D Model Datasheet

DA2420-AL and DA2421-AL PoE Transformers

for ST Micro STE12PS

Developed for ST Microelectronics STE12PS 12-Channel PSE Power Controller

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Part number

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Count	Unit price
1	$2.23
175	$2.00
700	$1.67
1400	$1.39
2800	$1.21
5000	$1.05

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

Packaging

D = 13" machine-ready reel

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Typical Application

Works with STMicroelectronics STE12PS

Input Voltage	Output	Power	Fsw
3.3 V	12 V , 0.1 A	1.2 W	330 kHz

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 2 A (µH)	DCR max (Ω) 3		Leakage Inductance max (µH) 4	Turns Ratio 5	Isolation Voltage (Vrms) 6
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 2 A (µH)	Pri	Sec	Leakage Inductance max (µH) 4	Pri : Sec	Isolation Voltage (Vrms) 6
DA2420-AL_	330	297	0.408	5.920	6.0	1 : 2	500
DA2421-AL_	330	297	0.459	14.150	4.8	1 : 3	500

Notes

When ordering, please specify packaging code: e.g. DA2420-ALD
Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc.
DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance measured on the primary windings with all secondary pins shorted.
Turns ratio is with the primary windings connected in parallel.
500 Vdc isolation from primary to secondary.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape (175 per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

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

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

See FIT/MTBF Calculations

Schematics

Primary windings to be connected
in parallel on the PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
175	330	100	13	50,4	44,4	44	32	4	2	11,9	0,4

General specification

Weight:

14.1 – 14.6 g

Packaging:

175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.p mm pocket depth

Soldering

Resistance to soldering heat:

Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.

Refer to Soldering Coilcraft Components before soldering.

Warehouses

Language settings

Currency settings

DA2420-AL and DA2421-AL PoE Transformers

for ST Micro STE12PS

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering

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Warning