Output Voltage

12 = 7.2 Vdc to 13.2 Vdc

28 = 16.8 Vdc to 29.4 Vdc

Remote ON/OFF Polarity

R = Negative Logic Option

Blank = Positive Logic Option

5 = 0.50 in (12.70 mm)

4 = 0.40 in (10.16 mm)

Threaded Inserts

T = Threaded Inserts

Blank = Clearance Inserts

Y = Non Pb-free (RoHS 5/6 compliant)

Number of Outputs

S = Single

Input Voltage

24 = 18 Vdc to 36 Vdc

48 = 36 Vdc to 75 Vdc

Rated Output Current

300 = 300/308 W

350 = 350 W

Product Family

RFB = Half-Brick

Rev.11.26.07

rfb300/350

3 of 6

Embedded Power for

Business-Critical Continuity

RFB300-24S28-R5T Y

Notes

1

Measurement Bandwidth: 20 MHz; Measured with 1 μF ceramic and a 330 μF

(470 μF for 12 V output model) aluminum or solid tantalum capacitor across

the output terminals.

2

Di/dt = 1 A/μs; ΔIout = ±25% Iout (max); Vin = Vnom; Iout = Inom. Tested

with a 1 μF ceramic and a 330 μF (470 μF for 12 V output model) aluminum

electrolytic capacitor across the output.

3

External input fusing required. Use a fast acting fuse: 40 A (24 V model), 15 A

(48 V, 350 W model).

4

Iout = Iout (max) Measured with the input capacitor, Cbypass = 330 μF, and 6

μH inductor in series with the power source. Frequencies >100 kHz.

5

Signal line assumed <3 m in length.

6

This product is only for inclusion by professional installers within other

equipment and must not be operated as a stand-alone product.

7

Negative remote ON/OFF option also available. Add suffix ‘-R’ to part

number, for example see part numbering system.

8

With the enable signal asserted, this is the time from when the input current

reaches 10 % of the final steady state value until the output voltage reaches

10 % of the nominal output value. Start-up into resistive load.

9

With Vin > Vin (min.) applied for a minimum of 1 second, this is the time

from when the primary ON/OFF signal is activated until the output voltage

reaches 10 % of the nominal output voltage.

10 Minimum effective ESR is 1 mΩ. Minimum phase margin is 35

11 Measured per ETSI 300 132-2 Section 4.7.2.

12 From 10% to 90% of Vout (nom). Full resistive load. 1 μF ceramic and 330 μF

(470 μF for 12 V model) electrolytic capacitors across the output.

10 Minimum effective ESR is 1 mΩ. Minimum phase margin is 35

11 Measured per ETSI 300 132-2 Section 4.7.2.

12 From 10% to 90% of Vout (nom). Full resistive load. 1 μF ceramic and 330 μF

(470 μF for 12 V model) electrolytic capacitors across the output.

13 Converter guaranteed ON for positive option.

14 Maximum driver leakage to insure converter is ON.

15 Converter guaranteed OFF for positive option.

16 Driver sink current @ Vrc ≤ 1.2 V.

17 0.40 in height option is not available on the 12 V output model.

18 The’Y’ suffix indicates that these parts are TSE ToHS 5/6 (non-Pb-free)

compliant

19 New RoHS 6/6 codes coming soon: RFB300-48S28-R5J; RFB350-48S12-R5J.

20 Notice: Some models do not support all options. Please contact your local

sales representative.

PROTECTION

Short-circuit

12 V model RFB300

29.4 A

(Brickwall current

12 V model RFB350

34.4 A

limiting)

28 V model RFB300

12.9 A

28 V model RFB350

14.7 A

Overvoltage protection

12 V model

15 V

(Output shutdown)

28 V model

33.2 V

Overtemperature

(midpoint of baseplate)

110 °C

shutdown