Features

■ 250W, 500W, 750W, 115/230Vac

Strappable Single-Phase

■ 1.5, 3, 5 kW, 208Vac Three-Phase

■ 20-50 mS Holdup

■ UL, CSA, TÜV, VDE, BABT

■ FCC/VDE Class B (single-phase)

■ FCC/VDE Class A (three-phase)

■ BUS OK, AC OK, DC OK

Status Signal

■ 96-98% Efficiency

■ PC and Chassis Mount

■ VI-26X, VI-J6X Series Compatible

■ CE Marked

Product Highlights

From AC line in, to highly regulated DC

out, Vicor offers the total design solution

through a complete family of off-line front

end and DC-DC modular power components.

Vicor’s family of off-line front ends

interface VI-260 and VI-J60 series

DC-DC converters, and MegaMods, to

100, 115, 230 or 240Vac single-phase and

208Vac three-phase mains. In addition,

front ends provide conducted EMI/RFI

filtering to FCC/VDE (Class B single-

phase, Class A three-phase), transient

surge protection, active inrush limiting, a

BUS OK status output (suitable for

controlling Vicor DC-DC converter

modules via their Gate In pin) and an AC

OK status output for system use in the

event of loss of the AC line.

Operating Temperature

(Free Convection)

C: 0°C to +50°C (750W: +45°C)

I: -20°C to +50°C (750W: +45°C)

Storage Temperature

-40°C to +80°C

Off-Line

Front Ends

Single or Three Phase

Strappable

Single Phase (250, 500, 750W)

Three Phase (1.5, 3, 5 kW)

AC Line Input

Strappable 115/230Vac

208 Vac +20%/–10%

(Wye or Delta, ø to ø)

With Range Strap

90 Vac to 135Vac

N/A

Without Range Strap

180 Vac to 270Vac

N/A

Line Frequency

47 to 63 Hz (“C” Grade)

47 to 63 Hz (“C” Grade)

47 to 440 Hz (“I” Grade)

47 to 440 Hz (“I” Grade)

Line Inrush Current

115Vac Operation

35A at peak line

230Vac Operation

67A at peak line

240Vac Operation

52A at peak line

AC Leakage Current

1.9 mA max. at 250Vac,

3.2 mA max. at 208Vac, 63 Hz

63 Hz (“C ” Grade)

Power Factor (at full load)

0.52 to 0.65 (at low line input)

0.9 (typical at nom. line)

Holdup Time (at full load)

Low Line

250W (60 Hz): 4 ms min.

500, 750W (60 Hz): 7 ms min.

Nominal Line

250W (60 Hz): 27 ms min.

20 ms min. (47 Hz)

500, 750W (60 Hz): 29 ms. min.

AC Fail Warning Time

250W: None

5 ms min.

(at full load)

500, 750W: 6 ms min.

Module Gate Control Output

Called BUS OK

Called Module Enable

(open drain FET, non-isolated,

referenced to –DC output)

ENABLE

Active High (FET cutoff)

Active High (FET cutoff)

Vds max. 18V transorb clamp

Power-up threshold >227V

Power up threshold DC bus:

Vds max: 15V zener clamp

250W: 216V, ±12%

500, 750W: 244, ±3.5%

ENABLE

Inactive state (DC BUS <190V ±5%)

Inactive state (DC BUS <187Vdc)

Current sinking 100 mA @

Current sinking 100 mA @

.3 Vds max., threshold DC bus

.3Vds max.

250W: 172V, ±16%

500, 750W: 175V, ±3.5%

AC OK and BUS OK Status

500, 750W only

AC OK and BUS OK

Outputs (optically isolated,

transistor output; 500W,

750W only)

Off State Breakdown

70Vce max.

70 Vce max.

Voltage

On State Voltage

.4Vce (sat.) max. at 1 mA

.4 Vce (sat.) max. at 1 mA

On State Current

15 mA max.

15 mA max.

On State Threshold

80-89Vac

>210 Vdc/187Vac

(no load)

Off State Threshold

85-76Vac

<205 Vdc/<182Vac

(load dependent)

Conducted EMI/RFI

VDE 0871/FCC part 15, Class B

VDE 0871/FCC part 15, Class A

Dielectric Withstand

AC line (both phases)

AC line (all phases)

to GND or case

to GND or case

1.5 kVAC; 2121Vdc

1.5 kVAC; 2121Vdc

Transient Surge Withstand

IEC 61000-4-5, Level 3

IEC 61000-4-5, Level 3

Capability (with no disruption

of function)

Common Mode

1.2/50 µs, 2 kV,

1.2/50 µs, 2 kV,

either polarity

either polarity

0 to 360 degree phase angle with

0 to 360 degree phase angle with

respect to AC line

respect to AC line

Normal Mode

1.2/50 µs, 1 kV pulse,

1.2/50 µs, 1 kV pulse,

either polarity

either polarity

0 to 360 degree phase angle with

0 to 360 degree phase angle with

respect to AC line

respect to AC line

Front End Specifications:

(typical at T = 25˚C, nominal line, 75% load, unless otherwise specified)

Rev 1

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