# Kepco BOP 72-6M 400W Bipolar Operational Power Supply, Analog Meters (Pre-Owned)

# Kepco BOP 72-6M 400W Bipolar Operational Power Supply, Analog Meters (Pre-Owned)

## Key Features At A Glance

-   Four-quadrant bipolar operation — sources and sinks 100% of rated current, with output passing smoothly through zero with no polarity switching
-   Voltage and current ranges spanning ±20 V to ±200 V and ±1 A to ±20 A across 100 W, 200 W, and 400 W chassis configurations
-   Functions as both a fully rated DC power supply and a high-speed linear power operational amplifier capable of replicating arbitrary AC waveforms
-   Separate voltage and current control circuits with automatic crossover between voltage and current limits
-   50-terminal rear user port providing access to all controls, flag signals, two uncommitted gain-20K user amplifiers, and dual ±10 V references
-   Optional plug-in cards for remote digital control via IEEE 488.2 / SCPI (BIT 4882, BIT 4886), serial bus (BIT TMA-27), or listen-only GPIB (BIT 488B, BIT 488D)
-   Available with analog zero-center meters (M suffix) or digital displays (D suffix); CE marked per Low Voltage Directive EN61010-1

The Kepco BOP Series is a family of bipolar operational power supply / amplifiers offered in 100 W, 200 W, and 400 W chassis configurations, with voltage ranges from ±20 V to ±200 V and current ranges from ±1 A to ±20 A. While each BOP is a fully rated DC power supply, it is also a high-powered operational amplifier with full four-quadrant bipolar operation — its output is capable of both sustained DC and the replication of arbitrary AC waveforms.

Kepco describes the BOP as suited to providing dynamically agile voltage for test and simulation. In Kepco's BOP, the voltage and current outputs can be controlled smoothly and linearly through the entire rated plus and minus ranges, passing smoothly through zero with no polarity switching. Because BOP units are high-speed power operational amplifiers rather than general-purpose power supplies, Kepco notes that the load characteristics should be mainly resistive to realize the full high-speed potential; capacitive loads above 0.1 microfarad require the BOP to be slowed via feedback capacitance to avoid oscillation, and special user-port terminals are provided to slow the BOP for optimum current-mode stability into inductive loading.

ValueTronics International stocks new and pre-owned Kepco BOP Series bipolar operational power supplies. Each unit moves through our 20,000-square-foot secure warehouse at 1675 Cambridge Drive, Elgin, Illinois, where it is logged, inspected, and prepared in-house before shipment — not drop-shipped from a third-party broker. Buyers working on four-quadrant test setups, magnetics drive, or arbitrary-waveform power applications can verify configuration details with our Test Architect team before purchase.

## Brand Heritage

Kepco, Inc. has manufactured power supplies and power-conversion equipment continuously since 1946 from its Flushing, New York facility, and is certified to ISO 9001. The BOP product line has remained under Kepco branding throughout its history — there has been no corporate acquisition or rebrand of the Kepco T&M power-conversion business.

## Compare Other Models in This Series

The Kepco BOP Series spans 100 W, 200 W, and 400 W chassis configurations across fourteen standard models. Within each power tier, models differ in voltage range (±20 V through ±200 V) and corresponding current range (±1 A through ±20 A), with voltage × current always matching the nominal power rating. Closed-loop voltage and current gains, output impedance characteristics, and dynamic response specifications vary across the family per the model table in the datasheet.

Two front-panel display options are offered family-wide: the M suffix denotes analog zero-center meters, while the D suffix denotes digital displays. Mechanical packaging is shared within each power tier — 100 W and 200 W models use a three-quarter-rack chassis, while 400 W models and the ±200 V / ±1 A BOP 200-1M use a full-rack chassis.

Each BOP model below is listed as its own dedicated product page with pre-owned-matched pricing and configuration detail. Select the model that matches your application's voltage range, current range, and power tier; suffix selection (M for analog meters, D for digital displays) and optional factory-installed digital interface cards are noted per the datasheet's suffix designations.

Differences across the family follow the model table directly. At the 100 W tier, the BOP 20-5M provides ±20 V at ±5 A; the BOP 50-2M provides ±50 V at ±2 A; the BOP 100-1M provides ±100 V at ±1 A. At the 200 W tier, six models cover ±20 V/±10 A through ±200 V/±1 A. At the 400 W tier, five models cover ±20 V/±20 A through ±100 V/±4 A.

Beyond voltage and current range, the per-model differences in the comparison table include closed-loop voltage gain (2.0 to 20.0 V/V), closed-loop current gain (0.1 to 2.0 A/V), voltage-mode series R and series L, current-mode shunt R and shunt C, and the dynamic specs (bandwidth, rise/fall time, large-signal frequency response, slewing rate, and step-load recovery in both voltage and current modes). The BOP 200-1M is noted as occupying the same chassis size as the 400 W models despite its 200 W rating, and Kepco notes its 200 V model uses FET output devices where the other models use transistors.

Model

Output Voltage

Output Current

Output Power

**BOP 72-6M**

± 72 V

± 6 A

400 W

BOP 20-5M

± 20 V

± 5 A

100 W

BOP 20-5D

± 20 V

± 5 A

100 W

BOP 50-2M

± 50 V

± 2 A

100 W

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

## Product Core & Specifications

Specification

Rating / Description

Condition

Input

a-c Voltage

95-113, 105-125, 190-226, 210-250 V a-c

User selectable

Current

See source-current table

Max load, 115 V a-c

Frequency

47-65 Hz

Range

Output

d-c Output

Bi-direction, series pass

Transistor (200 V model uses FET)

Type of Stabilizer

Automatic crossover

Voltage / current

Voltage

0 to 100% of rating (bipolar)

Adjustment range for temp 0–55°C

Current

0 to 100% of rating (bipolar)

Adjustment range for temp 0–55°C

Sink

See source/sink plot

Duty cycle

Error Sense

0.5 V per load wire

Voltage allowance

Isolation Voltage

500 V d-c or peak

Output to ground

Leakage Current

<5 microamperes

rms at 115 V a-c, 60 Hz

Output to Ground

<50 microamperes

p-p at 115 V a-c, 60 Hz

Series Connection

500 V

Max voltage off ground

Parallel Connection

Current sharing

Use master-slave connection

OVP

Not available

—

Control

Type

Variable input, fixed gain

Voltage / current

Voltage / Current, Local

10-turn zero-center pot

—

Remote Analog

\-10 V to +10 V

—

Local Digital

Serial bus or GPIB or VXI

Optional internal BIT card

Remote Digital

Use SN or SNR interface

—

Bounding

± Volt/current local (4 screwdriver trimmers); ± Volt/current remote 0 to 10 V

—

Dynamics

See dynamic spec table

Fast only

User Amplifiers

Uncommitted gain 20K

Two provided

References

±10 V, 1 mA

Two provided

Mechanical

Input Connection

Detachable IEC type 3-wire

All models

Output Connections

Front signal/output binding posts; rear user port 50-terminal connector; rear output barrier strip

—

Meters

Two 2½" horizontal, 2% zero-center analog (M models)

Front panel

Indicators

Four LEDs

Voltage / Current / Bounding

Mounting (3/4 rack)

Use RA 37 rack adapter

3/4 rack size

Mounting (full rack)

Mounting "ears" supplied

Full rack size

Cooling

Forced air

Exhaust to rear

Dimensions (3/4 rack)

5-7/32" x 12-17/32" x 17-9/64" (132.6 x 318.3 x 435.4 mm)

H x W x D, add 2.5" rear for connector

Dimensions (Full rack)

5-7/32" x 19" x 20-5/64" (132.6 x 482.6 x 510 mm)

H x W x D, add 2.5" rear for connector

Finish

Light gray, Fed Std 595 color 26440

Front panel

Weight (100 W, 3/4 rack)

47 lb (21.4 kg)

Packed for shipment

Weight (200 W, 3/4 rack)

53 lb (24.1 kg)

Packed for shipment

Weight (Full rack / 400 W and BOP 200-1M)

76 lb (34.5 kg)

Packed for shipment

Compliance

CE marked per Low Voltage Directive (LVD), EN61010-1

—

Warranty

5-Year Warranty

—

### BOP Static Specifications

Influence Quantity

Voltage Mode Typical

Voltage Mode Maximum

Current Mode Typical

Current Mode Maximum

Preamplifier ΔEio

Preamplifier ΔIio

Reference ±10 V

Source (min.–max.)

<0.0005%

0.001%

<0.002%

0.005%

<5 µV

<1 nA

<0.0005%

**Important:** BOP units are high-speed power operational amplifiers, not general-purpose power supplies. Load characteristics should be mainly resistive to realize the full high-speed potential. For capacitive loads above 0.1 µF, the BOP must be slowed in voltage mode by increasing the feedback capacitance to avoid oscillation; special user-port terminals are provided to slow the BOP for optimum current-mode stability into inductive loading.**Important:** BOP units are high-speed power operational amplifiers intended for dynamically agile voltage in test and simulation. They are not general-purpose power supplies. To realize the full high-speed potential of BOP, the load characteristics should be mainly resistive.**Important:** If the load is capacitive (>0.1 microfarad), the BOP must be slowed to avoid oscillation by increasing the value of the feedback capacitance. Special terminals on the user port are available to slow the BOP for optimum current-mode stability into inductive loading.**Important:** Over-voltage protection (OVP) is not available on the BOP series.**Important:** For parallel connection, use master-slave configuration for current sharing.**Important:** To specify a digital display, substitute the suffix letter 'D' for the suffix letter 'M' in the model number. For factory-installed digital interface cards, add the appropriate suffix (-4882, -4886, -TMA, -488B, -488D, -232) to the model number.Recommended pairing: when ordering a BOP in three-quarter-rack chassis (100 W or 200 W models), the Kepco RA 37 rack adapter is referenced in the datasheet for mounting into standard 19-inch racks.

## About this used unit

-   Warranty included.
-   Functional verification included.
-   Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
-   Note that unnecessary accessories may not be included (contact Test Architect to confirm).

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 0.0 USD - 153.0 USD
- **Vendor:** Kepco
- **Type:** Dc Supply
- **Tags:** DC Power Supply, Kepco, Manufacturers, Power Supplies & Loads, product_manual_group_1, Product_used

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 0.00 USD | In stock |
| NIST Traceable | 93.50 USD | In stock |
| NIST Traceable with Full Data | 110.50 USD | In stock |
| ISO IEC 17025 Accredited | 153.00 USD | In stock |

## Images

- Kepco BOP 72-6M 400W Bipolar Operational Power Supply, Analog Meters (Pre-Owned)

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> Source: [ValueTronics](https://valuetronics.com/products/bop72-6m-kepco-dc-power-supply-used)
> Updated: 2026-05-30