Model 1687B

1685B Series

1-36V 0-10A Switching DC Power Supply

Price: $459 / 2 yr Warranty

Name Qty Last Updated
DIGI-KEY 115 2026-05-08
TME 3 2026-05-08
TESTEQUITY 34 2026-05-08
NEWARK 9 2026-05-08
MOUSER ELECTRONICS 39 2026-05-06

Overview

The B&K Precision 1685B, 1687B, and 1688B switching mode DC power supplies provide various configurations of high output voltage or high output current in a small, lightweight form factor. In addition to their constant voltage (CV) and constant current (CC) modes, these high efficiency DC power supplies offer unique preset and remote control modes. Up to three different presets of voltage and current values can be saved for quick recall through a rear switch. For remote control, an analog remote control terminal is accessible on the rear, or use the USB interface to communicate with the power supply via PC software or remote commands. These features make the 1685B, 1687B, and 1688B suitable for a wide range of applications including production testing, telecommunications, R&D, electronic field service, and university labs.

  • Automatic CV/CC crossover operation
  • Lightweight and compact
  • Rotary encoder control for precise voltage and current setting
  • 3 user-defined voltage and current presets
  • USB interface with PC software for remote control and external timed programming
  • Analog remote control function
  • Overvoltage, overtemperature, and overload protection

Models

Product Max Voltage Max Current Max Power Number of Outputs Interface MSRP
1685B 60 V 5 A 300 W 1 USB, Analog $459
1687B 36 V 10 A 360 W 1 USB, Analog $459
1688B 18 V 20 A 360 W 1 USB, Analog $459

Documents

Documentation

Software

CP210X_USB_Driver.zip - version: V11.3.0
USB Virtual COM Drivers (Supports Windows 10/11)
pscs_software.zip - version: 3.0.18
Operating Software (Supports Windows(R) 7/8.1/10)
168xB_hcs_software.zip - version: 0.9
HCS Operating Software (Supports Windows(R) 7) Logiciel d'exploitation HCS (compatible avec Windows(R) 7)
1685B_Series_Software_Readme.txt - version: n/a
1685B Series Software Readme

Accessories

TL 5A

5A Hook-Up Cable Set

TL 5A

 

  • 4mm Banana plug to alligator clip
  • 5A rating
  • Black and Red pair
  • 40" (1.0m) length

 

MSRP: $15
TLPS

Power Supply Test Leads Set

TLPS

This accessory kit combines safety and functionality. A must have for anyone who uses power supplies or loads.

  • Medium and large insulated alligator clips
  • Black and red components
  • Sense lead included

 

 

Description Max current
Red and black test lead (120 cm) 25 A
Spade lug adapters (6 & 4 mm) 36 A
Standard alligator clips 3 A
4 mmBanana plug adapters 36 A
Large insulated alligator clips 36 A
Red and black sense leads (10 cm) 3 A

MSRP: $69
TLPWR31

100 cm Premium Spade Connector Test Lead Set

TLPWR31

High quality red and black cable dual diameter spade connectors for connecting to power supplies or DC loads.

  • Length: 1 meter
  • Rated current: 30 A
  • Connectors: 6/4 mm Spade lug
  • Wire material: flexible silicon jacket

MSRP: $61
TLPWR32

200 cm Premium Spade Connector Test Lead Set

TLPWR32

High quality red and black cable dual diameter spade connectors for connecting to power supplies or DC loads.

  • Length: 2 meter
  • Rated current: 30 A
  • Connectors: 6/4 mm Spade lug
  • Wire material: flexible silicon jacket

MSRP: $76
RMTCTLCNTR

Replacement Analog Remote Control Connector

RMTCTLCNTR

Replacement Analog Remote Control Connector.

  • For models:
    • 1685B Series
    • 1900B Series
    • 9103 9104 Series

MSRP: $20

Additional Materials

Name

Description
Power_Supply_SelectGuide_2026.pdf
Power Supply Selection Guide