











Model 9129B
Triple Output Programmable DC Power Supply
Price: $899 / 3 yr Warranty
Name | Qty | Last Updated | ||
---|---|---|---|---|
SEFRAM | 3 | 2025-08-26 | ||
FARNELL | 4 | 2025-08-26 | ||
TME | 2 | 2025-08-26 | ||
VALUETRONICS | 1 | 2025-08-26 | ||
Buerklin | 1 | 2025-08-26 | ||
DIGI-KEY | 30 | 2025-08-26 | ||
NEWARK | 13 | 2025-08-26 | ||
TESTEQUITY | 43 | 2025-08-26 | ||
MOUSER ELECTRONICS | 12 | 2025-08-25 | ||
TEST EQUIPMENT DEPOT (FOTRONIC) | 5 | 2025-08-25 | ||
FINAL TEST INC. | 1 | 2025-02-25 |
Overview
The 9129B is an economical triple output linear programmable DC power supply featuring isolated outputs that can be adjusted independently or combined in series or parallel to output higher voltage or current. Additionally, this supply can operate in tracking mode with user-configurable ratios between channels.
The front panel keys and rotary knob with convenient cursors let users quickly set voltage and current values. Up to 27 different instrument settings can be saved and recalled. The power-on state of the outputs can also be configured.
The USB to TTL interface supporting SCPI commands can be used to remotely control the power supply via a PC. Alternatively, users can control the 9129B, execute test sequences or log measurements using the provided PC software application. This software also integrates with Data Dashboard for LabVIEW apps enabling iOS, Android, or Windows 8 compatible tablets or smartphones to remotely monitor select measurement indicators.
- Three independent and electrically isolated outputs
- Displays voltage and current settings for all three channels simultaneously
- Low noise, linear regulation
- Series and parallel modes combine channels to increase the output voltage or current
- Tracking mode allows users to set up channels to maintain a programmed ratio
- Fully programmable channels with output On/Off control
- Store and recall up to 27 instrument settings
- Communicate via USB interface supporting SCPI commands using the included USB to TTL serial adapter
- Softpanel for remote control, test sequence generation, and datalogging available
- Overvoltage (OVP) and overtemperature (OTP) protection including keylock function
- Compact 19” half-rack form factor allows for side-by-side rack mounting of two units
- Suitable for a wide range of applications including education, service and electronic design
Consider the 9130B Series if you are looking for an enhanced version with better specifications and many additional features.
Documents
Documentation
Software
Description |
Version |
Download |
---|---|---|
LabVIEW 2020 Drivers
|
1.0.0
|
|
IT-E132 and IT-E132B USB Cable Adapter Driver
|
v1.14.0
|
|
DC Power Supply Operating Software w/ LabVIEW 2022 Run-Time Engine (Supports Windows® 10 and 11)
|
V1.0.5
|
|
New DC Power Supply Operating Software (Supports Windows® 10 and 11)
|
V1.0.5
|
Accessories

General Purpose Power Supply Accessory Kit
CC545
Model CC545 General Purpose Power Supply Accessory Kit provides almost everything one needs to put their bench power supply to work. The kit includes 3 high-capacity test leads with retractile sleeve plugs. Rated at 600 V CAT II and 36 Amps, the leads provide safe connection to either standard or sheathed jacks while its silicone jacket wire stays flexible under all conditions.
For day-to-day connections, included are 4/6mm spade lug adapters along with 4mm banana plug adapters. Unique to the kit are 3 extra-large alligator clips which offer a wide range of connection capabilities. Fully insulated 1,000V CAT III or 600V CAT IV, the clips are capable of attaching to leads as small as 0.01" or lugs to a diameter of 1.25" all while carrying currents up to 36A. All components are supplied in black, red, and green for easy identification.
Also included is a BNC female to double banana plug adapter, a BNC male to double binding post adapter, and a BNC male cable assembly for powering those RF testing applications.
Features:
- High Capacity Retractile Sheath Leads
- Connection Adapters
- Extra-large insulated alligator clips
- Black, red & green components
- Storage case
Applications:
- R&D Laboratories
- Production Test Stations
- Service & Repair Facilities
- Educational Test Benches
- MSRP: $145

Rack mount kit for select models
IT-E151
The IT-E151 is for rack mounting of compatible products in either a side-by-side configuration or single unit configuration where a provided blank is used to fill the empty space. The dimensions for the kit are 5.24" (133mm) by 19" (482.6mm).
Compatible models:
- 1785B Series | - 8512 |
- 9120A Series | - 8514 |
- 9150 Series | - 8518 |
- 9130B Series | - 8600 |
- 8542B | - 8601 |
- 8500/B | - 8602 |
- 8502/B | - 9801 |
- 8510/B | - 9200 Series |
- MSRP: $105

30A Hook-up Cable Set
TL 30
30 Amp test leads that are ideal for bench power supply applications that require clip termination such as battery charging. Note that the spade lug connector will not connect to power supplies with banana only jacks. The power supply must have a threaded binding post.
- #10 Spade Lug to Large 3" Battery Clips
- Jaws open to 0.75" (19 mm)
- 30A rating
- Black and Red pair
- Approximate overall length 30" (0.75m)
- MSRP: $25

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

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

USB to TTL Interface
IT-E132B
This is the USB to TTL interface replacement part that was originally included with its paired product. A standard USB cable is included.
- MSRP: $73

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

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

Banana Plug Test Lead
CT3752-100
UL Listed 4mm Straight Sheathed Banana Plug to Straight Sheathed Banana Plug Test Lead pair, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Available in 3 standard lengths
- Available in Black and Red Pair
- MSRP: $18

Banana Plug Test Lead
CT3752-150
UL Listed 4mm Straight Sheathed Banana Plug to Straight Sheathed Banana Plug Test Lead pair, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Available in 3 standard lengths
- Available in Black and Red Pair
- MSRP: $20

Banana Plug Test Lead
CT3752-200
UL Listed 4mm Straight Sheathed Banana Plug to Straight Sheathed Banana Plug Test Lead pair, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Available in 3 standard lengths
- Available in Black and Red Pair
- MSRP: $22

Lead, Med. Allig - Shth P - SILIC 0.82, B/R Pair
CT3803-30
The CT3803-60 is a versatile pair of test leads featuring medium-size, fully insulated alligator clips ideal for general-purpose testing and temporary connections. Designed for reliability and flexibility, each lead is constructed with 0.82 mm² (18 AWG) silicone wire for excellent performance in both lab and field applications. The flexible silicone jacket resists heat and wear, making it a durable choice for engineers, technicians, and educators. These leads are color-coded in black and red for clear polarity identification and are ideal for test benches, prototyping, and service diagnostics.
Features:
- Medium Alligator Clips: Secure, insulated grips for safe and reliable temporary connections
- Silicone Jacketed Wire: 0.82 mm² conductor with high-flexibility and resistance to abrasion and heat
- Dual-Color Pair: Includes one red and one black lead for easy polarity identification
- Convenient Length: 60 cm (23.6 in) for compact and efficient bench setups
Applications:
- Prototyping and Breadboarding: Perfect for fast setup and teardown of test circuits
- Service and Diagnostics: Useful for connecting to components, terminals, or wire bundles during troubleshooting
- Educational Labs: Durable and safe for repetitive use in classroom environments
- General Test & Measurement: A go-to lead set for any technician or engineer’s toolbox
- MSRP: $12

Lead, Med. Allig - Shth P - SILIC 0.82, B/R Pair
CT3803-60
The CT3803-60 is a versatile pair of test leads featuring medium-size, fully insulated alligator clips ideal for general-purpose testing and temporary connections. Designed for reliability and flexibility, each lead is constructed with 0.82 mm² (18 AWG) silicone wire for excellent performance in both lab and field applications. The flexible silicone jacket resists heat and wear, making it a durable choice for engineers, technicians, and educators. These leads are color-coded in black and red for clear polarity identification and are ideal for test benches, prototyping, and service diagnostics.
Features:
- Medium Alligator Clips: Secure, insulated grips for safe and reliable temporary connections
- Silicone Jacketed Wire: 0.82 mm² conductor with high-flexibility and resistance to abrasion and heat
- Dual-Color Pair: Includes one red and one black lead for easy polarity identification
- Convenient Length: 60 cm (23.6 in) for compact and efficient bench setups
Applications:
- Prototyping and Breadboarding: Perfect for fast setup and teardown of test circuits
- Service and Diagnostics: Useful for connecting to components, terminals, or wire bundles during troubleshooting
- Educational Labs: Durable and safe for repetitive use in classroom environments
- General Test & Measurement: A go-to lead set for any technician or engineer’s toolbox
- MSRP: $13

Banana Plug Test Lead
CT3805-100
Pair of 4mm Right-Angle Sheath Banana Plug to Insulated Alligator Clip Test Leads, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Alligator Clip: Steel, Nickel Plt.
- Jaws open to 0.31" (7.9 mm)
- Available in 3 standard lengths
- Black and Red pair
- MSRP: $15

Banana Plug Test Lead
CT3805-30
Pair of 4mm Right-Angle Sheath Banana Plug to Insulated Alligator Clip Test Leads, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Alligator Clip: Steel, Nickel Plt.
- Jaws open to 0.31" (7.9 mm)
- Available in 3 standard lengths
- Black and Red pair
- MSRP: $12

Banana Plug Test Lead
CT3805-60
Pair of 4mm Right-Angle Sheath Banana Plug to Insulated Alligator Clip Test Leads, Black and Red. Highly flexible silicone jacketed test lead wire.
- Banana Contact: BeCu, Nickel Plt.
- Alligator Clip: Steel, Nickel Plt.
- Jaws open to 0.31" (7.9 mm)
- Available in 3 standard lengths
- Black and Red pair
- MSRP: $13

Double Banana Plug to BNC Male, Cable Assembly
CT4450-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few. Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4450 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $16

Double Banana Plug to Double Banana Plug Male, Cable Assembly
CT4451-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4451 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $20

BNC to Stacking Banana Plug, Cable Assembly
CT4452-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4452 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $20

BNC to Retractile Sheathed Stacking Banana Plug, Cable Assembly
CT4453-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4453 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $20

Double Banana Plug to Stacking Banana Plug, Cable Assembly
CT4454-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4454 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $26

Double Banana Plug to Retractile Sheathed Stacking Banana Plug, Cable Assembly
CT4455-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4455 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $26

Double Banana Plug to Alligator Clips Breakout, Cable Assembly
CT4456-100
Although the molded double plug (MDP) is a classic design, their usage in test and measurement is universal and timeless. They are usable with most all major pieces of test equipment such as Power Supplies, Loads, DMMs, and Function Generators, to name just a few.
Molded of durable, flame-retardant Polypropylene (PP), the ergonomic MDP body is easy to handle and connect. The CT4456 uses RG58C/U, 50 Ω coaxial cable.
- MSRP: $16
Additional Materials
Name |
Description |
---|---|
Power Supply Selection Guide
|