ABB - Electrification X20-B4-48-ND - PSTX normal duty enclosed softstarters are the ultimate softstarting solution. Includes all features of the PSTX normal duty, sized for normal duty applications. Both the PSTX softstarter and TMAX XT breakers are utilized. Door mounted pilot devices include PSTX keypad, hand-off-auto selector switch, start and stop pushbuttons, power on pilot light, run pilot light and fault pilot light. Good for Normal Duty class 10 starts for 20HP/28A, heavy duty class 30 starts for 15HP/25A, SSCR rating of 65kA, 480V and type 4 enclosure.
ABB - Electrification

X20-B4-48-ND

Contact for Pricing

Overview

The ABB PSTX Normal Duty Enclosed Softstarter (SKU: X20-B4-48-ND) is a factory-assembled, Type 4-rated softstarting solution designed for industrial motor control applications requiring normal duty Class 10 starts (20HP/28A) or heavy duty Class 30 starts (15HP/25A). Rated for 480V three-phase operation with a 65kA Short Circuit Current Rating (SSCR), this unit is built to withstand harsh industrial environments, including dust, moisture, and corrosive atmospheres, within a NEMA Type 4 enclosure. Key features include a detachable IP66-rated keypad with a graphical LCD display, hand-off-auto selector switch, start/stop pushbuttons, and power/run/fault pilot lights for local control and monitoring. The integrated TMAX XT breaker (XT1H020AFF000XXX, 65kA, 20A) provides overcurrent protection, while the built-in bypass contactor and thermostat-controlled fan cooling optimize performance and energy efficiency. The softstarter supports up to 10 starts per hour for models PSTX20–PSTX250 and includes overload capability rated to Class 10. It is ideal for applications such as centrifugal pumps, compressors, conveyor belts, elevators, and belt thrusters. The unit operates across a wide ambient temperature range (-25°C to +40°C) and altitudes up to 4,000 meters, with voltage tolerance of +10%/-15% at 50/60 Hz. Signal relays (3 programmable) enable remote monitoring and integration into existing control systems. ABB’s conformal-coated PCB technology enhances durability, and advanced torque control prevents water hammering in pump systems.
  • Factory-assembled Type 4 enclosure for protection against dust, moisture, and corrosive atmospheres
  • Supports normal duty Class 10 starts (20HP/28A) and heavy duty Class 30 starts (15HP/25A)
  • Rated 480V three-phase with 65kA Short Circuit Current Rating (SSCR)
  • Integrated TMAX XT breaker (XT1H020AFF000XXX) for overcurrent protection
  • Detachable IP66-rated keypad with graphical LCD, H-O-A switch, start/stop buttons, and pilot lights
  • Torque control function prevents water hammering in pump applications
  • Up to 10 starts/hour (PSTX20–PSTX250) or 6 starts/hour (PSTX300–PSTX1000)
  • Operates from -25°C to +40°C with altitude tolerance up to 4,000 meters
  • Conformal-coated PCB for reliability in harsh industrial conditions

Specifications

Color
Blue
Connection Type
Screw Terminal
Current Rating
28 A
Enclosure
NEMA 4
Frequency
50/60 Hz
IP Rating
IP66
Material
Poly
Mounting Type
Enclosed
Nema Rating
Type 4
Poles
3P+G
Series
PSTX
Size
Size 1
Special Features
The PSTX offers complete motor protection in only one unit and is able to handle both load and network irregularities. PT-100, earth fault protection and over/under voltage protectionalong with many other functions keep your motor safer than ever.It offers three types of current limit: standard, dual and ramp. This gives you full control of your motor during start. It also allows you to use your motor in weaker networks.The bypass is built in and saving you time during installation and space in your panel.The PSTX features many application enhancingfeatures, including torque control: the mostefficient way to start and stop pumps. The pumpcleaning feature can reverse pump flow and cleanout pipes, securing uptime of your pump system. Main benefits • Secure motor reliability• Improve installation efficiency• Increase application productivity.Main features • Three-phase controlled• Operational voltage: 440 to 480 V AC• Wide rated control supply voltage: 100-250 V, 50/60 Hz• Rated operational current: 15…1250 A• Coated circuit boards• Torque control for excellent control of pumpsAdditional normal/heavy duty features • Circuit Breaker or Fuses• Door Mounted Keypad• Start Pushbutton• Stop Pushbutton• Hand-Off-Auto selector switch• Power On Pilot Light• Run Pilot Light• Fault Pilot LightAdditional extreme duty features • Circuit Breaker or Fuses• Door Mounted Keypad• Emergency Bypass• Start Pushbutton• Stop Pushbutton• Hand-Off-Auto selector switch• Normal-E-Bypass selector switch• E- Bypass Start Pushbutton• E-Bypass Stop Pushbutton• Power On Pilot Light• Run Pilot Light• Fault Pilot Light• E-Bypass Pilot Light
Voltage Rating
480 VAC
Voltage Rating
480 V
Package Dimensions (L x W x H)
20 IN x 12 IN x 24 IN
Package Dimensions (L x W x H)
50.8 cm x 30.48 cm x 60.96 cm
Package Weight (Imperial)
200.000 L
Package Weight (Metric)
90.720 kg
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One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.

LCMA6-8-C

One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.
Ground Lug

DNGL

Ground Lug
CONTACT BLOCK BU BLB-02

BLB-02

CONTACT BLOCK BU BLB-02
CONTACT BLOCK BU BFB-40

BFB-40

CONTACT BLOCK BU BFB-40

Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

What technical support does Jokab Safety offer?

Jokab Safety offers comprehensive technical support through multiple channels, including a dedicated technical support phone line at (888) 385-1221 (Option 1) and email support at [email protected]. For advanced technical assistance, customers can contact their specialized Jokab Tech Support at (519) 982-0976 or email [email protected]. Additionally, they provide product specialist support through Jeff Leslie, who can be reached at (519) 982-0976, offering in-depth application and technical guidance.

What are the main product lines offered by Jokab Safety?

Jokab Safety offers a comprehensive range of machine safety products including safety light guards (Orion), safety controllers (Pluto), safety relays (Sentry), safety edges, safety contact mats, safety locks (Gkey), and safety sensors with OSSD and DYNlink interfaces. Their product lines are specifically designed for industrial applications in food and beverage, packaging, and material handling industries, providing robust safety solutions for machine guarding and personnel protection.

What are the key features of Jokab Safety products?

Jokab Safety products offer comprehensive industrial safety solutions with key features including: highest safety certification levels (up to PL e/Cat 4), extensive fault detection, multiple safety device types (optical safety devices, pressure sensitive devices, sensors, switches, locks, emergency stops), and innovative DYNlink technology that reduces cable requirements and simplifies installation. Their products are certified, verified, and compatible with major industrial automation systems like B&R, featuring easy M12 connector connections and a wide range of adapters to streamline safety implementation.

What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

What industries and applications are ABB - Electrification products used for?

ABB - Electrification products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

What technical support does ABB - Electrification offer?

ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

What are the main product lines offered by ABB - Electrification?

ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

What are the key features of ABB - Electrification products?

ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.