Littelfuse TCSA20 - The TCSA Series is a loop-powered, linear output current transducer that provides an output that is directly proportional to the RMS AC current passing through the onboard toroid. The TCSA provides a 4 - 20mA output over a power supply range of 10 - 30VDC. Each unit is factory calibrated for monitoring in one of four ranges; 0-5, 0-10, 0-20, or 0-50A. The 0 - 5A range allows the use of external current transformers so loads up to 1200AC amps can be monitored. See datasheet for operation details.
Littelfuse

TCSA20

Alternate Item Number: TCSA20

UPC: 079458999334

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Overview

The **Littelfuse TCSA20** is a high-precision, loop-powered current transducer engineered for accurate AC current monitoring in industrial environments. Designed as part of the **TCSA Series**, this rugged transducer delivers a **4-20mA linear output** directly proportional to the RMS AC current passing through its onboard toroid, ensuring reliable measurements for critical control systems, power distribution, and automation applications. **Key Features & Benefits:** - **Factory-Calibrated Performance:** Each TCSA20 is pre-calibrated at the factory for one of four current ranges—**0-5A, 0-10A, 0-20A, or 0-50A**—eliminating the need for on-site adjustments in most installations. For applications requiring higher current monitoring (up to **1200A AC**), the **0-5A range** supports integration with external **2VA, 0-5A output current transformers (CTs)**, providing unmatched flexibility. - **Loop-Powered & Versatile:** Operating on a **10-30VDC power supply**, the TCSA20 eliminates the need for separate power sources, simplifying wiring and reducing installation costs. Its **loop-powered design** ensures seamless integration with PLCs, meters, and other control systems via a standard **4-20mA analog output**, a widely adopted industry standard for signal transmission. - **Precision & Adjustability:** The transducer includes **zero and span adjustments** for field calibration, allowing technicians to fine-tune accuracy for specific applications. This feature is particularly valuable in environments where environmental factors or load variations may impact measurement precision over time. - **Isolation & Safety:** With **complete electrical isolation** between the sensed current and the control circuit, the TCSA20 enhances system safety by preventing ground loops and reducing the risk of electrical interference. This isolation is critical in high-noise industrial settings where signal integrity is paramount. - **Robust & Reliable Design:** Built to withstand harsh industrial conditions, the TCSA20 features a durable enclosure and is engineered for long-term reliability. Its compact form factor and straightforward wiring (via screw terminals) make it ideal for panel mounting or DIN rail installations. **Typical Applications:** The TCSA20 is a go-to solution for professionals in industries such as **manufacturing, energy management, HVAC, and data centers**, where precise current monitoring is essential for: - **Power Distribution Monitoring:** Tracking load currents in switchgear, motor control centers (MCCs), and distribution panels to prevent overloads and optimize energy usage. - **Motor & Pump Control:** Measuring current draw in motors and pumps to detect inefficiencies, predict maintenance needs, or trigger protective shutdowns in overcurrent conditions. - **Renewable Energy Systems:** Monitoring AC current in solar inverters, wind turbine generators, and battery storage systems to ensure safe operation and compliance with grid codes. - **Building Automation:** Integrating with building management systems (BMS) to monitor HVAC equipment, lighting circuits, or critical loads for energy efficiency and fault detection. - **Industrial Automation:** Providing real-time current feedback in PLC-controlled processes, enabling closed-loop control for applications like welding, CNC machining, or conveyor systems. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection, power management, and sensing solutions, trusted by engineers and technicians worldwide for over a century. The **TCSA Series** reflects the company’s commitment to innovation, quality, and reliability, offering products that meet stringent industrial standards. With **factory calibration**, **adjustable ranges**, and **external CT compatibility**, the TCSA20 stands out as a versatile and cost-effective choice for professionals who demand precision without compromise. **Installation & Integration:** The TCSA20 is designed for quick and easy installation. Simply pass the monitored conductor through the toroid (or connect an external CT for high-current applications), power the unit with **10-30VDC**, and wire the **4-20mA output** to your control system. The included **zero and span adjustments** allow for minor field calibration if needed, ensuring optimal performance in any application. For detailed wiring diagrams and dimensional specifications, refer to the **Littelfuse TCSA Series datasheet** or contact a certified distributor like **Gross Automation** for expert support. **Ordering & Customization:** The TCSA20 is available in multiple current ranges to suit diverse applications. If your requirements exceed standard options, Littelfuse offers **custom solutions**—contact their technical team at **800-843-8848** or visit **Littelfuse.com/tcsa** for more information. For seamless procurement, partner with **Gross Automation**, a trusted Littelfuse distributor, by calling **+1 (262) 252-1600** or emailing **[email protected]**.
  • Factory-calibrated for 0-5A, 0-10A, 0-20A, or 0-50A ranges
  • Loop-powered 4-20mA output over 10-30VDC power supply range
  • Supports external current transformers for monitoring up to 1200A AC
  • Zero and span adjustments for field calibration
  • Complete electrical isolation between sensed current and control circuit

Specifications

Brand Name
Littelfuse
Connection Type
Screw terminals (4-20mA output)
Current Rating
0-50A (factory-calibrated ranges: 0-5A, 0-10A, 0-20A, 0-50A)
Mounting
Surface mount with one #10 (M5 x 0.8) screw Mount
Mounting Type
Panel Mounting or DIN Rail
Number Of Poles
Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature
-30 to 60 F
Operating Temperature, Maximum
60 F
Operating Temperature, Minimum
-30 F
Pickup Voltage
10/30 V
Series
TCSA Series
Special Features
10Y WARR
Standard
CE/UR/CSA
Sub Brand
SSAC
Voltage Rating
10-30VDC
Package Dimensions (L x W x H)
1.75 IN x 2 IN x 2 IN
Package Dimensions (L x W x H)
44.5 mm x 50.8 mm x 50.8 mm
RTXD Extractor Tool

6896057-1

RTXD Extractor Tool
RTXP 18

RK926011-BC

RTXP 18
Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10
Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

1-1393143-6

Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

SCP102D24X-C02

IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.