T9AS1D12-48 48VDC 30A PCB Power Relay SPST-NO High Current Sealed Relay

The T9AS1D12-48 is a high-power sealed PCB relay engineered for demanding industrial and commercial switching applications that require reliable control of high-current loads. Built on TE Connectivity's T9A relay platform, this robust component features a Form 1A (SPST-NO) contact arrangement and is designed to deliver long service life, high electrical endurance, and stable performance under heavy-duty operating conditions.

This relay operates with a 48VDC coil featuring a coil resistance of 2304 and a coil power rating of approximately 1W, ensuring efficient operation with controlled energy consumption. Its sealed construction protects internal contacts from dust, flux contamination, and environmental exposure, improving long-term reliability in both automated manufacturing and field-installed systems.

The T9AS1D12-48 supports high switching capability, rated for up to 30A at 240VAC and 20A at 28VDC, with a maximum load capacity reaching 40A under specific conditions (277VAC/28VDC). This makes it suitable for controlling motors, compressors, heaters, pumps, transformers, lighting circuits, and other high-power electrical loads requiring dependable switching performance.

The relay utilizes silver alloy (AgCdO) contact material, providing excellent conductivity, arc resistance, and extended contact life under repetitive switching conditions. This ensures consistent performance even in high-inrush or inductive load environments.

Designed for PCB mounting with a horizontal layout, the relay offers secure installation and efficient integration into industrial control boards, power modules, and OEM equipment. Its Class F insulation system enhances thermal endurance, allowing operation in elevated temperature environments where reliability is critical.

With UL and CSA approvals, the T9AS1D12-48 meets recognized international safety and performance standards, making it suitable for regulated industrial and commercial applications.

Key Features

High-power PCB-mounted sealed relay

Form 1A (SPST-NO) contact configuration

48VDC coil voltage

Coil resistance: 2304

Coil power: ~1W

High switching capacity: 30A at 240VAC

20A switching at 28VDC

Maximum load capability up to 40A (277VAC/28VDC)

Sealed construction for environmental protection

Silver alloy (AgCdO) contacts

Class F insulation system

PCB horizontal mounting design

UL/CSA certified

High reliability for industrial use

Applications

Industrial automation systems

HVAC equipment

Motor and compressor control

Power distribution systems

Heating and cooling systems

Lighting control circuits

Pumps and fluid control systems

Industrial machinery

Energy management systems

High-power switching modules

Summary

The T9AS1D12-48 is a rugged 48VDC high-power SPST-NO PCB relay designed for switching heavy electrical loads up to 30A at 240VAC. With sealed construction, AgCdO contacts, and UL/CSA certification, it provides reliable and durable performance for industrial automation, HVAC systems, and high-power control applications.

What's in the box
1 x T9AS1D12-48 48VDC 30A PCB Power Relay SPST-NO High Current Sealed Relay