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Product Features

Potter & Brumfield PCB Power Relay
  • Save PCB space with the smallest relay in its class while maintaining standard footprint. 
  • Achieve a global relay solution with both UL, CQC and VDE certifications.
  • Help provide operator safety through increased insulation (UL 61810-1).
  • Increase relay performance through 4kV dielectric rating / 8kV surge voltage between coil and contacts


smaller than T9A


less energy


less PCB floor space

Smallest in class relay. Our Potter & Brumfield relay T9G series is the smallest relay in its class, with a 30 percent smaller package size and 13 percent less PCB floor space while keeping the standard footprint, allowing manufacturers to add more components on PCBs without having to compromise on relay performance. Its PCB and quick-connect terminations also make the relay user-friendly and easy to install. This series meets IEC 61810-1 for reinforced insulation due to its breakthrough design where the distance between coil and contacts has been increased, while the overall package is smaller. This helps prevent circuit flashover from control to load, resulting in a safer application.


  • HVAC
  • Appliances
  • Industrial Controls
  • Energy Management
  1. Potter & Brumfield relay T9G series product video

TE's Potter & Brumfield relay T9G series is a 30A Power PCB relay for HVAC, appliance and industrial control applications. Watch this video to find out more about the smallest relay in its class.


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Power Relay Type  Standard

Electrical Characteristics

  • Coil Magnetic System  Monostable, DC

  • Coil Power Rating Class (mW) 800 – 1000

  • Coil Power Rating DC (mW) 900

  • Coil Resistance (Ω) 28, 90, 160, 249, 360, 538, 640, 2560, 13444

  • Coil Special Features  UL Coil Insulation Class F

  • Coil Voltage Rating (VDC) 5, 9, 12, 15, 18, 22, 24, 48, 110

  • Contact Switching Load (Min)  100mA @ 12V

  • Contact Switching Voltage (Max) (VAC) 480

  • Contact Voltage Rating (VAC) 250

  • Insulation Initial Dielectric Between Contacts & Coil (Vrms) 4000

  • Insulation Initial Dielectric Between Open Contacts (Vrms) 1500

Body Features

  • Product Weight (g) 18, 23

  • Product Weight (oz) .635, .812

Contact Features

  • Contact Arrangement  1 Form A (NO), 1 Form B (NC), 1 Form C (CO)

  • Contact Current Class (A) 10 – 20, 20 – 30

  • Contact Current Rating (Max) (A) 20, 30

  • Contact Material  AgSnO

  • Contact Number of Poles  1

  • Relay Terminal Type  PCB-THT, Quick Connect

Termination Features

  • Relay Termination Type  .25 x .032 Quick Connect Terminals, Printed Circuit Terminals

Mechanical Attachment

  • Relay Mounting Type  Printed Circuit Board


  • Product Height (mm) 15.7, 27

  • Product Height (in) .618

  • Product Length (mm) 29, 32

  • Product Width (mm) 21.5, 25

  • Product Width (in) .846, .984

  • Width Class (Mechanical) (mm) 20 – 25

  • Dimensions (L x W x H) (Approximate) (mm) 29 x 21.5 x 15.7, 32 x 25 x 27

  • Dimensions (L x W x H) (Approximate) (in) 1.142 x .846 x .618, 1.260 x .984 x 1.063

  • Height Class (Mechanical) (mm) 15 – 16, 25 – 30

  • Length Class (Mechanical) (mm) 25 – 30, 30 – 35

Usage Conditions

  • Operating Temperature Range (°C) -40 – 105

  • Environmental Ambient Temperature (Max) (°C) 105, 85

  • Environmental Ambient Temperature (Max) (°F) 176, 221

Packaging Features

  • Packaging Method  Carton & Tube

Reference Number

  • TE Internal Number CAT-P851-T1

Related Materials

Datasheets & Catalog Pages

Terms and Conditions

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This information has been provided to your free of charge for your use but remains the sole property of TE Connectivity Corporation (''TE'') or SnapEDA,  Inc. or Ultra Librarian/EMA Design Automation, Inc. (collectively, "Company"). While Company has used reasonable efforts to ensure its accuracy, Company does not guarantee that it is error-free, not makes any other representation, warranty, or guarantee that the information is completely accurate or up-to-date. In many cases, the CAD data has been simplified to remove proprietary detail while maintaining critical interface geometric detail for use by customers. Company expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties or merchantability or fitness for a particular purpose.