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L91H-CS-DC12V (T91) Power Relay – 12V DC 30A High-Capacity 5-Pin PCB Mount Relay for Industrial HVAC, Heavy Appliances, and Power Controllers

Parameter	Detailed Specification
Model	L91H-CS-DC12V (T91 Style)
Coil Voltage	12V DC
Contact Rating	30A @ 240V AC / 30A @ 30V DC
Contact Configuration	1 Form C (SPDT)
Pin Count	5 Pins
Terminal Type	PCB Mount (T-Type Layout)
Switching Power	7200 VA (Max)
Insulation Resistance	1000 MΩ (at 500V DC)

Price

🚚 Ships within 24 Hours
📦 Pan India Delivery

₹ 50.85

(Tax included)

Barcode: 378287

Product Description

Manage high-current loads with industrial-grade reliability using the L91H-CS-DC12V (T91) Power Relay. This high-capacity electromagnetic relay is engineered to switch up to 30A, making it a critical component for heavy-duty applications such as HVAC systems, industrial motor controllers, and large home appliances. Featuring a standard T91 PCB mount footprint, it offers a robust 5-pin SPDT (Single Pole Double Throw) configuration. At Robogears, we recommend this relay for its superior insulation properties and high dielectric strength, ensuring safe and consistent operation in power-intensive environments like your industrial control panels or automated power stabilizers.

Detailed Key Features

High-Current Switching: Rated for a massive 30A, allowing it to safely handle high-wattage loads like water heaters, air conditioners, and industrial pumps.
12V DC Low-Power Coil: Easily triggered by standard 12V control circuits, including those powered by transistors or regulated power supplies.
Versatile SPDT Configuration: The 5-pin 1 Form C layout provides both Normally Open (NO) and Normally Closed (NC) contacts for complex logic switching.
Industrial Build Quality: Encased in high-temp resistant plastic with heavy-duty silver alloy contacts to minimize arcing and ensure a long mechanical life.
T91 Standard Footprint: Designed for direct PCB mounting, saving space while providing the physical stability needed for high-power connections.

All Technical Details

Dielectric Strength: 2500V AC (between coil and contacts).
Operating Time: ≤ 15 ms.
Release Time: ≤ 10 ms.
Mechanical Life: 10,000,000 operations.
Coil Power Consumption: Approx. 0.9W.
Dimensions: Approx. 32.5 mm x 27.5 mm x 20.5 mm.

Prototyping & Engineering Tips (Robogears Exclusive)

Trace Width Warning: When designing a PCB for 30A at your Pimpri workshop, standard copper traces are not enough. You must use extremely wide traces, often reinforced with thick solder or soldered copper bus bars, to prevent the PCB itself from burning.
Flyback Protection: Always connect a diode (like the 1N4007) in reverse-parallel across the 12V coil (Pins 1 and 2). This prevents the "inductive kick" from destroying your driving transistor or microcontroller when the relay switches off.
Contact Arcing: If switching high-inductive loads (like large motors), consider adding a snubber circuit (RC network) across the contacts to suppress arcing and extend the relay's life.
Soldering Tip: Due to the large thermal mass of the 30A pins, use a high-wattage soldering iron (like our 60W model) to ensure a solid, low-resistance solder joint that won't heat up under load.

Package Includes

1 x L91H-CS-DC12V (T91) 30A Power Relay

Image Disclaimer

Product images are shown for illustrative purposes only. The colour of the casing (typically Black or Blue) or the branding text may vary between batches, though all technical specifications and the 30A/12V rating remain as described.