Factory sale T91 miniature power supply protective pcb relay

Quick Detail:

1. through-hole relay,PC board relay,sealed relay；
2. Switching loads on a printed circuit board
3. Signal switching
4. Isolation 5. Automation & control
5. Safety & protection

Description:

Small PCB Relay – High‑Power Switching with Superior Isolation for Industrial and Appliance Control

The Small PCB Relay series, available in 1H (SPST‑NO), 1D (SPST‑NC), and 1Z (SPDT) contact configurations, is a compact, board‑mountable switching solution designed for demanding applications that require handling of substantial loads. With contact capacities reaching up to 7200VA / 560W, a high dielectric strength of 2500VAC between coil and contacts, and a low coil power consumption of 0.9W, this relay series offers an exceptional combination of power handling, safety isolation, and energy efficiency. Its wide DC coil voltage range from 5V to 110V makes it compatible with a broad spectrum of control circuits. Ideal for industrial machinery, HVAC systems, power supplies, lighting control, and household appliances, this PCB relay delivers reliable performance in a space‑saving footprint.

Robust Contact Configurations for Diverse Load Requirements

The relay is offered in three distinct contact arrangements, each with tailored power ratings to match specific application needs.

· 1H Configuration (SPST‑NO – Single Pole Single Throw, Normally Open):
This version provides one normally open contact with an impressive contact capacity of 7200VA (e.g., 30A at 240V AC) or 560W (approximately 23A at 24V DC). It is ideal for switching high‑power loads such as industrial heaters, large motors, compressors, electric furnaces, and commercial lighting.
· 1D Configuration (SPST‑NC – Single Pole Single Throw, Normally Closed):
Featuring one normally closed contact, this variant is rated at 3600VA (15A at 240V AC) or 280W (approximately 11.7A at 24V DC). It is suitable for applications where the load should remain energized under normal conditions and be interrupted only upon relay activation, such as fail‑safe brakes, emergency disconnects, or auxiliary power circuits.
· 1Z Configuration (SPDT – Single Pole Double Throw):
This changeover contact version offers the flexibility of both a normally open and a normally closed path. The NO side is rated at 4800VA (20A at 240V AC) or 560W (23A at 24V DC), while the NC side is rated at 2400VA (10A at 240V AC) or 280W (11.7A at 24V DC). The 1Z configuration is perfect for applications requiring selection between two loads, such as motor direction control, primary/backup power routing, or signal switching.

All configurations maintain a low contact resistance of ≤50mΩ (measured at 1A, 24V DC). This ensures minimal voltage drop, reduced heat generation, and consistent long‑term performance. The contact material is chosen to withstand high inrush currents and arc erosion, making the relay reliable for switching motor, transformer, and capacitive loads.

Superior Dielectric Strength for Enhanced Safety

Safety and electrical isolation are paramount when switching high‑power circuits. This relay is engineered with outstanding isolation characteristics:

· Insulation resistance: 1000MΩ – ensures excellent isolation between coil and contacts as well as between open contacts.
· Dielectric strength between coil and contacts (BCC): 2500V AC for 1 minute – this high rating provides a large safety margin, making the relay suitable for applications where reinforced or double insulation is required, such as household appliances (IEC 60335‑1) and industrial control equipment.
· Dielectric strength between open contacts (BOC): 1500V AC for 1 minute – guarantees that when the contacts are open, there is no risk of breakdown or flashover, even in environments with voltage transients.

These specifications give designers confidence that the relay will maintain safe isolation even under fault conditions, protecting both the control circuit and the user.

Fast and Consistent Operating Times

The relay delivers an operate time of 15ms and a release time of 10ms. The relatively small difference between operate and release times provides predictable behaviour for sequencing and timing applications. The 15ms operate time ensures a quick response to control signals, while the 10ms release time allows rapid disconnection when needed, which is critical for:

· Motor starting and stopping cycles
· Heater duty‑cycle control
· Safety interlock circuits
· Load shedding during power disturbances

Low Coil Power for Energy‑Efficient Designs

With a nominal coil power of 0.9W across the entire DC voltage range, this relay is designed to minimize energy consumption and heat generation. The low coil power offers several benefits:

· Reduces thermal stress on densely populated PCBs
· Lowers the drive current required from microcontrollers, PLCs, or other logic devices
· Enables reliable operation in enclosed or fan‑less equipment
· Simplifies power supply design by avoiding high inrush currents typical of larger coils

For battery‑backed or green‑energy applications, the 0.9W consumption represents an excellent balance between providing sufficient magnetic force for high‑current switching and maintaining overall system efficiency.

Wide DC Coil Voltage Range for Global Compatibility

The relay series offers a comprehensive selection of DC coil voltages, covering the most common control voltages used worldwide. Available nominal voltages include 5V, 6V, 9V, 12V, 15V, 18V, 24V, 48V, 70V, and 110V DC. Each coil version is precisely specified with pull‑in and release voltages (e.g., 3.75V/0.5V for the 5V coil) and a coil resistance tolerance of ±10%. Coil resistance values range from 30Ω (5V) to 13,450Ω (110V).

The inclusion of a 70V coil is particularly useful for 48V nominal systems where the maximum DC voltage can reach 60‑70V, or for certain railway and telecom applications. The 110V coil is ideal for legacy industrial controls, rectified 110V AC systems, and high‑voltage DC applications. This wide voltage selection allows a single relay family to serve multiple product lines and international markets, reducing inventory complexity and design effort.

Compact PCB‑Mount Form Factor for High‑Density Assembly

Designed exclusively for PCB termination, the relay is soldered directly onto printed circuit boards. Its small footprint and low profile enable high component density, which is essential for modern compact electronics. The absence of a socket reduces assembly height, material cost, and potential points of failure. This makes the relay ideal for:

· High‑volume consumer electronics
· Space‑constrained industrial control modules
· Integrated power supply and inverter boards
· Smart home devices, smart meters, and IoT controllers
· Automotive and off‑highway vehicle electronics

Wide Range of Applications

The combination of high‑power switching, superior isolation, low coil power, and flexible contact configurations makes this PCB relay a versatile choice for numerous demanding applications:

· Industrial Machinery: Switching large contactors, motors up to 30A, solenoids, and heating elements.
· HVAC Systems: Compressor control (single‑phase up to 30A), fan speed switching, electric heater regulation, and zone valve actuation.
· Power Supplies & UPS: Output switching, input mains disconnect, battery charge/discharge path control, and inverter relay bypass.
· Lighting Control: Switching high‑wattage incandescent, LED, HID, or fluorescent lighting – the 1500V BOC rating ensures safe interruption of ballasts and drivers.
· Household Appliances: High‑power functions in ovens, water heaters, washing machines, dryers, and air conditioners.
· Industrial Automation: PLC output modules, timing relays, safety relays, and remote I/O switching.

Conclusion: A High‑Power, High‑Isolation PCB Relay for Demanding Switching Tasks

The Small PCB Relay series (1H/1D/1Z) delivers an exceptional blend of high contact capacity (up to 7200VA), excellent dielectric strength (2500V between coil and contacts), a wide DC coil voltage range (5‑110V), and low coil power (0.9W). Its compact PCB‑mount design allows easy integration into modern electronic assemblies while providing the ruggedness required for industrial and appliance environments. Whether you need a normally open contact for a 30A load, a normally closed contact for fail‑safe operation, or a changeover contact for load‑source selection, this relay family offers a configuration to meet your needs. Choose this relay for your next high‑power design and benefit from reliable switching, superior safety margins, and design flexibility.

Applications

1.home appliances (washing machines, air conditioners),
2.office equipment (printers, copiers),
3.industrial PLCs,
4.battery management systems,
5.automotive modules.

Specifications:

Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership

With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications

Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability

Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.