T90 Mini Relay 5v and T95 ,T73 Electric 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
6. Safety & protection

Description:

Small PCB Relay – High Power Switching in a Compact Form Factor

In the realm of electronic and industrial control systems, the ability to switch substantial loads from a compact, board‑mountable device is a frequent design requirement. The Small PCB Relay series, offered in 1H/1D (SPST‑NO / SPST‑NC) and 1Z (SPDT) contact configurations, is engineered to deliver exceptional power handling capability within a space‑efficient package. With impressive contact ratings of up to 7200VA / 560W, a very high dielectric strength of 2500VAC between open contacts, low coil power consumption of 0.9W, and a wide DC coil voltage range from 5V to 110V, this relay series is an excellent choice for applications demanding reliable switching of high‑power loads – including industrial machinery, HVAC systems, power supplies, lighting control, and household appliances.

Versatile Contact Configurations for Demanding Loads

The relay is available in two primary contact arrangements, each offering different power ratings to suit specific application needs.

· 1H Configuration (SPST‑NO – Single Pole Single Throw, Normally Open):
This version features one normally open contact, with a remarkable contact capacity of 7200VA (240V AC × 30A) or 560W (24V DC × 23.3A). The actual current rating is derived from the VA/W figures: at 240V AC, it can handle 30A; at 24V DC, approximately 23A. This makes it ideal for switching high‑power resistive or inductive loads such as industrial heaters, large motors, compressors, and commercial lighting.
· 1D Configuration (SPST‑NC – Single Pole Single Throw, Normally Closed):
This version features one normally closed contact, rated at 3600VA (240V AC × 15A) or 280W (24V DC × 11.7A). It is suitable for applications where the load should be normally energized and only interrupted when the relay is activated, such as fail‑safe brakes, safety circuits, or auxiliary power disconnect.
· 1Z Configuration (SPDT – Single Pole Double Throw):
This variant provides one changeover contact (common, normally open, normally closed). The power ratings are 4800VA (240V AC × 20A) or 560W (24V DC × 23.3A) for the NO side, and 2400VA (240V AC × 10A) or 280W (24V DC × 11.7A) for the NC side. The 1Z configuration offers maximum flexibility, allowing the relay to switch between two loads or provide both a “make” and “break” circuit, such as direction control for motors or selecting between primary and backup power sources.

All configurations maintain a low contact resistance of ≤50mΩ (measured at 1A, 24V DC). This ensures minimal voltage drop across closed contacts, reduces heat generation, and contributes to overall system efficiency and long‑term reliability. The contact material is selected to withstand high inrush currents and arc erosion, making the relay suitable for switching a wide variety of loads, including motors, transformers, and capacitive power supplies.

Exceptional Dielectric Strength for High‑Voltage Isolation

Safety and isolation are critical in any electrical installation, and this relay is designed to meet stringent requirements. It offers a high insulation resistance of 1000MΩ, ensuring excellent isolation between coil and contacts as well as between open contacts.

The dielectric strength ratings are particularly noteworthy:

· Between Coil and Contacts (BCC): Withstands 1500V AC for 1 minute. This provides safe separation between the low‑voltage control circuit and the high‑power switched circuit.
· Between Open Contacts (BOC): Withstands 2500V AC for 1 minute. This high rating is a key differentiator, ensuring that when the contacts are open, there is no risk of breakdown or flashover even in applications with high transient overvoltages. This is especially important in industrial environments where voltage spikes are common.

These robust isolation characteristics make the relay suitable for use in equipment that must comply with international safety standards, such as IEC 60947‑5‑1 for industrial control gear and IEC 60335‑1 for household appliances.

Fast and Balanced Operating Times

In many control applications, predictable and fast switching is essential. This relay delivers an operate time of 15ms and a release time of 10ms. The difference between operate and release times is kept relatively small, allowing for consistent behaviour in sequencing logic. The 15ms operate time ensures that the relay responds quickly to control signals, while the 10ms release time provides a rapid disconnection when the coil is de‑energized. This balanced performance is particularly valuable in applications such as:

· Motor starting and stopping
· Heater duty cycle control
· Safety interlock circuits
· High‑frequency switching (within the relay’s mechanical limits)

Low Coil Power Consumption for Efficient Designs

The relay is designed with energy efficiency and low heat generation in mind. Its nominal coil power is 0.9W across the entire DC voltage range. This moderate power draw offers several benefits:

· Reduces heat buildup on densely populated PCBs
· Minimises the load on driving circuits (microcontrollers, PLCs, or dedicated drivers)
· Allows for reliable operation in enclosed or fan‑less equipment
· Simplifies power supply design by avoiding large inrush currents often associated with higher‑power coils

For battery‑backed or energy‑sensitive applications, the 0.9W consumption is a good 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 an exceptionally broad selection of DC coil voltages, covering common logic, control, and industrial supply voltages. 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 notable, as it allows the relay to be used in 48V nominal systems where the maximum voltage can reach 60‑70V, or in industrial control circuits with higher DC supplies. The 110V coil is ideal for legacy control systems that use 110V DC as a standard, as well as for applications derived from rectified 110V AC supplies. This wide voltage selection ensures that a single relay family can serve multiple product lines and global markets, reducing inventory complexity and design effort.

Compact PCB‑Mount Form Factor for High‑Density Assembly

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

· High‑volume consumer electronics
· Space‑constrained industrial control modules
· Integrated power supply boards
· Smart home devices and smart meters
· Industrial machinery control panels

Wide Range of Applications

The combination of high power switching capability, excellent dielectric strength, low coil power, and flexible contact configurations makes this PCB relay ideal for numerous demanding applications:

· Industrial Machinery: Switching large motors, solenoids, contactor coils, and heating elements – handling up to 7200VA (30A at 240V AC).
· HVAC Systems: Compressor control, fan speed switching, electric heater regulation, and zone valve actuation.
· Power Supplies and UPS Systems: Output switching, input disconnection, battery charge/discharge path control, and protection circuits.
· Lighting Control: Switching high‑wattage incandescent, halogen, LED, or HID lighting – the 2500V BOC rating ensures safe interruption of inductive ballasts.
· Household Appliances: High‑power functions in washing machines, dryers, ovens, water heaters, and air conditioners.
· Industrial Automation: PLC output modules, timing relays, safety circuits, and interface switching for remote I/O.

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

The Small PCB Relay series (1H/1D/1Z) offers a compelling combination of exceptional contact power (up to 7200VA/560W), very high dielectric strength between open contacts (2500V AC), a wide DC coil voltage range (5‑110V), and moderate coil power consumption (0.9W). Its compact PCB‑mount form factor makes it easy to integrate into modern electronic assemblies while providing the ruggedness required for industrial environments. Whether you need a single normally open contact to switch a 30A load, a normally closed contact for fail‑safe braking, or a changeover contact for load‑source selection, this relay family has a configuration to meet your needs. Choose this relay for your next high‑power design and benefit from reliable performance, 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.