12V Spdt PCB Mount 2a Super Miniature Relay​

12V SPDT PCB mounted 2A ultra-miniature relays have become a critical control element in today’s compact electronic equipment, with their superior miniaturized design ensuring high performance while achieving revolutionary space savings. Typically more than 50% smaller than conventional relays, these ultra-miniature relays are used in a wide range of high-density electronic systems because they maintain excellent electrical performance and mechanical reliability.

Product Benefits

1.Extreme space utilization (typical size is only 10 x 6 x 5mm)
2.Excellent electrical characteristics (contact resistance ≤ 100mΩ, insulation resistance ≥ 100MΩ)
3.Wide compatibility (12VDC±10% operating voltage range)
4.Reliable load capacity (2A/250VAC or 30VDC)

Product Category

1.Classification according to contact material

Silver alloy contacts: good conductivity, strong arc resistance
Gold contacts: low contact resistance, suitable for small signal switching.

2.Classification according to coil characteristics

Standard type: conventional power consumption design
Low power consumption type: energy-saving design, reducing the overall energy consumption of the system.
High sensitivity type: can work reliably under lower voltage.

3. Classified by package form

Fully sealed: dust and moisture resistant, suitable for harsh environments.
Semi-sealed: basic protection, low cost
Open type: good heat dissipation, suitable for conventional environment.

4. Classified by special function

With LED indication type: can visualize the working status.
With diode protection type: built-in diode to protect the driving circuit.
With surge suppression: to reduce the electromagnetic interference of the switching moment.

The Role of Relays

In modern electronic systems, the 12V SPDT ultra-miniature relay plays multiple critical roles due to its compact design and superior performance:

1.Electrical isolation barrier

As a safety barrier between the control circuit and the load circuit, complete electrical isolation is achieved. This isolation feature effectively protects the low-voltage control terminal from interference and damage from the high-voltage load terminal, ensuring safe and stable operation of the system.

2.Highly Reliable Signal Routing

In precision test instruments and communication equipment, the relay serves as a highly reliable electronic switch to ensure the precise switching of signal paths. Its ultra-miniature design is particularly suitable for high-density signal routing applications, while maintaining excellent signal integrity.

3.Compact Power Control

Despite its compact size, its 2A current carrying capacity makes it an ideal control element for small and medium power devices such as LED lighting arrays, micro motors and compact solenoid valves, perfectly balancing space constraints with power requirements.

4.Intelligent State Switching

SPDT single-pole, double-throw structure gives it unique bidirectional control capability, a single relay can realize: automatic switching of circuit state, alternate selection of dual-channel signals, and conversion of equipment operating modes.

5.Basic Logic Construction

Through the clever combination of relays, basic logic circuits such as AND, OR, etc. can be constructed to provide cost-effective solutions for simple automation systems, especially suitable for application scenarios that do not require complex programmable controllers.

6.System Safety Guard

The built-in quick cut-off mechanism makes it an effective circuit protection device, which can quickly cut off the connection when abnormal conditions are detected, and can effectively prevent, equipment overload damage, circuit short-circuit accidents, and system failures from expanding.

Working Principle

1.Electromagnetic drive system

When 12V DC voltage is loaded to the relay coil, the precision designed miniature electromagnetic system responds immediately:
The miniature coil made of high permeability alloy material generates a strong electromagnetic field.
Optimized winding process ensures maximum electromagnetic efficiency in limited space.
The electromagnetic suction force generated is precisely applied to the special alloy armature mechanism.

2.Precision Mechanical Transmission

The mechanical transmission system of the ultra-miniature relay embodies the essence of micromechanical engineering:
Adopting aerospace-grade precision spring system, the response time is <3ms.
Unique design of lever amplification mechanism increases the efficiency of electromagnetic force by 40%.
Super wear-resistant bearing structure ensures 10 million times mechanical life.

3.High performance contact system

SPDT contact set adopts innovative design:
Sandwich composite contact material (AgSnO2+Au plating)
Reed mechanism with special elastic design
Self-cleaning contact structure design
Contact pressure >50g to ensure low contact resistance

4.Co-operative workflow

Stationary state
High precision spring maintains NC contact closed
COM terminal and NC terminal maintain conduction
Static contact resistance <50mΩ
Excitation state (12V energized)
Electromagnetic force overcomes spring force within 5ms
Armature mechanism pushes contact switching
COM terminal establishes connection with NO terminal
Switching time <10ms
Reset process
Spring force resets the mechanism after power failure
Mechanical rebound time <8ms
Complete restoration of the initial contact state

With innovative magnetic circuit design, precise mechanical structure and advanced contact technology, this miniature relay realizes better performance in 1/3 of the volume of traditional relays, which is especially suitable for application scenarios with stringent space requirements, such as 5G devices and IoT terminals. The perfect synergy of all systems during its working process ensures reliable operation in -40℃~85℃ environment.

Specification

Core Electrical Characteristics

• Coil Parameters
• Rated voltage: 12VDC (±10% tolerance)
• Power consumption: 0.2W-0.5W (including energy-saving and standard types)
• Pick-up voltage: ≤9.6VDC (ensures reliable actuation)
• Drop-out voltage: ≥1.2VDC (guarantees complete reset)
• Contact Performance
• Contact resistance: Initial ≤50mΩ (≤100mΩ after 1 million operations)
• Dielectric strength: 1500VAC/1min between coil and contacts
• Insulation resistance: ≥1000MΩ (tested at 500VDC)

Load Capacity Parameters

Mechanical Specifications

• Dimensions
• Ultra-compact design: 10.0mm(L)×6.0mm(W)×5.0mm(H)
• Mounting: Supports both THT and SMD (optional)
• Pin configuration: Standard 2.54mm pitch (1.27mm high-density option available)
• Environmental Durability
• Operating temperature: -40℃～+85℃ (industrial grade)
• Storage temperature: -55℃～+105℃
• Protection rating: IP40 (standard)/IP67 (optional sealed version)
• Vibration resistance: Complies with IEC 60068-2-6
• Shock resistance: 100m/s² (meets MIL-STD-202G)

Reliability Indicators

• Mechanical Life
• Standard: ≥10 million operations (no load)
• Enhanced: ≥20 million operations (special mechanical design)
• Electrical Life
• Resistive load: ≥100,000 operations (at rated 2A)
• Inductive load: ≥50,000 operations (L/R=10ms)
• Low-level load: ≥500,000 operations (100mA@5VDC)

Representative Model Comparison

Note: All parameters measured at 25℃ ambient temperature. Derating recommended for actual operating conditions. Custom solutions available for special applications.

Diversified application scenarios of 12V SPDT PCB mounted 2A ultra-miniature relay

1.Communication infrastructure field

Ultra-miniature relays are widely used in 5G base station equipment, fiber optic network switches and programmable telephone systems, responsible for the precise routing of critical signals and interface switching. Their high reliability ensures the uninterrupted operation of communication networks 24/7, while the miniaturized design is perfectly adapted to the demand for high-density integration of modern communication equipment.

2.Consumer electronics field

From the temperature control system in smart home, security equipment to the program control of all kinds of home appliances, the load capacity of 2A enables it to directly drive the actuators in most household appliances. It is especially worth mentioning that in the IoT terminal equipment, the low-power characteristics of this relay and the wireless module are perfectly matched to realize the organic combination of remote control and local execution.

3.Industrial Automation

As the standard configuration of PLC output modules, they are responsible for converting control signals into device actions; in sensor networks, they assume signal conditioning and isolation and amplification functions. Even in harsh industrial environments, their operating temperature range of -40°C to +85°C ensures stable operation.
Automotive Electronics
From mode switching of in-vehicle infotainment systems, to control of comfort functions such as seats and mirrors, to signal processing of OBD diagnostic interfaces, they can be found everywhere. Products that meet automotive-grade vibration and temperature standards are also ideal for battery management systems in electric vehicles.

4.Medical electronics

These relays are widely used in portable monitors, diagnostic equipment and low-power therapeutic instruments due to their stable performance and ultra-small size. Fully sealed models can better meet the special needs of medical equipment sterilization.

5.Test and Measurement Instruments

Automatic Test Equipment (ATE) uses them to realize intelligent switching of multi-channel signals, while precision measuring instruments rely on them to complete the automatic conversion of ranges. High-precision contact performance ensures the accuracy of the measurement results, and fast response characteristics improve the testing efficiency.

6.New energy and power electronics field

Micro relays are used in solar energy controllers for charge/discharge management, in micro inverters for circuit topology switching, and in energy monitoring equipment for sampling control. Its excellent insulation can provide a reliable guarantee for system safety.

Summary:The 12V DC operating voltage design enables it to be perfectly adapted to most modern low-voltage control systems, while the 2A current carrying capacity provides a reliable switching solution for various types of small and medium power loads. In particular, its precise PCB mounting design not only simplifies the production assembly process, but also significantly improves the efficiency of automated production, becoming an indispensable standard component in modern electronics manufacturing.