PK-5 Mini Signal Latching Relay – 2A 30VDC 8Pins for Precision Switching
Product Overview
The PK-5 series is a compact mini signal latching relay (bistable relay) designed for low-power, high-reliability applications. Rated at 2A 30VDC and available in an 8-pin DIP configuration, the PK-5 consumes only 0.3~0.43W coil power and maintains its contact state without continuous coil energization – ideal for battery-powered and energy-sensitive systems. This Latching Relay offers excellent low-level switching capability (10~50μA, 10~50mV), fast operate/release time (≤4ms), and hermetic sealing (≤10⁻³ Pa·cm³/s) for harsh environments. As a core member of YM’s precision relay family – which includes Metal Sealing Relay, Polarized Relay, PCB Board Relay, PCB Signal Relay, and Industrial Power Relay – the PK-5 is trusted in Aviation Electronics, smart meters, medical devices, and telecommunications equipment.
Technical Specifications
Coil Parameters (Latching Type)
- Coil power consumption: (0.3~0.43)W – pulse operation only
- Nominal coil voltage: 3V, 5V, 6V, 9V, 12V, 24V DC (specify when ordering)
- Incentive pulse width: (10～50) ms – sufficient to switch state
- Coil resistance: Refer to datasheet for exact values per voltage
Contact Ratings
- Maximum switching current: 2A at 30V DC (resistive load)
- Reference resistive load: 1A, 28V DC, 1×10⁵ operations
- Low level switching capability: (10~50)μA, (10~50)mV – 1×10⁵ operations, ideal for dry circuit applications
- Initial contact resistance: ≤50mΩ; after life test ≤200mΩ
Timing & Dielectric
- Action time (operate): ≤4ms (typical ≤3ms)
- Release time: ≤4ms
- Dielectric strength (normal atmosphere): 500Vr.m.s., 50Hz; under low pressure: 250Vr.m.s., 50Hz
- Insulation resistance (normal atmosphere): >500MΩ; after high-level life test: >50MΩ
Mechanical & Environmental
- Weight: <3g – ultra-light for PCB mounting
- Sealing (leakage rate): ≤10⁻³ Pa·cm³/s (hermetic, glass-to-metal seal)
- Operating temperature range: -40°C to +85°C
- Terminal style: 8-pin DIP (standard 2.54mm pitch)
All parameters are validated at 25°C ambient. The PK-5 meets MIL-R-39016/6 specifications for signal relay applications.
Product Images & Visuals
Above: PK-5 series latching relay in standard 8-pin DIP package. Contact YM for outline drawings and pad layout recommendations.
Key Features & Advantages
- True latching (bistable) operation: Dual-coil or single-coil with polarity reversal – retains contact state after pulse ends. Zero holding power consumption reduces system energy use by >90% compared to non-latching relays.
- Ultra-low coil power (0.3~0.43W): Compatible with battery-powered and energy-harvesting devices – ideal for remote sensors, IoT nodes, and portable instruments.
- Excellent low-level signal switching: Reliably switches dry circuits down to 10μA / 10mV – no contact oxidation or false openings, perfect for test & measurement and medical electronics.
- Hermetic sealing (≤10⁻³ Pa·cm³/s): Protects contacts from humidity, dust, and corrosive gases – ensures stable contact resistance over decades of service.
- Fast switching (≤4ms) & high insulation: 500Vrms dielectric strength and >500MΩ insulation resistance – suitable for isolating sensitive analog signals.
- Standard 8-pin DIP footprint: Drop-in replacement for many industry-standard signal latching relays (e.g., G6A, TQ2-L, etc.).
YM’s engineering advantage: The PK-5 leverages advanced magnetic circuit technology from our Polarized Relay and Military Metal Relay lines, ensuring consistent pull-in sensitivity and contact bounce <1ms. Compared to generic signal relays, the PK-5 offers superior sealing and wider temperature range, making it a preferred choice for aviation and defense contractors.
This relay complements YM’s broader portfolio, including New Energy Relay, Solid State Relay, and Automotive Relay. For high-reliability airborne systems, our Military Aviation Connector and Aviation Microswitch families provide complete signal chain solutions.
How to Use the PK-5 Latching Relay – Step by Step
- Identify coil configuration: The PK-5 is typically a dual-coil latching relay (set coil and reset coil) or single-coil with polarity-sensitive operation. Refer to the datasheet for your specific part number.
- Apply set pulse: To close the contacts (e.g., from common to NO), apply a DC voltage equal to the nominal coil voltage (e.g., 5V) to the set coil pins for 10-50 ms. Do not exceed the rated pulse width to avoid overheating.
- State retention: After the pulse ends, the relay remains in the closed state indefinitely without any coil power. This is the key advantage of a Latching Relay.
- Apply reset pulse: To open the contacts, apply a DC voltage (same nominal value) to the reset coil pins for 10-50 ms. The relay will return to its open state.
- Load connection: Connect your low-level signal or small power load (max 2A 30VDC) to the common and normally-open terminals. For dry circuit applications (μA/mV levels), no special contact treatment is needed – the PK-5’s gold-plated contacts ensure reliable switching.
- PCB mounting: Insert the 8-pin DIP package into a standard IC socket or solder directly to the PCB. Wave soldering is allowed (260°C max for 5 seconds).
Pro tip: If using a single-coil latching version, reverse the polarity of the pulse to reset the relay. A simple H-bridge driver or two MOSFETs can generate the bipolar pulse from a single supply.
Application Scenarios & Key Buyer Benefits
Typical High-Reliability & Low-Power Uses
- Avionics & military electronics: Hermetic sealing and wide temperature range make the PK-5 suitable for cockpit controls, radar systems, and missile guidance circuits.
- Smart energy meters (AMI): Latching operation allows utility meters to disconnect/reconnect power without draining the backup battery – extends battery life by years.
- Medical devices (patient monitors, infusion pumps): Low-level signal capability ensures accurate switching of ECG/EEG leads without introducing noise.
- Telecommunications & network switches: Bistable relays hold line configuration during power loss – critical for fail-safe operation.
- Industrial control & automation: PLC output modules, test equipment multiplexers, and data acquisition systems benefit from the relay’s long mechanical life (≥1×10⁷ operations).
Direct Value to International Buyers
- Energy savings: Zero holding power reduces overall system power consumption – especially valuable in battery-powered IoT sensors and remote monitoring stations.
- Simplified thermal management: No continuous coil heating allows dense PCB mounting without derating – lowers enclosure cooling costs.
- Reduced maintenance: Hermetic sealing eliminates contact contamination, ensuring stable contact resistance over >10⁵ switching cycles – lowers field service costs.
- Global regulatory acceptance: RoHS/REACH compliant, with test data supporting MIL-STD-202 environmental standards – smooth procurement for defense and aerospace contracts.
For design engineers, the PK-5 provides a drop-in upgrade from non-latching signal relays, instantly reducing power supply requirements and improving system reliability. YM’s in-house testing lab can provide custom life test data for your specific load profile.
Certifications & Compliance
- ISO 9001:2015 certified manufacturing – full quality management.
- RoHS 2011/65/EU & REACH (EC 1907/2006) compliant – full material declaration available.
- MIL-STD-202 test methods (vibration, shock, thermal cycling, moisture resistance) – data available upon request.
- UL 60950-1 recognized component (file pending for signal relay category).
- Hermeticity: Tested per MIL-STD-883, method 1014 – leakage rate ≤10⁻³ Pa·cm³/s.
Each production lot is 100% tested for coil resistance, pick-up/drop-out voltage (pulse method), contact resistance, and dielectric strength. Batch traceability is maintained through laser marking.
Customization Options
YM offers tailored versions of the PK-5 latching relay for volume OEM orders. Available modifications include:
- Coil voltage & type: Single-coil (polarity sensitive) or dual-coil (separate set/reset pins). Custom voltages: 3V, 6V, 9V, 12V, 24V, 48V DC.
- Contact material: Standard gold overlay (for low-level signals) or AgPd (for higher current / lower contact resistance).
- Terminal plating: Tin (standard), gold (for corrosion resistance), or solder-dipped.
- Sealing level: Hermetic (standard) or epoxy sealed (cost-effective for benign environments).
- Pin shape & length: Straight DIP, bent leads for surface-mount (gull-wing), or custom pin lengths.
- Marking: Custom part number, logo, or date code laser etching.
Our engineering team provides application notes and reference designs for driving latching relays with minimal components. Minimum order quantities apply – contact YM for details.
Production Process & Quality Assurance
YM’s signal relay production line is designed for precision and repeatability, combining automated assembly with rigorous in-process inspections.
- Incoming material control: 100% inspection of magnetic cores, copper wire, contact alloys, and glass-to-metal seals – sourced from certified partners.
- Coil winding & encapsulation: Toroidal winding with automatic resistance monitoring; vacuum encapsulation for void-free insulation.
- Contact assembly in Class 100 cleanroom: Precision adjustment of contact gap and overtravel using laser micrometer – ensures consistent contact resistance.
- Hermetic sealing & leak detection: Resistance welding under inert gas atmosphere; 100% helium mass spectrometry leak test (≤10⁻³ Pa·cm³/s).
- Dynamic functional test: Every relay is pulsed with set/reset voltages while measuring operate time, contact bounce, and contact voltage drop at 2A 30VDC.
- Environmental sample testing: Each batch undergoes thermal shock (-55°C to +125°C, 10 cycles), random vibration (20-2000Hz, 10g), and 1000-hour 85°C/85% RH life test.
With decades of experience in Signal Relay and Military Metal Relay manufacturing, YM applies aerospace-grade quality controls to the PK-5 series. Our zero-defect philosophy ensures that every relay performs reliably in mission-critical applications.
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