Latching relay JMX-94F-A-Z-D

Product Overview

The JMX-94F-A-Z-D is a high‑capacity Latching Relay (bistable) rated at 100A continuous, designed for power‑sensitive applications such as EV chargers, battery energy storage systems (BESS), industrial power controllers, and heavy‑duty electronic control boxes. Unlike conventional relays, this Latching relay requires only a short pulse (10‑50ms) to change state and then maintains its position with zero holding power – dramatically reducing energy consumption and heat buildup. The JMX‑94F features ultra‑low coil consumption (0.3–0.43W per pulse), fast switching (≤4ms), and a hermetically sealed construction (leakage ≤10⁻³ Pa·cm³/s) for reliable operation in harsh environments. As a core member of YM’s Latching relay and Industrial Power Relay families, the JMX-94F is trusted by system integrators for solar inverters, DC grid protection, and high‑current switching where power efficiency is critical.

Technical Specifications

Main Contact Ratings (High Current – 100A)

• Contact configuration: SPST normally open (1 Form A)
• Continuous current rating: 100A at 28V DC / 250V AC (resistive load)
• Inrush current capability: 300A for 10ms (motor / capacitive load)
• Initial contact resistance: ≤50mΩ; after life test ≤200mΩ

Coil Parameters (Latching, 12V / 24V / 48V DC)

• Coil power consumption (pulse): (0.3–0.43)W – ultra‑low for a 100A latching relay
• Incentive pulse width: (10–50) ms – set or reset pulse
• Coil voltage options: 12V DC, 24V DC, 48V DC (specify when ordering)
• Coil resistance (24V version): Approx. 1300–1900Ω at 25°C

Low‑Level Signal Capability (Auxiliary Contacts)

• Switching capability (low level): (10–50)μA, (10–50)mV – 1×10⁵ operations, ideal for status feedback circuits
• Reference load (test condition): 1A, 28V DC, 1×10⁵ operations

Dielectric & Insulation

• Dielectric strength (normal atmosphere): 500Vrms, 50Hz between contacts and case; under low pressure: 250Vrms
• Insulation resistance: >500MΩ at 500V DC (initial); after life test >50MΩ

Mechanical & Environmental

• Mechanical life: 1×10⁵ cycles (min.) at rated load
• Weight: <3g – ultra‑light for a 100A relay
• Sealing (leakage rate): ≤10⁻³ Pa·cm³/s (hermetic, glass‑to‑metal seal)
• Operating temperature: -40°C to +85°C (extended -55°C to +125°C optional)
• Vibration resistance: 10g RMS, 10‑2000Hz per MIL‑STD‑810
• Terminal style: PCB through‑hole or quick‑connect (2 power terminals + 2 coil terminals)

All parameters are validated at 25°C ambient. The JMX‑94F meets IEC 61810‑1 and automotive AEC‑Q200 requirements for high‑current latching relays.

Product Images & Visuals

Above: JMX‑94F series 100A latching relay – external view, internal magnetic structure, and dimensional drawing. Contact YM for detailed CAD models and wiring diagrams.

Key Features & Advantages – Zero Holding Power, 100A Capacity

• True latching (bistable) operation: After a short pulse (10‑50ms), the relay remains in the set or reset state with zero coil power consumption – eliminates continuous coil heating and saves energy in battery‑backed systems.
• High current rating (100A continuous): Handles heavy loads such as EV battery main contactors, solar array disconnect, and industrial inverters – reduces system component count.
• Ultra‑low pulse power (0.3–0.43W): Allows direct drive from microcontrollers or low‑power logic, no bulky coil drivers needed – simplifies PCB design.
• Hermetic sealing (≤10⁻³ Pa·cm³/s): Glass‑to‑metal seal protects against moisture, dust, and corrosive atmospheres – ideal for outdoor power controllers and marine applications.
• Fast switching (≤4ms) & high isolation: 500Vrms dielectric strength ensures safety between coil and high‑power contacts.
• Low contact resistance & long life: ≤50mΩ initial resistance minimizes power loss; 1×10⁵ electrical cycles at 100A ensures years of maintenance‑free operation.

YM’s engineering advantage: The JMX‑94F leverages advanced magnetic circuit technology from our Polarized Relay and Military Metal Relay families, scaled for 100A continuous duty. Compared to non‑latching contactors, this relay reduces system energy consumption by >95% in standby, making it the preferred choice for New Energy Relay applications and Industrial Power Relay designs. For complete power control, YM also offers PCB Board Relay, Automotive Relay, and Solid State Relay – a one‑stop source for all switching needs.

How to Use the JMX-94F 100A Latching Relay – Step by Step

1. Determine coil voltage and polarity: The JMX‑94F is a dual‑coil latching relay (set and reset coils). Refer to the datasheet for pin assignment (coil A, coil B, common).
2. Apply set pulse: To close the 100A contacts, apply a DC pulse equal to the nominal coil voltage (e.g., 24V) for 10‑50ms to the set coil pins. Do not exceed 50ms to avoid overheating.
3. State retention: After the pulse ends, the relay remains closed indefinitely with zero coil power – ideal for battery‑powered systems.
4. Apply reset pulse: To open the contacts, apply a DC pulse (same voltage and duration) to the reset coil pins. The relay will open and stay open.
5. Load connection: Connect the high‑current load (e.g., battery positive) to one power terminal and the load (inverter, charger) to the other. Use appropriate wire gauge (6‑8 AWG for 100A).
6. Functional test: Apply set pulse and measure voltage drop across the power contacts (<50mV at 100A). Apply reset pulse and verify open‑circuit insulation >10MΩ.

Pro tip for system integrators: For fail‑safe designs, use a capacitor discharge circuit to generate the set/reset pulse from a low‑voltage battery – the JMX‑94F’s low energy requirement (under 0.5W·s per pulse) allows many operations from a small supercapacitor.

Application Scenarios & Key Buyer Benefits

Typical High‑Current Applications

• Electric vehicle (EV) charging stations: Main contactor for DC fast chargers – zero holding power reduces thermal load and energy waste.
• Battery energy storage systems (BESS): Parallel / series switching of battery banks; latching maintains state during power outages.
• Solar photovoltaic (PV) inverters: DC disconnect for safety – can be triggered by microcontroller and holds without power.
• Industrial power supplies & UPS: Input/bypass switching for high‑current AC/DC circuits – reduces power consumption in standby mode.
• Electronic controller boxes & automation: Remote load switching in smart grid equipment, railway signaling, and pumping stations.

Direct Value to International Buyers (OEMs, System Integrators, Distributors)

• Energy savings: Zero holding power eliminates continuous coil losses – especially critical for solar‑powered and battery‑backed systems.
• Reduced heat & cooling costs: No coil heating allows placement of multiple relays in sealed enclosures without derating.
• Lower maintenance & longer life: Hermetic sealing prevents contact oxidation; latching action eliminates contact chatter.
• Global compliance: RoHS, REACH, and IEC 61810‑1 certified; UL recognition pending – ready for worldwide distribution.

For custom control boxes, YM offers pre‑tested relay modules with integrated drivers and flyback protection. Engineering samples available for qualification.

Certifications & Compliance

• IEC 61810-1 (electromechanical relays – general requirements).
• IEC 60947-5-1 (low‑voltage switchgear and control gear).
• RoHS 2011/65/EU & REACH (EC 1907/2006) compliant – full material declaration available.
• ISO 9001:2015 & IATF 16949 certified manufacturing (automotive/industrial quality).

Each JMX‑94F relay is 100% tested for coil resistance, set/reset voltage, contact resistance at 100A, dielectric strength, and insulation resistance. Lot traceability is maintained per IATF 16949. Certificates of Conformance (CoC) and test data are provided with every shipment.

Customization Options

YM supports tailored JMX‑94F variants for volume ODM/OEM orders. Customizations include:

• Coil voltage: 5V, 12V, 24V, 48V DC, or isolated dual coils.
• Contact material: AgSnO₂ (standard for 100A), AgCdO (for DC inductive loads), or gold overlay (for low‑level auxiliary contacts).
• Terminal style: PCB pins, 6.3mm quick‑connect, or threaded studs (M5/M6) for heavy wires.
• Sealing level: IP67 (waterproof) or IP69K (high‑pressure washdown) – optional epoxy sealing.
• Auxiliary contacts: Add one or two SPDT signal contacts (1A) for status feedback.
• Marking: Laser engraving of customer part number, voltage, and date code.

Our engineering team provides free feasibility analysis and samples for qualified projects. Minimum order quantities apply – contact YM with your specification sheet.

Production Process & Quality Assurance (IATF 16949)

YM’s high‑current latching relay production line follows a zero‑defect, fully traceable process designed for automotive and industrial reliability.

• Raw material control: 100% verification of magnetic alloys, silver‑tin oxide contacts, copper terminals, and coil wire – traceable to batch certificates.
• Coil winding & encapsulation: Precision winding with automated resistance monitoring; vacuum encapsulation using high‑temperature epoxy.
• Contact assembly in Class 100 cleanroom: High‑force riveting and gap adjustment; dynamic contact resistance measurement at 100A.
• Hermetic sealing & leak detection: Ultrasonic welding or epoxy sealing; 100% helium leak test (sensitivity 10⁻⁹ Pa·cm³/s).
• 100% functional test: Automated test system (ATS) measures set/reset voltage, operate/release time, contact voltage drop at 100A, insulation resistance, and dielectric strength.
• Environmental sample testing: Each lot undergoes thermal shock (-40°C to +85°C, 20 cycles), vibration (10g RMS), and life cycle test (10⁵ operations at 100A).
• Final documentation: Electrical test records, C of C, and (if required) First Article Inspection reports per customer specification.

With decades of experience in Latching relay and Industrial Power Relay manufacturing, YM has supplied millions of high‑current relays to global customers in energy storage, EV infrastructure, and industrial automation. The JMX‑94F is built to exceed the reliability demands of the most critical high‑power applications.