JZC-1M DPDT Relay Technical Parameters - Aviation Metal Sealed DPDT Relay JZC-1M 27V

JZC-1M DPDT Relay Technical Parameters: Complete Analysis for Dual-Channel Control Systems

When system design demands reliable control of two independent circuits with a single command signal, the DPDT (Double Pole, Double Throw) relay becomes an indispensable component. The JZC-1M Aviation Metal Sealed DPDT Relay, featuring a 27V coil, represents a high-reliability solution engineered for such dual-channel applications in demanding environments. This comprehensive technical analysis provides procurement managers and design engineers with detailed parameters, application insights, and validation data for integrating this component into critical systems for Aircraft Engine monitoring, Train signaling redundancy, and interface control for Solid State Relay for Drone power stages.

Understanding the DPDT Configuration: A Functional Powerhouse

The DPDT (2 Form C) configuration is the core of the JZC-1M's versatility. It incorporates two completely isolated sets of SPDT contacts operated by a single coil, enabling three primary functions:

1. Simultaneous Dual-Circuit Control: Switching two separate loads (e.g., an indicator lamp and a solenoid) with one control signal.
2. Redundant Changeover Switching: Automatically connecting a primary device to a circuit and a backup device to another, or switching between two sources and one load.
3. Polarity Reversal (H-Bridge Function): When wired appropriately, it can reverse the polarity across a DC load such as a small motor or actuator, a function often needed in Industrial Power Relay control panels.

This makes it significantly more capable than a simple PCB Signal Relay while being more compact and integrated than using two separate SPDT relays.

Comprehensive Technical Parameter Breakdown

The following parameters, verified under MIL-SPEC conditions, define the JZC-1M's operational envelope. All data is typical for the 27V DC coil variant at +25°C unless otherwise specified.

1. Coil Electrical Parameters (Control Characteristics)

2. Contact Parameters (Switching & Carrying Capacity)

3. Dynamic, Mechanical & Environmental Parameters

1. Operate Time (t_ON): ≤ 5 ms (at rated voltage, 25°C). Defines control system response speed.
2. Release Time (t_OFF): ≤ 3 ms. Important for sequencing and safety interlocks.
3. Bounce Time: < 1 ms (typical). Minimal bounce ensures clean switching and longer contact life.
4. Mechanical Life: > 1,000,000 operations (no load). Demonstrates durability of internal mechanism.
5. Electrical Life: > 100,000 operations at rated load (3A, 28VDC resistive). Validated functional lifespan.
6. Operating Temperature Range: -65°C to +125°C. Full performance across extreme aerospace and industrial environments.
7. Vibration Resistance: 10-500 Hz, 15g (MIL-STD-202 Method 214). Suitable for mounting in vehicles, Trains, and aircraft.
8. Shock Resistance: 50g, 11ms (MIL-STD-202 Method 213).
9. Weight: Approximately 15g. A consideration for weight-sensitive Aviation Contactor for Drone applications.

Industry Trend: Parameter Stability and Predictive Maintenance Readiness

There is a growing emphasis on parameter stability over the product's lifetime as a key differentiator. Unlike some commercial Automotive Relays or PCB Board Relays, the JRC-1M's hermetically sealed design ensures minimal drift in critical parameters like contact resistance and operate time due to environmental exposure. Furthermore, its consistent performance makes it an ideal candidate for integration into systems with predictive maintenance capabilities, where baseline parameters can be monitored for early signs of wear.

5 Critical Parameter Evaluations for Russian & CIS Technical Procurement

• Parameter Drift at Temperature Extremes: Require datasheet graphs or tables showing exact values for V_OP(MIN), t_ON, and R_CONT at -65°C and +125°C, not just a statement of functional operation.
• Inter-Pole Parameter Matching Specification: Maximum allowable difference in operate/release time and contact resistance between the two DPDT contact sets. Critical for synchronous switching in redundancy or H-bridge applications.
• Material Certification for Hermetic Seal Feedthroughs: Documentation on the glass-to-metal or ceramic-to-metal seal material and its compatibility with the metal can, ensuring long-term seal integrity against thermal cycling, a must for continental climates.
• Load-Specific Performance Data: Request specifications or application notes detailing performance when switching inductive loads (relay/solenoid coils) and lamp loads (high inrush), common in industrial and rail control panels.
• Certified Test Reports Aligned with GOST R 52931: Insist on test reports from accredited labs demonstrating the relay's parameters meet or exceed the relevant sections of GOST R 52931 or equivalent regional standards for relays.

YM's Symmetrical Manufacturing for Parameter Consistency

Guaranteeing the tight tolerances and matched performance of the two poles in a DPDT relay like the JZC-1M requires precision engineering. Within our 700,000 sq.m. advanced manufacturing facility, we utilize symmetric assembly jigs and laser-aligned placement systems. This ensures the two contact sets are assembled with identical geometry and spring forces. Automated test stations then measure operate time and contact resistance for each pole independently, verifying they fall within the strict matching tolerances. This level of control is what allows us to deliver the parameter consistency expected from a true High Quality Aviation component, supporting the needs of OEM/ODM Manufacturers in volume production.

R&D Innovation: Balanced Magnetic Circuit Design

Achieving matched performance between the two poles is an electromagnetic challenge. Our R&D team has developed a patented balanced magnetic circuit architecture. By optimizing the shape of the armature and the symmetry of the pole faces relative to the coil, we ensure that the magnetic force is distributed equally to both contact sets. This results in nearly simultaneous operation (within 0.2ms typical) and equal contact pressure, directly contributing to the published parameters for low, stable contact resistance and extended electrical life across both poles.

Application Guidelines Based on Technical Parameters

To design a reliable system around the JZC-1M's parameters, follow these steps:

1. Driver Circuit Design:
   • Ensure your driver can provide at least the Must Operate Voltage (18V) under worst-case conditions (minimum system voltage at cold temperature).
   • Always use a flyback diode (e.g., 1N4004) across the coil to suppress inductive voltage spikes.
2. Utilizing the DPDT Function:
   • For Redundancy: Wire the two poles in parallel to effectively double the current carrying capacity to 6A (carry) for a single circuit, or use one pole as primary and the other as backup on separate circuits.
   • For Motor Reversal (H-Bridge): Use standard H-bridge wiring. Ensure the motor's locked-rotor/stall current does not exceed the Contact Rating (3A).
3. Thermal Considerations:
   • When switching near the 3A rating on both poles simultaneously, consider the total power dissipation (I²R losses in contacts plus coil power) in board layout and enclosure cooling.
4. Protection for Inductive Loads: For loads like solenoid valves, use an RC snubber or a flyback diode across the load itself (if possible) to protect the relay contacts during break.

Standards Context: How Parameters are Defined and Verified

The JZC-1M's parameters are verified through the test suite mandated by MIL-PRF-6106 and aligned with IEC 61810-1. These standards do not just list parameters; they define the exact test conditions and methods. For example, "Operate Time" is measured from the moment a specified percentage (e.g., 90%) of the rated coil voltage is applied until the contact circuit is first closed. Understanding that the parameters are tied to these strict, repeatable protocols gives procurement managers confidence in their validity for system qualification.

Frequently Asked Questions (FAQ)

Q1: Can the two poles of the JZC-1M be used to switch an AC load on one pole and a DC load on the other?

A: It is technically possible but strongly discouraged from a reliability and specification standpoint. The relay is designed and its life ratings (Electrical Life parameter) are validated for DC switching. AC switching has different arc extinguishing requirements. Mixing load types complicates protection circuit design and makes it impossible to predict the relay's lifespan against the published DC parameters. For mixed AC/DC systems, use separate, appropriately rated relays or consult our application engineering team for a hybrid solution.