Overview
The 1-1840052-9 is a 2x1 integrated connector module (ICM) designed for Gigabit Ethernet applications, with LED indicators for network status monitoring. This compact, high-performance module integrates magnetics, RJ45 connectors, and signal conditioning into a single package, simplifying PCB design for networking equipment.
Key Specifications
| Parameter | Specification |
| Model | 1-1840052-9 |
| Configuration | 2x1 (Dual-Port) |
| Data Rate | 10/100/1000 Mbps (Gigabit) |
| LED Indicators | Integrated (Link/Activity) |
| Mounting Style | Through Hole Mount |
| Connector Type | RJ45 with Integrated Magnetics |
| Standards Compliance | IEEE 802.3ab (1000Base-T) |
| Isolation Voltage | ≥1500Vrms |
| Operating Temperature | 0°C to +70°C |
| Current Rating | 1.5A per port (typical) |
| Contact Material | Gold-plated copper alloy |
| Flammability Rating | UL94 V-0 |
Features
- Dual-Port Design: Supports two independent Gigabit Ethernet channels in a single module.
- Integrated Magnetics: Built-in transformers and common-mode chokes ensure EMI suppression and signal integrity.
- LED Status Indicators: Dual LEDs per port for link/activity monitoring (commonly green/orange).
- High-Speed Performance: Optimized for 1 Gbps full-duplex data transmission.
- Robust Construction: Gold-plated contacts and UL94 V-0 flame-retardant housing ensure durability and safety.
- RoHS Compliance: Lead-free and environmentally friendly.
- Packaging: Standard tape and reel packaging for SMD components.
1-1840052-9 Magjacks Drawing

Design Considerations
- PCB Layout: Ensure proper grounding and thermal management for high-speed signal integrity.
- LED Configuration: Verify resistor values for LED current limiting based on system voltage.
- PoE Support: Compatible with IEEE 802.3af/at standards if power delivery is required.