Product Overview
The Fairchild Semiconductor ES1G is a high-speed silicon rectifier diode designed for general-purpose switching and rectification applications. It is particularly suited for use in low voltage, high-speed switching circuits due to its fast recovery time and low forward voltage drop. The device is widely used in power supplies, voltage clamping, freewheeling diodes, and polarity protection circuits.

Device Structure and Configuration
The ES1G is a single diode packaged in the popular DO-41 axial lead format. It provides a simple, robust solution for rectification needs in compact designs.

* Device Type: Single diode
* Package Type: DO-41 axial lead
* Polarity: Standard diode with anode and cathode terminals

Electrical Characteristics
The ES1G offers excellent performance characteristics for fast switching and low forward conduction losses, making it ideal for efficient power conversion and signal protection.

* Maximum Repetitive Peak Reverse Voltage (VRRM): 50 V
* Maximum RMS Voltage (VRMS): 35 V
* Maximum DC Blocking Voltage (VDC): 50 V
* Forward Continuous Current (IF): 1 A (average forward current)
* Non-Repetitive Peak Forward Surge Current (IFSM): 30 A (8.3 ms single half sine-wave)
* Forward Voltage Drop (VF):
– Typical 1.1 V at IF = 1 A
– Maximum 1.25 V at IF = 1 A
* Reverse Current (IR):
– Typical 25 µA at VR = 25 V
– Maximum 100 µA at VR = 25 V and TA = 25°C

Switching and Recovery Characteristics
The diode features fast recovery time suitable for high-speed switching applications, minimizing switching losses and electromagnetic interference.

* Reverse Recovery Time (trr): 35 ns typical
* Junction Capacitance (Cj): 20 pF typical at VR = 4 V, f = 1 MHz

Thermal and Power Ratings
The ES1G is rated for operation over a wide temperature range with moderate power dissipation capabilities, making it versatile for a variety of environments.

* Operating Junction Temperature (TJ): –65°C to +150°C
* Storage Temperature (Tstg): –65°C to +150°C
* Power Dissipation (PD): 3 W (at TA = 75°C)
* Thermal Resistance, Junction-to-Ambient (RθJA): Approximately 75°C/W (free air)

Mechanical and Packaging Details
The DO-41 package provides robust mechanical protection and compatibility with through-hole mounting on printed circuit boards, supporting manual and automated assembly processes.

* Package Dimensions: Typical DO-41 (approx. 4.5 mm diameter, 25 mm length including leads)
* Lead Material: Tin-plated copper
* Mounting Type: Through-hole
* Marking: Standard diode marking with part number

Applications
The ES1G diode is widely used in various electronic systems requiring efficient, high-speed switching and rectification.

* Switching power supplies
* Voltage clamping and protection circuits
* Freewheeling diode in motor control and relay circuits
* Reverse polarity protection
* High-frequency rectification in communication devices

Reliability and Compliance
The device meets industry-standard reliability and quality benchmarks for commercial and industrial applications.

* ESD Protection: Meets typical industry standards
* RoHS Compliance: Yes (lead-free and halogen-free versions available)

Summary of Key Specifications

* Maximum Repetitive Peak Reverse Voltage (VRRM): 50 V
* Maximum Forward Current (IF): 1 A continuous
* Forward Voltage Drop (VF): 1.1 V typical at 1 A
* Reverse Recovery Time (trr): 35 ns typical
* Power Dissipation: 3 W
* Package: DO-41 axial lead
* Operating Temperature Range: –65°C to +150°C

The Fairchild Semiconductor ES1G diode offers a reliable, cost-effective solution for fast switching and rectification in low voltage power electronics. Its balance of fast recovery, low forward voltage, and robust package design makes it suitable for a wide array of commercial and industrial applications where efficiency and durability are essential.