BF959ZL1G

Overview

The BF959ZL1G is an NPN silicon VHF transistor manufactured by onsemi, housed in a TO-92 (Case 29) package. It features a collector-emitter voltage of 20 Vdc and a continuous collector current of 100 mAdc. The device supports a total power dissipation of 625 mW at 25°C ambient temperature. Key electrical characteristics include a DC current gain ranging from 35 to 40 and a current-gain bandwidth product between 600 MHz and 700 MHz. Operating temperatures range from -55°C to +150°C.

Feature Summary

• Designed for VHF frequency applications with high current-gain bandwidth product
• Utilizes a standard TO-92 through-hole package configuration
• Capable of operation across a wide junction temperature range

Applications

• VHF amplifier circuits
• Local oscillator stages
• RF signal processing modules

Procurement Notes

Verify the specific ordering suffix ZL1G corresponds to the required 2000-unit ammo pack packaging format when sourcing components. Confirm that the Pb-Free designation aligns with environmental compliance requirements for the intended assembly process. Ensure the TO-92 pinout style matches the target schematic design before finalizing procurement orders.

Selection Notes

Select this component for designs requiring NPN amplification within the VHF spectrum. Evaluate the 625 mW thermal dissipation limit against the expected operating conditions to ensure adequate heat management. Compare the 20 V collector-emitter breakdown voltage against peak circuit voltages to prevent overstress during transient events.

Part Context

This part belongs to the BF959 series of VHF transistors produced by onsemi. The ZL1G suffix specifically denotes the Pb-Free variant packaged in an ammo pack format. It shares core electrical specifications with other BF959 variants while differing primarily in packaging and environmental compliance attributes.

Replacement Considerations

Direct substitutes must match the NPN silicon VHF specification and TO-92 package. Verify equivalent VHF performance metrics and thermal resistance values before implementation.