1. General Information & Ordering

️· Series: BC846A - BC848C (NPN bipolar junction transistors)
️· Package: SOT-23
️· Ordering: BC84xx-7* (where 'xx' designates the specific variant)
️· Datasheet Location: http://www.diodes.com/datasheets/ap02007.pdf for packaging details and http://www.diodes.com/datasheets/ap02001.pdf for pad layout.
️· Marking: Uses a combination of product type and date code. (See tables for mapping years and months to codes)

2. Electrical Characteristics (at 25°C unless otherwise stated)

️· Breakdown Voltages:
- *V(BR)CBO* (Collector-Base Breakdown): 80V (BC846), 50V (BC847), 30V (BC848)
- *V(BR)CEO* (Collector-Emitter Breakdown): 65V (BC846), 45V (BC847), 30V (BC848)
- *V(BR)EBO* (Emitter-Base Breakdown): 6V (BC846), 5V (BC847)
️· H-Parameters (Current Gain Subgroups):
- *hfe* (Current Gain): Values vary significantly between subgroups A, B, and C. Example for BC846: 220, 330, 600
- *hie* (Input Impedance): Values range from 2.7 to 8.7
- *hoe* (Output Admittance): Values range from 1.5x10^-4 to 3x10^-4
- *hre* (Reverse Voltage Transfer Ratio): Not provided, but listed as a parameter.
️· DC Current Gain (hFE):
- BC846: 110, 180
- BC847: 200, 290
- BC848: 420, 520, 800
️· Saturation Voltages:
- *VCE(SAT)*: Ranges from 90mV to 600mV, depending on the specific variant and collector current.
- *VBE(ON)*: BC846: 580mV; BC847: 660mV; BC848: 700mV, 770mV
️· Cutoff Current:
- *ICES*: Ranges from 5.0nA to 15nA (BC846-BC848)
️· Gain Bandwidth Product (fT): 100-300 MHz
️· Collector-Base Capacitance (CCBO): Around 3.0 pF
️· Noise Figure (NF): Varies from 2 to 10 dB.

3. Physical & Environmental Characteristics

️· Operating & Storage Temperature Range: -65°C to +150°C
️· Power Dissipation (Pd): 300 mW
️· Thermal Resistance (RθJA): 417 °C/W (mounted on FR-4 PCB)

Important Notes

️· Subgroup Variations: The current gain (hFE) varies significantly based on the subgroup (A, B, C). Group C isn't available for BC846.
️· Testing Conditions: Datasheet values are generally at 25°C. Performance may change with temperature.
️· Datasheet Reference: For complete specifications and packaging details, refer to the linked datasheets.



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