BC184L Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 45 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 130
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 4 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC184L is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.You can replace the BC184L with the 2N3417, 2N3711, 2SC1318-S, 2SC1384-S, 2SC1570, 2SC1570-F, 2SC1570-G, 2SC1570-H, 2SC1571, 2SC1571-F, 2SC1571-G, 2SC1571-H, 2SC1815GR, 2SC1815L, 2SC1842, 2SC1842E, 2SC1842F, 2SC1842P, 2SC1842U, 2SC1843, 2SC1843E, 2SC1843F, 2SC1843P, 2SC1844, 2SC1844E, 2SC1844F, 2SC1844P, 2SC1959-GR, 2SC2002-K, 2SC2002-L, 2SC2120-Y, 2SC2236-Y, 2SC2274-F, 2SC2277D, 2SC2310-C, 2SC2328A-Y, 2SC2396, 2SC2396-D, 2SC2396-E, 2SC2396-F, 2SC2458-BL, 2SC2458-GR, 2SC2500, 2SC2500-A, 2SC2500-B, 2SC2500-C, 2SC2500-D, 2SC2545, 2SC2545-D, 2SC2545-E, 2SC2545-F, 2SC2631-T, 2SC2634, 2SC2634-R, 2SC2634-S, 2SC2634-T, 2SC2710-Y, 2SC2785-EF, 2SC2785-FF, 2SC2785-HF, 2SC2785-JF, 2SC2785-KF, 2SC2960-F, 2SC2960-G, 2SC3114-S, 2SC3114-T, 2SC3114-U, 2SC3198-BL, 2SC3198-GR, 2SC3199-BL, 2SC3199-GR, 2SC3203-Y, 2SC3205-Y, 2SC3225, 2SC3243-E, 2SC3247, 2SC3247-H, 2SC3247-J, 2SC3330-S, 2SC3330-T, 2SC3330-U, 2SC3330-V, 2SC3331-S, 2SC3331-T, 2SC3331-U, 2SC3331-V, 2SC3382-S, 2SC3382-T, 2SC3382-U, 2SC3383-S, 2SC3383-T, 2SC3383-U, 2SC3940A-S, 2SC4208A-S, 2SC458-C, 2SC458-D, 2SC4682, 2SC536-F, 2SC536-G, 2SC536-H, 2SC536N, 2SC536N-F, 2SC536N-G, 2SC945K, 2SC945P, 2SC945Q, 2SD1207-S, 2SD1207-T, 2SD1207-U, 2SD1347S, 2SD1347T, 2SD1347U, 2SD1616, 2SD1616-K, 2SD1616-L, 2SD1616-U, 2SD1616A, 2SD1616A-K, 2SD1616A-L, 2SD1616A-U, 2SD1835-S, 2SD1835-T, 2SD1835-U, 2SD789-C, 2SD789-D, 2SD789-E, 2SD863-F, BC167B, BC167C, BC184LC, BC875, BC877, C1815BL, C1815GR, C945BL, C945GR, H945-K, H945-P, H945-Q, KSC1008CG, KSC1815GR, KSC1815L, KSC2328A-Y, KSC2500, KSC2500-A, KSC2500-B, KSC2500-C, KSC2500-D, KSC5019, KSC5019-L, KSC5019-M, KSC5019-N, KSC5019-P, KSC815CG, KSC945CG, KSC945CL, KSD1021-G, KSD1616, KSD1616-G, KSD1616-L, KSD1616-Y, KSD1616A, KSD1616A-G, KSD1616A-Y, KSD471ACG, KTC1008-GR, KTC3198BL, KTC3198GR, KTC3199BL, KTC3199GR, KTC3203Y, KTC3204Y, KTC3205Y, KTC3210Y, KTD863-GR, NTE192A or NTE199.