Part  UN1221 
Category  Discrete => Transistors => Bipolar => RETs (Resistor Equipped transistors) 
Title  RETs (Resistor Equipped transistors) 
Description  Marking = ;; V<SUB>CEO</SUB>(V) = 50 ;; I<SUB>C</SUB>(A) = 0.5 ;; P<SUB>T</SUB>(W) = 0.6 ;; R<SUB>1</SUB>(kW ) = 2.2 ;; R<SUB>2</SUB>(kW ) = 2.2 ;; Package = MA1 
Company  Panasonic Industrial Company/Electronic Components 
Datasheet  Download UN1221 datasheet

Quote 
Features, Applications 
Collector to base voltage Collector to emitter voltage Collector current Total power dissipation Junction temperature Storage temperature Parameter Collector cutoff current Emitter cutoff current UNR1222 UNR1223/1224Symbol ICBO ICEO IEBO VCBO VCEO hFE VCE(sat) VOH VOL fT R1 Conditions VCB = 0 VCE = 0 VEB = 0 VCE = 5mA VCC = 500 VCC = 500 VCB 1.0 0.22 Note) The part numbers in the parenthesis show conventional part number. 1.2 (+30%) MHz min typ max V mA Unit µA Collector to base voltage Collector to emitter voltage Forward UNR1221 current UNR1222 transfer UNR1223/1224 ratio Collector to emitter saturation voltage Output voltage high level Output voltage low level Transition frequency Input resistance UNR1222 UNR1223 Costs can be reduced through downsizing of the equipment and reduction of the number of parts. M type package allowing easy automatic and manual insertion as well as standalone fixing to the printed circuit board. 
Related products with the same datasheet 
UN1222 
UN1223 
UN1224 
UNR1221 
UNR1222 
UNR1223 
UNR1224 
Some Part number from the same manufacture Panasonic Industrial Company/Electronic Components 
UN1222 Marking = ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.5 ;; P_{T}(W) = 0.6 ;; R_{1}(kW ) = 2.2 ;; R_{2}(kW ) = 2.2 ;; Package = MA1 
UN1231 Marking = ;; V_{CEO}(V) = 20 ;; I_{C}(A) = 0.7 ;; P_{T}(W) = 0.01 ;; R_{1}(kW ) = 1 ;; R_{2}(kW ) = 0.021 ;; Package = MA1 
UN206 V_{CEO}(V) = 18 ;; I_{C}(A) = 1 ;; P_{T}(W) = 0.5 ;; Package = SO10G1 
UN2110 Marking = 6L ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.1 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 47 ;; R_{2}(kW ) = ;; Package = Mini3G1 
UN2121 Marking = 7A ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.5 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 2.2 ;; R_{2}(kW ) = 2.2 ;; Package = Mini3G1 
UN2154 Marking = ev ;; V_{CEO}(V) = 30 ;; I_{C}(A) = 0.1 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 10 ;; R_{2}(kW ) = 47 ;; Package = Mini3G1 
UN216 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 3/3 ;; P_{T}(W) = 0.5 ;; Package = SO14G1 
UN217 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 1/1 ;; P_{T}(W) = 0.5 ;; Package = SO10G1 
UN2210 Marking = 8L ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.1 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 47 ;; R_{2}(kW ) = ;; Package = Mini3G1 
UN222 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 3/3 ;; P_{T}(W) = 0.5 ;; Package = SO14G1 
UN2221 Marking = 9A ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.5 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 2.2 ;; R_{2}(kW ) = 2.2 ;; Package = Mini3G1 
UN2225 Marking = FZ ;; V_{CEO}(V) = 20 ;; I_{C}(A) = 0.6 ;; P_{T}(W) = 0.2 ;; R_{1}(kW ) = 10 ;; R_{2}(kW ) = ;; Package = Mini3G1 
UN225 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 0.5/0.5 ;; P_{T}(W) = 0.5 ;; Package = SO16G1 
UN227 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 1.5/1.5 ;; P_{T}(W) = 0.5 ;; Package = SO16G1 
UN228 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 1/1 ;; P_{T}(W) = 0.5 ;; Package = SO10G1 
UN230 V_{CEO}(V) = 10/10 ;; I_{C}(A) = 3/3 ;; P_{T}(W) = 0.5 ;; Package = SO10G1 
UN4110 Marking = ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.1 ;; P_{T}(W) = 0.3 ;; R_{1}(kW ) = 47 ;; R_{2}(kW ) = ;; Package = NSA1NSB1 
UN4121 Marking = ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.5 ;; P_{T}(W) = 0.3 ;; R_{1}(kW ) = 2.2 ;; R_{2}(kW ) = 2.2 ;; Package = NSA1NSB1 
UN4210 Marking = ;; V_{CEO}(V) = 50 ;; I_{C}(A) = 0.1 ;; P_{T}(W) = 0.3 ;; R_{1}(kW ) = 47 ;; R_{2}(kW ) = ;; Package = NSA1NSB1 
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