Medium Power Transistor TO-126 Pin Configuration: 1. Emitter 2. Collector 3. Base Feature: * * Epitaxial Silicon Power Transistors Intended for use in Medium Power Linear Switching Applications Absolute Maximum Ratings Description Symbol BD237 Collector-Base Voltage VCBO 100 Collector-Emitter Voltage VCEO 80 Collector Emitter Voltage (RBE = 1K) VCER 100 Emitter Base Voltage VEBO 5 Collector Current IC 2 Collector Peak Current ICM 6 Power Dissipation at TC = 25C Derate above 25C Unit V A 25 W 1.25 10 W mW/C Tj, Tstg -65 to +150 C Junction to Case Rth (j-c) 100 Junction to Ambient in Free Air Rth (j-a) 4.16 Power Dissipation at Ta = 25C Operating and Storage Junction Temperature Range PD Thermal Characteristics C/W www.element14.com www.farnell.com www.newark.com Page <1> 19/12/12 V1.0 Medium Power Transistor TO-126 Electrical Characteristics (TC = 25C unless specified otherwise) Description Symbol Test Condition Min. Typical Max. Unit Collector Cut off Current ICBO VCB = 100V, IE = 0 TC = 150C VCB = 100V, IE = 0 - - 100 2 A mA Emitter Cut off Current IEBO VEB = 5V, IC = 0 - - 1 mA Collector Emitter Sustaining Voltage *VCEO (sus) IC = 0.1A, IB = 0 80 - - Collector Emitter Saturation Voltage *VCEO (sat) IC = 1A, IB = 0.1A - - 0.6 *VBE (on) IC = 1A, VCE = 2V - - 1.3 *hFE IC = 150mA, VCE = 2V IC = 1A, VCE = 2V 40 25 - - - fT IC = 250mA, VCE = 10V 3 - - MHz Matched Pairs IC = 250mA, VCE = 2V - 1.6 - - Base Emitter Voltage DC Current Gain Current Gain Bandwidth Product *hFE1/hFE2 V *Pulse Test : Pulse Width = 300s, Duty Cycle = 1.5%. Pin Configuration: 1. Emitter 2. Collector 3. Base Dimensions Min. Max. A 7.4 7.8 B 10.5 10.8 C 2.4 2.7 D 0.7 0.9 E F Part Number Transistor, NPN, TO-126 BD237 0.75 4.5 (Typical) L 15.7 (Typical) M 1.27 (Typical) N 3.75 (Typical) S Description 0.49 G P Part Number Table 2.25 (Typical) 3 3.2 2.5 (Typical) Dimensions : Millimetres Important Notice : This data sheet and its contents (the "Information") belong to the members of the Premier Farnell group of companies (the "Group") or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group's liability for death or personal injury resulting from its negligence. Multicomp is the registered trademark of the Group. (c) Premier Farnell plc 2012. www.element14.com www.farnell.com www.newark.com Page <2> 19/12/12 V1.0