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Product Detailed Parameters
- Description：45V 100MA 340MW TH TRANSISTOR-SM
- Series：BCY59
- Mfr：Central Semiconductor Corp
- Package：Box
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：700mV @ 2.5mA, 100mA
- Current - Collector Cutoff (Max)：10nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：180 @ 2mA, 5V
- Power - Max：340 mW
- Frequency - Transition：150MHz
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-206AA, TO-18-3 Metal Can
- Supplier Device Package：TO-18
- Grade：-
- Qualification：-
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Overview
The BCY59-VIII TIN/LEAD is a discontinued NPN silicon switching transistor manufactured by Central Semiconductor Corp. It utilizes a TO-18 metal can package with three leads. Key electrical ratings include a collector-base voltage of 45V, an emitter-base voltage of 7V, and a maximum continuous collector current of 100mA. The device supports a power dissipation of 340mW at 25°C, extending to 1W when mounted on the case. It features a transition frequency of 150MHz and operates within a junction temperature range of -65°C to +200°C.
Feature Summary
- NPN silicon construction designed for general-purpose switching applications
- TO-18 metal can package providing robust mechanical stability and thermal performance
- High transition frequency suitable for RF and high-speed switching circuits
Applications
- General-purpose signal amplification
- Low-power switching circuits
- RF amplifier stages
Procurement Notes
This component is officially listed as obsolete or discontinued by the manufacturer. Verification of availability requires checking distributor back-in-stock notifications or secondary market suppliers. Confirm RoHS compliance status and lead plating specifications (TIN/LEAD) against specific datasheet revisions before integration into new designs.
Selection Notes
Select this part only if legacy compatibility with existing TO-18 metal can footprints is required. For modern designs, consider surface-mount alternatives or plastic-packaged equivalents from the same family. Verify that the 100mA current limit and 45V voltage rating meet the specific circuit requirements without derating issues.
Part Context
The BCY59 series belongs to a lineage of small-signal NPN transistors historically produced by Philips Semiconductors and later Central Semiconductor. The BCY59-VIII variant specifically denotes the eighth revision or lot code within this product line. It serves as the NPN complement to the BCY79 PNP transistor, often used in matched pairs for differential or push-pull configurations.
Replacement Considerations
- BCY59-VII PBFREE
- BCY59-VI
FAQ
What is the pin configuration for the BCY59-VIII?
In the standard TO-18 package, Pin 1 is the Emitter, Pin 2 is the Base, and Pin 3 is the Collector, which is electrically connected to the metal case.
Is the BCY59-VIII RoHS compliant?
The specific suffix 'TIN/LEAD' indicates the presence of lead in the plating. While Central Semiconductor offers Pb-free versions (e.g., BCY59-VII PBFREE), the tin/lead variant typically does not meet RoHS standards.
