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Infineon Technologies BCR166E6327 — Discrete Semiconductors
Infineon Technologies

BCR166E6327 PNP Pre-Biased Transistor, 50 V, 100 mA

MPNBCR166E6327
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Infineon BCR166E6327 PNP pre-biased transistor, 50 V VCEO, 100 mA IC, 160 MHz fT, 4.7 kΩ base resistor, 47 kΩ emitter-base resistor, PG-SOT23-3-11 package.

BCR166E6327 datasheet
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Specifications

BCR166E6327 Technical Specifications
ParameterValue
Mounting typeSurface Mount
FET typePNP - Pre-Biased
Voltage - collector emitter breakdown50 V
Current - collector (Ic)100 mA
Current - collector cutoff100nA (ICBO)
DC current gain (hFE) (Min) @ ic, vce70 @ 5mA, 5V
Power - max200 mW
Frequency160 MHz
PackageBulk
CaseTO-236-3, SC-59, SOT-23-3
Resistor - base (R1)4.7 kOhms
Resistor - emitter base (R2)47 kOhms
Vce saturation (Max) @ ib, ic300mV @ 500µA, 10mA

Product details

Pre-biased PNP in a SOT-23-3 — what it saves on the board

The Infineon BCR166E6327 is a PNP pre-biased transistor in a PG-SOT23-3-11 package. It integrates a 4.7 kΩ base resistor (R1) and a 47 kΩ emitter-base resistor (R2) so the design skips two external passives per switching node. Collector-emitter breakdown is rated at 50 V, continuous collector current at 100 mA, and the transition frequency hits 160 MHz — fast enough for low-speed switching and level translation up to a few MHz.

Bias resistor ratio and saturation voltage — sizing the base drive

With R1 at 4.7 kΩ and R2 at 47 kΩ, the transistor turns on when the input pulls below roughly 0.7 V relative to the emitter. The 10:1 divider ratio means the base current is set primarily by R1 and the input voltage swing. Saturation voltage is specified at 300 mV max with 500 µA base drive into 10 mA collector load — a typical margin for driving a relay coil or an LED string from a 5 V or 3.3 V logic output.

Frequently asked questions

What is the closest pin-compatible alternative to the BCR166E6327?

Within the same Infineon pre-biased PNP family, parts with different resistor ratios (e.g., BCR166W with R1=4.7 kΩ, R2=open) share the same SOT-23-3 footprint. The deciding factor is the R1/R2 divider — the BCR166E6327's 4.7 kΩ / 47 kΩ combination sets a specific on/off threshold that may differ from other family members.

Is the BCR166E6327 RoHS compliant?

The part is listed as RoHS compliant per Infineon's standard lead-free plating. No separate RoHS exemption certificate is required for this order code.