INFINEON BC846U

Mfr. Part

BC846U

Manufacturer

Cypress Semiconductor (Infineon Technologies). Y-IC is a quality distributor for this brand and we are committed to delivering genuine products, reliable supply, and responsive technical and commercial support.

Detailed Description

BC846U is a small-signal NPN silicon transistor for general-purpose switching and amplification.

Classified under Integrated Circuits (ICs) — Specialized ICs in some catalogs, but functionally it is a discrete transistor.

Compact surface-mount package for dense layouts and portable devices.

Typical BC846 family performance includes high voltage handling for its size and fast switching suitable for signal-chain and digital interface tasks.

Key Features

NPN, planar epitaxial silicon construction for stable, predictable behavior.

Wide supply usability with high collector-emitter voltage capability (VCE0 typically 65 V for the BC846 family).

Moderate collector current capability (up to about 100 mA typical for the family).

Low saturation voltage for efficient low-loss switching.

Broad DC current gain options by grade (A/B/C in the BC846 family). The “U” suffix usually denotes a specific package/packing or variant; verify the exact gain group and marking in the datasheet.

Fast transition frequency and switching speed suitable for HF small-signal tasks.

Industry-standard footprint family for easy multi-vendor sourcing.

Key Advantages

Widely second-sourced BC846 family minimizes supply risk.

Small footprint helps reduce board area and BOM cost.

Easy to design-in for low-power analog, digital interface, and general-purpose switching.

In-stock at Y-IC, with an available quantity of 17,390 units for fast fulfillment.

Backed by Y-IC’s quality inspection and ESD-compliant handling.

Packaging

Type: Surface-mount device (SMD).

Package name: SC-74 (per provided data). Vendor case code: 7321. Note that SC-74 is used in the industry for small SOT-23/SOT-23-x family variants; always confirm the exact mechanical drawing in the datasheet.

Material: Molded epoxy body with tin-plated copper leads. Lead-free, RoHS-compliant versions typically available; confirm with the full ordering code/datasheet.

Size: For SC-74/SOT-23 family packages, body length/width is typically in the ~2.8–3.1 mm by ~1.2–1.7 mm range with ~1.0–1.2 mm height; exact dimensions and land pattern must be taken from the BC846U mechanical drawing.

Pin configuration:

- For the common 3-lead BC846 in SOT‑23 style, the typical pin map is 1 = Base, 2 = Emitter, 3 = Collector.

- If your BC846U is a multi-lead SC‑74 variant, reference the specific pin assignment and top marking in the datasheet before layout.

Thermal characteristics (typical for BC846 family in small SMD packages; verify for BC846U):

- Junction temperature range often −55°C to +150°C.

- Junction-to-ambient thermal resistance commonly ~500–625 K/W on a standard JEDEC board; actual value depends strongly on copper area.

- Power dissipation commonly around 200–300 mW at 25°C ambient with standard footprint.

Electrical properties (typical family values; check BC846U datasheet for exact limits):

- VCE0 about 65 V, VCBO about 80 V, VEBO about 6 V.

- IC max about 100 mA.

- DC gain hFE depends on grade (A/B/C) and operating point; typical range roughly 110 to 800.

- VCE(sat) low, often ~0.1–0.25 V at modest currents.

- Transition frequency fT commonly on the order of 100 MHz (device and bias dependent).

Lifecycle

Current status: The BC846 family is a mature, widely produced small-signal transistor series with broad multi-vendor support. No formal end-of-life notice is broadly indicated for the family as of the latest public information. Always verify latest status with Y-IC.

Equivalent and alternative models (verify pinout, gain group, package, and absolute ratings):

- Infineon/Siemens lineage: BC846 series in SOT-23/SC-74 variants.

- Nexperia: BC846A/BC846B/BC846C (SOT-23), also logic-level alternatives in same footprint.

- ON Semiconductor: MMBTBC846 series (SOT-23).

- Diodes Incorporated: BC846B-7-F (SOT-23).

- Vishay: BC846W series (SOT-23).

- Rohm, MCC, Torex, and others offer BC846 family equivalents in SOT-23/SC-74 style packages.

If you need a form-fit-function cross or a pinout-compatible substitute for BC846U specifically, contact Y-IC via our website. Our team will confirm pin mapping, gain grouping, and thermal/electrical match.

Key Application Areas

General-purpose low-power switching and signal amplification.

Biasing and level shifting in analog front-ends and sensor interfaces.

Digital signal conditioning, pull-up/pull-down transistor stages, and gate driving for small loads.

LED driving and small relay/coil driving with proper base limiting.

RF and HF small-signal stages where modest fT suffices.

Portable and battery-powered devices requiring compact, efficient discrete solutions.

Education, prototyping, and maintenance spares thanks to wide availability and simple use.

Datasheet

Y-IC hosts the most authoritative datasheet for BC846U on our product page. For exact electrical limits, mechanical drawings, pin assignments, marking codes, and reliability data, we strongly recommend downloading the datasheet from this page.

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