Infineon Technologies SMBTA06E6433HTMA1

Overview

SMBTA06E6433HTMA1 from Infineon Technologies is an NPN silicon general-purpose bipolar junction transistor (BJT) designed for audio frequency amplification and switching applications. It features V_CEO = 80 V, I_C = 500 mA, h_FE ≥ 100 at I_C = 10 mA, V_CE(sat) ≤ 0.25 V at I_C = 100 mA / I_B = 10 mA, and operates up to T_j = 150 °C. It is used in automotive signal conditioning circuits requiring AEC-Q101 qualification.

For engineers reviewing the SMBTA06E6433HTMA1 datasheet, SMBTA06E6433HTMA1 pinout, SMBTA06E6433HTMA1 application, or SMBTA06E6433HTMA1 equivalent, key selection criteria include its low V_CE(sat), high f_T = 100 MHz, SOT23 package thermal resistance (R_thJS ≤ 215 K/W), complementary PNP pairing with SMBTA56, and RoHS-compliant lead-free construction.

Technical Context

This NPN BJT delivers linear amplification and saturated switching in low-to-medium power analog and digital signal paths. Its DC current gain (h_FE) maintains ≥100 across I_C = 1–100 mA at V_CE = 1 V, and its transition frequency (f_T) reaches 100 MHz under 20 mA collector bias, supporting AF and low-speed digital edge control.

The device exhibits low saturation voltage (V_CE(sat) ≤ 0.25 V) and low base-emitter on-voltage (V_BE(ON) ≤ 1.2 V) at rated switching currents, enabling efficient drive in discrete amplifier stages and logic-level interface buffers. Its thermal design supports operation up to 150 °C junction temperature with R_thJS ≤ 215 K/W.

Key Specifications

Pinout & Package

SMBTA06E6433HTMA1 is housed in a surface-mount SOT23 package (JEDEC TO-236AB), with standardized 1.3 mm × 2.9 mm footprint, 0.95 mm height, and gull-wing leads. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with MMBTA06-7-F, SMBTA06E6433HTMA1 offers identical performance but with AEC-Q101 validation and specific reel size (180 mm). Versus BC846B,215, it trades higher gain for automotive qualification and higher breakdown voltage-critical for 12 V system robustness.

Availability

SMBTA06E6433HTMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable audio preamplifiers requiring stable component supply, AEC-Q101 compliance, and SOT23 thermal performance.

Supply support for SMBTA06E6433HTMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and discrete devices, with global manufacturing and quality certification infrastructure.

SMBTA06E6433HTMA1 belongs to Infineon's SMBTA/MMBTA family of AEC-Q101-qualified general-purpose transistors, engineered specifically for automotive signal conditioning and industrial switching where reliability under thermal stress is mandatory.

FAQ

Is SMBTA06E6433HTMA1 pin-compatible with BC846B?

Yes, SMBTA06E6433HTMA1 uses the standard SOT23 pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), matching BC846B and most SOT23 NPN transistors. However, it is not a drop-in replacement due to differences in V_CEO (80 V vs. 65 V), AEC-Q101 qualification, and h_FE range (100 min vs. 200–450).

What is the maximum continuous power dissipation at 79 °C ambient?

At T_S ≤ 79 °C, the maximum continuous power dissipation is 330 mW. This value is derated linearly above 79 °C, reaching zero at 150 °C junction temperature. The thermal resistance R_thJS ≤ 215 K/W defines the junction-to-solder-point path, not ambient-to-junction.

Does SMBTA06E6433HTMA1 support pulsed operation beyond its DC ratings?

Yes-pulse testing confirms I_CM = 1 A for t_p ≤ 10 ms with duty cycle D ≤ 2%. Permissible pulse load curves show P_tot(max)/P_tot(DC) peaks at ~5× for t_p = 100 µs, enabling short-duration surge handling in relay drivers or protection circuits.

How does the SMBTA06E6433HTMA1 differ from the MMBTA06 variant?

SMBTA06E6433HTMA1 and MMBTA06 share identical die, electrical characteristics, and AEC-Q101 qualification. The distinction lies in packaging: "SMBTA" denotes Infineon's internal part numbering with 180 mm reels (3,000 pcs), while "MMBTA" aligns with industry-standard ordering codes used by distributors like Diodes Inc. and ON Semiconductor.