Infineon Technologies SMBTA92E6327HTSA1

Overview

SMBTA92E6327HTSA1 from Infineon Technologies is a PNP silicon high-voltage bipolar junction transistor (BJT) designed for high-breakdown voltage switching applications. It features V_CEO = 300 V, I_C = 500 mA, V_CE(sat) = 0.5 V at I_C = 20 mA / I_B = 2 mA, h_FE ≥ 25 at I_C = 1 mA, and SOT23 package. It is used in video output stages of CRT TVs and offline switching power supply snubber or auxiliary switch circuits.

For engineers reviewing the SMBTA92E6327HTSA1 datasheet, SMBTA92E6327HTSA1 pinout, SMBTA92E6327HTSA1 application, or SMBTA92E6327HTSA1 equivalent, key selection criteria include high-voltage blocking capability (300 V), low saturation voltage under moderate drive, thermal resistance (R_thJS ≤ 210 K/W), RoHS-compliant SOT23 packaging, and AEC-Q101 qualification for automotive-adjacent reliability.

Technical Context

This PNP BJT operates in common-emitter configuration with fixed DC biasing requirements. Its high V_CEO and V_CBO ratings (both 300 V) enable use in flyback snubbers and horizontal deflection circuits where rapid voltage transients occur. The device exhibits h_FE = 25–100 across I_C = 1–30 mA, supporting stable current amplification in linear and saturated switching modes.

Thermal performance is defined by R_thJS ≤ 210 K/W and P_tot = 360 mW at T_S ≤ 74 °C. Its f_T = 50 MHz and C_cb = 6 pF at V_CB = 20 V indicate suitability for medium-frequency switching (≤100 kHz), not RF or high-speed digital applications.

Key Specifications

Pinout & Package

SMBTA92E6327HTSA1 is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint), with lead finish compliant to RoHS and JEDEC J-STD-020 moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching transistor applications.

Compared with MMBTA92-7-F, SMBTA92E6327HTSA1 offers identical silicon performance with Infineon-specific traceability and AEC-Q101 documentation; versus ZTX951, it trades lower current headroom for smaller SOT23 footprint and tighter thermal resistance in space-constrained layouts.

Availability

SMBTA92E6327HTSA1 is available at Aetrix Electronics and suitable for video output stages, switching power supply snubbers, automotive display backlight drivers, and industrial AC-DC auxiliary supplies requiring stable component supply across extended production lifecycles.

Supply support for SMBTA92E6327HTSA1 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 electronics, and industrial control ICs and discrete devices.

SMBTA92E6327HTSA1 belongs to Infineon's high-voltage bipolar transistor product line, engineered for reliability in CRT deflection, flyback snubbing, and industrial power conversion where voltage ruggedness and thermal stability are critical.

FAQ

Is SMBTA92E6327HTSA1 pin-compatible with MMBTA92?

Yes - both share identical SOT23 pinout (1=E, 2=B, 3=C), same electrical specifications (V_CEO, I_C, h_FE, V_CE(sat)), and thermal characteristics. Differences are limited to branding, packaging reel size (180 mm vs. 7"), and manufacturer-specific traceability data; no PCB redesign is required for substitution.

What is the maximum safe operating frequency for SMBTA92E6327HTSA1?

The device has f_T = 50 MHz, but its practical switching limit is ~100 kHz due to stored charge and minority carrier lifetime. At 15.625 kHz (CRT horizontal rate), it achieves full saturation and fast turn-off; above 200 kHz, switching losses increase significantly and V_CE(sat) degrades.

Does SMBTA92E6327HTSA1 require a heatsink in typical applications?

No - with P_tot = 360 mW at T_S ≤ 74 °C and R_thJS ≤ 210 K/W, it operates within safe junction temperature (T_j ≤ 150 °C) using standard 1 oz copper pad (≥10 mm²) on FR-4 PCB. Heatsinking is unnecessary unless ambient exceeds 74 °C or duty cycle exceeds 50% at full I_C.

Can SMBTA92E6327HTSA1 replace SMBTA42 in complementary circuits?

No - SMBTA42 is the NPN complement; direct replacement would invert logic and cause circuit failure. However, SMBTA92E6327HTSA1 and SMBTA42 are designed as matched pairs: same V_CEO, I_C, and thermal specs, enabling balanced push-pull or totem-pole driver designs when used together.