NXP Semiconductors BTA2008-800E,412

Overview

BTA2008-800E from NXP Semiconductors is a planar passivated 3-quadrant high-commutation triac in TO-92 (SOT54) package, rated for 800 V repetitive peak off-state voltage, 0.8 A RMS on-state current, and 9 A non-repetitive peak on-state current. It serves as a logic-compatible AC power switch for low-power inductive loads such as solenoids and small motors, directly driven by microcontrollers or low-power drivers.

For engineers reviewing the BTA2008-800E datasheet, BTA2008-800E pinout, BTA2008-800E application, or BTA2008-800E equivalent, key selection criteria include gate trigger current (0.5–10 mA across three quadrants), commutation robustness (dIcom/dt = 1.6 A/ms at 125 °C), and thermal resistance (60 K/W junction-to-lead), critical for thermally constrained through-hole designs.

Technical Context

The BTA2008-800E implements 3Q (three-quadrant) triggering-excluding Q4-to improve noise immunity and eliminate false turn-on from negative gate pulses during high-dV/dt transients. Its sensitive gate enables direct interface with 3.3 V/5 V logic without external amplification.

It features planar passivation for voltage ruggedness up to 800 V VDRM and supports commutation of inductive loads with dIcom/dt capability of 1.6 A/ms at Tj = 125 °C. Thermal design relies on junction-to-lead conduction (Rth(j-lead) = 60 K/W), not ambient dissipation, due to its TO-92 lead-frame construction.

Key Specifications

Pinout & Package

Package: TO-92 (SOT54), plastic single-ended leaded through-hole package with 3 leads; body dimensions per IEC/JEDEC SC-43A outline (D = 4.8 mm, L = 14.5 mm, e = 2.54 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac switching applications.

Compared with BT134-800E and MAC97A8, the BTA2008-800E uniquely balances 800 V blocking, 3Q noise immunity, and sub-10 mA gate sensitivity in TO-92-making it optimal for microcontroller-driven 230 VAC inductive loads where layout space and EMI resilience are constrained.

Availability

BTA2008-800E is available at Aetrix Electronics and suitable for low-power motor controls, solenoid actuation, white goods auxiliary functions, and industrial panel indicator circuits requiring stable component supply across production lifecycles.

Supply support for BTA2008-800E 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The BTA2008-800E belongs to NXP's "Hi-Com Triac" product line, engineered specifically for reliable, logic-compatible AC switching in space- and power-constrained embedded systems interfacing with inductive and resistive loads.

FAQ

What is the maximum junction temperature rating for the BTA2008-800E?

The BTA2008-800E has a maximum junction temperature (Tj) rating of 125 °C, as specified in the Absolute Maximum Ratings table. This limit must not be exceeded during operation; thermal design must ensure that power dissipation-calculated from VT × IT and duty cycle-keeps Tj ≤ 125 °C, especially under worst-case ambient and lead temperature conditions. Derating is required above 70 °C lead temperature per Figure 2 in the datasheet.

Does the BTA2008-800E support all four quadrants of triac triggering?

No, the BTA2008-800E is a 3-quadrant (3Q) triac and supports triggering only in quadrants Q1 (T2+/G+), Q2 (T2+/G−), and Q3 (T2−/G−). It explicitly excludes Q4 (T2−/G+) triggering. This design improves noise immunity by eliminating susceptibility to false turn-on from negative gate transients during high dV/dt events, a key feature confirmed in Section 1.2 and Figure 7 of the datasheet.

Can the BTA2008-800E be used directly with a 3.3 V microcontroller GPIO pin?

Yes, the BTA2008-800E can be driven directly by a 3.3 V microcontroller GPIO pin because its gate trigger current (IGT) is specified from 0.5 mA to 10 mA across all three supported quadrants at 25 °C. With typical VGT of 0.3 V, even a weak 3.3 V output driving a 330 Ω series resistor delivers ~9 mA-well within the guaranteed activation range. No external transistor buffer is required.

What is the significance of the "E" suffix in BTA2008-800E?

The "E" suffix in BTA2008-800E denotes NXP's "Series E" triac family, characterized by optimized balance between commutation performance (dIcom/dt = 1.6 A/ms) and gate sensitivity (low IGT). This distinguishes it from earlier series (e.g., "B" or "D") which prioritize either higher commutation or higher gate robustness-but not both. The "E" variant is specifically intended for low-power driver and microcontroller interface applications.

Is a snubber circuit required when using the BTA2008-800E with inductive loads?

A snubber circuit is not strictly required for most inductive loads due to the BTA2008-800E's high commutation capability (dIcom/dt = 1.6 A/ms at 125 °C) and 3Q architecture, which inherently improves turn-off reliability. However, for highly reactive loads (e.g., large solenoids with >100 mH inductance) or systems subject to frequent rapid cycling, a small RC snubber (e.g., 100 Ω + 100 nF) across MT1–MT2 is recommended to suppress voltage overshoot and extend device lifetime.