NXP Semiconductors BTA202X-800D,127

Overview

BTA202X-800D from NXP Semiconductors is a planar passivated three-quadrant (3Q) high-commutation triac in TO-220F (SOT186A) package, rated for 800 V repetitive peak off-state voltage, 2 A RMS on-state current, and 14 A non-repetitive peak on-state current. Its very sensitive gate (0.25–5 mA IGT) enables direct logic-level triggering from microcontrollers in AC load switching applications such as motor controls and appliance power stages.

For engineers reviewing the BTA202X-800D datasheet, BTA202X-800D pinout, BTA202X-800D application, or BTA202X-800D equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in NXP's 2014 product data sheet.

Technical Context

The BTA202X-800D implements 3Q triggering only (T2+/G+, T2+/G−, T2−/G−), eliminating quadrant I operation to improve noise immunity and reduce false turn-on. Its planar passivation ensures voltage ruggedness up to 800 V VDRM and dV/dt immunity of 350 V/µs at 125 °C.

Thermal design is supported by an isolated mounting base (2500 V RMS isolation), 5.5 K/W junction-to-heatsink thermal resistance, and snubberless commutation capability (dIcom/dt ≥ 1.2 A/ms at 125 °C). Gate sensitivity remains stable across −50 °C to 150 °C junction temperature.

Key Specifications

Pinout & Package

Package: TO-220F (SOT186A), plastic single-ended "full pack" with isolated mounting base, 1 mounting hole, and 3 leads. Mounting base is electrically isolated (n.c.) and rated for 2500 V RMS isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT138-800D and MAC97A8, the BTA202X-800D uniquely balances microcontroller compatibility (sub-5 mA IGT), 800 V mains robustness, and 2500 V isolated mounting - making it optimal for safety-compliant, low-power AC control in white goods and industrial panels.

Availability

BTA202X-800D is available at Aetrix Electronics and suitable for washing machine motor controls, smart thermostat actuator drives, and white goods door lock interfaces requiring stable component supply and long-term industrial availability.

Supply support for BTA202X-800D 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 consumer markets.

The BTA202X-800D belongs to NXP's high-commutation 3Q triac family, engineered specifically for reliable, low-power AC load switching in safety-critical home appliances and industrial controls where gate sensitivity and isolation integrity are mandatory.

FAQ

What is the maximum junction temperature specification for the BTA202X-800D?

The BTA202X-800D has a maximum junction temperature (Tj) rating of 125 °C, as defined in Table 4 (Limiting values) of the NXP datasheet. This value governs thermal design limits - for example, at 2 A RMS load, heatsink temperature must remain ≤110 °C to maintain safe operation. Exceeding 125 °C risks permanent degradation of the planar passivated structure. The BTA202X-800D datasheet specifies derating curves in Figures 1–3 to ensure compliance.

Does the BTA202X-800D support full four-quadrant triggering?

No, the BTA202X-800D is explicitly a three-quadrant (3Q) triac and triggers only in quadrants II (T2+/G−), III (T2−/G−), and IV (T2+/G+), as confirmed in Section 1 (General description) and Section 2 (Features and benefits). Quadrant I (T2−/G+) triggering is disabled to improve noise immunity - a deliberate design choice that reduces false turn-on from EMI or dV/dt transients. This behavior is intrinsic to the BTA202X-800D device architecture.

What is the isolation voltage rating between terminals and the mounting base for the BTA202X-800D?

The BTA202X-800D provides 2500 V RMS isolation voltage (Visol(RMS)) from all main terminals (T1, T2, G) to the isolated mounting base, per Table 6 (Isolation characteristics) in the datasheet. This rating applies under sinusoidal 50–60 Hz conditions, clean/dust-free environment, and 25 °C heatsink temperature. It enables safe mechanical mounting to grounded metal chassis without additional insulation, a key requirement for UL/IEC-certified white goods using the BTA202X-800D.

Can the BTA202X-800D be driven directly by a 3.3 V microcontroller GPIO pin?

Yes - the BTA202X-800D features a very sensitive gate with IGT ranging from 0.25 mA to 5 mA at 25 °C (Table 7), allowing direct drive from standard 3.3 V or 5 V microcontroller GPIOs without external buffers. Its 3Q architecture further reduces required gate charge versus 4Q triacs. However, gate resistor selection (typically 100–330 Ω) must limit peak gate current to ≤2 A (IGM limit) and ensure sufficient pulse energy for reliable turn-on across temperature, as detailed in the BTA202X-800D application guidance.

What is the thermal resistance from junction to heatsink (Rth(j-h)) for the BTA202X-800D?

The BTA202X-800D has a maximum thermal resistance of 5.5 K/W from junction to heatsink (Rth(j-h)), specified in Table 5 (Thermal characteristics) with heatsink compound applied. This value assumes full-cycle conduction and is critical for calculating heatsink size: for example, at 2 A RMS and 1.63 V typical VT, power dissipation is ~3.3 W, requiring a heatsink no warmer than 110 °C ambient to keep junction temperature ≤125 °C. The BTA202X-800D datasheet provides transient impedance curves (Fig. 6) for pulsed-load analysis.