NXP Semiconductors BTA208-600E,127

Overview

BTA208-600E from NXP Semiconductors is a planar passivated 3-quadrant high-commutation triac in TO-220AB (SOT78) package, rated for 600 V repetitive peak off-state voltage, 8 A RMS on-state current, and 65 A non-repetitive peak on-state current. It features sensitive gate triggering (≤10 mA across all three quadrants), low on-state voltage (1.65 V max at 10 A), and is designed for direct interfacing with microcontrollers and low-power logic drivers in AC power control circuits.

For engineers reviewing the BTA208-600E datasheet, BTA208-600E pinout, BTA208-600E application, or BTA208-600E equivalent, key selection considerations include its 3Q operation for noise immunity, thermal resistance of 2 K/W (junction-to-mounting-base), gate trigger voltage ≤0.4 V at 25 °C, and suitability for zero-crossing and phase-angle AC control in thermally constrained environments.

Technical Context

The BTA208-600E implements three-quadrant triggering (T2+/G+, T2+/G−, T2−/G−), excluding quadrant I (T2−/G+) to improve noise immunity and prevent false turn-on. Its planar passivation ensures voltage ruggedness up to 600 V VDRM and stable operation at junction temperatures up to 125 °C.

It delivers high commutation capability with dIcom/dt ≥5 A/ms and dVD/dt ≥60 V/µs under specified conditions, enabling reliable turn-off in inductive loads. Gate sensitivity is maintained across temperature via normalized IGT ≤10 mA at 25 °C and ≤25 mA at 125 °C.

Key Specifications

Pinout & Package

Package: TO-220AB (SOT78), plastic single-ended package with heatsink-mounted mounting base (terminal 2), 1 mounting hole, and 3 leads. Dimensions per IEC/JEDEC SC-46: 15.2–16.0 mm length, 9.7–10.3 mm width, 3.5–3.8 mm lead thickness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triac-based AC power control applications.

Compared with BTB20-600SL and MAC228A8, the BTA208-600E provides superior noise immunity via 3Q-only operation, lower gate drive requirements (≤10 mA vs. ≤50 mA), and better thermal performance (2 K/W vs. 3.5 K/W), making it optimal for microcontroller-driven, space-constrained AC control.

Availability

BTA208-600E is available at Aetrix Electronics and suitable for electronic thermostats, general purpose motor controls, lighting dimmers, and industrial solenoid drivers requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for BTA208-600E 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 BTA208-600E belongs to NXP's "Hi-Com Triac" product line, engineered specifically for noise-immune, microcontroller-compatible AC power switching in thermally constrained, cost-sensitive embedded systems.

FAQ

What is the maximum junction temperature specification for the BTA208-600E?

The BTA208-600E has a maximum junction temperature (Tj) rating of 125 °C, as defined in the Absolute Maximum Ratings table. This limit must not be exceeded during operation; thermal design must ensure that power dissipation-calculated from on-state voltage (VT ≤1.65 V) and RMS current (IT(RMS) ≤8 A)-keeps Tj within this bound, typically using the 2 K/W junction-to-mounting-base thermal resistance and appropriate heatsinking.

Does the BTA208-600E support full-quadrant (4Q) triggering?

No, the BTA208-600E is a three-quadrant (3Q) triac and does not support triggering in quadrant I (T2−/G+). Its pinning and internal structure are optimized for triggering only in T2+/G+, T2+/G−, and T2−/G−, which improves noise immunity and eliminates false turn-on caused by EMI coupling into the gate during negative half-cycles. This behavior is explicitly confirmed in both the General Description and Pinning Information sections of the datasheet.

What is the gate trigger voltage (VGT) specification for the BTA208-600E at room temperature?

The BTA208-600E has a gate trigger voltage (VGT) of 0.25 V minimum and 0.4 V maximum at 25 °C, measured under VD = 400 V, IT = 0.1 A, and Tj = 25 °C. This low VGT enables reliable triggering from standard logic-level outputs-even weak 3.3 V GPIOs-without requiring gate resistors larger than 330 Ω to limit current, directly supporting low-power microcontroller interfaces.

Can the BTA208-600E be used in 115 VAC applications?

Yes, the BTA208-600E is fully compatible with 115 VAC systems. Its 600 V VDRM rating provides ample margin over the 162 V peak voltage of 115 VAC mains, ensuring robust blocking capability and long-term reliability. The device's thermal and commutation specifications remain unchanged, allowing full utilization of its 8 A RMS and 65 A surge ratings in lower-voltage applications.

Is the mounting base (T2) of the BTA208-600E electrically isolated from the case?

No, the mounting base of the BTA208-600E is electrically connected to main terminal 2 (T2), as confirmed in the Pinning Information section ("mb: mounting base; main terminal 2"). Therefore, electrical isolation between the heatsink and circuit ground must be implemented externally using insulating washers and shoulder washers if T2 is not referenced to system ground. Failure to isolate may cause short circuits or safety hazards.