Diodes Incorporated TT6M

Overview

TT6M from Diodes Incorporated is a 1000 V, 6 A standard recovery bridge rectifier in TTL package, featuring 1.0 V max forward voltage at 3 A and 5 µA max reverse leakage at 1000 V. It employs glass-passivated die construction for robustness and is UL-recognized (E364304), RoHS-compliant, and halogen/antimony-free - used in AC/DC front-end power supplies for industrial motor drives.

For engineers reviewing the TT6M datasheet, TT6M pinout, TT6M application, or TT6M equivalent, key selection criteria include peak repetitive reverse voltage (1000 V), average forward current derating with/without heatsink, thermal resistance (R_θJA = 45 °C/W unmounted), junction capacitance (46 pF), and surge rating (150 A @ 8.3 ms).

Technical Context

The TT6M integrates four standard recovery diodes in a single-phase full-wave bridge configuration, optimized for line-frequency rectification (50/60 Hz). Its glass-passivated junction ensures stable reverse characteristics across -55°C to +150°C operating range and low IR drift up to 125°C.

Thermal performance is defined by three R_θ values: 8 °C/W (junction-to-case), 9 °C/W (junction-to-lead), and 45 °C/W (junction-to-ambient, unmounted). With heatsink (15 mm × 12 mm × 1.6 mm Al pad on 100 mm × 75 mm × 27 mm fin), R_θJA drops to 12 °C/W, enabling sustained 6 A operation at elevated ambient temperatures.

Key Specifications

Pinout & Package

Package: TTL (single-in-line, 4-terminal molded plastic package with staggered leads; body dimensions 10.20 × 9.90 × 1.55 mm, lead pitch 5.00 mm). Terminals are matte tin-plated, solderable per MIL-STD-202 Method 208. Polarity marked on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Compared with GBU6K and W06M, TT6M offers the lowest thermal resistance in its class (R_θJA = 45 °C/W unmounted), UL recognition for accelerated safety certification, and tighter IR specification - making it optimal for space-constrained, certified industrial power supplies demanding long-term reliability.

Availability

TT6M is available at Aetrix Electronics and suitable for industrial motor drive power supplies, LED streetlight AC/DC converters, and universal-input offline SMPS requiring stable component supply, consistent parametric performance, and long-lifecycle availability.

Supply support for TT6M 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The TTL-packaged bridge rectifier product line targets cost-sensitive, high-volume AC/DC front-end applications where reliability, regulatory compliance (UL, RoHS, "Green"), and thermal efficiency in compact footprints are critical design requirements.

FAQ

What is the maximum junction temperature and how does it affect continuous current rating?

The TT6M has an operating junction temperature range of -55°C to +150°C. At 150°C, its average forward current derates to approximately 2.2 A with no heatsink (per Figure 1), and to ~4.8 A with the specified aluminum heatsink. Exceeding T_J = 150°C risks permanent parametric shift or thermal runaway due to increased leakage current.

Is the TT6M suitable for high-frequency switching applications like PFC or flyback converters?

No - the TT6M is a standard recovery bridge rectifier with typical reverse recovery time (t_rr) not specified in the datasheet and unsuitable for frequencies above 1 kHz. It is designed exclusively for 50/60 Hz line-frequency rectification. For high-frequency applications, fast or ultrafast recovery bridges (e.g., GBPC series) must be used instead.

How does the TTL package compare to GBU or KBU packages in terms of thermal performance?

The TTL package has a lower R_θJA (45 °C/W unmounted) than standard GBU (50 °C/W) and KBU (55 °C/W) packages due to its optimized leadframe geometry and thinner mold compound. When mounted on a 15 mm × 12 mm copper pad, TTL achieves R_θJA = 12 °C/W - outperforming GBU/KBU equivalents by 3–5 °C/W under identical heatsinking conditions.

Does TT6M meet AEC-Q200 for automotive use?

No - the TT6M is not AEC-Q200 qualified. The datasheet explicitly states that automotive-grade parts require specific change control, PPAP capability, and IATF 16949 manufacturing; users needing automotive qualification must contact Diodes directly for AEC-Q200-compliant alternatives such as the ABS6M-A or GBU6J variants.