Diodes Incorporated TT8JL

Overview

TT8JL from Diodes Incorporated is an 8A, 600V glass-passivated bridge rectifier in TTL package, featuring low forward voltage (0.9 V max @ 4 A), ultra-low leakage current (5 µA max @ 600 V), and robust surge capability (165 A IFSM @ 8.3 ms). It serves as a primary AC-to-DC conversion stage in offline power supplies for industrial motor drives and LED lighting systems.

For engineers reviewing the TT8JL datasheet, TT8JL pinout, TT8JL application, or TT8JL equivalent, key selection criteria include peak repetitive reverse voltage rating, thermal resistance with/without heatsink, junction capacitance (85 pF), derating behavior across ambient temperature, and RoHS-compliant "Green" construction per UL 94V-0.

Technical Context

The TT8JL integrates four silicon diodes in a single-phase full-wave bridge configuration with glass-passivated junctions, enabling stable operation up to 150°C junction temperature. Its TTL package uses matte tin-plated leads and green molding compound meeting halogen-free (<900 ppm Br/Cl, <1000 ppm Sb) and RoHS 3 requirements.

Thermal performance is characterized by three R_θ values: 5°C/W (junction-to-case), 7°C/W (junction-to-lead), and 9°C/W (junction-to-ambient) when mounted on a standardized 15 mm × 12 mm × 1.6 mm aluminum pad over a 160 mm × 160 mm × 5 mm copper plate - confirming suitability for conduction-cooled industrial designs without forced airflow.

Key Specifications

Pinout & Package

Package: TTL (single-phase bridge rectifier outline per Diodes Inc. package drawings; 10.20 mm × 9.90 mm × 1.65 mm body, 4.90 mm lead pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and MB10F, TT8JL uniquely balances compact TTL packaging, 600 V ruggedness, sub-0.9 V forward drop, and industry-leading thermal resistance - making it optimal for mid-power industrial and lighting applications demanding density, efficiency, and regulatory compliance.

Availability

TT8JL is available at Aetrix Electronics and suitable for industrial motor drives, LED street lighting power supplies, factory automation PLC power modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for TT8JL 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 the Americas.

TT8JL belongs to Diodes' high-voltage bridge rectifier product line, engineered specifically for energy-efficient, thermally constrained AC-DC conversion in industrial, lighting, and medical power systems where reliability and regulatory compliance are non-negotiable.

FAQ

What is the maximum junction temperature and how does it affect derating?

The TT8JL has a maximum junction temperature (T_J) of +150°C. Its forward current must be derated linearly above +25°C ambient: Figure 1 shows 8 A is sustainable up to +75°C case temperature with heatsink, dropping to ~4.5 A at +125°C case. Without heatsink, full rating applies only below +45°C ambient (Figure 2).

Is TT8JL suitable for automotive applications?

TT8JL is not AEC-Q200 qualified and lacks PPAP documentation or IATF 16949-specific change control. While its -55°C to +150°C operating range meets automotive temperature extremes, Diodes explicitly states that automotive use requires direct engagement with their applications team for qualified alternatives.

How does the TTL package compare thermally to standard GBU or KBU packages?

The TTL package achieves R_θJA = 9°C/W with heatsink - significantly better than typical GBU packages (~15–18°C/W). This results from optimized copper leadframe geometry and direct thermal path to PCB pads, enabling higher power density in space-limited designs without external heatsinks.

What is the significance of the "Green" designation beyond RoHS compliance?

"Green" denotes Diodes' halogen- and antimony-free specification: <900 ppm bromine, <900 ppm chlorine (≤1500 ppm total Br+Cl), and <1000 ppm antimony. This exceeds RoHS and supports safer end-of-life recycling and reduced corrosive gas emission during board rework or fire scenarios.