Diodes Incorporated TT8T08-13

Overview

TT8T08-13 from Diodes Incorporated is an 8A standard recovery bridge rectifier in TTL package, rated for 800V peak repetitive reverse voltage (VRRM), 8A average forward current (IF(AV)), and 1.1V max forward voltage at 4A. It features glass-passivated die construction, UL recognition (E364304), and RoHS-compliant matte tin-plated leads - used in AC/DC front-end rectification for industrial power supplies and motor drive input stages.

For engineers reviewing the TT8T08-13 datasheet, TT8T08-13 pinout, TT8T08-13 application, or TT8T08-13 equivalent, key selection criteria include VRRM margin for line surge tolerance, thermal resistance (RθJA = 69°C/W without heatsink), IFSM rating (270A @ 125°C, 1.0ms), trr of 500ns for moderate switching speed, and TTL package compatibility with high-density PCB layouts.

Technical Context

This device implements a single-phase full-wave bridge configuration using four silicon diodes in a monolithic molded plastic package. Its standard recovery characteristic (trr = 500ns) balances low conduction loss and manageable switching noise for line-frequency (50/60Hz) and low-kHz auxiliary supply applications.

Thermal design relies on its low RθJC (3°C/W) and RθJL (4°C/W), enabling direct PCB copper pour heatsinking without external sinks in ≤5W dissipation scenarios. The 0.41g mass and TTL footprint support automated assembly and vibration-resistant mounting in industrial enclosures.

Key Specifications

Pinout & Package

Package: TTL (standard bridge rectifier outline per Diodes Inc. package drawings; 10.20mm × 9.90mm × 1.55mm body height; 0.41g weight; matte tin-plated leads).

Key Features

Applications

Availability

TT8T08-13 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive input stages, LED driver front ends, and appliance control boards requiring stable component supply with full traceability and long-lifecycle support.

Supply support for TT8T08-13 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.

The TT8T series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-sensitive, high-reliability AC/DC conversion in industrial, appliance, and lighting applications where moderate switching speed and high surge capability are prioritized over ultra-fast recovery.

FAQ

What is the maximum operating junction temperature for TT8T08-13?

The absolute maximum junction temperature (TJ) is +150°C, with continuous operation permitted from –55°C to +150°C. Derating begins above 25°C ambient per Figure 2 in DS45301 Rev. 7–2; at 70°C ambient, IF(AV) reduces to approximately 5.2A with no heatsink.

Is TT8T08-13 pin-compatible with TT8T06-13?

Yes - both share identical TTL package dimensions, pinout (AC1, AC2, +, –), and mechanical footprint. The only functional difference is VRRM: TT8T06-13 is rated at 600V, while TT8T08-13 is rated at 800V; substitution requires verifying line-voltage surge margins in the target design.

Does TT8T08-13 require a heatsink for 8A operation?

No external heatsink is required if PCB layout provides ≥400 mm² of 2-ounce copper connected to the terminals. Thermal resistance rises to 69°C/W without copper pour; with optimized layout (RθJA ≈ 10°C/W), 8A operation remains within TJ limits at ≤50°C ambient.

What is the reverse recovery time (trr) test condition for TT8T08-13?

trr is measured under IF = 0.5A, IRR = 0.25A, and IR = 1A, per JEDEC standards. The specified maximum is 500ns at TA = +25°C. This value increases with junction temperature and decreases slightly with higher di/dt, as shown in typical curves in DS45301.