Diodes Incorporated HER602-T

Overview

HER602-T from Diodes Incorporated is a 6.0A, 100V high-efficiency axial-lead rectifier diode optimized for AC/DC power supplies and input-stage rectification in industrial and consumer power adapters. It delivers 1.2V max forward voltage at 6.0A DC, 250A surge capability (8.3ms), and 60ns reverse recovery time, enabling compact, thermally robust designs in offline SMPS front-ends.

For engineers reviewing the HER602-T datasheet, HER602-T pinout, HER602-T application, or HER602-T equivalent, key selection criteria include its 100V VRRM rating, low 10µA reverse leakage at 25°C, UL 94V-0 flammability compliance, axial lead mechanical configuration, and derating behavior per Fig. 1 under ambient temperature and PCB copper area constraints.

Technical Context

This high-efficiency rectifier operates as a single-phase, half-wave silicon PN junction device rated for 60Hz resistive or inductive loads. Its 60ns reverse recovery time (measured at IF = 0.5A, IR = 1.0A, IRR = 0.25A) supports moderate-frequency switching in flyback and forward converters up to ~100kHz.

The R-6 package features solderable axial leads per MIL-STD-202 Method 208, with cathode polarity indicated by a color band. Thermal performance depends on mounting: standard derating (Curve B) assumes no ground plane, while enhanced derating (Curve A) applies with 25mm² copper area - critical for sustaining 6.0A average current at elevated ambient temperatures.

Key Specifications

Pinout & Package

R-6 molded plastic package with axial leads; cathode identified by color band; approx. weight 1.7 g; UL 94V-0 compliant material; mounting position unrestricted.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-efficiency rectifier applications.

Compared with STTH6L06D and GBU6K, HER602-T offers optimal balance of low VF, axial-lead simplicity, and 100V-class rating for cost-sensitive, through-hole AC/DC front-ends where thermal mass and board-level surge immunity are prioritized over ultra-fast recovery or integration.

Availability

HER602-T is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial SMPS input stages, and LED driver front-ends requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.

Supply support for HER602-T 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity.

The HER60x series belongs to Diodes' high-efficiency rectifier product line, engineered specifically for high-current, low-loss AC/DC conversion in cost-sensitive power supplies where reliability and thermal robustness are essential.

FAQ

What is the maximum allowable case temperature for continuous 6.0A operation?

The HER602-T sustains 6.0A average forward current only up to TC = 55°C, as specified in the "Full Load Reverse Current" test condition. Above this, derating is mandatory: per Fig. 1, current must be reduced linearly to zero at TC = 150°C. PCB copper area (25mm² ground plane) enables Curve A derating, extending usable current at elevated ambient temperatures.

Can HER602-T replace HER601 in a 50V-rated design?

Yes - HER602-T has identical package, pinout, and thermal characteristics as HER601, with higher VRRM (100V vs. 50V) and identical VF, TRR, and IFSM. Substitution improves voltage margin without layout or thermal redesign, provided the circuit does not rely on HER601's lower leakage (HER601 IR = 5µA vs. HER602-T's 10µA at 25°C).

Is HER602-T suitable for high-frequency PFC circuits?

No - its 60ns TRR and non-Schottky construction limit effective use to ≤100kHz switching frequencies. For active PFC stages operating at 65–300kHz, fast recovery diodes like FFPF10U60DT or SiC Schottkys (e.g., C3D06060A) provide lower Qrr and near-zero reverse recovery loss.

Does HER602-T meet RoHS and REACH requirements?

Yes - HER602-T is RoHS-compliant (Pb-free, halogen-free) and REACH-conformant per Diodes Incorporated's official product change notices and material declarations. The R-6 package uses lead-free solderable terminations and UL 94V-0 compliant molding compound meeting all applicable environmental directives.