Diodes Incorporated DL4936-13-F

Overview

DL4936-13-F from Diodes Incorporated is a surface-mount fast recovery rectifier diode with 400 V peak repetitive reverse voltage (VRRM), 1.0 A average forward rectified current (IO) at TT = 75°C, and 1.2 V maximum instantaneous forward voltage at IF = 1.0 A. It features glass passivation, low leakage (<5.0 µA), and 200 ns reverse recovery time (trr), used in AC/DC input stage rectification for industrial power supplies and LED drivers.

For engineers reviewing the DL4936-13-F datasheet, DL4936-13-F pinout, DL4936-13-F application, or DL4936-13-F equivalent, key selection criteria include VRRM derating for capacitive loads (−20% IO), thermal derating per Fig. 2, MELF package solderability per MIL-STD-202 Method 208, and RoHS-compliant matte tin plating.

Technical Context

This device operates as a single-phase, half-wave rectifier for 60 Hz resistive or inductive loads. Its fast recovery (trr = 200 ns) enables efficient switching in offline SMPS front-end stages, while low forward voltage (VFM = 1.2 V @ 1.0 A) reduces conduction loss.

The MELF package provides high thermal dissipation in compact form, with operating junction temperature range of −65°C to +150°C and total capacitance of 15 pF at 1 MHz / 4 V reverse bias - critical for EMI-sensitive rectifier placement near EMI filters.

Key Specifications

Pinout & Package

MELF (Metal Electrode Leadless Face) cylindrical surface-mount package with axial cathode band marking; no leads, soldered directly via end caps; UL 94V-0 rated molded plastic body; weight 0.25 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06S and MUR105, DL4936-13-F offers optimal balance of 400 V rating, MELF thermal performance, and RoHS-compliant surface-mount compatibility for mid-power industrial and consumer AC/DC stages - without requiring footprint redesign or sacrificing reliability.

Availability

DL4936-13-F is available at Aetrix Electronics and suitable for industrial AC/DC adapters, LED driver input rectification, and consumer power adapters requiring stable component supply and long-term manufacturing continuity.

Supply support for DL4936-13-F 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 and manufacturing operations across Asia and the US.

The DL493x series belongs to Diodes' surface-mount fast recovery rectifier product line, engineered specifically for high-efficiency, space-constrained AC/DC front-end rectification in industrial, computing, and lighting applications.

FAQ

What is the maximum allowable junction temperature for DL4936-13-F?

The absolute maximum junction temperature (Tj) is +150°C, with storage temperature matching this range (−65°C to +150°C). Derating begins at terminal temperature (TT) above 75°C per Fig. 2 - at TT = 100°C, IO drops to ~0.65 A. Thermal design must ensure case-to-ambient resistance maintains Tj ≤ 150°C under worst-case ambient and power dissipation.

Can DL4936-13-F be used in full-wave bridge configurations?

No - DL4936-13-F is a single-diode device in MELF package with two terminals (anode/cathode); it cannot replace a full-wave bridge. For bridge applications, Diodes Incorporated offers integrated solutions like DB107S (400 V, 1 A) or discrete quad packages. Using four DL4936-13-F units is not recommended due to mismatched trr and thermal coupling limitations.

Is the "-F" suffix mandatory for RoHS compliance?

Yes - the "-F" suffix explicitly denotes the RoHS-compliant version with matte tin plating and exemptions applied per EU Directive Annex Notes 5 and 7. The base part number DL4936-13 is not RoHS-compliant. Datasheet Note 4 confirms that "-F" must be added to order the lead-free variant.

How does capacitive loading affect DL4936-13-F current rating?

For capacitive input filters, the average forward current (IO) must be derated by 20% - i.e., from 1.0 A to 0.8 A - due to higher peak currents and increased thermal stress during capacitor charging. This derating is specified in the datasheet's "Single phase, half wave, 60Hz… For capacitive load, derate current by 20%" note and applies regardless of operating temperature.