Fast Recovery Diode - Unitshine Semiconductor

unitshine-fast-recovery-rectifier

Fast Recovery Diode (FRD) is a semiconductor diode with good switching properties and short reverse recovery time. As a high-frequency rectifing diode, freewheeling diode or damping diode, it is mainly used in switching power supply, PWM pulse width modulator, inverter and other electronic circuits.

Structurally different from ordinary PN junction diode, fast recovery diode belongs to the PIN junction diode. Between the P-type silicon material and N-type silicon material, the base area I is added which constitutes the PIN silicon structure. As the base area is very thin, the reverse recovery charge is very small, the reverse recovery time is shorter, the forward voltage drop is lower and the reverse breakdown voltage is higher.

Features

Our fast recovery diodes possess the following features:

Diffusion junction.
Flat type metal-ceramic packages with pressure contacts.
Double sides cooling.
Short recovery time.
Small recovery charge in reverse.

Application & Specification

Application

Our fast recovery diodes are widely used in the following fields:

Motor Control and driving.
UPS power supply.
Chopper.
Inverter power supply.

Specification

Type	I_F(AV) @T_C		V_RRM	I_RRM	t_rr	Q_rr	V_FM @I_FM		I_FSM	I²t	V_FO	rF	R_thjc	R_thch	T_JM	Fig.
				125°C			25°C			10ms	125°C
	A	℃	V	mA	μS	μC	V	A	KA	kA²s	V	mΩ	℃/W	℃/W	℃
DB123-200	200	85	1200-1800	14	2	50	2.05	800	4	80	0.93	1.3	0.09	0.01	150	D07
DB133-320	320	85	1200-1800	20	3	100	2.15	1500	9	405	0.9	0.645	0.046	0.01	150	D08
DB433-630	630	85	1200-1800	30	3	120	2.1	1500	17	1445	0.78	0.255	0.036	0.009	150	D09
DB143-500	500	85	2000-2500	40	4	850	2.8	1500	8	320	1.5	0.66	0.036	0.008	150	D11
DB153-630	630	85	3800-4500	40	6	2000	2.5	1500	13	845	1.66	0.86	0.022	0.005	150	D13
DB153-1000	1000	85	2000-2500	40	5	1200	2.6	1500	17	1445	1.35	0.54	0.022	0.005	150	D13
DB163-1500	1500	85	2000-2500	60	5	3500	2.8	3000	26	3380	1.1	0.49	0.011	0.003	150	D15
DB163-1000	1000	85	3800-4500	60	6	5300	3.8	3000	19	1805	1.62	0.58	0.011	0.003	150	D15

Installation Precautions

The modules should be installed and commissioned by an operator with relevant electric, electronic and electrical qualification:

Considering the fluctuation of the grid voltage, the current of load is generally several times larger than its rated current at the start while the thyristor chip is less resistant to current shock, it is recommended that you set the appropriate margin when selecting electric current specifications of the modules.
Module chip's working temperature: -40 ℃ ∽ 125 ℃ for SCR; ambient temperature shall not be higher than 40 ℃; environmental humidity shall be less than 86%.
The environment should be no severe vibration and shock where there should be no metal with corrosion and impurities & air that damagesg the insulation.
For thyristor module ise insulated type (meaning insulation resistance between the module terminals and the copper bottom plate is greater than 2.5KV), multiple modules can be mounted on the same heat sink, with earthing wire.
The installation surface of a radiator should be evenly flat, smooth and without scratches, bumps and debris, and surface finish of the radiator should be less than 10μm.
When power modules are mounted on the radiator, a thin layer of thermal grease should be applied between the contact surfaces. Before grease applying, please remove the oxide layer of the radiator contact surface with fine sandpaper, then wipe the surface with absolute ethanol, so that the contact is good enough to reduce the thermal resistance.
When a module is fastened to the surface of the radiator, please use M5 or M6 screws and spring washers then tighten the screws with 4NM torque.
The connection with main electrodes of the modules should be copper busbars with a smooth surface and good contact. After the modules have been in operation for 3 hours, the screws must be tightened again.

Our team is in dedicate and professional position to provide above information for our customers and related operators to properly deal with what we supply to all over the world. You are welcome to contact us to get such information or data, and please address This email address is being protected from spambots. You need JavaScript enabled to view it.