ROHM Schottky barrier diode RB721Q-40 Data Sheet
Summary
The RB721Q-40 is a highly reliable Schottky barrier diode engineered for efficient low current rectification in diverse electronic applications. This technical manual provides comprehensive data essential for circuit designers, including detailed absolute maximum ratings, electrical characteristics, forward/reverse voltage curves, and thermal performance analysis ($\text{R}_{\text{th}}$). Utilize this guide to ensure proper component integration and optimal circuit design for reliable power conversion.
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RB721Q-40
Diodes
Schottky barrier diode RB721Q-40
Applications External dimensions (Unit : mm)
Low current rectification
CATHODE BAND (BLACK) TYPE NO. (BLACK)
Features 1) Glass sealed envelope. (MSD) 2) Low VF, Low IR
3) High reliability φ1.8±0.2
ROHM : MSD JEDEC : DO-34
Construction Taping specification s (Unit : mm)
Silicon epitaxial planar
IVORY
AH2 H2 Standard dimension 寸法規格値
Mark 記号
BLUE value (m (mm)
3.2MIN
G2G1 ＊H2(6mm)：BROWN
cf : cumulativ e pitch tolerance with 20 pitch than ±1.5mm 注) 累積ピッチの許容差は20ピッチで±1.5mm以下とする
Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Reverse voltage (repetitive peak) VRM Reverse voltage (DC) VR Average rectified forw
ard current Io m A
orward current surge peak （60Hz・1cyc） IFSM m A
Junction temperature
Storage temperature -40 to +125
Electrical characteristics (Ta = 25°C) Symbol Parameter Conditions
Min. Typ. Max. Unit
orward voltage VF 0.37 IF=1m A Reverse current IR 0.5 µA VR=25V
Capacitance betw een terminals Ct 2.0 p F VR=1V , f=1MHz
Rev.A 1/3
Page Summary Contents For ROHM Schottky barrier diode RB721Q-40 Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 5 |
| File Size | 138.10 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the maximum repetitive peak reverse voltage rating?
The diode can handle a repetitive peak reverse voltage of up to 40 V.
Are these diodes suitable for life-critical or highly reliable equipment (e.g., medical devices)?
No, if your application requires extremely high reliability, you must consult our sales representative in advance.
What are the primary features of this Schottky barrier diode?
It is characterized by low VF, low IR, and utilizes a glass sealed envelope.
Should I rely solely on the illustrated circuit diagrams for my project design?
No; you must pay careful attention to the peripheral conditions when designing circuits and determining associated constants.