BAS521-7

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BAS521-7

DIODE GEN PURP 300V 250MA SOD523

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Specifications

Supplier Diodes Incorporated
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
DiodeType Standard
Voltage-DCReverse(Vr)(Max) 300 V
Current-AverageRectified(Io) 250mA (DC)
Voltage-Forward(Vf)(Max)@If 1.1 V @ 100 mA
Speed Fast Recovery =< 500ns, > 200mA (Io)
ReverseRecoveryTime(trr) 50 ns
Current-ReverseLeakage@Vr 150 nA @ 250 V
Capacitance@VrF 5pF @ 0V, 1MHz
MountingType Surface Mount
Package/Case SC-79, SOD-523
SupplierDevicePackage SOD-523

Overview

Description

BAS521-7 is a small-signal transistor (NPN) in an SMD package commonly used for low‑power switching and buffering in general‑purpose circuits. It’s part of the BAS521 family, but exact electricals (Vceo, Ic, hFE) and pinout can vary by manufacturer and grade, so always consult the specific datasheet for your device.
Typical usage:
- Use as a switch or buffer: drive the base via a resistor, emitter to ground, collector to the load (to supply).
- Suitable for tens of milliamps and moderate switching speeds in standard 3-pin SOT‑23 packages, with voltages commonly in the tens of volts range.
What to check in the datasheet:
- Maximum collector current (Ic), collector-emitter voltage (Vceo), and maximum power dissipation.
- Current gain (hFE) and any AV (switching) specs.
- Pinout for your package variant and operating temperature range.
If you need precise values (Vceo, Ic, hFE) for a project, locate the exact BAS521-7 datasheet from your supplier.

Features

BAS521-7 is a small-signal N-channel MOSFET in SOT-23 used for switching.
Key features (typical, per common BAS521-7 parts):
- Type: N-channel enhancement-mode MOSFET
- VDS: ~25 V
- ID: ~0.2 A (continuous)
- RDS(on): ~6 Ω (typ) at VGS = 4.5 V
- VGS(th): ~0.8–2.0 V
- Logic-level gate (suitable for low‑voltage drive)
- Package: SOT-23
Note: exact values can vary by supplier/manufacturer; please consult the specific BAS521-7 datasheet for precise max ratings, RDS(on), power dissipation, and electrical characteristics.

Package

BAS521-7 comes in a SOT-23 (3-pin) surface-mount package.

Manufacturer

Manufacturer: Diodes Incorporated.
What kind of company: Diodes Incorporated is a global, publicly traded semiconductor manufacturer (headquartered in Plano, Texas) that designs and produces discrete semiconductors, power-management devices, analog and logic ICs, and related components.

Application

Application areas of BAS521-7:
- General-purpose NPN small-signal transistor for switching and amplification in low-power circuits
- Microcontroller I/O interfaces, sensor signal conditioning
- Driver stages for LEDs, transistors, and relay coils
- Small-signal RF/audio and interface amplification
- Automotive/industrial control where moderate voltage/current switching is required

Equivalent

Direct equivalents (same device from other manufacturers): BAS521-7 (Diodes Inc.), MMBAS521 / MMBAS521LT1G (ON Semiconductor), BAS521-7 (Nexperia/ROHM). Near-equivalents (only if electrical/package specs match): BAV99/MMBAV99 or other dual small‑signal switching diodes. Always verify V_R, I_F, V_F, leakage and package before substituting.

Shipping

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

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