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BZX84-C18,215

Name: BZX84-C18,215
Rating: 4.7 (12 reviews)

DIODE ZENER 18V 250MW TO236AB

製造商
製造商。部分 #BZX84-C18,215
包 TO-236-3, SC-59, SOT-23-3
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規格

Supplier	Nexperia USA Inc.
Package	Tape & Reel (TR),Cut Tape (CT)
Series	Automotive, AEC-Q101
ProductStatus	Active
Voltage-Zener(Nom)(Vz)	18 V
Tolerance	±5%
Power-Max	250 mW
Impedance(Max)(Zzt)	45 Ohms
Current-ReverseLeakage@Vr	50 nA @ 12.6 V
Voltage-Forward(Vf)(Max)@If	900 mV @ 10 mA
OperatingTemperature	-65°C ~ 150°C
MountingType	Surface Mount
Package/Case	TO-236-3, SC-59, SOT-23-3

概述

Description

BZX84-C18 is a small-signal Zener diode (two-terminal) from the BZX84 family, typically in a SOT-23 package. It is used for voltage regulation and over‑voltage protection in low‑power circuits.
Key points:
- Zener voltage: nominal 18 V (Vz ≈ 18 V at Izt ~ 5 mA)
- Tolerance: suffix C ≈ ±5%
- Power rating: about 0.5 W (Ptot)
- Reverse voltage rating: slightly above Vz (roughly ~20 V max)
- Package: SOT-23, two-terminal device
- Izt, Zzt, and Izm are datasheet-specified and vary by manufacturer
Applications: simple voltage clamps, reference/regulator parts, and protection in microcontroller/power-supply circuits.
Note: The “215” in a full part number is usually a date/lot code and not an electrical spec. For exact parameters, refer to the specific manufacturer’s datasheet.

Features

BZX84-C18 is a Zener diode with 18 V nominal breakdown.
Key features:
- Zener voltage: 18 V (nominal), tolerance ±5% (code C)
- Power rating: 0.5 W (500 mW) at 25°C
- Package: SOT-23 surface-mount (3-pin)
- Temperature range: typically -55°C to +125°C (operating)
- RoHS-compliant
- Useful for: voltage regulation, reference/clamp protection in low-current circuits
Note: exact ZZT, IZK, and dynamic impedance vary by lot; consult datasheet for precise specs.

Package

The BZX84-C18 is in a SOT-23 (3-pin) surface-mount package.

Pinout

- Pin count: 3 pins (SOT-23 package)
- Function: Zener diode (BZX84-C18), 18 V nominal zener voltage. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not Connected. Used to clamp/regulate voltage in reverse breakdown.

Manufacturer

BZX84‑C18 is an 18 V SMD Zener diode made by multiple semiconductor manufacturers (examples: Diodes Incorporated, Vishay, Nexperia, ROHM, ON Semiconductor). These makers are semiconductor companies that design and manufacture discrete components (diodes, transistors), analog ICs and related electronic parts.

Application

BZX84-C18 (18 V) and BZX84-C21 (21 V) are small-signal Zeners in SOT-23. Applications:
- Fixed shunt regulators for low-power supplies and rail clamping
- Reference voltages for regulators, comparators, and ADCs
- Overvoltage/transient protection on 18–21 V rails
- I/O protection and ESD/surge suppression networks
- Simple protection in telecom/industrial circuits with limited current
(Uses general; suitable where a stable ~18–21 V reference/clamp is needed.)

Equivalent

Equivalents are any 18 V Zener diodes with similar package/power. Common substitutes:
- BZT52C18 (SMD)
- BZV55C18
- MMSZ5221B‑18 (or MMSZ5221B series, SMD)
- 1N4747A (18 V, through‑hole, higher power)
Always verify power dissipation, tolerance and package footprint before replacing.