onsemi MZX84C3V9LT1G

View All Single, Pre-Biased Bipolar Transistors by onsemi

Part Number:
MZX84C3V9LT1G
Manufacturer:
onsemi
Category:
Single, Pre-Biased Bipolar Transistors
RoHs:
Non-RoHS Compliant
Datasheet:
Description:
Zener Diodes 3.9V 250mW
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Overview

BZX84C3V9LT1G – Complete Specification Summary

1. Basic Device Information

Manufacturer: onsemi
Part Number: BZX84C3V9LT1G
Document: BZX84C2V4LT1/D (Rev. 23, August 2021)
Device Type: Surface‑Mount Zener Diode (Voltage Regulator)
Package: SOT‑23 (Case 318, Style 8)
Top Marking: Z16
Status: Active
RoHS / Pb‑Free: Compliant
Flammability: UL 94 V‑0

2. Key Features

250 mW power dissipation on FR‑4/FR‑5 board
Zener voltage: 3.9 V (±5% tolerance)
Compact SOT‑23 package for high‑density PCBs
ESD capability: >16 kV (HBM)
Ideal for portable electronics and low‑profile regulators
Automotive version (SZBZX84C3V9LT1G) available (AEC‑Q101, PPAP)
Suitable for automated assembly

3. Pin Configuration (SOT‑23, Top View)

Pin No.	Name	Description
1	Anode	Positive terminal (typically GND)
2	NC	No connection
3	Cathode	Zener cathode (voltage reference)

4. Absolute Maximum Ratings

Total power dissipation (TA = 25°C): 250 mW
Derating factor: 2 mW/°C above 25°C
Thermal resistance, junction‑to‑ambient (RθJA): 500°C/W
Junction and storage temperature range: –65°C to +150°C
Lead soldering temperature: 260°C (10 s max)

5. Electrical Characteristics (TA = 25°C)

Parameter	Value	Unit
Zener voltage (VZ) @ IZT = 5 mA	3.7 / 3.9 / 4.1	V (min / nom / max)
Zener impedance (ZZT1) @ 5 mA	90	Ω
Zener voltage @ 1 mA (VZ2)	3.3	V
Zener impedance @ 1 mA (ZZT2)	600	Ω
Zener voltage @ 20 mA (VZ3)	4.1	V
Zener impedance @ 20 mA (ZZT3)	30	Ω
Reverse leakage current (IR) @ VR = 0	≤1	μA
Temperature coefficient of VZ	–3.5	mV/°C
Forward voltage (VF) @ IF = 10 mA	≤0.9	V
Junction capacitance (C) @ VR = 0, 1 MHz	450	pF

6. Mechanical Specifications

Package type: SOT‑23 (TO‑236)
Dimensions: 2.90 × 1.30 × 1.00 mm
Lead pitch: 1.90 mm
Moisture sensitivity level: MSL 1 (unlimited floor life)
Finish: Matte tin, solderable

7. Packaging & Ordering

Standard packaging: Tape‑and‑reel
Quantity: 3000 units per 7‑inch reel
Alternative part: BZX84C3V9LT3G (10,000 units per 13‑inch reel)
Automotive grade: SZBZX84C3V9LT1G

8. Typical Applications

Voltage regulation and reference
Portable electronics (mobile phones, wearables)
High‑density PCB circuits
Low‑power industrial and consumer systems
Signal clamping and ESD protection

9. Recommended Operating Conditions

Zener current: 1 mA to 20 mA
Operating temperature: –40°C to +85°C (commercial)
Power derating applied above 25°C

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