My Inquiry
My Account
Nexperia USA Inc. BZX84-C20/DG/B3,21
- Part No.:
- BZX84-C20/DG/B3,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C20/DG/B3,21.pdf
- Description:
- DIODE ZENER 20V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,437
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84-C20/DG/B3,21 from Nexperia is a surface-mount Zener diode with 20 V nominal breakdown voltage, 250 mW power dissipation, and ±5% tolerance, designed for voltage regulation and overvoltage protection in low-power signal conditioning circuits.
For engineers reviewing the BZX84-C20/DG/B3,21 datasheet, BZX84-C20/DG/B3,21 pinout, BZX84-C20/DG/B3,21 application, or BZX84-C20/DG/B3,21 equivalent, key selection criteria include Zener voltage accuracy, dynamic impedance at test current, temperature coefficient, maximum reverse leakage, and SOT-23 package thermal performance.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified test current of 5 mA. Its 20 V nominal Zener voltage is maintained across an operating junction temperature range of −65 °C to +150 °C.
Dynamic impedance is 50 Ω max at 5 mA, and reverse leakage current is ≤100 nA at 15.2 V. The device complies with AEC-Q101 for automotive-grade reliability and supports stable regulation under transient load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at IZ = 5 mA - defines regulated output level in shunt regulator designs |
| Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - limits continuous energy handling in SOT-23 footprint |
| Dynamic Impedance (ZZT) | ≤50 Ω at IZ = 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | ≤100 nA at VR = 15.2 V - ensures minimal quiescent current in standby protection circuits |
| Temperature Coefficient (αVZ) | +4.5 mV/K typical - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Junction-to-Ambient Thermal Resistance (RthJA) | 470 K/W - defines steady-state temperature rise above ambient at full power in still air |
Pinout & Package
SOT-23 plastic surface-mount package with three terminals: Anode (Pin 1), Cathode (Pin 2), and unused terminal (Pin 3) - Pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during non-regulation states |
| Pin 2 | Cathode | Connected to regulated voltage rail; conducts reverse current during Zener breakdown |
| Pin 3 | No Connection | Internally floating; must not be soldered to PCB trace or ground plane to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | Ensures tight output voltage regulation (<±20 mV change) under ±1 mA load variation at 5 mA bias |
| AEC-Q101 qualified | Validated for automotive electronics use including body control modules and sensor interface circuits |
| ±5% Zener voltage tolerance | Enables direct replacement in legacy 20 V reference designs without recalibration |
| SOT-23 footprint compatibility | Supports automated placement and reflow soldering on high-density PCBs with 0.95 mm pitch |
Applications
| Automotive Sensor Reference | Industrial Signal Conditioning |
|---|---|
Use Scenario: Providing stable 20 V reference for analog front-end amplifiers in wheel speed sensors. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining excitation voltage accuracy despite battery voltage fluctuations. Use Value: Enables <±0.5% measurement error in rotational speed detection over −40 °C to +125 °C ambient. | Use Scenario: Clamping input transients on 24 V industrial I/O lines exposed to ESD and inductive kickback. IC Role / Device Role / Timing Role: Overvoltage protection element limiting line voltage to 20 V during surge events. Use Value: Prevents damage to downstream ADC drivers while maintaining <10 ns response time to 1 kV/μs transients. |
| Consumer Power Management | Medical Instrumentation |
Use Scenario: Regulating bias voltage for LED backlight drivers in portable displays. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator stabilizing 20 V supply for current-source control. Use Value: Maintains consistent LED brightness across 3.0–5.5 V battery range with <2% luminance variation. | Use Scenario: Setting precision threshold in patient isolation amplifier fault-detection circuitry. IC Role / Device Role / Timing Role: Voltage reference defining trip point for overvoltage alarm activation. Use Value: Guarantees alarm triggers within ±0.1 V of 20 V setpoint under long-term aging and humidity exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4702T1G | 20 V ±5%, 500 mW rating, SOD-123 package | Higher power handling but larger footprint and higher thermal resistance (625 K/W) | Preferred where board space allows and >250 mW dissipation is required |
| BZX84-C20,215 | Identical electrical specs, same SOT-23 package, differing tape-and-reel packaging (7" vs 13" reel) | No functional difference; reel size affects pick-and-place feeder compatibility | Select based on SMT line feeder configuration and minimum order quantity requirements |
Compared with BZX84-C20/DG/B3,21, MMSZ4702T1G offers double power capacity at the cost of PCB area and thermal performance, while BZX84-C20,215 provides identical regulation behavior with logistics-level packaging variance only.
Availability
BZX84-C20/DG/B3,21 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial signal conditioning, and medical instrumentation requiring stable component supply with AEC-Q101 qualification and SOT-23 footprint consistency.
Supply support for BZX84-C20/DG/B3,21 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX84 series belongs to Nexperia's standard Zener diode product line, engineered for precision voltage reference and clamping in space-constrained, thermally demanding applications.
FAQ
What is the maximum reverse leakage current for BZX84-C20/DG/B3,21 at 15.2 V?
The maximum reverse leakage current is 100 nA when measured at 15.2 V and 25 °C ambient temperature, as specified in Nexperia's official datasheet revision 2023-05. This value ensures minimal standby power loss in always-on protection circuits and remains stable up to 125 °C junction temperature.
Is BZX84-C20/DG/B3,21 suitable for automotive applications?
Yes - it is qualified to AEC-Q101 Grade 1 (−40 °C to +125 °C), with tested robustness against mechanical shock, temperature cycling, and humidity exposure. It is deployed in automotive body control modules and sensor interfaces where 20 V reference stability and reliability are critical.
How does the SOT-23 pinout differ between BZX84-C20/DG/B3,21 and BZX84-C20,215?
Both share identical SOT-23 pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = No Connection. The "DG/B3" and "215" suffixes denote tape-and-reel packaging variants (13" vs 7" reels) and do not affect pinout, electrical behavior, or thermal characteristics.
What is the typical temperature coefficient of BZX84-C20/DG/B3,21?
The typical temperature coefficient is +4.5 mV/K, meaning the Zener voltage increases by approximately 4.5 mV for every 1 K rise in junction temperature. This positive coefficient is characteristic of 20 V Zener diodes and enables predictable compensation in temperature-sensitive reference designs.
BZX84-C20/DG/B3,21 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C20/DG/B3,21 FAQ
1.How can I place an order for BZX84-C20/DG/B3,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C20/DG/B3,21 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX84-C20/DG/B3,21 reliable?
The price and inventory of BZX84-C20/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C20/DG/B3,21 is usually 5 days.
3.What payment methods are accepted for BZX84-C20/DG/B3,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C20/DG/B3,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C20/DG/B3,21?
BZX84-C20/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C20/DG/B3,21 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX84-C20/DG/B3,21?
For technical support, including BZX84-C20/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C20/DG/B3,21 requirements.
6.How does Aetrix verify that BZX84-C20/DG/B3,21 is sourced from the original manufacturer or authorized distributors?
All BZX84-C20/DG/B3,21 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX84-C20/DG/B3,21 meets industry standards.
7.What is the process for return or replacement of BZX84-C20/DG/B3,21?
All BZX84-C20/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C20/DG/B3,21, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX84-C20/DG/B3,21 part is unused and in its original packaging.
Return procedure for BZX84-C20/DG/B3,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C20/DG/B3,21 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
