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Nexperia USA Inc. BZT52-C20J
- Part No.:
- BZT52-C20J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C20J.pdf
- Description:
- DIODE ZENER 20V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,403
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Product details
Overview
BZT52-C20J from Nexperia is a Zener voltage regulator diode in SOD123 package, rated for 20 V nominal Zener voltage at 5 mA, ±5 % tolerance, 590 mW total power dissipation, and 220 Ω maximum differential resistance - used for precision low-power voltage reference and overvoltage clamping in power supply feedback paths.
For engineers reviewing the BZT52-C20J datasheet, BZT52-C20J pinout, BZT52-C20J application, or BZT52-C20J equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (210 K/W junction-to-solder-point), reverse current at 18 V (≤0.05 μA), temperature coefficient (±14 mV/K), and SOD123 footprint compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across a load by conducting reverse current when input exceeds its 20 V Zener threshold. Its low 220 Ω differential resistance ensures minimal voltage drift under varying load currents up to 250 mA peak forward current.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits 210 K/W thermal resistance to solder point and 350 K/W to ambient - enabling reliable operation at junction temperatures up to 150 °C when mounted per recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V to 21.2 V at IZ = 5 mA - defines regulation band for feedback sensing in 20 V nominal systems |
| Tolerance | ±5 % - supports cost-sensitive designs where tight voltage accuracy is not required |
| Differential Resistance (rdif) | 220 Ω max - limits output voltage variation under dynamic load changes |
| Reverse Current (IR) | ≤0.05 μA at VR = 18 V - ensures negligible leakage in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Thermal Resistance (Rth(j-sp)) | 210 K/W - determines temperature rise above solder point under steady-state bias |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss during polarity-reversal protection use |
Pinout & Package
Package: SOD123 - surface-mount plastic package with 2 leads, 2.80 mm length × 1.70 mm width × 1.30 mm height, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD packaging | SOD123 footprint enables high-density layout and compatibility with standard reflow profiles |
| Controlled Zener voltage tolerance | ±5 % allows predictable regulation without trimming in cost-driven consumer power supplies |
| Stable temperature coefficient | ±14 mV/K at IZ = 5 mA minimizes drift across -55 °C to +150 °C operating range |
| Low leakage performance | 0.05 μA max at 90 % of VZ preserves signal integrity in high-impedance reference circuits |
| Robust surge capability | 1.5 A non-repetitive peak reverse current (tp = 100 μs) supports transient overvoltage suppression |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing precise 20 V threshold to control PWM duty cycle. Use Value: ±5 % VZ tolerance and 220 Ω rdif ensure <±1 % output regulation under line/load transients. |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback exceeding 20 V. IC Role / Device Role / Timing Role: Fast-acting clamp diverting excess energy to ground before damage occurs. Use Value: 1.5 A IZSM peak current rating handles 100 μs surges without degradation. |
| Low-Power Voltage Reference | Signal Level Translation |
Use Scenario: Generating stable 20 V bias for analog sensor excitation in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Passive reference source drawing sub-μA quiescent current in standby mode. Use Value: 0.05 μA IR at 18 V enables >10-year battery life in always-on monitoring applications. |
Use Scenario: Shifting logic-level signals between 24 V industrial bus and 3.3 V MCU interface. IC Role / Device Role / Timing Role: Bidirectional level translator using forward conduction (0.9 V drop) and reverse breakdown (20 V clamp). Use Value: Dual-mode operation eliminates need for separate clamp and series resistor in simple interface designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5242B | 20 V nominal, ±5 %, 350 mW Ptot, 250 Ω rdif, SOT-23 package | Higher thermal resistance (400 K/W j-a) limits power handling on compact boards | Prefer when SOT-23 footprint is already standardized and full 590 mW is not required |
| Vishay BZX84-C20 | 20 V nominal, ±5 %, 300 mW Ptot, 220 Ω rdif, SOT-23 package | Lower power rating restricts use to sub-150 mW continuous dissipation | Choose for legacy SOT-23 designs where board space is constrained and thermal margin exists |
Compared with MMBZ5242B and BZX84-C20, BZT52-C20J delivers 97 % higher power capability in same-class tolerance while maintaining identical differential resistance - making it optimal for thermally constrained 20 V reference designs requiring sustained dissipation.
Availability
BZT52-C20J is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power voltage reference applications requiring stable component supply and consistent SOD123 footprint compliance.
Supply support for BZT52-C20J 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency and miniaturization in high-volume applications.
The BZT52 series targets cost-sensitive, space-constrained power management functions - delivering standardized Zener regulation across 2.4 V–75 V with consistent SOD123 packaging and automotive-grade reliability options.
FAQ
What is the maximum continuous reverse current the BZT52-C20J can handle at 25 °C ambient?
The BZT52-C20J does not specify a maximum continuous reverse current; instead, its safe operating area is defined by total power dissipation. At 25 °C ambient, it supports up to 29.5 mA continuous Zener current (590 mW ÷ 20 V), assuming ideal heat sinking. Derating is required above 25 °C per the 210 K/W junction-to-solder-point thermal resistance.
Can BZT52-C20J be used in place of a BZT52-B20 diode?
No - BZT52-C20J has ±5 % Zener voltage tolerance (18.8–21.2 V), while BZT52-B20 offers ±2 % (19.6–20.4 V). Substituting introduces up to ±3 % additional voltage uncertainty, which may violate regulation accuracy requirements in precision feedback loops or reference circuits.
Does the SOD123 package support hand-soldering repair?
Yes, but with strict process control: use fine-tip iron (<0.5 mm), limit dwell time to <3 seconds per pad, apply no mechanical stress during cooling, and verify post-solder cathode band alignment. Reflow is strongly preferred; hand-soldering risks delamination or thermal damage to the die attach.
How does the temperature coefficient affect regulation stability over -40 °C to +85 °C?
With a specified ±14 mV/K coefficient at 5 mA, BZT52-C20J exhibits up to ±630 mV total drift across 45 K ΔT - meaning regulation shifts from ~19.37 V to ~20.63 V. For tighter stability, pair with NTC compensation or operate near 25 °C where coefficient crosses zero in the 20 V range.
BZT52-C20J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52-C20J FAQ
1.How can I place an order for BZT52-C20J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C20J 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 BZT52-C20J reliable?
The price and inventory of BZT52-C20J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C20J is usually 5 days.
3.What payment methods are accepted for BZT52-C20J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C20J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C20J?
BZT52-C20J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C20J 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 BZT52-C20J?
For technical support, including BZT52-C20J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C20J requirements.
6.How does Aetrix verify that BZT52-C20J is sourced from the original manufacturer or authorized distributors?
All BZT52-C20J 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 BZT52-C20J meets industry standards.
7.What is the process for return or replacement of BZT52-C20J?
All BZT52-C20J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C20J, 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 BZT52-C20J part is unused and in its original packaging.
Return procedure for BZT52-C20J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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