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Nexperia USA Inc. BZT52-C43J
- Part No.:
- BZT52-C43J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C43J.pdf
- Description:
- DIODE ZENER 43V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
BZT52-C43J from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 43 V nominal Zener voltage at IZ = 2 mA, with 325 Ω maximum differential resistance and 80 μA reverse current at VR = 40 V, used for precision voltage reference and low-power regulation in power supply feedback paths.
For engineers reviewing the BZT52-C43J datasheet, BZT52-C43J pinout, BZT52-C43J application, or BZT52-C43J equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (Rth(j-a) = 350 K/W), peak reverse surge capability (0.6 A at 100 μs), and SOD123 footprint compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 43 V nominal Zener voltage is specified at 2 mA test current, with temperature coefficient of +0.05 mV/K at IZ = 5 mA, indicating minimal drift over operating range.
The device exhibits low forward voltage (≤ 0.9 V at 10 mA) and high non-repetitive peak reverse current capability (0.6 A), enabling use in transient suppression and clamping circuits where fast response and robust surge handling are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 40.0 V to 46.0 V at IZ = 2 mA - defines regulation setpoint with ±5 % tolerance band for stable reference generation |
| Differential Resistance rdif | 325 Ω max - determines output impedance and regulation error under load variation |
| Reverse Current IR | 80 μA max at VR = 40 V - ensures low leakage in standby or high-impedance bias networks |
| Total Power Dissipation Ptot | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature Tj | 150 °C max - defines upper thermal limit for reliable long-term operation |
| Thermal Resistance Rth(j-a) | 350 K/W - quantifies self-heating rise per watt dissipated in free-air mounting |
Pinout & Package
SOD123 surface-mount plastic package with 2 leads, 1.7 mm width, 3.75 mm length, and 1.3 mm height; cathode marked by a visible band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal defining reverse-bias orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective voltage referencing without trimming, suitable for non-critical regulation tasks |
| Low differential resistance (325 Ω) | Minimizes output voltage deviation across 0–2 mA load current changes in feedback loops |
| Non-repetitive peak reverse current (0.6 A) | Supports transient overvoltage clamping in low-energy surge events without failure |
| SOD123 footprint compatibility | Matches industry-standard reflow soldering profiles and pick-and-place machine tooling |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback networks using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage to bias optocoupler LED, closing regulation loop. Use Value: 43 V rating allows direct sensing of 48 V bus rails; ±5 % tolerance accommodates design margin without calibration. |
Use Scenario: Protecting microcontroller GPIO pins from ESD or inductive kickback in industrial sensor interfaces. IC Role / Device Role / Timing Role: Clamps transient voltages above 43 V to prevent damage to downstream logic inputs. Use Value: 0.6 A non-repetitive surge rating handles typical 100 μs transients; SOD123 size enables placement near protected node. |
| Low-Power Voltage Monitor | Reference for Analog Comparators |
Use Scenario: Detecting brown-out conditions in battery-powered IoT nodes operating from 36–48 V LiFePO4 packs. IC Role / Device Role / Timing Role: Supplies stable threshold to comparator input for undervoltage lockout (UVLO) function. Use Value: 80 μA reverse leakage ensures minimal quiescent current drain; 150 °C junction rating supports extended outdoor deployment. |
Use Scenario: Setting precise trip point for analog window comparators in power quality monitoring systems. IC Role / Device Role / Timing Role: Provides fixed reference against which sensed AC line voltage is compared. Use Value: 325 Ω differential resistance limits reference error to <10 mV over 100 μA comparator bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-B43 | ±2 % tolerance, 220 Ω max rdif, same VZ range (42–44 V) | Higher precision needed for closed-loop feedback requiring tighter regulation | Select when VZ stability under temperature and current variation is critical |
| MMBZ5263B | 43 V nominal, ±5 %, SOT-23 package, 350 Ω rdif, 625 mW Ptot | Larger footprint and higher thermal resistance unsuitable for space-constrained layouts | Choose only if SOT-23 is already standardized in existing PCB stack-up |
Compared with BZT52-C43J, BZT52-B43 offers tighter voltage control at the cost of higher unit price, while MMBZ5263B trades SOD123's compactness for slightly higher power rating but poorer thermal performance in dense layouts.
Availability
BZT52-C43J is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp circuits, and low-power voltage monitors requiring stable component supply and consistent SMD packaging.
Supply support for BZT52-C43J 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
BZT52-C43J belongs to the BZT52 series of general-purpose Zener diodes designed for cost-sensitive, surface-mounted voltage regulation and reference applications across consumer, industrial, and computing markets.
FAQ
What is the Zener voltage tolerance for BZT52-C43J?
The BZT52-C43J has a ±5 % Zener voltage tolerance, meaning its nominal 43 V rating spans 40.0 V to 46.0 V at IZ = 2 mA. This tolerance is confirmed in Table 9 of the Nexperia datasheet and applies to all C-series variants in the BZT52 family.
Can BZT52-C43J be used in place of a 43 V TL431-based shunt regulator?
No - BZT52-C43J is a passive two-terminal Zener diode without active regulation or adjustable output. It lacks the 2.5 V reference, error amplifier, and output transistor of TL431. It can serve only as a fixed-voltage clamp or coarse reference, not as a programmable shunt regulator.
What is the maximum continuous reverse current before thermal runaway?
At 25 °C ambient, BZT52-C43J sustains up to 13.1 mA continuously (590 mW ÷ 43 V ≈ 13.1 mA) before exceeding its 590 mW total power dissipation limit. Derating is required above 25 °C per the 350 K/W thermal resistance specification.
Is BZT52-C43J qualified for automotive applications?
No - per Nexperia's revision history (Table 11), C-series BZT52 devices were explicitly changed to non-automotive qualification in Rev. 2. Automotive use requires the -Q qualified variants (e.g., BZT52-C43J-Q), which undergo additional AEC-Q200 stress testing and PPAP documentation.
BZT52-C43J 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):
- 43 V
- Tolerance:
- ±7%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 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-C43J FAQ
1.How can I place an order for BZT52-C43J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C43J 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-C43J reliable?
The price and inventory of BZT52-C43J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C43J is usually 5 days.
3.What payment methods are accepted for BZT52-C43J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C43J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C43J?
BZT52-C43J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C43J 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-C43J?
For technical support, including BZT52-C43J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C43J requirements.
6.How does Aetrix verify that BZT52-C43J is sourced from the original manufacturer or authorized distributors?
All BZT52-C43J 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-C43J meets industry standards.
7.What is the process for return or replacement of BZT52-C43J?
All BZT52-C43J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C43J, 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-C43J part is unused and in its original packaging.
Return procedure for BZT52-C43J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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