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Diodes Incorporated BZT52C43-13
- Part No.:
- BZT52C43-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C43-13.pdf
- Description:
- DIODE ZENER 43V 410MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BZT52C43-13 from Diodes Incorporated is a surface-mount 43 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 40.0–46.0 V nominal zener voltage range at 5 mA test current, used for precision voltage regulation and overvoltage protection in DC power rails and sensor biasing circuits.
For engineers reviewing the BZT52C43-13 datasheet, BZT52C43-13 pinout, BZT52C43-13 application, or BZT52C43-13 equivalent, key selection criteria include zener voltage tolerance (±7%), dynamic impedance (100 Ω @ 5 mA), reverse leakage (0.1 µA @ 32.0 V), temperature coefficient (−5 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage, while the SOD123 package supports automated pick-and-place assembly and meets UL 94V-0 flammability requirements.
The device exhibits a negative temperature coefficient of −5 mV/°C near 43 V, enabling predictable thermal drift compensation in voltage references. It is characterized with 5 mA test current and specified for operation across −65°C to +150°C junction temperature range, with thermal resistance junction-to-ambient of 338°C/W on FR-4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal, 40.0–46.0 V range @ 5 mA - defines regulated output voltage tolerance band |
| Power Dissipation (PD) | 370 mW @ TA = +25°C - maximum continuous power on standard PCB layout |
| Zener Impedance (ZZT) | 100 Ω @ 5 mA - indicates regulation stiffness; lower values yield tighter voltage control under load variation |
| Reverse Leakage (IR) | 0.1 µA @ 32.0 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Temperature Coefficient | −5 mV/°C - quantifies voltage drift per degree Celsius; enables thermal error budgeting in precision designs |
| Junction Temperature Range | −65°C to +150°C - supports operation in extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking, 0.010 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated rail; forms reference ground for shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to higher-potential side; maintains fixed voltage drop relative to anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown voltage and low parameter spread across production lots |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU; matte tin plating ensures reliable solder wetting and intermetallic formation |
| SOD123 footprint compatibility | Standardized 2.65 mm × 1.55 mm outline enables drop-in replacement in existing layouts |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 12 V battery rail in ECU to detect overvoltage events above 14.5 V. IC Role / Device Role / Timing Role: Shunt regulator clamping transient spikes and providing stable reference for comparator input. Use Value: 43 V rating allows safe margin above nominal 12 V system; 0.1 µA leakage minimizes parasitic drain on always-on circuits. | Use Scenario: Biasing a precision temperature sensor IC requiring stable 5 V reference derived from 24 V supply. IC Role / Device Role / Timing Role: Zener-based voltage divider generating accurate reference point for ADC input scaling. Use Value: 100 Ω dynamic impedance ensures <10 mV shift under 100 µA load variation-critical for ±0.1% sensor accuracy. |
| Consumer IoT Device Battery Protection | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Preventing Li-ion battery overcharge in portable health monitor by clamping charging circuit at 4.2 V. IC Role / Device Role / Timing Role: Overvoltage clamp placed between charger IC output and battery terminal. Use Value: Not applicable - this part's 43 V rating exceeds typical Li-ion requirements; included only for illustrative contrast of voltage selection logic. | Use Scenario: Generating controlled power-up sequence timing via RC network referenced to stable Zener voltage. IC Role / Device Role / Timing Role: Voltage reference for reset supervisor IC enabling deterministic boot timing. Use Value: −5 mV/°C TC enables predictable delay shift across −20°C to +70°C operating range, supporting IEC 60601 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5243B-7-F | Same 43 V nominal, but 350 mW PD @ TA, SOT-23 package, 120 Ω ZZT | Higher thermal resistance limits power handling in compact layouts; smaller footprint reduces board area | Select when space-constrained PCBs prioritize size over power margin |
| BZX84-C43 | 43 V nominal, 300 mW PD, SOT-23, 150 Ω ZZT, no AEC-Q101 qualification | Lacks automotive reliability validation; higher impedance degrades regulation under dynamic loads | Acceptable for commercial-grade consumer products where cost and qualification are secondary |
Compared with MMBZ5243B-7-F and BZX84-C43, BZT52C43-13 delivers superior power handling (370 mW vs. ≤350 mW), lower dynamic impedance (100 Ω), and AEC-Q101 qualification-making it optimal for automotive and industrial applications demanding robust voltage reference stability under thermal stress.
Availability
BZT52C43-13 is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial sensor signal conditioning, and medical diagnostic equipment power sequencing requiring stable component supply and long-term lifecycle continuity.
Supply support for BZT52C43-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations spanning Asia, Europe, and North America.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and overvoltage protection in cost-sensitive, high-volume applications across automotive, industrial, and consumer markets.
FAQ
What is the maximum reverse voltage (VR) that BZT52C43-13 can withstand before breakdown?
The BZT52C43-13 has a nominal zener voltage of 43 V with a guaranteed range of 40.0–46.0 V at 5 mA test current. Breakdown occurs within this range; the device is not rated for sustained reverse voltage above its specified VZ without entering conduction. Its absolute maximum reverse voltage is defined by the zener specification-not a separate VR rating.
Is BZT52C43-13 suitable for use in high-frequency noise suppression?
No-this Zener diode is optimized for DC and low-frequency voltage regulation, not RF filtering. Its typical capacitance is not specified in the datasheet, and its dynamic impedance (100 Ω) and construction are unsuited for shunting MHz-range transients. TVS diodes or ceramic capacitors are preferred for high-frequency ESD or noise suppression.
Does BZT52C43-13 require a series current-limiting resistor in all applications?
Yes-because it operates in reverse breakdown, a series resistor is mandatory to limit current and prevent thermal runaway. The resistor value must be selected so that worst-case power dissipation (I2R) stays within the 370 mW limit at ambient temperature, accounting for input voltage variation and load current draw.
Can BZT52C43-13 replace a 47 V Zener diode in an existing design?
No-its 43 V nominal rating differs from 47 V by ~9%, exceeding typical tolerance budgets for voltage-critical circuits. Substituting would shift reference points, potentially causing comparator mis-triggers or ADC scaling errors. Use BZT52C47-13 if 47 V regulation is required.
BZT52C43-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±7%
- Power - Max:
- 410 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 32 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C43-13 FAQ
1.How can I place an order for BZT52C43-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C43-13 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 BZT52C43-13 reliable?
The price and inventory of BZT52C43-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C43-13 is usually 5 days.
3.What payment methods are accepted for BZT52C43-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C43-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C43-13?
BZT52C43-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C43-13 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 BZT52C43-13?
For technical support, including BZT52C43-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C43-13 requirements.
6.How does Aetrix verify that BZT52C43-13 is sourced from the original manufacturer or authorized distributors?
All BZT52C43-13 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 BZT52C43-13 meets industry standards.
7.What is the process for return or replacement of BZT52C43-13?
All BZT52C43-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C43-13, 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 BZT52C43-13 part is unused and in its original packaging.
Return procedure for BZT52C43-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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