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Nexperia USA Inc. BZT52-C75J
- Part No.:
- BZT52-C75J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C75J.pdf
- Description:
- DIODE ZENER 74.5V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:303
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Product details
Overview
BZT52-C75J from Nexperia is a 75 V ±5 % tolerance Zener diode in SOD123 surface-mount package, designed for precision voltage regulation and reference functions in low-power analog circuits. It delivers 590 mW total power dissipation at 25 °C ambient, exhibits 400 Ω maximum differential resistance at IZ = 2 mA, and maintains stable reverse breakdown with <0.05 μA reverse current at VR = 57 V - used in power supply feedback loops and sensor biasing networks.
For engineers reviewing the BZT52-C75J datasheet, BZT52-C75J pinout, BZT52-C75J application, or BZT52-C75J equivalent, key selection criteria include its 75 V nominal Zener voltage with ±5 % tolerance, SOD123 thermal performance (Rth(j-a) = 350 K/W), cathode-anode polarity marking, and suitability for non-automotive industrial voltage reference designs requiring stable 75 V clamping.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 75 V reference across varying load currents. Its temperature coefficient of +52.5 mV/K at IZ = 5 mA indicates positive drift with junction temperature, requiring compensation in high-stability references.
The device uses silicon planar epitaxial construction with low parasitic capacitance (35 pF at 1 MHz, VR = 0 V) and supports non-repetitive peak reverse current up to 0.20 A (100 μs pulse). It is rated for operation from −55 °C to +150 °C ambient, with maximum junction temperature limited to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 75 V nominal at IZ = 2 mA; ±5 % tolerance ensures regulation within 70–79 V under production conditions |
| Differential resistance rdif | 400 Ω max at IZ = 2 mA; defines output impedance and load regulation error in reference circuits |
| Reverse current IR | <0.05 μA at VR = 57 V; enables ultra-low quiescent current in battery-powered voltage monitors |
| Total power dissipation Ptot | 590 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad; sets maximum continuous DC power handling |
| Thermal resistance Rth(j-a) | 350 K/W in free air; determines junction-to-ambient temperature rise per watt, critical for derating above 25 °C |
| Forward voltage VF | 0.9 V max at IF = 10 mA; defines conduction loss when used in series forward-biased protection paths |
| Non-repetitive peak reverse current IZSM | 0.20 A at tp = 100 μs; supports transient overvoltage clamping without permanent damage |
Pinout & Package
SOD123 plastic surface-mount package: 2-terminal, flat lead, 2.80 mm × 1.70 mm body, 0.70 mm lead pitch, cathode marked by band on end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking band identifies this terminal; carries reverse current during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path; must be routed with low-inductance trace for transient response |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 75 V nominal in E24 series enables precise matching to legacy 75 V system rails and feedback dividers |
| Low differential resistance | 400 Ω max improves load regulation accuracy in 1–10 mA reference applications |
| Small SMD footprint | SOD123 package allows high-density placement on compact PCBs without through-hole drilling |
| Stable temperature coefficient | +52.5 mV/K at IZ = 5 mA enables predictable drift modeling for compensated reference designs |
| High surge capability | 0.20 A non-repetitive peak reverse current supports 75 V transient suppression in low-energy interfaces |
Applications
| Power Supply Feedback Loop | Sensor Bias Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener diode provides stable 75 V reference for TL431 shunt regulator input threshold. Use Value: Enables accurate 12 V or 24 V output regulation with <±1 % line/load variation due to tight 75 V tolerance and low rdif. |
Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) in industrial process controllers. IC Role / Device Role / Timing Role: Acts as precision voltage source for constant-current generation via series resistor. Use Value: Delivers stable 75 V bias with <0.05 μA leakage, minimizing self-heating error in high-impedance RTD bridges. |
| Overvoltage Clamp Circuit | Microcontroller Reset Supervisor |
Use Scenario: Protecting ADC inputs from transient surges in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Clamps induced spikes above 75 V to prevent damage to downstream analog front-end. Use Value: Absorbs 0.20 A surges (100 μs) without degradation, preserving signal chain integrity in harsh EMI environments. |
Use Scenario: Generating reliable reset signals for ARM Cortex-M microcontrollers during brown-out events. IC Role / Device Role / Timing Role: Forms part of a comparator-based undervoltage detection circuit with adjustable threshold. Use Value: Provides repeatable 75 V reference for scaling down to 3.3 V reset thresholds via resistor divider, ensuring deterministic startup behavior. |
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 MMBZ5275B | 75 V ±5 %, 350 mW Ptot, SOD-123, but higher rdif (500 Ω max) and wider tempco (±3.5 mV/K) | Less stable under varying load/temperature; suitable only where cost outweighs regulation precision | Select when legacy ON Semi BOM compatibility is required and 75 V tolerance is acceptable without tight rdif control |
| Vishay BZX84-C75 | 75 V ±5 %, 300 mW Ptot, SOT-23, lower power rating and smaller thermal mass than SOD123 | Limited to sub-100 mW continuous operation; unsuitable for sustained 75 V clamp duty cycles | Choose only for space-constrained designs where peak power remains below 150 mW and thermal margin is verified |
Compared with MMBZ5275B and BZX84-C75, BZT52-C75J offers superior thermal robustness (590 mW vs. 350/300 mW) and tighter differential resistance (400 Ω vs. 500/600 Ω), making it preferred for industrial-grade 75 V reference and clamping where long-term stability and power handling are critical.
Availability
BZT52-C75J is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and overvoltage protection circuits requiring stable component supply and full traceability.
Supply support for BZT52-C75J 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZT52 series targets general-purpose voltage regulation in consumer, industrial, and computing applications, emphasizing small-footprint SMD reliability and broad E24 voltage coverage from 2.4 V to 75 V.
FAQ
What is the maximum continuous reverse current for BZT52-C75J at 75 V?
The device is not rated for continuous reverse current at 75 V - it operates in Zener breakdown mode with specified test current IZ = 2 mA. Continuous operation must stay within Ptot = 590 mW limit, meaning average reverse current must remain ≤7.87 mA (590 mW ÷ 75 V) at 25 °C ambient with proper PCB thermal design.
Can BZT52-C75J be used in automotive applications?
No - BZT52-C75J is explicitly non-automotive qualified per Nexperia's revision history (v.2, October 2025). It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation beyond −55 °C to +150 °C ambient. Automotive designs require Nexperia's -Q qualified variants such as BZT52-C75J-Q.
How does the cathode marking appear on the SOD123 package?
The cathode is identified by a distinct marking band located at one end of the SOD123 body. Per Figure 11 and Table 2, Pin 1 is cathode (K), and the band aligns with the cathode terminal - visible as a dark stripe or printed bar on the top surface, adjacent to the shorter lead edge in standard orientation.
What is the typical Zener voltage drift over temperature for BZT52-C75J?
At IZ = 5 mA, the temperature coefficient is +52.5 mV/K (Table 10), meaning VZ increases by approximately 52.5 mV per Kelvin rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this yields ~5.25 V total drift - a key factor in unbuffered reference designs requiring external compensation.
BZT52-C75J 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):
- 74.5 V
- Tolerance:
- ±6%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 175 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-C75J FAQ
1.How can I place an order for BZT52-C75J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C75J 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-C75J reliable?
The price and inventory of BZT52-C75J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C75J is usually 5 days.
3.What payment methods are accepted for BZT52-C75J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C75J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C75J?
BZT52-C75J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C75J 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-C75J?
For technical support, including BZT52-C75J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C75J requirements.
6.How does Aetrix verify that BZT52-C75J is sourced from the original manufacturer or authorized distributors?
All BZT52-C75J 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-C75J meets industry standards.
7.What is the process for return or replacement of BZT52-C75J?
All BZT52-C75J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C75J, 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-C75J part is unused and in its original packaging.
Return procedure for BZT52-C75J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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