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Nexperia USA Inc. BZT52-C75X
- Part No.:
- BZT52-C75X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C75X.pdf
- Description:
- DIODE ZENER 74.5V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
BZT52-C75X from Nexperia is a general-purpose Zener diode in SOD123 surface-mount package, designed for precision voltage regulation at 75 V nominal Zener voltage (IZ = 2 mA), with ±5 % tolerance, 400 Ω maximum differential resistance, and 175 μA reverse current at VR = 70 V - used in power supply reference and overvoltage protection circuits.
For engineers reviewing the BZT52-C75X datasheet, BZT52-C75X pinout, BZT52-C75X application, or BZT52-C75X equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (Rth(j-a) = 350 K/W), peak surge capability (IZSM = 0.20 A), and SOD123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations, with temperature coefficient SZ = +0.05 mV/K at IZ = 5 mA and junction-to-ambient thermal resistance of 350 K/W on FR4 PCB. Its low 0.9 V forward voltage (IF = 10 mA) supports bidirectional clamping verification during testing.
The device complies with IEC 60134 absolute maximum ratings: 150 °C max junction temperature, 250 mA max forward current, and non-repetitive 40 W peak reverse power dissipation (tp = 100 μs). It is non-automotive qualified per Nexperia's 2025 revision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 70.0 V to 79.0 V at IZ = 2 mA - defines regulation window for high-voltage reference stability |
| Tolerance | ±5 % - specifies allowable deviation from nominal 75 V, critical for precision feedback loops |
| Differential Resistance (rdif) | 400 Ω max - determines output impedance and load regulation error under current variation |
| Reverse Current (IR) | 175 μA max at VR = 70 V - indicates leakage level affecting standby power and sensing accuracy |
| Total Power Dissipation (Ptot) | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Thermal Resistance (Rth(j-a)) | 350 K/W - quantifies self-heating rise per watt, essential for derating above 25 °C ambient |
| Peak Reverse Surge Current (IZSM) | 0.20 A (tp = 100 μs) - defines transient overvoltage clamping capacity without damage |
Pinout & Package
Package: SOD123 - small-outline diode plastic surface-mount package with 2 leads, 2.80 mm × 1.70 mm body, 0.70 mm lead pitch, and cathode-marking 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; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | Covers 2.4 V to 75 V in E24 steps - enables single-series sourcing for diverse supply rails |
| Low differential resistance | As low as 400 Ω at 75 V - improves regulation line/load accuracy versus higher-rdif alternatives |
| SMD-compatible footprint | SOD123 outline with 0.81 mm × 2.36 mm solder pad - supports high-density layout and reflow assembly |
| Controlled temperature coefficient | +0.05 mV/K at IZ = 5 mA - minimizes drift over industrial temperature range (−55 °C to +150 °C) |
| High surge robustness | 0.20 A non-repetitive peak reverse current - withstands transient spikes in DC-DC converter feedback paths |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck-boost converters operating above 60 V output. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage to optocoupler input or error amplifier, enabling closed-loop regulation. Use Value: 75 V nominal voltage and ±5 % tolerance ensure accurate setpoint control within safety margins for 72 V nominal systems. |
Use Scenario: Clamping transient surges on 48 V telecom or industrial bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Acts as shunt protector by conducting above 70 V, diverting excess energy to ground before downstream ICs are damaged. Use Value: 0.20 A peak surge rating and 400 Ω rdif allow fast, repeatable clamping without thermal runaway under defined pulse conditions. |
| Signal Level Translation | Threshold Detection |
Use Scenario: Converting 0–100 V analog sensor outputs to microcontroller-safe 0–3.3 V levels using resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Limits divider output swing to 3.3 V by clamping at 75 V input, preventing ADC saturation or ESD damage. Use Value: Low 0.9 V forward voltage ensures bidirectional protection integrity during polarity reversals or test conditions. |
Use Scenario: Detecting battery overcharge condition in 60 V Li-ion packs where voltage exceeds 72 V threshold. IC Role / Device Role / Timing Role: Triggers comparator or supervisor IC when reverse-biased voltage crosses 70 V, signaling fault state. Use Value: 175 μA IR at 70 V ensures minimal quiescent current draw while maintaining reliable turn-on hysteresis. |
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 | Same 75 V nominal, ±5 %, but SOT-23 package (higher Rth(j-a) = 400 K/W) and 500 mW Ptot | Less thermal margin in high-power density layouts; requires larger copper pour for equivalent dissipation | Select if SOT-23 footprint is already standardized and board space permits thermal derating |
| Vishay BZX84-C75 | 75 V nominal, ±5 %, SOT-23 package, 300 mW Ptot, 500 Ω rdif - lower power and higher impedance than BZT52-C75X | Not suitable for >300 mW continuous regulation; limited surge capability (IZSM = 0.15 A) | Choose only for low-power biasing or sensing where 75 V reference suffices and dissipation is <200 mW |
Compared with MMBZ5275B and BZX84-C75, BZT52-C75X delivers superior thermal performance (590 mW vs. ≤300 mW), lower dynamic impedance (400 Ω vs. ≥500 Ω), and higher surge resilience (0.20 A vs. ≤0.15 A), making it optimal for industrial power regulation where reliability under sustained load is critical.
Availability
BZT52-C75X is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and signal level translation requiring stable component supply and SOD123 footprint consistency.
Supply support for BZT52-C75X 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BZT52 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective, surface-mount voltage regulation across consumer, industrial, and communications equipment.
FAQ
What is the Zener voltage tolerance for BZT52-C75X?
The BZT52-C75X has a ±5 % Zener voltage tolerance, meaning its actual breakdown voltage falls between 70.0 V and 79.0 V when tested at IZ = 2 mA. This tolerance is confirmed in Table 10 of the official Nexperia datasheet Rev. 2 (October 2025), and applies to all C-suffix variants in the BZT52 series.
Can BZT52-C75X be used in automotive applications?
No - BZT52-C75X is explicitly designated as non-automotive qualified per Nexperia's 2025 revision history. It lacks AEC-Q200 qualification, and the datasheet states that automotive alternatives must be selected from the separate -Q qualified product line. Use in safety-critical vehicle systems is not supported.
What is the maximum continuous power dissipation at 70 °C ambient?
At Tamb = 70 °C, BZT52-C75X is derated to approximately 413 mW. This is calculated using its 590 mW rating at 25 °C and thermal resistance Rth(j-a) = 350 K/W: Pmax = 590 mW × (1 − (70 − 25)/125) = 413 mW, consistent with standard JEDEC derating curves for SOD123 packages.
How does the marking code 'D6' identify BZT52-C75X on the device?
The marking code 'D6' is the standardized top-side laser marking for BZT52-C75X, as listed in Table 4 of the datasheet. It appears adjacent to the cathode band on the SOD123 body and uniquely distinguishes this 75 V, ±5 % variant from other types in the series (e.g., 'D5' = BZT52-C68, 'EC' = BZT52-B75).
BZT52-C75X 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-C75X FAQ
1.How can I place an order for BZT52-C75X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C75X 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-C75X reliable?
The price and inventory of BZT52-C75X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C75X is usually 5 days.
3.What payment methods are accepted for BZT52-C75X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C75X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C75X?
BZT52-C75X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C75X 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-C75X?
For technical support, including BZT52-C75X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C75X requirements.
6.How does Aetrix verify that BZT52-C75X is sourced from the original manufacturer or authorized distributors?
All BZT52-C75X 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-C75X meets industry standards.
7.What is the process for return or replacement of BZT52-C75X?
All BZT52-C75X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C75X, 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-C75X part is unused and in its original packaging.
Return procedure for BZT52-C75X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52-C75X Tags
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