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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZT52-C68X

Name: BZT52-C68X
Brand: Nexperia USA Inc.
SKU: BZT52-C68X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52-C68X

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: BZT52-C68X.pdf

Description:: DIODE ZENER 68V 350MW SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:2,977

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Product details

Overview

BZT52-C68X from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 68 V nominal Zener voltage at I_Z = 2 mA, 400 Ω maximum differential resistance, and 590 mW total power dissipation at T_amb ≤ 25 °C; used for precision voltage reference and overvoltage clamping in low-power DC rails.

For engineers reviewing the BZT52-C68X datasheet, BZT52-C68X pinout, BZT52-C68X application, or BZT52-C68X equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_th(j-sp) = 55 K/W), reverse current at VR = 54.4 V (≤0.2 μA), temperature coefficient (±0.05 mV/K), and SOD123 footprint compatibility with automated SMT assembly.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 64.0–72.0 V range at I_Z = 2 mA, exhibiting low dynamic impedance (r_dif ≤ 400 Ω) and minimal temperature drift (SZ = ±0.05 mV/K). Its construction uses planar silicon technology optimized for stable regulation under transient surge conditions.

The device supports non-repetitive peak reverse power dissipation up to 40 W (t_p = 100 μs) and maintains junction temperature below 150 °C under rated ambient conditions. Thermal resistance from junction to solder point is 55 K/W, enabling reliable operation on standard FR4 PCBs with 1 cm² cathode pad.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener voltage V_Z	64.0–72.0 V at I_Z = 2 mA; defines precise clamping threshold for 68 V nominal rail protection
Differential resistance r_dif	≤ 400 Ω; ensures minimal output voltage shift under load current variation
Reverse current I_R	≤ 0.2 μA at V_R = 54.4 V; guarantees low leakage in standby regulation circuits
Total power dissipation P_tot	590 mW at T_amb ≤ 25 °C; sets maximum continuous DC power handling on standard PCB
Thermal resistance R_th(j-sp)	55 K/W; enables predictable junction temperature rise above solder point during operation
Non-repetitive peak I_ZSM	0.25 A at t_p = 100 μs; supports transient overvoltage suppression without failure
Junction temperature T_j	−55 to +150 °C; specifies full operational range for industrial ambient environments

Pinout & Package

SOD123 surface-mount plastic package with 2 leads; dimensions: 3.75 mm × 1.7 mm × 1.3 mm (L × W × H); cathode marked by band on body.

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; forms reverse-biased junction for Zener action

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective selection for non-automotive applications where tighter tolerance is not required
Low differential resistance (≤400 Ω)	Maintains stable regulation across varying load currents in feedback or reference paths
High surge capability (40 W, 100 μs)	Withstands ESD and line transients without degradation in clamp performance
SOD123 footprint compatibility	Supports high-density PCB layouts and standard reflow soldering processes per JEDEC MS-012
150 °C maximum junction temperature	Allows operation in extended-temperature industrial environments without derating

Applications

Power Supply Voltage Reference

Overvoltage Protection Clamp

Use Scenario: Providing stable 68 V reference for feedback divider in isolated DC-DC converters.

IC Role / Device Role / Timing Role: Zener diode acts as passive voltage reference element in secondary-side regulation loop.

Use Value: Tight V_Z tolerance and low r_dif minimize output voltage drift across line/load/temperature variations.

Use Scenario: Clamping induced surges on 60 V battery management system (BMS) signal lines.

IC Role / Device Role / Timing Role: Reverse-biased Zener shunts transient energy to ground before IC input damage occurs.

Use Value: 0.25 A non-repetitive peak current rating absorbs 100 μs transients while maintaining <1 % V_Z shift.

Low-Power Sensor Biasing

Industrial I/O Signal Level Shifting

Use Scenario: Generating stable bias voltage for high-impedance analog sensor interfaces operating near 68 V supply rails.

IC Role / Device Role / Timing Role: Zener provides low-noise, low-drift DC bias point independent of supply ripple.

Use Value: Temperature coefficient of ±0.05 mV/K ensures <0.35 % V_Z drift over −40 to +125 °C junction range.

Use Scenario: Level-shifting 0–5 V microcontroller outputs to interface with 68 V fieldbus receivers.

IC Role / Device Role / Timing Role: Zener limits high-side voltage swing to safe logic thresholds while blocking reverse current.

Use Value: Reverse leakage ≤0.2 μA at 54.4 V prevents loading of upstream digital drivers during idle states.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZT52-B68	±2 % V_Z tolerance (66.6–69.4 V), lower r_dif (150 Ω), same SOD123 package	Higher precision required in feedback loops where 1 % V_out stability is critical	Select when tighter voltage accuracy outweighs cost sensitivity
MMBZ5268BLT1G	±5 % V_Z, 64–72 V range, but rated for only 350 mW P_tot and higher r_dif (500 Ω)	Lower power density and reduced surge robustness limit use to non-transient-prone circuits	Choose only if legacy design reuse mandates ON Semiconductor footprint compatibility

Compared with BZT52-C68X, BZT52-B68 offers superior voltage accuracy and lower impedance for precision references, while MMBZ5268BLT1G trades power handling and surge immunity for multi-source availability-making BZT52-C68X optimal for cost-sensitive, medium-surge industrial clamping.

Availability

BZT52-C68X is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, and sensor interface circuits requiring stable component supply with consistent SOD123 packaging and traceable lot control.

Supply support for BZT52-C68X 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 with focus on efficiency, miniaturization, and automotive-grade reliability.

The BZT52 series targets general-purpose voltage regulation and clamping in consumer, industrial, and computing applications-designed for manufacturability, thermal robustness, and broad voltage coverage (2.4–75 V).

FAQ

What is the maximum continuous power dissipation for BZT52-C68X at 70 °C ambient?

At T_amb = 70 °C, derating applies linearly from 590 mW at 25 °C using R_th(j-a) = 350 K/W. Junction temperature must stay ≤150 °C, so allowable power is (150 − 70) °C ÷ 350 K/W = 229 mW. This value assumes free-air convection without heatsinking or enhanced copper.

Can BZT52-C68X be used in place of a 68 V Zener with ±2 % tolerance?

No-BZT52-C68X has ±5 % tolerance (64.0–72.0 V), whereas ±2 % parts like BZT52-B68 specify 66.6–69.4 V. Substitution may cause unacceptable output voltage error in precision feedback networks or violate safety margins in clamping designs.

What is the forward voltage drop at 10 mA forward current?

The forward voltage V_F is guaranteed ≤0.9 V at I_F = 10 mA per datasheet Table 1. This value reflects typical silicon diode behavior and is relevant for polarity-check circuits or series-connected protection configurations.

Is BZT52-C68X qualified for automotive applications?

No-this part belongs to the non-automotive "C" selection per Revision History (Section 13). Automotive-qualified equivalents (e.g., BZT52-C68-Q) require separate qualification per AEC-Q101 and are explicitly designated with "-Q" suffix in ordering codes.

BZT52-C68X 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):: 68 V

Tolerance:: ±5.9%

Power - Max:: 350 mW

Impedance (Max) (Zzt):: 160 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 47.6 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-C68X FAQ

1.How can I place an order for BZT52-C68X through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52-C68X 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-C68X reliable?

The price and inventory of BZT52-C68X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C68X is usually 5 days.

3.What payment methods are accepted for BZT52-C68X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C68X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52-C68X?

BZT52-C68X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52-C68X 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-C68X?

For technical support, including BZT52-C68X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C68X requirements.

6.How does Aetrix verify that BZT52-C68X is sourced from the original manufacturer or authorized distributors?

All BZT52-C68X 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-C68X meets industry standards.

7.What is the process for return or replacement of BZT52-C68X?

All BZT52-C68X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C68X, 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-C68X part is unused and in its original packaging.

Return procedure for BZT52-C68X:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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