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Nexperia USA Inc. BZT52H-B6V8-QX
- Part No.:
- BZT52H-B6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,141
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Product details
Overview
BZT52H-B6V8-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 6.8 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-B6V8-QX datasheet, BZT52H-B6V8-QX pinout, BZT52H-B6V8-QX application, or BZT52H-B6V8-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance (8 Ω), temperature coefficient (+1.2 mV/K), and automotive-grade reliability context - all critical for precision biasing, overvoltage clamping, and ECU power rail stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode with a tightly controlled 6.8 V nominal Zener voltage at IZ = 5 mA, exhibiting low dynamic impedance (8 Ω) and a positive temperature coefficient of +1.2 mV/K - enabling stable voltage references across automotive ambient ranges (−65 °C to +150 °C).
Its SOD123F package delivers 150 K/W junction-to-solder-point thermal resistance and supports 250 mA forward current, while AEC-Q101 qualification confirms robustness against mechanical shock, temperature cycling, and humidity exposure required for under-hood electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.66 V to 6.94 V at IZ = 5 mA - defines precise clamping threshold for 12 V rail protection circuits |
| Differential Resistance (rdif) | 8 Ω max - ensures minimal output voltage shift under load variation in feedback networks |
| Reverse Current (IR) | 2 μA max at VR = 4.76 V - guarantees low leakage in high-impedance biasing paths |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - enables sustained operation in compact PCB layouts without forced cooling |
| Temperature Coefficient (SZ) | +1.2 mV/K at IZ = 5 mA - provides predictable, linear VZ drift for temperature-compensated references |
| Junction Temperature (Tj) | 150 °C maximum - supports continuous operation in engine control modules and body electronics |
| Package | SOD123F - surface-mount footprint with 1.0 mm height and 3.5 mm length, optimized for automated assembly and thermal pad attachment |
Pinout & Package
SOD123F is a 2-terminal surface-mount plastic package with cathode marked by a bar on the device body. Thermal performance relies on cathode-side solder pad area (1 cm² recommended) to achieve 70 K/W junction-to-pad thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; requires thermal pad for power handling |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HAST, and mechanical shock per discrete semiconductor standard |
| ±2 % VZ tolerance | Enables tighter system-level voltage margin control than ±5 % variants in safety-critical sensor interfaces |
| Low rdif (8 Ω) | Maintains regulation accuracy under dynamic load steps typical in microcontroller reset circuitry |
| 150 °C max Tj | Supports uninterrupted operation in proximity to power converters and motor drivers in ADAS ECUs |
| SOD123F footprint | Compatible with standard reflow profiles and IPC-7351B land patterns, reducing assembly risk in high-volume production |
Applications
| Automotive ECU Power Rail Clamping | Microcontroller Reset Circuit Reference |
|---|---|
Use Scenario: Protecting 5 V logic rails in engine control units from load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener clamping element placed between VCC and ground, conducting during overvoltage events to limit rail excursion. Use Value: 6.8 V breakdown with 8 Ω rdif holds rail within 7.2 V during 100 μs surges, preventing MCU brownout or latch-up. |
Use Scenario: Generating a stable reset threshold for ARM Cortex-M microcontrollers in telematics modules. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in RC-based reset generator. Use Value: +1.2 mV/K temperature coefficient and ±2 % VZ tolerance ensure reset assertion remains within 5.8–6.2 V across −40 °C to +125 °C. |
| Body Control Module Voltage Monitoring | Infotainment System Bias Supply |
Use Scenario: Monitoring 12 V battery voltage in door module controllers using resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Overvoltage limiter on divider output to protect ADC input from >16 V excursions. Use Value: 2 μA max reverse leakage at 4.76 V preserves divider accuracy; 830 mW rating handles sustained 13.5 V float charging conditions. |
Use Scenario: Providing reference voltage for audio amplifier biasing in head unit power management ICs. IC Role / Device Role / Timing Role: Stable DC reference source for analog front-end gain calibration circuitry. Use Value: Low 8 Ω dynamic impedance minimizes noise coupling into sensitive analog stages; SOD123F package allows placement near LDO outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C6V8-Q | ±5 % VZ tolerance (6.4–7.2 V), higher rdif (200 Ω), same SOD123F package | Acceptable where system-level voltage margins exceed ±3 % and thermal derating is less constrained | Select when cost sensitivity outweighs precision requirements in non-safety-critical lighting modules |
| MMSZ5234B-TP | 6.8 V nominal, ±5 %, 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Limited to consumer or industrial applications; unsuitable for automotive due to missing stress test validation | Choose only for prototyping or non-automotive designs where qualification documentation is not required |
Compared with BZT52H-B6V8-QX, the C-series variant trades precision and low impedance for cost, while MMSZ5234B-TP lacks automotive qualification and thermal capability - making the B-series the sole option meeting both AEC-Q101 and 830 mW/8 Ω design constraints.
Availability
BZT52H-B6V8-QX is available at Aetrix Electronics and suitable for automotive ECU power rail clamping, microcontroller reset circuit reference, and body control module voltage monitoring requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-B6V8-QX 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 essential efficiency technologies, delivering high-performance, reliable components for automotive, industrial, and mobile markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, reference, and transient suppression where precision, thermal stability, and qualification rigor are mandatory.
FAQ
What is the maximum reverse current at 4.76 V for BZT52H-B6V8-QX?
The maximum reverse current (IR) is 2 μA at VR = 4.76 V and Tj = 25 °C. This low leakage ensures minimal error in high-impedance voltage divider networks used for battery monitoring and sensor biasing in automotive systems.
Can BZT52H-B6V8-QX be used in place of a 6.2 V Zener diode?
No - its nominal Zener voltage is 6.8 V (range 6.66–6.94 V), not 6.2 V. Substituting it for a 6.2 V part would raise clamping thresholds by ~10 %, potentially exceeding safe operating limits of downstream ICs like CAN transceivers or ADC inputs.
What is the thermal resistance from junction to solder point?
Rth(j-sp) is 70 K/W when mounted with a 1 cm² cathode-side copper pad on FR4 PCB. This value enables accurate junction temperature estimation during thermal design of engine bay electronics operating at 85 °C ambient.
Does BZT52H-B6V8-QX support reflow soldering only?
Yes - the datasheet explicitly states reflow soldering is the only recommended method. Wave or hand soldering risks thermal damage due to the SOD123F package's sensitivity to localized heating and its AEC-Q101-qualified internal construction.
BZT52H-B6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±2.06%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B6V8-QX FAQ
1.How can I place an order for BZT52H-B6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B6V8-QX 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 BZT52H-B6V8-QX reliable?
The price and inventory of BZT52H-B6V8-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B6V8-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B6V8-QX?
BZT52H-B6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B6V8-QX 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 BZT52H-B6V8-QX?
For technical support, including BZT52H-B6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B6V8-QX requirements.
6.How does Aetrix verify that BZT52H-B6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B6V8-QX 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 BZT52H-B6V8-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B6V8-QX?
All BZT52H-B6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B6V8-QX, 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 BZT52H-B6V8-QX part is unused and in its original packaging.
Return procedure for BZT52H-B6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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