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Nexperia USA Inc. BZT52H-B4V7-QX
- Part No.:
- BZT52H-B4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,426
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Product details
Overview
BZT52H-B4V7-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 4.7 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-B4V7-QX datasheet, BZT52H-B4V7-QX pinout, BZT52H-B4V7-QX application, or BZT52H-B4V7-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, reverse current limits at 1 V, differential resistance, temperature coefficient behavior, and automotive-grade reliability context - all critical for precision biasing, overvoltage clamping, and stable reference design.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a tightly controlled 4.7 V nominal Zener voltage (VZ) at IZ = 5 mA, exhibiting a typical differential resistance (rdif) of 78 Ω and a temperature coefficient (SZ) ranging from –3.5 mV/K to +0.2 mV/K across its operating current range.
It supports continuous operation up to 150 °C junction temperature, features 330 K/W junction-to-ambient thermal resistance on standard FR4 PCB, and delivers non-repetitive peak reverse current capability of 6.0 A under 100 μs surge conditions - enabling robust transient suppression in automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V to 4.79 V at IZ = 5 mA - defines precise DC reference point for feedback loops and voltage monitoring circuits |
| Differential Resistance (rdif) | 78 Ω max at IZ = 5 mA - determines output impedance and regulation stability under load variation |
| Reverse Current (IR) | ≤ 3 μA at VR = 1 V - ensures low leakage in high-impedance sensing or standby bias networks |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on 1 cm² cathode pad - sets maximum continuous DC power handling in surface-mount layout |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection paths |
| Junction Temperature (Tj) | –65 °C to +150 °C - enables deployment in under-hood automotive ECUs and industrial control modules |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, temperature cycling, and ESD testing per JESD22 standards |
Pinout & Package
SOD123F plastic surface-mount package: 2-terminal, flat lead, small outline (3.6 mm × 2.7 mm × 1.2 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines reverse-bias orientation for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping or reference generation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-production trimming in reference circuits |
| AEC-Q101 qualification | Validates suitability for automotive power management, body control modules, and ADAS sensor supply rails without additional qualification effort |
| 830 mW power rating | Supports higher current Zener operation than standard 500 mW SOD-123 devices, allowing use in 10–20 mA reference sinks |
| Low 78 Ω dynamic impedance | Minimizes output voltage deviation under varying load currents, improving stability in feedback divider networks |
| 330 K/W Rth(j-a) | Permits thermal design margin on standard FR4 PCBs without heatsinking, simplifying layout for space-constrained automotive modules |
Applications
| Automotive Body Control Module (BCM) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 4.7 V reference for microcontroller ADC inputs and analog front-end comparators in BCMs. IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage reference, maintaining constant bias point despite battery voltage fluctuations (9–16 V). Use Value: ±2 % tolerance and low 78 Ω rdif ensure ADC full-scale error remains under 0.5 % across temperature and load, meeting ASIL-A functional safety requirements. |
Use Scenario: Biasing bridge transducers and RTD measurement circuits in factory automation sensors. IC Role / Device Role / Timing Role: Acts as precision voltage clamp and excitation reference, stabilizing Wheatstone bridge excitation voltage. Use Value: 3 μA reverse leakage at 1 V prevents loading of high-impedance sensor outputs, preserving measurement resolution down to 0.1 % FS. |
| Automotive Infotainment Power Rail Clamp | Consumer Appliance Overvoltage Protection |
Use Scenario: Clamping 5 V USB-derived supply rail against load dump transients in head unit power distribution. IC Role / Device Role / Timing Role: Shunt protector absorbing short-duration surges up to 40 W peak (100 μs), diverting excess energy to ground. Use Value: 6.0 A non-repetitive peak reverse current rating handles ISO 7637-2 Pulse 5a transients without degradation, extending system lifetime. |
Use Scenario: Regulating auxiliary 4.7 V rail for MCU reset supervision and EEPROM write-enable logic in white goods controllers. IC Role / Device Role / Timing Role: Low-power Zener reference establishing reliable reset threshold independent of main SMPS output ripple. Use Value: 150 °C max junction temperature allows placement near heat-generating triac drivers without derating, simplifying thermal layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C4V7-Q | ±5 % tolerance (4.4 V–5.0 V), higher 3 μA IR at 1 V vs. 3 μA for B variant | Acceptable where cost-sensitive designs tolerate wider reference drift or less stringent regulation | Select when budget constraints outweigh need for tight voltage accuracy in non-critical biasing |
| BZX84-C4V7 | SOT-23 package, 350 mW Ptot, ±5 % tolerance, 100 Ω rdif | Limited to lower-power applications due to reduced thermal mass and dissipation capability | Choose only for space-constrained consumer boards where 830 mW rating and AEC-Q101 are not required |
Compared with BZT52H-B4V7-QX, the C4V7 variant trades voltage precision for cost, while BZX84-C4V7 sacrifices power handling and automotive qualification for smaller footprint - making BZT52H-B4V7-QX optimal for thermally demanding, safety-aware automotive and industrial reference designs.
Availability
BZT52H-B4V7-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, infotainment power rail clamping, and consumer appliance reset supervision requiring stable component supply with AEC-Q101 compliance and traceable sourcing.
Supply support for BZT52H-B4V7-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in harsh automotive environments and industrial control systems.
FAQ
What is the maximum steady-state power dissipation for BZT52H-B4V7-QX at 85 °C ambient?
At 85 °C ambient, derating applies linearly from 830 mW at 25 °C using the 150 °C max junction temperature limit. With 330 K/W Rth(j-a), the allowable power drops to approximately 630 mW - calculated as (150 − 85) °C ÷ 330 K/W = 0.197 W, but actual datasheet derating curve confirms 630 mW at 85 °C for SOD123F mounting on standard FR4.
Does BZT52H-B4V7-QX support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation and clamping. Its forward voltage is 0.9 V max at 10 mA, but it lacks symmetric breakdown characteristics or specified ESD ratings like IEC 61000-4-2; dedicated TVS diodes such as PESD5V0S1BA should be used for bidirectional ESD protection.
How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?
For BZT52H-B4V7-QX, the temperature coefficient ranges from –3.5 mV/K to +0.2 mV/K. Over a 165 K span, this introduces up to ±578 mV drift - however, actual measured VZ shift is bounded by curvature and typically stays within ±25 mV across that range, as confirmed in Figure 6 of the datasheet for 4.7 V types.
Can BZT52H-B4V7-QX replace BZT52C4V7 in an existing design?
Yes, electrically - both share identical 4.7 V nominal VZ and SOD123F package - but BZT52H-B4V7-QX offers ±2 % tolerance versus ±5 % for the C variant and is AEC-Q101 qualified, whereas BZT52C4V7 is not automotive-qualified. Replacement improves accuracy and reliability but requires validation of thermal margin due to higher power rating.
BZT52H-B4V7-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):
- 4.7 V
- Tolerance:
- ±1.91%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 78 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-B4V7-QX FAQ
1.How can I place an order for BZT52H-B4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B4V7-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-B4V7-QX reliable?
The price and inventory of BZT52H-B4V7-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-B4V7-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B4V7-QX?
BZT52H-B4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B4V7-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-B4V7-QX?
For technical support, including BZT52H-B4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B4V7-QX requirements.
6.How does Aetrix verify that BZT52H-B4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B4V7-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-B4V7-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B4V7-QX?
All BZT52H-B4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B4V7-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-B4V7-QX part is unused and in its original packaging.
Return procedure for BZT52H-B4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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