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Nexperia USA Inc. BZT52H-A4V7-QX
- Part No.:
- BZT52H-A4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
BZT52H-A4V7-QX from Nexperia is a precision Zener voltage regulator diode in SOD123F package, rated for 4.7 V nominal breakdown voltage at 5 mA, ±1 % tolerance, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZT52H-A4V7-QX datasheet, BZT52H-A4V7-QX pinout, BZT52H-A4V7-QX application, or BZT52H-A4V7-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance, temperature coefficient, reverse current limits, and automotive-grade reliability context - all confirmed from Nexperia's official product data sheet Rev. 1 (2021).
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 4.7 V regulation across load and line variations. Its ±1 % tolerance and low 78 Ω typical differential resistance (rdif) at IZ = 5 mA ensure tight voltage control in feedback paths and reference nodes.
Designed for surface-mount automotive systems, it features AEC-Q101 qualification, junction temperature range of −65 °C to +150 °C, and thermal resistance from junction to solder point of 70 K/W - enabling reliable operation under high-temperature engine bay or ADAS module conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.65 V to 4.75 V at IZ = 5 mA - defines precise regulation threshold for voltage clamping or reference generation |
| Tolerance | ±1 % - enables high-accuracy biasing in analog sensor interfaces and ADC reference circuits |
| Differential Resistance (rdif) | 78 Ω max at IZ = 5 mA - determines output impedance and load regulation error under varying current |
| Temperature Coefficient (SZ) | −3.5 mV/K to +0.2 mV/K - quantifies VZ drift with temperature, critical for thermal stability in automotive environments |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - sets maximum continuous power handling in compact layouts |
| Reverse Current (IR) | 3 μA max at VR = 3.76 V - defines leakage level below breakdown, affecting standby power in always-on modules |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - relevant for polarity protection or series forward-path use cases |
Pinout & Package
Package: SOD123F - small-outline, flat-lead, surface-mount plastic package (3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height), optimized for automated assembly and space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse-bias configuration; marked by bar on device body |
| 2 | Anode (A) | Connected to lower-potential node (e.g., ground or return path); completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±1 % Zener voltage tolerance | Enables direct replacement of higher-cost precision references in non-critical feedback loops |
| 830 mW power rating | Supports robust transient suppression in 12 V/24 V vehicle electrical systems without derating at 25 °C |
| Low thermal resistance (Rth(j-sp) = 70 K/W) | Facilitates efficient heat transfer to PCB copper, reducing junction temperature rise during sustained regulation |
| SOD123F footprint compatibility | Matches industry-standard reflow soldering profiles and pick-and-place machine tooling |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 4.7 V reference for microcontroller ADC input scaling and sensor signal conditioning in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix reference potential independent of supply fluctuations. Use Value: ±1 % tolerance ensures <±50 mV absolute error in 4.7 V reference, meeting ASIL-B functional safety margin requirements for analog sensing. |
Use Scenario: Clamps 5 V USB-derived power rail against load dump transients in head unit power management. IC Role / Device Role / Timing Role: Shunt regulator absorbing surge energy above 4.7 V to protect downstream LDOs and PMICs. Use Value: 830 mW Ptot and 6.0 A non-repetitive peak reverse current (IZSM) enable single-device transient suppression without external TVS stacking. |
| ADAS Camera Module Bias | Body Control Module (BCM) Reset Circuit |
Use Scenario: Supplies regulated bias voltage to CMOS image sensor analog front-end in rear-view camera modules. IC Role / Device Role / Timing Role: Precision Zener reference stabilizing sensor VDDA rail against battery voltage ripple and ignition noise. Use Value: −3.5 to +0.2 mV/K temperature coefficient minimizes gain drift across −40 °C to +105 °C ambient range. |
Use Scenario: Generates clean reset threshold for microcontroller brown-out detection in door module controllers. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering POR/BOR circuit when main 12 V supply drops below 4.7 V. Use Value: 3 μA max IR at 3.76 V ensures negligible current draw in sleep mode, preserving battery life over extended parking periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B4V7-Q | ±2 % tolerance (vs. ±1 %), identical VZ range and package | Acceptable where tighter regulation not required; lower cost for non-safety-critical subsystems | Select when cost sensitivity outweighs need for <±50 mV reference accuracy |
| MMSZ4700T1G | ±5 % tolerance, SOD-123 package (not SOD123F), 500 mW Ptot | Limited to lower-power consumer or industrial applications; not AEC-Q101 qualified | Use only in non-automotive designs with relaxed thermal and reliability requirements |
Compared with BZT52H-A4V7-QX, the BZT52H-B4V7-Q trades 1 % accuracy for cost reduction while retaining AEC-Q101 compliance, whereas MMSZ4700T1G lacks automotive qualification and thermal performance - making the original part uniquely suited for precision, high-reliability automotive voltage references.
Availability
BZT52H-A4V7-QX is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, infotainment power clamping, and body control module reset circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-A4V7-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.
The BZT52H-Q series belongs to Nexperia's automotive Zener diode product line, engineered specifically for voltage reference, overvoltage protection, and biasing functions in harsh-environment vehicle electronics.
FAQ
What is the maximum reverse current (IR) specification for BZT52H-A4V7-QX at 3.76 V?
The maximum reverse current is 3 μA at VR = 3.76 V and Tj = 25 °C, measured under specified test conditions per Table 8 of the datasheet. This low leakage supports ultra-low-power operation in always-on automotive modules such as remote keyless entry receivers and CAN wake-up circuits.
Is BZT52H-A4V7-QX compatible with lead-free reflow soldering processes?
Yes - the SOD123F package is qualified for lead-free reflow soldering per J-STD-020, with peak temperature up to 260 °C. The recommended footprint (Fig. 12) and thermal profile ensure reliable joint formation without delamination or voiding in high-volume automotive PCB assembly.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
With SZ ranging from −3.5 mV/K to +0.2 mV/K, the Zener voltage shifts approximately −17.5 mV to +1 mV across a 5 K change. Over the full −40 °C to +125 °C junction range, total drift remains within ±60 mV - well within the ±1 % (±47 mV) initial tolerance band for most ECU reference applications.
Can BZT52H-A4V7-QX be used as a substitute for older BZT52C4V7 or BZX84-C4V7 parts?
No - BZT52H-A4V7-QX has tighter ±1 % tolerance, higher 830 mW power rating, and AEC-Q101 qualification, whereas BZT52C4V7 offers ±5 % tolerance and BZX84-C4V7 is SOT-23 packaged with 300 mW rating. Direct substitution requires validation of thermal, accuracy, and qualification requirements in the target design.
BZT52H-A4V7-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:
- ±1.06%
- 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-A4V7-QX FAQ
1.How can I place an order for BZT52H-A4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A4V7-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-A4V7-QX reliable?
The price and inventory of BZT52H-A4V7-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-A4V7-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A4V7-QX?
BZT52H-A4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A4V7-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-A4V7-QX?
For technical support, including BZT52H-A4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A4V7-QX requirements.
6.How does Aetrix verify that BZT52H-A4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A4V7-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-A4V7-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A4V7-QX?
All BZT52H-A4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A4V7-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-A4V7-QX part is unused and in its original packaging.
Return procedure for BZT52H-A4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A4V7-QX Tags
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