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Nexperia USA Inc. BZT52H-A4V7X
- Part No.:
- BZT52H-A4V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A4V7X.pdf
- Description:
- DIODE ZENER 4.7V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,482
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Product details
Overview
BZT52H-A4V7X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, designed for precision voltage regulation and reference applications at 4.7 V nominal breakdown voltage with 78 Ω typical differential resistance at IZ = 5 mA and 830 mW total power dissipation at Tamb ≤ 25 °C. It serves as a stable shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection clamps.
For engineers reviewing the BZT52H-A4V7X datasheet, BZT52H-A4V7X pinout, BZT52H-A4V7X application, or BZT52H-A4V7X equivalent, key selection considerations include its tight 4.7 V ±1 % tolerance, low 78 Ω dynamic impedance, thermal resistance of 150 K/W (junction-to-solder point), 3 μA reverse current at VR = 3.5 V, and compatibility with standard reflow soldering on FR4 PCBs.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its design targets low-noise, high-stability regulation in space-constrained SMD layouts, with specified performance at IZ = 5 mA and Tj = 25 °C.
The device exhibits a positive temperature coefficient of +0.2 mV/K at IZ = 5 mA, enabling predictable drift behavior in temperature-sensitive references. Its 300 pF capacitance at 1 MHz and 0 V bias supports stable operation in moderate-frequency feedback networks without introducing phase margin degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 4.65 V to 4.75 V at IZ = 5 mA - ensures precise 4.7 V regulation within ±1 % tolerance for accurate reference generation |
| Differential Resistance rdif | 78 Ω max at IZ = 5 mA - minimizes output voltage variation under load current changes in shunt regulation |
| Reverse Current IR | 3 μA max at VR = 3.5 V - guarantees low leakage in standby or high-impedance sensing nodes |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB footprints with adequate copper area |
| Thermal Resistance Rth(j-sp) | 150 K/W - enables reliable thermal coupling to cathode solder pad for junction temperature control up to 150 °C |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines conduction threshold during forward bias, relevant for polarity protection or dual-function circuits |
| Temperature Coefficient SZ | +0.2 mV/K at IZ = 5 mA - quantifies predictable voltage drift per degree Celsius for thermal compensation design |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline; dimensions 3.6 mm × 1.6 mm × 1.0 mm; cathode marked by bar on body; optimized for automated reflow assembly on FR4 PCBs with single-sided 1 cm² copper pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; carries reverse breakdown current; requires dedicated thermal pad for heat dissipation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt path during regulation; polarity must be observed to avoid forward conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % VZ tolerance | Enables high-accuracy voltage references without external trimming in ADC references or sensor excitation circuits |
| 830 mW power rating | Supports robust regulation in 5 V rail clamping and transient suppression where peak power exceeds 300 mW |
| Low 78 Ω dynamic impedance | Maintains <10 mV output deviation across ±1 mA load current shifts in feedback divider networks |
| SOD123F footprint | Reduces board area by 40 % vs. DO-35; compatible with standard 0805 reflow profiles and AOI inspection |
| 150 °C maximum junction temperature | Allows operation in industrial environments (−40 °C to +125 °C ambient) with derated power above 25 °C |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated DC-DC converters using optocoupler feedback loops. IC Role / Device Role / Timing Role: Provides precise 4.7 V reference to TL431 or similar shunt regulator ICs in secondary-side feedback networks. Use Value: Tight ±1 % tolerance ensures output accuracy within ±1.5 % over line/load/temperature, meeting Class II power supply standards. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced voltage spikes on 5 V interface lines. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp to divert transient energy before it reaches sensitive input structures. Use Value: 3 μA leakage at 3.5 V prevents signal distortion in high-impedance bus lines while clamping >4.7 V transients within nanoseconds. |
| ADC Voltage Reference Buffer | Current Source Biasing |
|
Use Scenario: Generating stable excitation voltage for resistive bridge sensors feeding 12-bit SAR ADCs. IC Role / Device Role / Timing Role: Supplies low-noise, temperature-compensated 4.7 V reference to op-amp buffer stages driving ADC reference inputs. Use Value: +0.2 mV/K tempco allows predictable calibration offset correction; 78 Ω impedance minimizes loading error on buffered reference. |
Use Scenario: Setting bias current for constant-current LED drivers in indicator circuits. IC Role / Device Role / Timing Role: Establishes fixed voltage drop across series resistor to define LED drive current independent of supply variation. Use Value: 830 mW rating supports 100 mA bias currents with 4.7 V headroom; SOD123F size fits dense LED array PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C4V7 | ±5 % tolerance, 95 Ω rdif, 3 μA IR at 3.5 V | Lower cost, wider VZ spread acceptable in non-critical biasing | Select when ±1 % accuracy is unnecessary and BOM cost reduction is prioritized |
| MMSZ4700T1G | ±5 % tolerance, 100 Ω rdif, 10 μA IR at 3.5 V, SOD-123 package | Higher leakage limits use in ultra-low-power sleep modes | Prefer only if existing design uses ON Semi footprint and tighter leakage is not required |
Compared with BZT52C4V7 and MMSZ4700T1G, the BZT52H-A4V7X delivers superior regulation accuracy and lower dynamic impedance-critical for precision references-while maintaining identical SOD123F mounting and thermal performance.
Availability
BZT52H-A4V7X is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp protection, and ADC voltage reference buffering requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BZT52H-A4V7X 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 and industrial-grade components.
The BZT52H series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and regulation in consumer, industrial, and computing applications where tight tolerance and thermal stability are essential.
FAQ
What is the maximum reverse current at 3.5 V for BZT52H-A4V7X?
The BZT52H-A4V7X specifies a maximum reverse current of 3 μA at VR = 3.5 V and Tj = 25 °C. This low leakage ensures minimal loading on high-impedance nodes such as op-amp inputs or ADC reference dividers, preserving signal integrity in precision analog circuits.
Can BZT52H-A4V7X be used in automotive applications?
No-BZT52H-A4V7X is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 7, January 2023). It lacks AEC-Q200 qualification and automotive-grade testing. For automotive use, Nexperia offers separate -Q qualified variants like BZT52H-A4V7X-Q, which undergo extended temperature cycling and humidity testing.
What is the recommended PCB layout for thermal performance?
For optimal thermal performance, mount BZT52H-A4V7X on an FR4 PCB with a 1 cm² tin-plated copper pad connected to the cathode terminal. Avoid thermal relief spokes; use solid copper pour tied directly to the cathode pad. This achieves the specified 150 K/W Rth(j-sp) and supports full 830 mW dissipation at Tamb ≤ 25 °C.
How does the +0.2 mV/K temperature coefficient affect circuit accuracy?
The +0.2 mV/K temperature coefficient means the Zener voltage increases by 0.2 mV per °C rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this results in a +20 mV shift (0.43 % of 4.7 V), which must be accounted for in high-accuracy references via calibration or compensation networks.
BZT52H-A4V7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A4V7X FAQ
1.How can I place an order for BZT52H-A4V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A4V7X 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-A4V7X reliable?
The price and inventory of BZT52H-A4V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A4V7X is usually 5 days.
3.What payment methods are accepted for BZT52H-A4V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A4V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A4V7X?
BZT52H-A4V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A4V7X 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-A4V7X?
For technical support, including BZT52H-A4V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A4V7X requirements.
6.How does Aetrix verify that BZT52H-A4V7X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A4V7X 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-A4V7X meets industry standards.
7.What is the process for return or replacement of BZT52H-A4V7X?
All BZT52H-A4V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A4V7X, 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-A4V7X part is unused and in its original packaging.
Return procedure for BZT52H-A4V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A4V7X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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