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Diodes Incorporated BZT52HC4V3WF-7
- Part No.:
- BZT52HC4V3WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC4V3WF-7.pdf
- Description:
- DIODE ZENER 4.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,787
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Product details
Overview
BZT52HC4V3WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 4.3 V zener voltage (4.0–4.6 V range), 5 mA test current, and 95 Ω maximum zener impedance at IZT. It delivers stable voltage regulation in low-power biasing and reference circuits, operating within −65 °C to +150 °C and rated for 375 mW power dissipation on standard FR-4 PCB.
For engineers reviewing the BZT52HC4V3WF-7 datasheet, BZT52HC4V3WF-7 pinout, BZT52HC4V3WF-7 application, or BZT52HC4V3WF-7 equivalent, key selection criteria include its SOD123F package footprint, cathode-band polarity marking, AEC-Q101 qualification for automotive reliability, and tight 4.3 V ±0.3 V regulation tolerance at 5 mA.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its −3.5 to 0.0 mV/°C temperature coefficient ensures minimal drift across industrial temperature ranges, and its 450 pF capacitance at 1 MHz supports use in low-frequency regulation without signal coupling concerns.
The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, enabling reliable solderability per MIL-STD-202 Method 208. Its SOD123F (Type B) package provides low-profile mounting and thermal resistance of 330 °C/W on minimum pad layout or 150 °C/W with 1 cm² cathode pad - critical for thermal management in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0–4.6 V at 5 mA - defines precise regulation window for 3.3 V or 5 V rail monitoring and clamping |
| Zener Impedance (ZZT) | ≤95 Ω at 5 mA - ensures low dynamic resistance for stable output under small-signal load variation |
| Power Dissipation (PD) | 375 mW (FR-4, min pad) - sets max continuous DC power handling in standard PCB layouts |
| Reverse Current (IR) | ≤3 µA at 1 V - guarantees high off-state impedance for low-leakage bias networks |
| Capacitance (CT) | 450 pF at 1 MHz, 0 V - limits high-frequency noise coupling in analog reference paths |
| Temp Coefficient (TC) | −3.5 to 0.0 mV/°C - enables predictable voltage shift over −65 °C to +150 °C operation |
| Forward Voltage (VF) | 0.9 V at 10 mA - confirms low-loss conduction when used in dual-direction protection schemes |
Pinout & Package
Package: SOD123F (Type B), surface-mount, flat-lead, cathode-band marked. Dimensions: 1.80 mm × 2.70 mm × 1.15 mm (L × W × H), weight ≈ 0.015 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener mode | Provides current entry path during forward conduction; referenced to cathode for breakdown threshold |
| Cathode | Negative terminal in forward bias; higher-potential node in Zener regulation | Marked by band; connects to regulated voltage node; determines polarity of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| SOD123F low-profile package | 1.15 mm height enables use in ultra-thin consumer and portable electronics assemblies |
| Halogen- and antimony-free "Green" compound | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with global environmental directives |
| Matte tin–annealed leadframe | Ensures consistent solder wetting and intermetallic formation per MIL-STD-202 Method 208 |
Applications
| Power Supply Monitoring | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring 5 V supply rail for brown-out detection before system reset. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage threshold detector feeding comparator input. Use Value: Tight 4.3 V ±0.3 V tolerance ensures accurate trip point without external trimming resistors. |
Use Scenario: Generating clean, temperature-stable reset signal for ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Provides stable reference voltage to RC-based reset generator IC. Use Value: −3.5 to 0.0 mV/°C TC minimizes reset threshold drift across −40 °C to +85 °C ambient. |
| ESD Protection Clamp | ADC Reference Stabilization |
Use Scenario: Protecting I²C bus lines against transient overvoltage events. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) Zener clamps fast transients while preserving signal integrity. Use Value: 3 µA leakage at 1 V prevents DC loading of high-impedance bus lines during normal operation. |
Use Scenario: Stabilizing internal reference for 12-bit SAR ADC in sensor interface module. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift bias to ADC reference divider network. Use Value: 95 Ω dynamic impedance maintains reference stability under varying ADC sampling current demand. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5229BS-7-F | 4.3 V nominal, 100 Ω ZZT, SOT-23 package, 350 mW PD | Higher thermal resistance (400 °C/W), smaller footprint but lower power margin | Preferred where board space is constrained and peak power <300 mW |
| BZX84-C4V3-7-F | 4.3 V nominal, 90 Ω ZZT, SOT-23, AEC-Q101, 300 mW PD | Lower power rating and slightly tighter ZZT, same temp coefficient | Selected when cost sensitivity outweighs need for 375 mW headroom |
Compared with MMBZ5229BS-7-F and BZX84-C4V3-7-F, BZT52HC4V3WF-7 offers superior thermal performance (330 °C/W vs ≥400 °C/W) and higher power capability - critical for sustained regulation in thermally dense automotive modules.
Availability
BZT52HC4V3WF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and consumer power management systems requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52HC4V3WF-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT52HC series targets automotive-grade voltage regulation and protection, designed specifically to meet AEC-Q101 stress testing requirements while maintaining tight parametric tolerances in compact SOD123F packaging.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZT52HC4V3WF-7 has a nominal Zener voltage of 4.3 V with a guaranteed range of 4.0–4.6 V at 5 mA test current. Breakdown occurs within this range under specified test conditions; it is not rated for sustained operation above 4.6 V in regulation mode. Absolute maximum reverse voltage is not defined separately - operation beyond VZ max risks thermal runaway if power dissipation exceeds 375 mW.
Is this part suitable for use in automotive infotainment systems?
Yes - BZT52HC4V3WF-7 is AEC-Q101 qualified and rated for −65 °C to +150 °C operation, making it suitable for automotive infotainment power rails, microcontroller reset circuits, and I/O line protection. Its halogen-free, RoHS-compliant construction meets Tier 1 supplier material requirements, and its SOD123F package supports automated reflow assembly.
How does the SOD123F package compare thermally to SOD-123?
The SOD123F (Type B) package features an enhanced thermal pad design versus legacy SOD-123. With a 1 cm² cathode pad, its thermal resistance drops to 150 °C/W - 55% lower than standard SOD-123's typical 330 °C/W. This allows 2.2× higher continuous power handling (830 mW vs 375 mW) under optimized PCB layout, critical for automotive under-hood applications.
Can this Zener be used in bidirectional TVS configurations?
No - BZT52HC4V3WF-7 is a unidirectional Zener diode with cathode-band polarity. It conducts only in reverse breakdown (Zener mode) and forward conduction (0.9 V @ 10 mA). For bidirectional transient suppression, two devices must be connected anode-to-anode or a dedicated bidirectional TVS (e.g., SMBJ4.3CA) is required - this part lacks symmetrical breakdown characteristics.
BZT52HC4V3WF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±6.98%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC4V3WF-7 FAQ
1.How can I place an order for BZT52HC4V3WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC4V3WF-7 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 BZT52HC4V3WF-7 reliable?
The price and inventory of BZT52HC4V3WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC4V3WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC4V3WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC4V3WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC4V3WF-7?
BZT52HC4V3WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC4V3WF-7 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 BZT52HC4V3WF-7?
For technical support, including BZT52HC4V3WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC4V3WF-7 requirements.
6.How does Aetrix verify that BZT52HC4V3WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC4V3WF-7 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 BZT52HC4V3WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC4V3WF-7?
All BZT52HC4V3WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC4V3WF-7, 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 BZT52HC4V3WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC4V3WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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