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Diodes Incorporated BZT52HC47WF-7
- Part No.:
- BZT52HC47WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC47WF-7.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
BZT52HC47WF-7 from Diodes Incorporated is a surface-mount 47 V Zener diode in SOD123F package, rated for 375 mW power dissipation on standard FR-4 PCB and 830 mW with enhanced thermal pad, with 90 Ω dynamic impedance at 2 mA, ±5% voltage tolerance (44–50 V), and 0.05 µA reverse leakage at 32.9 V. It provides precision voltage regulation in low-power analog monitoring circuits.
For engineers reviewing the BZT52HC47WF-7 datasheet, BZT52HC47WF-7 pinout, BZT52HC47WF-7 application, or BZT52HC47WF-7 equivalent, key selection criteria include Zener voltage accuracy, thermal derating behavior, cathode-band polarity marking, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 47 V nominal Zener voltage is specified at 2 mA test current, with a positive temperature coefficient of +42.0 mV/°C - enabling predictable drift compensation in bias networks.
The device uses a planar silicon junction with cathode-band polarity identification and is optimized for low-profile mounting. Its SOD123F package supports automated placement and offers 150 °C/W thermal resistance when mounted with a 1 cm² cathode pad, enabling reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0–50.0 V at IZ = 2 mA - defines usable regulation range for overvoltage clamping or reference generation |
| Zener Impedance (ZZT) | 90 Ω at IZ = 2 mA - determines output voltage stability under small-signal current variation |
| Power Dissipation (PD) | 375 mW (FR-4, min pad) / 830 mW (1 cm² cathode pad) - sets maximum continuous operating power before thermal shutdown |
| Reverse Leakage (IR) | 0.05 µA at VR = 32.9 V - ensures minimal quiescent current in high-impedance bias networks |
| Temperature Coefficient (TC) | +42.0 mV/°C at IZ = 2 mA - quantifies voltage drift per degree, critical for temperature-compensated references |
| Capacitance (CT) | 40 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering and transient response in clamp circuits |
| Package | SOD123F (Type B), 0.015 g weight - enables compact, automated assembly with 1.80 mm width and 3.50 mm length |
Pinout & Package
SOD123F (Type B) is a flat-lead, surface-mount plastic package with cathode band marking on the top surface. The device has two terminals: anode and cathode, with polarity identified by a visible cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries forward current up to 250 mA |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node during regulation; heat-sinking pad area must be maximized for 830 mW operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring high-reliability discrete components |
| Green compound (halogen/antimony-free) | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports RoHS compliance and end-of-life recycling requirements |
| Low-profile SOD123F package | Height ≤ 1.15 mm - enables use in space-constrained consumer and industrial PCBs without compromising thermal performance |
| Matte tin annealed terminals | Solderable per MIL-STD-202, Method 208 - ensures robust reflow joint integrity and long-term intermetallic stability |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Clamp |
|---|---|
Use Scenario: Providing stable bias voltage to analog sensor front-ends in engine control modules under wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage protection element in 12 V/24 V vehicle electrical systems. Use Value: Maintains ±5% regulation across −40°C to +125°C ambient, leveraging +42.0 mV/°C TC for predictable drift alignment with op-amp offset compensation. |
Use Scenario: Clamping transient spikes on 48 V DC bus lines in programmable logic controller (PLC) power inputs. IC Role / Device Role / Timing Role: Fast-response overvoltage suppressor placed directly at connector entry point. Use Value: Limits surge energy with 44–50 V breakdown window and 90 Ω impedance, preventing latch-up in downstream DC-DC converters. |
| Medical Instrument Reference | IoT Edge Node Protection |
Use Scenario: Generating calibrated reference for 16-bit ADC in portable patient monitors where supply rail noise must be minimized. IC Role / Device Role / Timing Role: Low-noise, low-leakage shunt reference replacing larger TO-92 devices. Use Value: Delivers 0.05 µA reverse leakage at 32.9 V, reducing error contribution in high-impedance divider networks feeding precision amplifiers. |
Use Scenario: Protecting battery management ICs in wireless sensor nodes against ESD events during field deployment. IC Role / Device Role / Timing Role: Primary ESD clamp on VDD rail prior to LDO input. Use Value: Withstands 830 mW peak pulse power via optimized cathode pad layout, meeting IEC 61000-4-2 Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5270B-7-F | 47 V nominal, 500 mW PD, SOT-23 package, 100 Ω ZZT at 20 mA | Higher power rating but larger footprint and different thermal profile; requires different PCB layout | Preferred for higher-current regulation where SOT-23 placement is already standardized |
| BZX84-C47 | 47 V nominal, 300 mW PD, SOT-23 package, 90 Ω ZZT at 5 mA, no AEC-Q101 qualification | Lacks automotive qualification and has tighter thermal constraints due to lower power rating | Suitable for cost-sensitive commercial applications where AEC-Q101 is not required |
Compared with MMBZ5270B-7-F and BZX84-C47, BZT52HC47WF-7 delivers superior thermal performance in compact form factor, AEC-Q101 validation for automotive use, and tighter voltage tolerance at lower test current - making it optimal for space-constrained, high-reliability designs requiring precise 47 V clamping.
Availability
BZT52HC47WF-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply clamping, and medical instrument reference circuits requiring stable component supply and full traceability.
Supply support for BZT52HC47WF-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, energy-efficient components for automotive, industrial, and computing markets.
The BZT52HC series was designed specifically for AEC-Q101-compliant, surface-mount Zener regulation in space-constrained automotive and industrial environments - emphasizing thermal robustness, green materials, and tight voltage tolerances.
FAQ
What is the maximum continuous reverse voltage this Zener can regulate at?
The BZT52HC47WF-7 regulates continuously within its specified Zener voltage range of 44.0–50.0 V at 2 mA test current. It is not rated for sustained operation above 50.0 V in reverse bias; exceeding this risks irreversible breakdown or parametric shift. Derating is required above +75°C ambient per the power curve in Figure 1.
Does this part support lead-free reflow soldering?
Yes - the device features matte tin annealed terminals over copper alloy leadframe and is qualified for standard Pb-free reflow profiles per JEDEC J-STD-020. Its moisture sensitivity level is rated at Level 1, eliminating bake requirements prior to assembly.
How does the +42.0 mV/°C temperature coefficient affect circuit design?
This positive TC means the Zener voltage increases linearly with junction temperature. In precision references, it must be compensated using negative-TC components (e.g., forward-biased diodes) or calibrated in software. In clamping applications, it ensures predictable voltage rise during thermal stress, avoiding premature triggering.
Can this Zener replace older BZT52C47 parts in existing designs?
Yes - BZT52HC47WF-7 is a direct functional replacement for BZT52C47 with identical Zener voltage, improved thermal performance (830 mW vs. 500 mW), AEC-Q101 qualification, and green packaging. No layout changes are needed, though thermal pad optimization yields full power benefit.
BZT52HC47WF-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):
- 47 V
- Tolerance:
- ±6.38%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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
BZT52HC47WF-7 FAQ
1.How can I place an order for BZT52HC47WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC47WF-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 BZT52HC47WF-7 reliable?
The price and inventory of BZT52HC47WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC47WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC47WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC47WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC47WF-7?
BZT52HC47WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC47WF-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 BZT52HC47WF-7?
For technical support, including BZT52HC47WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC47WF-7 requirements.
6.How does Aetrix verify that BZT52HC47WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC47WF-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 BZT52HC47WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC47WF-7?
All BZT52HC47WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC47WF-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 BZT52HC47WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC47WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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