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Diodes Incorporated BZT52HC30WF-7
- Part No.:
- BZT52HC30WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC30WF-7.pdf
- Description:
- DIODE ZENER 30V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,214
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Product details
Overview
BZT52HC30WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 30 V (28.0–32.0 V range at 2 mA), 40 Ω dynamic impedance at 2 mA, ±0.05 µA maximum reverse leakage at 21.0 V, and 375 mW power dissipation on standard FR-4 PCB. It operates from −65 °C to +150 °C and is AEC-Q101 qualified for automotive electronics.
For engineers reviewing the BZT52HC30WF-7 datasheet, BZT52HC30WF-7 pinout, BZT52HC30WF-7 application, or BZT52HC30WF-7 equivalent, this device serves as a precision voltage reference and overvoltage clamp in low-power analog monitoring, ECU power rail regulation, and sensor signal conditioning circuits where stable 30 V breakdown and low temperature coefficient are required.
Technical Context
This Zener diode uses silicon planar construction with cathode-band polarity marking and is optimized for stable reverse-bias operation at 2 mA test current. Its thermal resistance is 330 °C/W on minimal pad layout and improves to 150 °C/W with 1 cm² cathode pad, enabling predictable derating up to 125 °C ambient.
The device exhibits a positive temperature coefficient of +24.4 mV/°C at 2 mA, supporting predictable voltage drift in temperature-varying environments. Total capacitance is limited to 50 pF at 1 MHz and 0 V bias, making it suitable for DC and low-frequency stabilization-not RF bypass.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 28.0–32.0 V at 2 mA - defines clamping threshold for 30 V nominal rail protection |
| Zener Impedance | 40 Ω at 2 mA - ensures <±0.8 V deviation under ±80 mA load step |
| Reverse Leakage | 0.05 µA max at 21.0 V - guarantees negligible standby current in battery-backed circuits |
| Power Dissipation | 375 mW on standard FR-4 - supports continuous 12.5 mA clamp current at 30 V |
| Operating Temp | −65 °C to +150 °C - validated for under-hood automotive and industrial control environments |
| Temp Coefficient | +24.4 mV/°C at 2 mA - enables predictable +2.44 V rise across 100 °C span |
| Package | SOD123F (Type B) - 1.8 mm × 2.7 mm footprint with 0.35–0.85 mm height for high-density layouts |
Pinout & Package
SOD123F (Type B) package: flat lead, molded green plastic case (UL 94V-0), cathode band marking on top surface. Terminals are matte tin annealed over copper alloy; polarity confirmed by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail during clamping |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to protected node; voltage develops across cathode-to-anode when reverse biased ≥28 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD HBM ≥2 kV |
| Green compound packaging | Halogen- and antimony-free molding (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meeting RoHS 2 and JEDEC MSL Level 1 |
| Low-profile SOD123F | Height ≤0.85 mm enables use in space-constrained modules such as ADAS camera ECUs and motor control sensors |
| Stable 30 V reference | 2 mA test current and tight 28.0–32.0 V tolerance support accurate voltage supervision in 24 V systems |
Applications
| Automotive ECU Power Supervision | Industrial Sensor Signal Clamping |
|---|---|
Use Scenario: Monitoring 24 V supply rail in engine control units for undervoltage/overvoltage fault detection. IC Role / Device Role / Timing Role: Zener reference for comparator input or ADC reference divider network. Use Value: 30 V breakdown provides 25 % headroom above nominal 24 V rail, ensuring reliable trip margin despite line transients. |
Use Scenario: Protecting analog front-end inputs of pressure or temperature sensors exposed to ESD or load dump. IC Role / Device Role / Timing Role: Low-leakage shunt clamp limiting input voltage to 32 V maximum. Use Value: 0.05 µA leakage at 21 V preserves sensor offset accuracy; 40 Ω Zzt maintains clamping stability under fast 100 ns transients. |
| Low-Power Battery Backup Reference | Programmable Logic Supply Clamp |
Use Scenario: Providing stable reference for RTC or memory retention circuitry in 3.3 V/5 V systems powered by coin cell or supercapacitor. IC Role / Device Role / Timing Role: Precision voltage reference in series with resistor to generate bias for supervisory ICs. Use Value: +24.4 mV/°C TC allows predictable calibration offset compensation across −40 °C to +85 °C operating range. |
Use Scenario: Preventing FPGA or CPLD I/O damage during hot-swap or power sequencing events in programmable logic boards. IC Role / Device Role / Timing Role: Standby-mode overvoltage protector on 3.3 V or 5 V I/O banks. Use Value: SOD123F footprint enables placement adjacent to connectors; 375 mW rating sustains 100 ms surge without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5261ET1G | 30 V nominal (28.5–31.5 V), 30 Ω Zzt at 20 mA, 500 mW Pd, SOD-123 package | Higher test current shifts operating point; higher power rating suits higher-energy transients | Select when >100 mA transient energy must be absorbed without voltage overshoot |
| BZX84-C30 | 30 V nominal (28.5–31.5 V), 50 Ω Zzt at 5 mA, 300 mW Pd, SOT-23 package | Larger Zzt and lower Pd reduce clamping precision and surge capacity; SOT-23 offers different layout compatibility | Choose only if SOT-23 footprint is mandatory and 300 mW derating suffices for target surge profile |
Compared with MMSZ5261ET1G and BZX84-C30, BZT52HC30WF-7 delivers tighter voltage tolerance at low test current, superior thermal performance on minimal pads, and AEC-Q101 validation-making it optimal for automotive-grade 30 V reference and clamp functions where reliability and predictability are prioritized over raw surge capacity.
Availability
BZT52HC30WF-7 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and low-power backup reference circuits requiring stable component supply, consistent parametric performance, and long-term lifecycle continuity.
Supply support for BZT52HC30WF-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT52HC series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial voltage regulation, reference, and transient suppression where high reliability, tight tolerances, and green compliance are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT52HC30WF-7?
The guaranteed breakdown occurs between 28.0 V and 32.0 V at 2 mA test current, per DS36891 Rev. 4–2. Below 28.0 V, reverse leakage remains ≤0.05 µA at 21.0 V. The device does not conduct significantly until reaching the lower limit of its specified zener voltage range.
Can BZT52HC30WF-7 be used in place of a 30 V Zener in an existing SOD-123 design?
Yes-BZT52HC30WF-7 uses the SOD123F (Type B) package, which is mechanically compatible with standard SOD-123 footprints. Its cathode band orientation and pad dimensions (1.80 mm × 2.70 mm) match industry-standard land patterns, enabling drop-in replacement without layout modification.
How does the +24.4 mV/°C temperature coefficient affect circuit accuracy?
At 2 mA, the zener voltage increases by +24.4 mV per °C rise. Over a 100 °C range (−40 °C to +60 °C), this yields +2.44 V total drift. Designers compensate using resistor-divider scaling or select it intentionally for temperature-compensated references in analog sensor interfaces.
Is BZT52HC30WF-7 suitable for protecting USB or CAN bus lines?
No-it is not rated for high-speed data line protection. With 50 pF capacitance and no specified ESD rating beyond AEC-Q101's HBM ≥2 kV, it lacks the low capacitance (<2 pF) and fast response needed for USB 2.0 or CAN FD signal integrity. Use dedicated TVS arrays like D3V3M1U2UP for those applications.
BZT52HC30WF-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):
- 30 V
- Tolerance:
- ±6.67%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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
BZT52HC30WF-7 FAQ
1.How can I place an order for BZT52HC30WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC30WF-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 BZT52HC30WF-7 reliable?
The price and inventory of BZT52HC30WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC30WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC30WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC30WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC30WF-7?
BZT52HC30WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC30WF-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 BZT52HC30WF-7?
For technical support, including BZT52HC30WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC30WF-7 requirements.
6.How does Aetrix verify that BZT52HC30WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC30WF-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 BZT52HC30WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC30WF-7?
All BZT52HC30WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC30WF-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 BZT52HC30WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC30WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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