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Diodes Incorporated BZT52C30-7-F
- Part No.:
- BZT52C30-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C30-7-F.pdf
- Description:
- DIODE ZENER 30V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:124,904
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Product details
Overview
BZT52C30-7-F from Diodes Incorporated is a surface-mount 30 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±3.3% voltage tolerance (28.0–32.0 V), 80 Ω maximum Zener impedance at 2 mA test current, and 0.1 µA maximum reverse leakage at 24.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52C30-7-F datasheet, BZT52C30-7-F pinout, BZT52C30-7-F application, or BZT52C30-7-F equivalent, key selection criteria include its 30 V nominal Zener voltage, SOD123 footprint compatibility, AEC-Q101 qualification for automotive use, thermal resistance of 338 °C/W (Junction-to-Ambient), and 0.010 g weight for high-speed pick-and-place assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the matte tin–plated Alloy 42 leadframe guarantees solderability per MIL-STD-202, Method 208.
The device exhibits a negative temperature coefficient of −2.7 mV/°C near 30 V, enabling predictable drift compensation in temperature-sensitive references. Its 150 °C/W junction-to-lead thermal resistance supports localized heat extraction when mounted on copper pads, and moisture sensitivity level 1 allows unlimited floor life before reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, 28.0–32.0 V range at 2 mA - defines clamping threshold in protection circuits |
| Power Dissipation (PD) | 370 mW at +25°C ambient - sets max continuous DC power without heatsinking |
| Zener Impedance (ZZT) | 80 Ω max at IZT = 2 mA - determines regulation stiffness under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 24.4 V - ensures minimal quiescent current in standby bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - requires PCB copper area management to avoid >125°C junction temp at full power |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint compatible with standard 0805-class placement equipment |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Two-terminal device in SOD123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (band end); polarity must be observed for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; forms reference ground for shunt regulator topology |
| Cathode | Zener breakdown terminal / voltage clamp input | Connected to protected node; sinks current when voltage exceeds 30 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight Zener voltage distribution (±3.3%) and repeatable breakdown behavior across production lots |
| 500 mW power rating at +75°C lead temperature | Supports higher transient power handling than ambient-rated 370 mW, useful in pulse-clamp applications |
| Matte tin finish on Alloy 42 leadframe | Ensures robust solder wetting and intermetallic formation during reflow, reducing voiding risk |
| Moisture Sensitivity Level 1 | Eliminates bake requirement prior to assembly - reduces manufacturing cycle time and cost |
| Halogen- and antimony-free "Green" compound | Meets IPC-4101D/93 requirements for bromine & chlorine (<1500 ppm total), supporting eco-compliance programs |
Applications
| Automotive Sensor Biasing | Industrial Analog Input Protection |
|---|---|
Use Scenario: Providing stable 30 V reference for Hall-effect position sensor ICs in engine control modules. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias current into sensor front-end amplifier. Use Value: Maintains sensor linearity across −40°C to +125°C ambient by compensating for supply ripple with <80 Ω dynamic impedance. |
Use Scenario: Clamping 0–30 V analog input channels against ESD and load-dump transients in PLC analog I/O modules. IC Role / Device Role / Timing Role: Passive overvoltage protector placed before ADC input buffer stage. Use Value: Limits fault voltage to ≤32.0 V with <0.1 µA leakage at 24.4 V, preserving measurement accuracy during normal operation. |
| Consumer Power Supply Feedback | Medical Instrument Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters powering USB-C PD accessories. IC Role / Device Role / Timing Role: Zener-based feedback element for optocoupler-driven regulation loop. Use Value: Delivers ±3.3% voltage accuracy with 2 mA test current, enabling <±2% output regulation without trimming. |
Use Scenario: Precision voltage reference for 16-bit medical ECG front-end amplifiers requiring low-noise DC bias. IC Role / Device Role / Timing Role: Low-drift shunt reference stabilizing op-amp common-mode voltage. Use Value: −2.7 mV/°C tempco enables predictable offset correction; 0.010 g mass minimizes board flex-induced microphonics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5257ET1G (onsemi) | 30 V nominal, ±5% tolerance (28.5–31.5 V), 500 mW, SOD123, but no AEC-Q101 qualification | Lacks automotive qualification; suitable only for commercial-grade power supplies or consumer electronics | Select when AEC-Q101 compliance is not required and wider voltage tolerance is acceptable |
| BZX84-C30 (Nexperia) | 30 V nominal, ±5% tolerance (28.5–31.5 V), 350 mW, SOT23 - smaller footprint but lower power rating | Lower power handling limits use to sub-100 mW bias networks; SOT23 requires different stencil design | Select when board space is constrained and thermal load remains below 350 mW |
Compared with MMSZ5257ET1G and BZX84-C30, BZT52C30-7-F offers tighter voltage tolerance (±3.3% vs. ±5%), higher ambient-rated power (370 mW vs. 350 mW), and AEC-Q101 qualification - making it preferred for automotive sensor biasing and industrial analog protection where reliability and regulation precision are critical.
Availability
BZT52C30-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog input protection, and consumer power supply feedback requiring stable component supply, RoHS/Green compliance, and AEC-Q101 reliability assurance.
Supply support for BZT52C30-7-F 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 BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and overvoltage protection in cost-sensitive, high-volume applications including automotive, industrial, and consumer electronics.
FAQ
What is the maximum continuous reverse current this Zener can handle at 30 V?
The BZT52C30-7-F is not rated for continuous conduction at its Zener voltage. At VZ = 30 V, the maximum steady-state current is limited by power dissipation: IMAX = PD/VZ = 370 mW / 30 V ≈ 12.3 mA at +25°C ambient. Derating is required above +25°C per the 338 °C/W RθJA curve.
Does this part have a specified Zener knee current or minimum operating current?
Yes - the datasheet specifies a test current IZT of 2 mA for voltage characterization. The Zener begins regulating meaningfully above ~0.25 mA, but regulation accuracy degrades below 1 mA due to increased dynamic impedance; stable operation is recommended between 1 mA and 12 mA.
Can BZT52C30-7-F replace BZT52C33-7-F in a circuit designed for 33 V clamping?
No - BZT52C30-7-F has a nominal Zener voltage of 30 V (28.0–32.0 V), while BZT52C33-7-F is 33 V (31.0–35.0 V). Substituting introduces a 3 V lower clamping threshold, risking overvoltage damage to downstream components rated for 33 V operation.
Is the SOD123 package of this Zener compatible with automated optical inspection (AOI) systems?
Yes - the SOD123 package features a visible cathode band and standardized 2.65 mm × 1.55 mm outline with defined pad layout (X = 0.900 mm, Y = 0.950 mm), enabling reliable detection by AOI systems calibrated for JEDEC-standard discrete packages.
BZT52C30-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±7%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C30-7-F FAQ
1.How can I place an order for BZT52C30-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C30-7-F 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 BZT52C30-7-F reliable?
The price and inventory of BZT52C30-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C30-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C30-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C30-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C30-7-F?
BZT52C30-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C30-7-F 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 BZT52C30-7-F?
For technical support, including BZT52C30-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C30-7-F requirements.
6.How does Aetrix verify that BZT52C30-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C30-7-F 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 BZT52C30-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C30-7-F?
All BZT52C30-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C30-7-F, 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 BZT52C30-7-F part is unused and in its original packaging.
Return procedure for BZT52C30-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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