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Diodes Incorporated BZT52C9V1-7
- Part No.:
- BZT52C9V1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C9V1-7.pdf
- Description:
- DIODE ZENER 9.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,931
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Product details
Overview
BZT52C9V1-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 9.1 V, ±5.5% tolerance (8.5–9.6 V), 500 mW power dissipation at TL = +75°C, 15 Ω maximum zener impedance at 5 mA test current, and 0.5 µA maximum reverse leakage at 7.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail regulation circuits.
For engineers reviewing the BZT52C9V1-7 datasheet, BZT52C9V1-7 pinout, BZT52C9V1-7 application, or BZT52C9V1-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (RθJA = 338 °C/W), SOD123 package compatibility with automated assembly, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under controlled current conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD123 package supports high-volume pick-and-place placement and meets UL 94V-0 flammability requirements.
The device exhibits a positive temperature coefficient of +3.8 mV/°C near 9.1 V, enabling predictable drift compensation in temperature-sensitive references. It is rated for operation from –65 °C to +150 °C and features a cathode band polarity indicator for unambiguous orientation during PCB layout and assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.5–9.6 V range at 5 mA - defines clamping/reference level in voltage regulation circuits |
| Power Dissipation (PD) | 500 mW at lead temperature 75 °C - sets maximum continuous power handling under heatsink-limited conditions |
| Zener Impedance (ZZT) | 15 Ω max at IZT = 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | 0.5 µA max at VR = 7.0 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W on FR-4 with 1-inch copper pad - informs derating requirements for ambient temperature operation |
| Operating Temperature | –65 °C to +150 °C - enables use in extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOD123 - surface-mount plastic case with matte tin-plated alloy 42 leadframe, cathode band marking, and 0.010 g mass. Compliant with J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground for shunt regulation |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Connected to higher-potential rail; delivers stable 9.1 V when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ distribution and repeatable breakdown behavior across production lots |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules and sensor interfaces |
| SOD123 footprint | Enables high-density PCB layouts and compatibility with standard 0805-class reflow profiles |
| Lead-free & halogen-free | Fully RoHS-compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental compliance mandates |
Applications
| Automotive Sensor Biasing | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Providing stable 9.1 V bias to analog sensor front-ends in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference for op-amp input stage and ADC reference divider networks. Use Value: Maintains signal integrity despite battery voltage fluctuations between 9–16 V, with <0.5 µA leakage minimizing sensor offset error. |
Use Scenario: Protecting 12 V logic rails from transient overvoltage events in PLC I/O modules. IC Role / Device Role / Timing Role: Low-energy crowbar element that clamps surges above 9.6 V before downstream ICs are stressed. Use Value: Limits peak rail voltage to ≤9.6 V with 15 Ω dynamic impedance, reducing need for bulk capacitance or TVS arrays. |
| Consumer Audio DC Reference | Medical Instrument Calibration |
Use Scenario: Generating precise mid-rail voltage for single-supply audio amplifiers in portable speakers. IC Role / Device Role / Timing Role: Passive voltage divider anchor point ensuring symmetrical AC coupling and reduced DC offset. Use Value: Delivers 9.1 V ±5.5% with +3.8 mV/°C TC, enabling predictable thermal tracking in compact enclosures. |
Use Scenario: Calibrating analog front-end gain stages in portable ECG monitors requiring traceable voltage standards. IC Role / Device Role / Timing Role: Secondary reference source used during factory calibration to verify DAC/ADC linearity. Use Value: Provides metrology-grade repeatability (±0.1 V over life) due to planar die stability and AEC-Q101 process controls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240B-7-F | Zener voltage 10 V (9.4–10.6 V), 350 mW PD, RθJA = 400 °C/W, SOT-23 package | Higher VZ and lower power rating; less thermally robust in high-ambient environments | Select when board space is constrained and 10 V reference suffices; avoid in >70 °C ambient without derating |
| BZX84-C9V1 | Zener voltage 9.1 V (8.6–9.6 V), 300 mW PD, RθJA = 350 °C/W, SOT-23 package | Narrower VZ tolerance but lower power capability; not AEC-Q101 qualified | Prefer for cost-sensitive commercial designs where automotive qualification is unnecessary and thermal margin is adequate |
Compared with MMBZ5240B-7-F and BZX84-C9V1, BZT52C9V1-7 offers superior thermal performance (500 mW @ 75 °C), AEC-Q101 validation, and tighter mechanical consistency via SOD123's larger thermal pad - making it optimal for automotive and industrial applications demanding long-term voltage stability under thermal stress.
Availability
BZT52C9V1-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power rail clamping, and medical instrument calibration requiring stable component supply, full RoHS compliance, and AEC-Q101 reliability assurance.
Supply support for BZT52C9V1-7 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 and manufacturing operations across Asia and the Americas.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and reference applications in automotive, industrial, and consumer electronics where precision, reliability, and automated assembly compatibility are essential.
FAQ
What is the maximum reverse voltage (VR) at which leakage current is specified for BZT52C9V1-7?
The datasheet specifies 0.5 µA maximum reverse leakage current at VR = 7.0 V. This value is measured under DC conditions at TA = +25 °C and defines the upper bound of parasitic current draw when the diode is biased below its nominal zener voltage - critical for low-power sensor bias networks.
Is BZT52C9V1-7 suitable for use in automotive applications?
Yes - BZT52C9V1-7 is qualified to AEC-Q101 standards, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its operating temperature range (–65 °C to +150 °C) and robust SOD123 package support under-hood deployment.
How does the temperature coefficient affect voltage regulation accuracy over temperature?
The BZT52C9V1-7 has a temperature coefficient of +3.8 mV/°C at 9.1 V. Over a 100 °C range (–40 °C to +60 °C), this results in approximately ±0.38 V drift - a predictable linear shift that can be compensated in system-level calibration or selected against adjacent voltage grades for net-zero TC designs.
What is the recommended PCB pad layout for SOD123 mounting?
Diodes Incorporated recommends a pad layout with X = 0.900 mm, X1 = 4.050 mm, and Y = 0.950 mm (all dimensions in mm). This geometry ensures reliable solder joint formation, thermal transfer to copper planes, and compatibility with standard 0805-class stencil apertures and reflow profiles.
BZT52C9V1-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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
BZT52C9V1-7 FAQ
1.How can I place an order for BZT52C9V1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C9V1-7 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 BZT52C9V1-7 reliable?
The price and inventory of BZT52C9V1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C9V1-7 is usually 5 days.
3.What payment methods are accepted for BZT52C9V1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C9V1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C9V1-7?
BZT52C9V1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C9V1-7 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 BZT52C9V1-7?
For technical support, including BZT52C9V1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C9V1-7 requirements.
6.How does Aetrix verify that BZT52C9V1-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C9V1-7 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 BZT52C9V1-7 meets industry standards.
7.What is the process for return or replacement of BZT52C9V1-7?
All BZT52C9V1-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C9V1-7, 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 BZT52C9V1-7 part is unused and in its original packaging.
Return procedure for BZT52C9V1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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