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Diodes Incorporated BZT52C9V1SQ-7-F
- Part No.:
- BZT52C9V1SQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C9V1SQ-7-F.pdf
- Description:
- DIODE ZENER 9.1V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
BZT52C9V1SQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 9.1 V zener voltage, 5 mA test current, 15 Ω maximum zener impedance at 1 kHz, 0.2 µA maximum reverse leakage at 7.0 V, and ±6% voltage tolerance. It operates in SOD323 package and is AEC-Q101 qualified for automotive power rail clamping and voltage reference applications.
For engineers reviewing the BZT52C9V1SQ-7-F datasheet, BZT52C9V1SQ-7-F pinout, BZT52C9V1SQ-7-F application, or BZT52C9V1SQ-7-F equivalent, key selection criteria include zener voltage accuracy (8.5–9.6 V), thermal resistance (625 °C/W), power dissipation (200 mW), and automotive qualification status - all critical for ECU voltage regulation and overvoltage protection design.
Technical Context
This Zener diode functions as a precision shunt voltage regulator in low-power analog and digital circuits. Its planar die construction ensures stable breakdown characteristics across temperature, with a +3.8 mV/°C temperature coefficient enabling predictable drift compensation in reference designs.
The device is rated for continuous operation from –65 °C to +150 °C and exhibits 100 Ω maximum knee impedance at 1 mA, supporting reliable turn-on behavior in transient suppression and biasing roles where low-current regulation is required.
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 regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 200 mW - limits continuous power handling on FR-4 PCB with recommended pad layout |
| Zener Impedance (ZZT) | 15 Ω max at 1 kHz, 5 mA - determines AC regulation stiffness and ripple rejection capability |
| Reverse Leakage (IR) | 0.2 µA max at 7.0 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - defines junction-to-ambient temperature rise per watt under specified mounting |
| Temperature Coefficient | +3.8 mV/°C - quantifies voltage drift with ambient temperature change |
| Package | SOD323 - 1.3 mm × 1.7 mm surface-mount outline compatible with automated placement |
Pinout & Package
The BZT52C9V1SQ-7-F is housed in a SOD323 plastic package with cathode band marking. Terminals are matte tin-plated alloy 42 leads, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward bias; reference node during reverse breakdown | Connected to lower-potential rail in shunt regulation; forms return path for zener current |
| Cathode | Current source during reverse breakdown; higher-potential terminal | Connected to regulated voltage node; polarity marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports RoHS-compliant end-product certification |
| Moisture sensitivity Level 1 | No bake requirement prior to reflow - simplifies SMT assembly without floor-life constraints |
| Planar die technology | Enables tight zener voltage distribution and stable long-term parameter drift |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control modules under load dump transients. IC Role / Device Role / Timing Role: Shunt voltage clamp protecting microcontroller supply pins from overvoltage events. Use Value: 9.1 V breakdown threshold provides margin above nominal 8.5 V minimum operating voltage while limiting peak stress to <10 V. | Use Scenario: Providing stable reference for 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference for op-amp biasing and ADC reference scaling. Use Value: ±6% tolerance and +3.8 mV/°C TC enable <1% total error over –40 to +125 °C industrial range. |
| Consumer USB-C Power Delivery Interface | Medical Portable Diagnostic Device Power Management |
Use Scenario: Overvoltage protection on VBUS line during USB-C negotiation and fast charging. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping fault conditions before they reach PMIC inputs. Use Value: 200 mW rating and 15 Ω ZZT ensure rapid response to 100 ns spikes without thermal runaway. | Use Scenario: Regulating auxiliary 3.3 V rail for low-power MCU and analog front-end in battery-operated diagnostics. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator replacing linear LDO where space and cost are constrained. Use Value: 0.2 µA IR at 7 V minimizes battery drain in sleep mode while maintaining accurate 9.1 V reference headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5240B-TP (Micro Commercial) | Same 9.1 V nominal, but ±5% tolerance and 100 mW rating - lower power and tighter voltage spec | Not AEC-Q101 qualified; suitable for commercial-grade consumer products only | Select when automotive qualification is unnecessary and tighter voltage tolerance is prioritized over power handling |
| BZX84-C9V1 (Nexperia) | Same 9.1 V nominal, SOT23 package (larger footprint), 250 mW rating, and ±5% tolerance | Requires different PCB layout; higher power enables higher current regulation but increases board area | Select when higher power dissipation is needed and SOT23 placement is already standardized in design |
Compared with MMSZ5240B-TP and BZX84-C9V1, BZT52C9V1SQ-7-F offers AEC-Q101 compliance in the compact SOD323 footprint with balanced 200 mW rating and ±6% tolerance - making it optimal for space-constrained automotive and industrial applications requiring certified reliability.
Availability
BZT52C9V1SQ-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and portable medical device power management requiring stable component supply and full traceability.
Supply support for BZT52C9V1SQ-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 the Americas.
The BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units and power management subsystems.
FAQ
What is the maximum allowable zener test current for BZT52C9V1SQ-7-F?
The device is characterized at 5 mA zener test current (IZT), and its absolute maximum DC zener current is derived from its 200 mW power rating and 9.1 V nominal voltage - yielding ~22 mA maximum continuous current. Exceeding this risks thermal runaway due to 625 °C/W junction-to-ambient resistance.
Does BZT52C9V1SQ-7-F have a defined forward voltage specification?
Yes - forward voltage is specified as 0.9 V maximum at 10 mA forward current (IF). This value reflects typical silicon diode conduction behavior and is relevant for applications using the device in forward-biased protection or level-shifting roles.
Can BZT52C9V1SQ-7-F be used in place of a 9.1 V Zener in an existing SOD323 footprint design?
Yes - it uses the standard SOD323 outline with cathode band polarity marking and matte tin terminals compliant with IPC-J-STD-020 moisture sensitivity Level 1. No rework or footprint modification is required for drop-in replacement in designs already using SOD323 Zeners.
How does the +3.8 mV/°C temperature coefficient affect circuit performance?
This positive coefficient means the zener voltage increases by approximately 3.8 mV per degree Celsius rise in junction temperature. In a 50 °C ambient-to-junction rise, voltage shifts +190 mV - a factor that must be included in tolerance stack-up for precision references, especially above 85 °C operating temperatures.
BZT52C9V1SQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6.04%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZT52C9V1SQ-7-F FAQ
1.How can I place an order for BZT52C9V1SQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C9V1SQ-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 BZT52C9V1SQ-7-F reliable?
The price and inventory of BZT52C9V1SQ-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 BZT52C9V1SQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C9V1SQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C9V1SQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C9V1SQ-7-F?
BZT52C9V1SQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C9V1SQ-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 BZT52C9V1SQ-7-F?
For technical support, including BZT52C9V1SQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C9V1SQ-7-F requirements.
6.How does Aetrix verify that BZT52C9V1SQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C9V1SQ-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 BZT52C9V1SQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C9V1SQ-7-F?
All BZT52C9V1SQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C9V1SQ-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 BZT52C9V1SQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C9V1SQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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