My Inquiry
My Account
Diodes Incorporated UDZ9V1BQ-7
- Part No.:
- UDZ9V1BQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
UDZ9V1BQ-7.pdf
- Description:
- DIODE ZENER SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,416
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UDZ9V1BQ-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal 9.1 V breakdown voltage (8.85–9.23 V), 200 mW power rating, and ±1% tolerance at 5 mA test current; it serves as a stable voltage reference in automotive power supply regulation and sensor biasing circuits.
For engineers reviewing the UDZ9V1BQ-7 datasheet, UDZ9V1BQ-7 pinout, UDZ9V1BQ-7 application, or UDZ9V1BQ-7 equivalent, key selection criteria include Zener voltage tolerance, low dynamic impedance (30 Ω at 5 mA), AEC-Q101 qualification, SOD323 package thermal resistance (625 °C/W), and automotive-grade traceability requirements.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with sharp knee characteristics and tightly controlled VZ distribution. Its 30 Ω Zener impedance at 5 mA and 60 Ω at 0.5 mA ensures minimal output voltage variation under load transients.
Designed for automotive environments, it features IATF16949-certified manufacturing, PPAP capability, and operates across –65 °C to +150 °C. The SOD323 package supports automated placement and offers 0.004 g mass with UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 8.85–9.23 V at 5 mA - defines precise regulation window for 9.1 V reference designs |
| Power Dissipation | 200 mW - limits continuous dissipation on FR-4 PCB with recommended pad layout |
| Zener Impedance | 30 Ω at 5 mA - ensures <±30 mV output shift per ±1 mA load change |
| Reverse Current | 0.5 µA at 6.0 V - guarantees low leakage in standby bias networks |
| Operating Temp | –65 °C to +150 °C - supports under-hood automotive electronics without derating |
| Thermal Resistance | 625 °C/W - determines junction-to-ambient temperature rise per mW dissipated |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount case (1.30 × 1.70 × 0.30 mm), matte tin–plated alloy 42 leadframe, cathode band marking, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated 9.1 V to load when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power management and sensor modules requiring zero-defect reliability |
| ±1% Zener voltage tolerance | Enables single-supply 9.1 V reference without post-production trimming |
| SOD323 footprint | Reduces PCB area by >50% vs. DO-35; compatible with high-speed pick-and-place |
| 625 °C/W RθJA | Allows full 200 mW operation at ambient ≤+75 °C with standard FR-4 layout |
| Halogen & antimony free | Meets automotive OEM green material specifications (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 9.1 V bias to analog front-end op-amps in ECU temperature and pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and sensor excitation. Use Value: Maintains ±0.5% reference accuracy over –40 °C to +125 °C engine bay conditions. | Use Scenario: Regulating supply to MEMS accelerometer signal chains in factory automation equipment. IC Role / Device Role / Timing Role: Low-noise DC reference source replacing larger TO-92 Zeners. Use Value: Enables 12-bit measurement resolution with <1 LSB drift across 10-year field life. |
| Medical Portable Diagnostic Device Power Rail | Telecom Base Station Bias Network |
Use Scenario: Generating calibrated 9.1 V rail for photodiode transimpedance amplifier bias in handheld pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage (<0.5 µA) Zener reference isolating analog signal path from digital noise. Use Value: Prevents baseline drift in DC-coupled optical sensing under battery-voltage variation. | Use Scenario: Stabilizing bias voltage for RF power amplifier driver stages in 4G/LTE remote radio units. IC Role / Device Role / Timing Role: Temperature-stable voltage clamp protecting gate drive circuitry from transient overvoltage. Use Value: Survives 100,000+ thermal cycles between –30 °C and +85 °C without VZ shift >±0.2%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1LT1G | Same 9.1 V nominal, but ±5% tolerance (vs. ±1%) and higher ZZT (60 Ω) | Suitable for non-critical consumer power rails; not AEC-Q101 qualified | Select only if cost sensitivity outweighs regulation precision and automotive compliance |
| MMSZ5240B-TP | 9.1 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package (larger footprint) | Higher power handling but lacks automotive qualification and tight VZ binning | Prefer where board space allows and thermal margin exceeds 300 mW |
Compared with BZX84-C9V1LT1G and MMSZ5240B-TP, UDZ9V1BQ-7 delivers superior voltage stability (±1% vs. ±5%), lower dynamic impedance (30 Ω vs. ≥60 Ω), and guaranteed automotive qualification-making it the sole choice for safety-relevant ECU and ADAS subsystems.
Availability
UDZ9V1BQ-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, medical diagnostic devices, and telecom base station bias networks requiring stable component supply with full AEC-Q101 traceability.
Supply support for UDZ9V1BQ-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 UDZ9V1BQ belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for automotive voltage reference and regulation applications demanding high reliability and tight parametric control.
FAQ
What is the maximum reverse voltage before breakdown for UDZ9V1BQ-7?
The UDZ9V1BQ-7 exhibits sharp Zener breakdown between 8.85 V and 9.23 V at 5 mA test current. Below 6.0 V, reverse leakage remains ≤0.5 µA. It is not rated for sustained reverse operation below VZ; operation outside this range risks instability or excessive leakage.
Can UDZ9V1BQ-7 replace a 1N4739A in an existing design?
No-UDZ9V1BQ-7 is a 9.1 V SOD323 surface-mount Zener, while 1N4739A is a 9.1 V through-hole DO-41 device with 1 W rating and different thermal behavior. Direct replacement requires PCB redesign, thermal validation, and verification of leakage performance at low bias voltages.
Is the SOD323 package compatible with standard reflow profiles?
Yes-the SOD323 package is qualified for IPC/JEDEC J-STD-020 Level 1 moisture sensitivity and supports standard lead-free reflow profiles (peak 260 °C, 60-second duration). Matte tin plating ensures reliable solder wetting per MIL-STD-202 Method 208.
Does UDZ9V1BQ-7 require external series resistance in typical applications?
Yes-a current-limiting resistor is mandatory to set operating current within 0.5–20 mA range. For 12 V input and 5 mA Zener current, a 560 Ω ±1% resistor delivers 9.1 V with <±0.1% regulation error due to resistor tolerance and thermal drift.
UDZ9V1BQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- -
- Supplier Device Package:
- -
UDZ9V1BQ-7 FAQ
1.How can I place an order for UDZ9V1BQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for UDZ9V1BQ-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 UDZ9V1BQ-7 reliable?
The price and inventory of UDZ9V1BQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDZ9V1BQ-7 is usually 5 days.
3.What payment methods are accepted for UDZ9V1BQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDZ9V1BQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDZ9V1BQ-7?
UDZ9V1BQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDZ9V1BQ-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 UDZ9V1BQ-7?
For technical support, including UDZ9V1BQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDZ9V1BQ-7 requirements.
6.How does Aetrix verify that UDZ9V1BQ-7 is sourced from the original manufacturer or authorized distributors?
All UDZ9V1BQ-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 UDZ9V1BQ-7 meets industry standards.
7.What is the process for return or replacement of UDZ9V1BQ-7?
All UDZ9V1BQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with UDZ9V1BQ-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 UDZ9V1BQ-7 part is unused and in its original packaging.
Return procedure for UDZ9V1BQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UDZ9V1BQ-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
