My Inquiry
My Account
Diodes Incorporated D3Z12BF-7
- Part No.:
- D3Z12BF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
D3Z12BF-7.pdf
- Description:
- DIODE ZENER 12V 400MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
D3Z12BF-7 from Diodes Incorporated is a 0.4W surface-mount precision Zener diode with nominal zener voltage 12.0V (min 11.74V, max 12.24V at IZT = 5mA), 10Ω maximum zener impedance at test current, ±0.1μA maximum reverse leakage at 9V, and SOD323F package. It delivers stable voltage reference in low-power analog monitoring circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the D3Z12BF-7 datasheet, D3Z12BF-7 pinout, D3Z12BF-7 application, or D3Z12BF-7 equivalent, key selection criteria include zener voltage tolerance (±2.1%), thermal resistance (312.5°C/W), cathode-band polarity marking, FR-4 PCB derating behavior, and AEC-Q200 suitability for automotive-grade signal conditioning.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain precise DC voltage regulation under varying load and temperature conditions. Its tight VZ tolerance (±2.1% at 25°C), low dynamic impedance (10Ω @ 5mA), and negative temperature coefficient (−8.2 mV/°C) enable high-accuracy reference generation in compact space-constrained designs.
The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe and green molding compound (UL 94V-0). It exhibits 0.9V forward voltage at 10mA and supports automated pick-and-place assembly due to standardized SOD323F footprint and moisture sensitivity level 1 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.74–12.24 V at 5 mA - defines regulated output range for reference stability |
| Power Dissipation (PD) | 400 mW on FR-4 PCB - sets maximum continuous power handling before thermal derating |
| Zener Impedance (ZZT) | 10 Ω @ 5 mA - determines regulation stiffness against load transients |
| Reverse Leakage (IR) | 0.1 μA @ 9 V - ensures minimal error current in high-impedance bias networks |
| Temperature Coefficient | −8.2 mV/°C - enables predictable drift compensation in temperature-critical references |
| Total Capacitance | 36 pF @ 0 V - impacts high-frequency noise rejection and AC coupling behavior |
Pinout & Package
Package: SOD323F - ultra-small plastic surface-mount package (1.25 mm × 1.70 mm × 0.95 mm), cathode identified by band marking, lead-free and RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; forms reference return path in shunt regulator topology |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail via series resistor; supplies stable voltage to downstream circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±2.1% VZ tolerance enables <1% system-level reference error without trimming |
| Automated assembly compatibility | SOD323F footprint and matte tin finish ensure reliable solder wetting and placement yield |
| Thermal stability | 312.5°C/W junction-to-ambient resistance allows operation up to +125°C ambient with proper layout |
| Environmental compliance | Halogen- and antimony-free "Green" compound (<900 ppm Br+Cl, <1000 ppm Sb) meets automotive and industrial RoHS 3 requirements |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback paths. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to optocoupler or TL431 comparator input. Use Value: Tight 12.0V tolerance minimizes output deviation across line/load/temperature; 10Ω ZZT maintains loop stability under transient load steps. |
Use Scenario: Clamping surge-induced voltage spikes on 12V automotive sensor lines. IC Role / Device Role / Timing Role: Passive overvoltage clamp protecting MCU GPIOs and analog front-ends from ESD or load dump. Use Value: 0.1μA leakage at 9V prevents false triggering; 400mW rating absorbs short-duration transients without failure. |
| Low-Power Reference | Signal Level Shifting |
Use Scenario: Generating stable 12V bias for op-amp rails or ADC reference buffers in battery-powered instrumentation. IC Role / Device Role / Timing Role: Precision DC reference source replacing larger, more expensive IC-based solutions. Use Value: 36pF capacitance avoids high-frequency coupling into sensitive analog nodes; −8.2mV/°C TC allows predictable calibration offset correction. |
Use Scenario: Translating logic-level signals between 3.3V microcontrollers and 12V industrial sensors. IC Role / Device Role / Timing Role: Bidirectional level translator using Zener clamping to limit high-side swing. Use Value: Cathode-band polarity ensures unambiguous orientation during manual rework; SOD323F size fits dense routing near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | 12V ±5% tolerance, 300mW rating, SOT-23 package, 30Ω ZZT | Higher voltage drift and impedance reduce accuracy in precision feedback loops | Select when cost sensitivity outweighs regulation accuracy and board space permits larger SOT-23 footprint |
| MMSZ4687T1G | 12V ±5%, 500mW, SOD-123, 20Ω ZZT, −7.5mV/°C TC | Higher power but looser tolerance and less negative TC than D3Z12BF-7 | Prefer for higher-energy transient suppression where ±5% VZ is acceptable and thermal margin is critical |
Compared with BZX84-C12LT1G and MMSZ4687T1G, D3Z12BF-7 offers superior voltage accuracy (±2.1% vs. ±5%), lower dynamic impedance (10Ω vs. ≥20Ω), and tighter thermal drift control-making it optimal for closed-loop regulation where reference error directly impacts system performance.
Availability
D3Z12BF-7 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power supply feedback networks, and portable medical device voltage references requiring stable component supply and long-term lifecycle continuity.
Supply support for D3Z12BF-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 distribution operations across Asia, Europe, and North America.
D3Z12BF-7 belongs to the D3Z series of precision Zener diodes engineered for high-stability voltage referencing in automotive, industrial, and communications systems where tight tolerance, low leakage, and environmental compliance are mandatory.
FAQ
What is the maximum operating temperature for D3Z12BF-7?
The D3Z12BF-7 has an operating temperature range of −65°C to +150°C for both junction and storage. At +125°C ambient, its power dissipation must be derated to approximately 240mW per the published derating curve, assuming standard FR-4 PCB layout with 35mm × 25mm copper area.
Is D3Z12BF-7 qualified for automotive applications?
D3Z12BF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 out-of-box, Diodes Incorporated confirms this part can be qualified per customer-specific AEC-Q200 stress test plans upon request and is widely used in automotive body control modules and sensor interfaces.
How does the cathode band identify polarity on the SOD323F package?
The cathode band is a visible dark stripe located at one end of the SOD323F package body, aligned with the cathode terminal. In top view, the band corresponds to the right-hand pin when the marking code (LH) and date code are oriented upright; this matches the standard SOD323F pin 1 designation per JEDEC outline.
Can D3Z12BF-7 replace older D3Z12B variants?
Yes-D3Z12BF-7 supersedes D3Z12B with identical electrical specs and improved environmental compliance (halogen/antimony-free, RoHS 3). The "F" suffix denotes green packaging and matte tin plating; mechanical dimensions, pinout, and thermal characteristics remain unchanged, enabling drop-in replacement in existing designs.
D3Z12BF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
D3Z12BF-7 FAQ
1.How can I place an order for D3Z12BF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for D3Z12BF-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 D3Z12BF-7 reliable?
The price and inventory of D3Z12BF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D3Z12BF-7 is usually 5 days.
3.What payment methods are accepted for D3Z12BF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D3Z12BF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D3Z12BF-7?
D3Z12BF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D3Z12BF-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 D3Z12BF-7?
For technical support, including D3Z12BF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D3Z12BF-7 requirements.
6.How does Aetrix verify that D3Z12BF-7 is sourced from the original manufacturer or authorized distributors?
All D3Z12BF-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 D3Z12BF-7 meets industry standards.
7.What is the process for return or replacement of D3Z12BF-7?
All D3Z12BF-7 units undergo pre-shipment inspection (PSI). If there is an issue with D3Z12BF-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 D3Z12BF-7 part is unused and in its original packaging.
Return procedure for D3Z12BF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
D3Z12BF-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…
