My Inquiry
My Account
Diodes Incorporated DDZ12BSF-7
- Part No.:
- DDZ12BSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ12BSF-7.pdf
- Description:
- DIODE ZENER 11.74V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:8,682
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDZ12BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode in SOD323F package, rated for 11.44–12.03V zener voltage at 10mA test current, with 30Ω max zener impedance and ±0.07µA reverse leakage at 10.9V, used for voltage regulation and reference in power supply feedback loops and analog sensor biasing circuits.
For engineers reviewing the DDZ12BSF-7 datasheet, DDZ12BSF-7 pinout, DDZ12BSF-7 application, or DDZ12BSF-7 equivalent, key selection criteria include tight VZ tolerance (±2.6%), low thermal resistance (250°C/W), automotive-grade process capability, and SOD323F footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 10mA zener test current and 30Ω dynamic impedance ensure predictable regulation across industrial ambient temperatures (−65°C to +150°C).
The device uses a planar epitaxial construction with cathode band marking, optimized for automated pick-and-place assembly. Its 250°C/W junction-to-ambient thermal resistance is specified on FR-4 PCB with 10mm × 10mm copper pad, enabling reliable 500mW dissipation without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.44–12.03 V at IZT = 10 mA - defines precise regulation point for feedback networks |
| Zener Impedance (ZZT) | ≤30 Ω at f = 1 kHz - ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤0.07 µA at VR = 10.9 V - guarantees negligible error current in high-impedance reference paths |
| Power Dissipation (PD) | 500 mW on FR-4 PCB - supports continuous operation in compact power management stages |
| Thermal Resistance (RθJA) | 250 °C/W - enables thermal design predictability without forced airflow or extra copper |
| Operating Temperature | −65°C to +150°C - qualified for under-hood automotive and industrial control environments |
| Package | SOD323F - 1.25 mm × 1.70 mm footprint with 0.25–0.35 mm lead width, compatible with 0.4 mm pitch reflow |
Pinout & Package
Package: SOD323F - ultra-small plastic surface-mount package with molded "Green" compound (UL 94V-0), matte tin-plated copper alloy leadframe, and cathode band marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or low-side reference; forms return path during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to feedback node or voltage sense point; maintains stable VZ above anode |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.6% (11.44–12.03 V range) - reduces need for post-production trimming in voltage references |
| Low dynamic impedance | ≤30 Ω at 1 kHz - minimizes AC ripple coupling into sensitive analog rails |
| Automated assembly compatibility | SOD323F tape-and-reel (3,000 pcs/reel) with J-STD-020 Level 1 moisture rating - eliminates baking steps in SMT line |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets automotive Tier-1 chemical requirements |
| Thermal performance | 250°C/W RθJA on standard FR-4 - allows full 500 mW operation without thermal derating in most board layouts |
Applications
| Switching Power Supply Feedback | Industrial Sensor Biasing |
|---|---|
|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference sets precise threshold for TL431-like comparator action in secondary-side regulation. Use Value: Tight 11.44–12.03 V tolerance ensures ±1.5% output accuracy across line/load/temperature without calibration. |
Use Scenario: Provides stable bias voltage for bridge-based pressure transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Precision reference source for ratiometric excitation of Wheatstone bridges. Use Value: ≤0.07 µA leakage prevents offset drift in 10 MΩ+ sensor interface impedances over −40°C to +85°C. |
| Automotive ECU Voltage Monitoring | Medical Instrument Reference |
|
Use Scenario: Monitors 12 V battery rail in engine control units using resistive divider into ADC input. IC Role / Device Role / Timing Role: Clamping diode protecting ADC input while providing known overvoltage threshold. Use Value: 150°C max operating temperature and AEC-Q200-aligned manufacturing support under-hood deployment. |
Use Scenario: Supplies reference voltage for 16-bit SAR ADCs in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing larger TO-92 Zeners in space-constrained designs. Use Value: SOD323F footprint saves >70% board area vs. DO-35; 30 Ω ZZT limits noise contribution to <5 µVpp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | VZ = 11.4–12.6 V (±5%), ZZT = 30 Ω, same SOT-23 package but higher RθJA (350°C/W) | Higher thermal resistance requires larger copper pour for 500 mW operation | Select when legacy SOT-23 footprint must be retained and tighter VZ tolerance is not required |
| MMSZ5242B-TP | VZ = 11.4–12.6 V (±5%), ZZT = 33 Ω, SOD-123 package (larger than SOD323F) | 0.12 mm taller profile and 2.7 mm × 1.6 mm footprint limit high-density routing | Choose for cost-sensitive consumer applications where SOD323F size advantage is unnecessary |
Compared with BZX84-C12LT1G and MMSZ5242B-TP, DDZ12BSF-7 delivers superior VZ tolerance (±2.6% vs. ±5%), lower thermal resistance (250°C/W), and smallest footprint-making it optimal for space-constrained, high-accuracy automotive and industrial systems.
Availability
DDZ12BSF-7 is available at Aetrix Electronics and suitable for switching power supplies, industrial sensor interfaces, automotive ECUs, and medical instrument references requiring stable component supply and long-term manufacturability.
Supply support for DDZ12BSF-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 sales operations across Asia, Europe, and North America.
The DDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and regulation in automotive, industrial, and medical applications demanding tight tolerance and robust thermal performance.
FAQ
What is the maximum continuous power dissipation for DDZ12BSF-7 on a standard PCB?
DDZ12BSF-7 is rated for 500 mW continuous power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad (board size 35 mm × 25 mm), per the manufacturer's thermal characterization in DS31987 Rev. 23-2. Derating begins above +25°C ambient at 2 mW/°C based on its 250°C/W RθJA.
How does the cathode band marking align with the SOD323F package outline?
The cathode band is a visible molded stripe on the top surface of the SOD323F package, located adjacent to the cathode terminal. Per Diodes' package drawing, it aligns with the shorter end of the rectangular body and corresponds to Pin 2 in the standard SOD323F pinout-confirmed by mechanical data on page 5 of DS31987.
Is DDZ12BSF-7 qualified for automotive applications per AEC-Q200?
DDZ12BSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not individually AEC-Q200 tested, Diodes states that parts in this family meet automotive change control requirements-including qualification to AEC-Q200 upon request-and are widely deployed in automotive ECUs per their quality definitions page.
What is the typical temperature coefficient for DDZ12BSF-7 near its nominal zener voltage?
Per Figure 3 in DS31987, the temperature coefficient for a 12 V-class Zener (e.g., DDZ12BSF-7) is approximately +3.5 mV/°C. This positive TC means VZ increases linearly with temperature, enabling compensation schemes when paired with negative-TC components like silicon diodes.
DDZ12BSF-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):
- 11.74 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 10.9 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-323F
DDZ12BSF-7 FAQ
1.How can I place an order for DDZ12BSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ12BSF-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 DDZ12BSF-7 reliable?
The price and inventory of DDZ12BSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ12BSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ12BSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ12BSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ12BSF-7?
DDZ12BSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ12BSF-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 DDZ12BSF-7?
For technical support, including DDZ12BSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ12BSF-7 requirements.
6.How does Aetrix verify that DDZ12BSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ12BSF-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 DDZ12BSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ12BSF-7?
All DDZ12BSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ12BSF-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 DDZ12BSF-7 part is unused and in its original packaging.
Return procedure for DDZ12BSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ12BSF-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…
