My Inquiry
My Account
Diodes Incorporated DDZ9709-7
- Part No.:
- DDZ9709-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9709-7.pdf
- Description:
- DIODE ZENER 24V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:17,714
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDZ9709-7 from Diodes Incorporated is a surface-mount low-current Zener diode with nominal zener voltage 24 V (min 22.8 V, max 25.2 V), rated for 500 mW power dissipation on FR-4 PCB at TL = +75°C, and specified at low test current of 50 µA - ideal for precision voltage reference and low-bias battery-powered circuits in portable instrumentation and sensor signal conditioning.
For engineers reviewing the DDZ9709-7 datasheet, DDZ9709-7 pinout, DDZ9709-7 application, or DDZ9709-7 equivalent, this device serves as a stable, low-leakage (≤0.05 µA @ VR = 18.2 V) voltage clamp in power rail monitoring, overvoltage protection, and analog reference design where thermal stability and SOD123 footprint compatibility are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under controlled current conditions. Its 24 V nominal zener voltage exhibits a temperature coefficient of approximately +0.07 %/°C (per Fig. 14 & 19), indicating positive drift with rising junction temperature - a key consideration in ambient-varying applications.
The device uses a planar epitaxial construction in an SOD123 package with cathode band marking, optimized for automated placement and reflow soldering. Thermal resistance junction-to-lead is 150 °C/W, enabling reliable operation up to +150°C junction temperature when properly mounted on minimum recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 24 V - stable reference point for voltage regulation or clamping at typical operating current |
| Zener Voltage Range | 22.8 V to 25.2 V - ensures production yield compliance and design margin for 24 V target |
| Test Current (IZT) | 50 µA - enables ultra-low-power biasing in battery-critical systems |
| Max Reverse Leakage (IR) | 0.05 µA @ VR = 18.2 V - minimizes quiescent current loss in high-impedance sensing nodes |
| Power Dissipation (PD) | 500 mW - supports continuous operation on standard FR-4 PCB with 1-inch² copper pad at TL = +75°C |
| Thermal Resistance (RθJL) | 150 °C/W - defines junction-to-lead heat transfer efficiency for thermal design validation |
| Operating Temp Range | −65°C to +150°C - suitable for industrial and automotive under-hood environments |
Pinout & Package
Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode marked by band. Dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm, He = 3.55–3.85 mm.
| 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 configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated rail; maintains 24 V relative to anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | 50 µA IZT enables use in microampere-bias circuits without compromising regulation accuracy |
| Automated assembly compatibility | SOD123 footprint and matte tin finish ensure robust solderability per MIL-STD-202, Method 208 |
| Green material compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), fully RoHS 3 compliant |
| Thermal derating profile | Linear PD reduction above +75°C ambient enables predictable power handling in thermally constrained layouts |
Applications
| Battery Voltage Monitor | Portable Sensor Reference |
|---|---|
|
Use Scenario: Monitoring Li-ion battery pack voltage in handheld medical devices to trigger low-battery alert at 24 V threshold. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 24 V comparison point for comparator input. Use Value: Low 50 µA test current avoids loading the high-impedance battery sense line, preserving measurement accuracy and runtime. |
Use Scenario: Supplying stable reference for 24 V rail in MEMS pressure sensor module powered by coin cell. IC Role / Device Role / Timing Role: Zener clamp maintaining fixed reference voltage for ADC reference buffer circuitry. Use Value: 0.05 µA leakage at 18.2 V ensures negligible drain on 20 mA·h coin cell over multi-year deployment. |
| Industrial PLC Input Protection | Automotive CAN Node Clamp |
|
Use Scenario: Protecting 24 V digital input channel in programmable logic controller against transient overvoltage events. IC Role / Device Role / Timing Role: Fast-response voltage clamp limiting input to ≤25.2 V during surge conditions. Use Value: Tight 22.8–25.2 V zener tolerance ensures consistent trip level across temperature and unit variance. |
Use Scenario: Clamping common-mode voltage on 24 V supply rail feeding CAN transceiver in commercial vehicle ECU. IC Role / Device Role / Timing Role: Secondary overvoltage protection stage downstream of primary TVS diode. Use Value: AEC-Q101 qualified variant (DDZ9709Q-7) supports automotive PPAP requirements and IATF 16949 traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | Same 24 V nominal, but 300 mW rating and higher IR (0.1 µA @ 18.2 V); SOT-23 package | Higher power density but less thermal margin on FR-4; unsuitable for >75°C ambient without derating | Select when board space is constrained and thermal load is low; verify pad thermal relief matches SOT-23 layout |
| MMSZ5242BT1G | 24 V nominal, 500 mW rating, but 20 µA IZT and higher impedance (100 Ω typical); SOD-123 same | Higher dynamic impedance reduces regulation precision under varying load; requires larger bypass cap | Prefer for cost-sensitive non-precision applications; avoid in high-accuracy reference paths |
Compared with BZX84-C24LT1G and MMSZ5242BT1G, DDZ9709-7 delivers superior low-current regulation stability (50 µA IZT), tighter voltage tolerance (±5%), and verified thermal performance on FR-4 - making it optimal for precision, low-power, and thermally demanding designs.
Availability
DDZ9709-7 is available at Aetrix Electronics and suitable for battery management systems, portable instrumentation, industrial PLC inputs, and automotive ECU power rail protection requiring stable component supply and long-term obsolescence mitigation.
Supply support for DDZ9709-7 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.
This device belongs to the DDZ9678–DDZ9717 series of low-current Zener diodes engineered specifically for precision voltage referencing in space-constrained, low-power, and thermally challenging applications - including portable, industrial, and automotive systems.
FAQ
What is the maximum reverse leakage current for DDZ9709-7, and at what voltage is it measured?
The maximum reverse leakage current is 0.05 µA, measured at VR = 18.2 V (75% of nominal zener voltage). This value is specified in the Electrical Characteristics table and confirmed in Figure 21 for ambient temperatures up to +125°C. It reflects minimal standby current draw critical for battery longevity.
Can DDZ9709-7 be used in automotive applications?
Yes - the automotive-grade variant DDZ9709Q-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. The standard DDZ9709-7 is not automotive-qualified but shares identical electrical and thermal specs; only the Q-suffix version meets automotive change control and traceability requirements.
What is the thermal resistance from junction to ambient (RθJA) for DDZ9709-7 on FR-4 PCB?
RθJA is 340 °C/W when mounted on FR-4 PCB with minimum recommended pad layout at TL = +75°C. This value assumes a 1-inch² copper pad and is derived from the Power Dissipation Derating curve (Figure 1). Actual RθJA will improve with enhanced copper area or thermal vias.
How does the temperature coefficient affect regulation accuracy across operating temperature?
DDZ9709-7 exhibits a typical temperature coefficient of +0.07 %/°C (per Fig. 14 & 19), meaning its zener voltage increases ~16.8 mV/°C around 24 V. Over −40°C to +125°C, this results in ±1.1 V total drift - acceptable for non-critical clamping but requires compensation in precision reference designs.
DDZ9709-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ9709-7 FAQ
1.How can I place an order for DDZ9709-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9709-7 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 DDZ9709-7 reliable?
The price and inventory of DDZ9709-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9709-7 is usually 5 days.
3.What payment methods are accepted for DDZ9709-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9709-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9709-7?
DDZ9709-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9709-7 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 DDZ9709-7?
For technical support, including DDZ9709-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9709-7 requirements.
6.How does Aetrix verify that DDZ9709-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9709-7 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 DDZ9709-7 meets industry standards.
7.What is the process for return or replacement of DDZ9709-7?
All DDZ9709-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9709-7, 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 DDZ9709-7 part is unused and in its original packaging.
Return procedure for DDZ9709-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9709-7 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…
