My Inquiry
My Account
Diodes Incorporated DDZ26-7
- Part No.:
- DDZ26-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ26-7.pdf
- Description:
- DIODE ZENER 26V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,399
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDZ26-7 from Diodes Incorporated is a surface-mount precision Zener diode designed for voltage regulation and reference applications in power supply feedback loops, analog signal conditioning, and overvoltage protection circuits. It delivers a nominal Zener voltage of 25.6 V (min 24.97 V, max 26.26 V) at 5 mA test current, with 45 Ω dynamic impedance at 1 kHz, 0.05 µA reverse leakage at 21.0 V, and operates across –65°C to +150°C.
For engineers reviewing the DDZ26-7 datasheet, DDZ26-7 pinout, DDZ26-7 application, or DDZ26-7 equivalent, this device is selected for stable low-power voltage reference needs where tight VZ tolerance (±2.5%), low temperature coefficient (~0.08%/°C), and SOD123 package compatibility with automated assembly are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its 5 mA Zener test current and 45 Ω impedance at 1 kHz ensure predictable regulation behavior in low-current bias networks and feedback dividers.
The device uses alloy-42 leadframe with matte tin annealed terminals, rated for 294 mW power dissipation on minimal pad layout and 470 mW on 1-in² copper, with thermal resistance of 425 °C/W (Note 8) and 266 °C/W (Note 7), enabling reliable operation in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.97–26.26 V at IZT = 5 mA - defines precise regulation window for feedback or clamp circuits |
| Zener Impedance (ZZT) | 45 Ω at f = 1 kHz - ensures minimal output voltage variation under small-signal AC load changes |
| Reverse Leakage (IR) | 0.05 µA at VR = 21.0 V - guarantees negligible error current in high-impedance reference nodes |
| Power Dissipation (PD) | 294 mW on minimal pad layout - sets maximum continuous DC power in space-constrained designs |
| Operating Temperature | –65°C to +150°C - supports industrial and automotive under-hood environments without derating |
| Temperature Coefficient | ~0.08%/°C near 26 V - enables stable reference performance across wide ambient ranges |
Pinout & Package
Package: SOD123 - surface-mount plastic package with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (E × D × A); moisture sensitivity level 1 per J-STD-020; RoHS-compliant, halogen- and antimony-free "Green" compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input voltage source and feedback network; carries regulated reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| Very tight VZ tolerance | ±2.5% (24.97–26.26 V) - reduces need for external trimming in precision references |
| Low dynamic impedance | 45 Ω at 1 kHz - maintains regulation accuracy under moderate AC ripple or transient loading |
| Ultra-low reverse leakage | 0.05 µA @ 21.0 V - preserves accuracy in high-resistance divider networks and battery-powered systems |
| SOD123 package compatibility | Standard footprint with 0.57 mm lead pitch - enables use with standard pick-and-place equipment and IPC-7351B land patterns |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 25.6 V reference to TL431-like controller or comparator input. Use Value: Tight VZ tolerance minimizes output voltage drift across production units and temperature; low ZZT improves transient response to load steps. |
Use Scenario: Biasing and scaling analog outputs from pressure, temperature, or current sensors before ADC input. IC Role / Device Role / Timing Role: Precision reference for ratiometric scaling or offset correction in instrumentation amplifiers. Use Value: Sub-microamp leakage prevents loading of high-impedance sensor bridges; wide temperature range ensures calibration stability in factory-floor environments. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuitry |
Use Scenario: Protecting downstream ICs from transient overvoltage events on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Clamping element diverting excess energy to ground when line voltage exceeds 26.3 V threshold. Use Value: Fast Zener turn-on and low ZZT limit clamped voltage overshoot; robust 150°C rating withstands repeated surge stress. |
Use Scenario: Generating clean, temperature-stable reset signal for ARM Cortex-M or PIC microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Reference voltage source for external reset supervisor IC or RC-based reset timing network. Use Value: Stable 25.6 V reference enables accurate threshold setting for 3.3 V or 5 V supply monitoring; low TC ensures consistent trip point from –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | Zener voltage 27 V (25.65–28.35 V), 80 Ω ZZT, 200 mW PD, SOT-23 package | Higher VZ and higher impedance; requires larger board area due to different footprint | Select when 27 V nominal reference is acceptable and SOT-23 mounting is preferred over SOD123 |
| MMSZ5252ET1G | Zener voltage 26 V (24.7–27.3 V), 35 Ω ZZT, 500 mW PD, SOD-123 package | Nearly identical VZ range and same package, but higher power rating and tighter ZZT | Prefer for higher-power margin or improved regulation stability where 500 mW dissipation is needed |
Compared with DDZ26-7, BZX84-C27LT1G offers higher nominal voltage and different packaging, while MMSZ5252ET1G matches the SOD123 form factor with superior power handling and lower impedance-making it suitable for more demanding regulation loads without layout change.
Availability
DDZ26-7 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and automotive body control units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ26-7 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, specializing in high-reliability components for industrial, automotive, and computing markets.
The DDZ series targets precision voltage reference and regulation in cost-sensitive, high-volume applications-designed specifically for automated SMT assembly, AEC-Q101 qualification readiness, and green manufacturing compliance.
FAQ
What is the minimum Zener test current required to achieve specified VZ for DDZ26-7?
The datasheet specifies Zener voltage at IZT = 5 mA. Below this current, VZ drops significantly due to knee-region nonlinearity; operation below 2 mA yields unstable regulation and increased temperature sensitivity. For stable reference use, maintain ≥5 mA through the device using appropriate series resistance.
Can DDZ26-7 be used in place of a 24 V Zener diode?
No-DDZ26-7 has a guaranteed minimum Zener voltage of 24.97 V and maximum of 26.26 V, making it unsuitable as a true 24 V reference. For 24 V regulation, DDZ24C (23.12–24.31 V) is the correct variant in the same series and package.
Is DDZ26-7 qualified for automotive applications?
The base DDZ26-7 part is commercial-grade; the automotive-qualified version is DDZ26Q-7, which is AEC-Q101 certified, PPAP capable, and manufactured in IATF16949-certified facilities. Only DDZ26Q-7 meets automotive reliability and change-control requirements.
How does the SOD123 package affect thermal performance compared to larger packages?
With RθJA = 425 °C/W on minimal pads, the SOD123 limits continuous power dissipation to 294 mW at 25°C ambient. To improve thermal margin, increase copper area around the cathode/anode pads or use thermal vias-this can reduce RθJA toward 266 °C/W (470 mW rating) as verified in FR-4 board testing.
DDZ26-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 26 V
- Tolerance:
- ±2.5%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-123
DDZ26-7 FAQ
1.How can I place an order for DDZ26-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ26-7 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 DDZ26-7 reliable?
The price and inventory of DDZ26-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ26-7 is usually 5 days.
3.What payment methods are accepted for DDZ26-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ26-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ26-7?
DDZ26-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ26-7 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 DDZ26-7?
For technical support, including DDZ26-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ26-7 requirements.
6.How does Aetrix verify that DDZ26-7 is sourced from the original manufacturer or authorized distributors?
All DDZ26-7 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 DDZ26-7 meets industry standards.
7.What is the process for return or replacement of DDZ26-7?
All DDZ26-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ26-7, 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 DDZ26-7 part is unused and in its original packaging.
Return procedure for DDZ26-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ26-7 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…
