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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Diodes Incorporated DDZ9707S-7

Name: DDZ9707S-7
Brand: Diodes Incorporated
SKU: DDZ9707S-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDZ9707S-7

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: DDZ9707S-7.pdf

Description:: DIODE ZENER 20V 200MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:2,970

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Product details

Overview

DDZ9707S-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal Zener voltage of 20 V, ±5% tolerance (19.0–21.0 V), 50 μA test current, and maximum reverse leakage of 0.05 μA at 15.2 V. It features sharp breakdown characteristics, low thermal resistance (625 °C/W), and SOD-323 package for space-constrained voltage reference and regulation in power supply feedback loops.

For engineers reviewing the DDZ9707S-7 datasheet, DDZ9707S-7 pinout, DDZ9707S-7 application, or DDZ9707S-7 equivalent, key selection criteria include Zener voltage accuracy at I_ZT = 50 μA, temperature coefficient (~0.08 %/°C per Fig. 18), low leakage under bias, thermal derating behavior, and SOD-323 footprint compatibility with automated assembly.

Technical Context

This device operates as a two-terminal shunt voltage reference, maintaining stable output by conducting reverse current above its specified Zener breakdown threshold. Its sharp knee and tight V_Z tolerance enable accurate regulation in low-power analog circuits and feedback networks where precision and repeatability are critical.

Designed for thermal equilibrium at T_T = 30°C ±1°C during V_Z measurement, it exhibits predictable temperature coefficient behavior (≈+0.08 %/°C near 20 V) and maintains <0.05 μA leakage at VR = 15.2 V - supporting low-quiescent-current designs in battery-powered and energy-efficient systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	20 V - precise reference point for feedback or clamping at I_ZT = 50 μA
Zener Voltage Range	19.0–21.0 V - ±5% initial tolerance ensures predictable regulation window
Max Reverse Leakage	0.05 μA @ 15.2 V - enables ultra-low standby current in voltage-sense paths
Power Dissipation	200 mW - limits continuous dissipation on FR-4 PCB with recommended pad layout
Thermal Resistance	625 °C/W - defines junction-to-ambient rise under load; requires thermal-aware layout
Operating Temp Range	−65 to +150 °C - supports industrial and automotive under-hood environments
Package	SOD-323 - 2-pin surface-mount outline (2.3–2.7 mm length) for high-density PCBs

Pinout & Package

Package: SOD-323 - molded plastic case, cathode band marking, matte tin terminals, JEDEC-compliant footprint (L: 2.3–2.7 mm, W: 1.2–1.4 mm, H: 0.25–0.35 mm).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference node	Connected to lower-potential side in shunt configuration; forms reference ground return path
Cathode	Zener breakdown terminal / voltage sense node	Connected to regulated rail or error amplifier input; carries reverse current above V_Z

Key Features

Feature	Design Value
Very sharp breakdown knee	Enables clean transition into regulation with minimal voltage hysteresis across I_Z
Tight V_Z tolerance (±5%)	Reduces need for post-production trimming in precision feedback networks
Low leakage (0.05 μA)	Minimizes error current in high-impedance voltage divider or op-amp reference inputs
RoHS-compliant & "Green" molding	Meets environmental compliance requirements without sacrificing thermal or electrical performance
Suitable for automated assembly	Standard SOD-323 footprint and leadframe design support pick-and-place and reflow processes

Applications

Switching 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 precise 20 V threshold to TL431-like control IC or error amplifier input.

Use Value: ±5% V_Z tolerance and low leakage ensure stable regulation across line/load variations without calibration.

Use Scenario: Biasing and level-shifting analog sensor outputs (e.g., RTD, strain gauge bridges) before ADC input.

IC Role / Device Role / Timing Role: Precision voltage clamp and reference source for ratiometric scaling or offset correction.

Use Value: Sharp breakdown and low tempco minimize drift-induced errors over −40 to +125 °C operating range.

Low-Power Battery Monitor

Overvoltage Protection Circuit

Use Scenario: Monitoring Li-ion pack voltage (e.g., 4S stack ≈ 16.8 V full, 12 V depleted) with microcontroller ADC.

IC Role / Device Role / Timing Role: Passive Zener divider element establishing known reference ratio for scaled-down input sensing.

Use Value: 0.05 μA leakage preserves battery life in always-on monitoring mode; SOD-323 saves board area.

Use Scenario: Clamping transient surges on 18–22 V DC rails (e.g., automotive infotainment power input).

IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting excess energy when rail exceeds 20 V nominal.

Use Value: Sharp knee ensures rapid conduction onset; 200 mW rating supports short-duration surge absorption.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C20LT1G	Same 20 V nominal, ±5% tolerance, but higher max leakage (1 μA @ 15.2 V); SOT-23 package	Larger footprint; less suitable for ultra-low-leakage or space-constrained layouts	Prefer when SOT-23 is already standardized in BOM and leakage budget allows >0.05 μA
MMSZ5248B-TP	20 V nominal, ±5%, but rated at I_ZT = 20 mA (vs. 50 μA); higher Z_ZT (30 Ω vs. ~25 Ω)	Higher test current shifts operating point; less ideal for low-current feedback paths	Select only if circuit delivers ≥20 mA Zener bias and thermal margin permits higher dissipation

Compared with BZX84-C20LT1G and MMSZ5248B-TP, DDZ9707S-7 offers superior leakage performance and tighter low-current regulation stability - making it optimal for precision, low-power, and high-density applications where SOD-323 fit and sub-μA leakage are mandatory.

Availability

DDZ9707S-7 is available at Aetrix Electronics and suitable for switching power supply feedback, industrial sensor signal conditioning, low-power battery monitoring, and overvoltage protection requiring stable component supply and consistent parametric performance across production lots.

Supply support for DDZ9707S-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, application-optimized components for power management, signal integrity, and protection.

DDZ9707S-7 belongs to the DDZ9689S–DDZ9717S precision Zener series, engineered specifically for stable voltage referencing in compact, automated-assembly environments - emphasizing tight tolerance, low leakage, and thermal predictability.

FAQ

What is the Zener test current (I_ZT) for DDZ9707S-7?

The Zener test current is 50 μA, as specified in the Electrical Characteristics table. This current establishes the nominal 20 V Zener voltage under thermal equilibrium conditions at 30°C ±1°C. Operating significantly above or below this current alters V_Z due to dynamic impedance and temperature effects.

Does DDZ9707S-7 have AEC-Q101 qualification?

No - DDZ9707S-7 is not listed as AEC-Q101 qualified in DS30409 Rev. 6-2. Only DDZ9705S (marked with Note 5) is explicitly qualified to AEC-Q101. DDZ9707S-7 meets industrial-grade reliability standards but lacks automotive stress-test certification.

What is the typical Zener impedance (Z_ZT) at 50 μA for DDZ9707S-7?

While not directly tabulated, Figure 14 shows typical Zener impedance for DDZ9705S–DDZ9709S at 20 V is approximately 25 Ω at 1 mA. At 50 μA, impedance rises significantly - extrapolating from Fig. 11–16 trends, Z_ZT is estimated between 150–200 Ω, consistent with low-current Zener behavior.

Can DDZ9707S-7 replace a 20 V Zener in a TL431-based feedback circuit?

Yes - it can serve as the external reference element in place of the internal bandgap in TL431 configurations. Its 20 V nominal value, low leakage, and sharp knee allow direct substitution when the TL431's reference pin is biased externally, provided the 50 μA minimum Zener current is maintained and thermal layout accommodates 200 mW dissipation.

DDZ9707S-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 20 V

Tolerance:: ±5%

Power - Max:: 200 mW

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: 50 nA @ 15.2 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-323

DDZ9707S-7 FAQ

1.How can I place an order for DDZ9707S-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDZ9707S-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 DDZ9707S-7 reliable?

The price and inventory of DDZ9707S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9707S-7 is usually 5 days.

3.What payment methods are accepted for DDZ9707S-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9707S-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDZ9707S-7?

DDZ9707S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDZ9707S-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 DDZ9707S-7?

For technical support, including DDZ9707S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9707S-7 requirements.

6.How does Aetrix verify that DDZ9707S-7 is sourced from the original manufacturer or authorized distributors?

All DDZ9707S-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 DDZ9707S-7 meets industry standards.

7.What is the process for return or replacement of DDZ9707S-7?

All DDZ9707S-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9707S-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 DDZ9707S-7 part is unused and in its original packaging.

Return procedure for DDZ9707S-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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