My Inquiry
My Account
Diodes Incorporated DDZ39FS-7
- Part No.:
- DDZ39FS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DDZ39FS-7.pdf
- Description:
- DIODE ZENER 39V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,734
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDZ39FS-7 from Diodes Incorporated is a surface-mount precision Zener diode in SOD323 package, rated for 38.02–39.98 V nominal Zener voltage at 5 mA test current, with 85 Ω maximum Zener impedance and 0.05 µA maximum reverse leakage at 30 V. It delivers stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the DDZ39FS-7 datasheet, DDZ39FS-7 pinout, DDZ39FS-7 application, or DDZ39FS-7 equivalent, key selection criteria include Zener voltage tolerance (±2.5%), thermal coefficient (~0.08%/°C), low leakage (<50 nA), SOD323 footprint compatibility, and 200 mW power dissipation capability under standard PCB layout.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain precise DC voltage regulation. Its sharp knee characteristic and tight VZ tolerance (±2.5% at 5 mA) enable high-accuracy referencing in feedback networks and voltage clamping circuits.
Designed for automated SMT assembly, it features matte tin–annealed terminals, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 mold compound. Thermal resistance is 625°C/W (junction-to-ambient) on FR-4 with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 38.02–39.98 V @ IZT = 5 mA - defines stable regulation range for reference or clamp operation |
| Zener Impedance (ZZT) | ≤85 Ω @ 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.05 µA @ VR = 30 V - enables ultra-low quiescent current in battery-powered sensing nodes |
| Power Dissipation (PD) | 200 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Package | SOD323 - 1.30 mm × 1.70 mm footprint compatible with high-density routing and reflow soldering |
| Temperature Coefficient | ~0.08 %/°C (typ.) - provides predictable VZ drift across –65°C to +150°C operating range |
Pinout & Package
Package: SOD323 - surface-mount plastic case with cathode band marking; dimensions: 1.30 mm (D) × 1.70 mm (E) × 0.30 mm (L); weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stable output voltage when reverse-biased; marked by visible cathode band on package |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables clean transition into regulation with minimal voltage hysteresis during turn-on |
| Tight VZ tolerance (±2.5%) | Reduces need for post-production trimming in precision voltage monitor designs |
| Low leakage (<50 nA) | Maintains accuracy in high-impedance bias networks and energy-harvesting circuits |
| Lead-free & halogen-free | Complies with RoHS 2 and JEDEC green standards without compromising thermal performance |
Applications
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Reference |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 16-bit ADC front-end in temperature transmitter modules. IC Role / Device Role / Timing Role: Precision voltage reference source for op-amp biasing and ratiometric scaling. Use Value: ±2.5% VZ tolerance and <50 nA leakage ensure ≤0.01% full-scale error contribution at 25°C. |
Use Scenario: Providing feedback voltage to TL431-based isolated flyback controller in 24 V industrial PSU. IC Role / Device Role / Timing Role: Secondary-side Zener clamp defining output voltage setpoint via optocoupler bias network. Use Value: 85 Ω ZZT minimizes load-induced drift, maintaining ±1% output regulation across line/load variations. |
| Overvoltage Protection Clamp | Low-Power MCU Reset Circuit |
|
Use Scenario: Protecting 3.3 V I/O pins against transient surges up to 40 V in PLC digital input modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy to ground before damage threshold. Use Value: Sharp breakdown onset at 38.02 V ensures clamping begins before downstream ESD diodes activate. |
Use Scenario: Generating reliable reset threshold for ARM Cortex-M0+ microcontroller in battery-backed metering device. IC Role / Device Role / Timing Role: Voltage supervisor element triggering POR logic when main rail drops below 3.3 V. Use Value: Stable 39 V Zener point allows accurate resistor-divider scaling to 3.3 V ±1%, independent of temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C39LT1G | 38.0–42.0 V range (±5%), 100 Ω ZZT, SOT-23 package (larger footprint) | Higher VZ tolerance and impedance reduce accuracy in precision references | Preferred where board space allows SOT-23 and cost is prioritized over regulation tightness |
| MMSZ5245B-7-F | 37.0–39.0 V range (±5%), 100 Ω ZZT, SOD-123 package (0.1 mm taller, different pad layout) | Looser tolerance and higher thermal resistance (700°C/W) limit stability in thermally constrained layouts | Acceptable for non-critical biasing where SOD-123 is already standardized in BOM |
Compared with BZX84-C39LT1G and MMSZ5245B-7-F, DDZ39FS-7 offers tighter voltage tolerance (±2.5% vs. ±5%), lower dynamic impedance (85 Ω vs. ≥100 Ω), and optimized thermal performance in SOD323-making it preferable for high-accuracy, space-constrained voltage reference designs.
Availability
DDZ39FS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, DC-DC converter feedback reference, and overvoltage protection clamp applications requiring stable component supply and long-term manufacturing continuity.
Supply support for DDZ39FS-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, industry-qualified components for automotive, industrial, and computing markets.
DDZ39FS-7 belongs to the DDZxxS series of precision Zener diodes engineered for stable voltage referencing in space-constrained, high-accuracy analog systems-emphasizing low leakage, tight tolerance, and robust SMT manufacturability.
FAQ
What is the maximum power dissipation for DDZ39FS-7 under standard PCB conditions?
DDZ39FS-7 has a rated power dissipation of 200 mW when mounted on an FR-4 PCB using Diodes Incorporated's recommended SOD323 pad layout. Derating begins above +25°C ambient per the published curve: at +85°C, maximum allowable power drops to approximately 120 mW to maintain junction temperature within –65°C to +150°C limits.
How does the Zener voltage tolerance affect circuit accuracy in a feedback divider?
With a ±2.5% VZ tolerance (38.02–39.98 V), the absolute reference uncertainty contributes directly to output voltage error in resistor-divider configurations. For a typical 3.3 V regulator using 10 kΩ/100 kΩ feedback, this translates to ±0.08 V output variation-critical in applications demanding better than ±1% regulation.
Is DDZ39FS-7 suitable for use in automotive-grade designs?
DDZ39FS-7 is not AEC-Q200 qualified and lacks automotive-specific screening or extended temperature validation beyond its rated –65°C to +150°C operating range. While its electrical specs meet many automotive subsystem requirements, formal qualification requires additional testing per AEC-Q200 Rev D, which Diodes Incorporated does not list for this part number.
Can DDZ39FS-7 replace a 39 V Zener in a legacy through-hole design?
No-DDZ39FS-7 uses SOD323 surface-mount packaging and cannot be substituted for axial-lead or DO-35 through-hole Zeners without PCB redesign. Its cathode-band polarity and 1.3 mm × 1.7 mm footprint require matching SMT pads and reflow process control, not hand-soldering or socket adaptation.
DDZ39FS-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):
- 39 V
- Tolerance:
- ±3%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 85 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30 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-323
DDZ39FS-7 FAQ
1.How can I place an order for DDZ39FS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ39FS-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 DDZ39FS-7 reliable?
The price and inventory of DDZ39FS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ39FS-7 is usually 5 days.
3.What payment methods are accepted for DDZ39FS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ39FS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ39FS-7?
DDZ39FS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ39FS-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 DDZ39FS-7?
For technical support, including DDZ39FS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ39FS-7 requirements.
6.How does Aetrix verify that DDZ39FS-7 is sourced from the original manufacturer or authorized distributors?
All DDZ39FS-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 DDZ39FS-7 meets industry standards.
7.What is the process for return or replacement of DDZ39FS-7?
All DDZ39FS-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ39FS-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 DDZ39FS-7 part is unused and in its original packaging.
Return procedure for DDZ39FS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ39FS-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…
