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Diodes Incorporated DDZ36CSF-7
- Part No.:
- DDZ36CSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ36CSF-7.pdf
- Description:
- DIODE ZENER 34.27V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
DDZ36CSF-7 from Diodes Incorporated is a 0.5W surface-mount precision Zener diode in SOD323F package, delivering tightly regulated 33.4–35.13V zener voltage at 5mA test current, with 75Ω max zener impedance and ±0.07µA reverse leakage at 31.7V, used for voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the DDZ36CSF-7 datasheet, DDZ36CSF-7 pinout, DDZ36CSF-7 application, or DDZ36CSF-7 equivalent, this part supports precision regulation in compact DC-DC converters, industrial sensor signal conditioning, and automotive body control module voltage monitoring where tight VZ tolerance and low thermal resistance (250°C/W) are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 5mA zener test current and 75Ω dynamic impedance ensure minimal voltage deviation during transient load changes.
The device exhibits a positive temperature coefficient above ~5.6V, typical for higher-voltage Zeners, and is characterized for operation from –65°C to +150°C ambient, with power derating beginning at +75°C per the published curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.4–35.13V @ IZT = 5mA - defines precise regulation window for feedback sensing |
| Max Zener Impedance | 75Ω @ f = 1kHz - ensures <±0.375V output shift under ±28mA current step |
| Reverse Leakage Current | ≤0.07µA @ VR = 31.7V - minimizes quiescent error in high-impedance reference paths |
| Power Dissipation | 500mW on FR-4 PCB - supports continuous operation up to 75°C ambient before derating |
| Thermal Resistance | 250°C/W junction-to-ambient - enables thermal design with standard 10mm×10mm copper pad |
| Package | SOD323F - 2.5mm × 1.7mm footprint compatible with automated pick-and-place and reflow |
| Forward Voltage | 0.9V @ IF = 10mA - relevant for polarity-check circuits and reverse-protection configurations |
Pinout & Package
Package: SOD323F - ultra-compact surface-mount plastic package with cathode band marking; dimensions: 2.50mm (He) × 1.70mm (E) × 0.675mm (A), weight ≈ 0.004g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener operation | Required for correct orientation in voltage reference or clamp circuits; solderable matte tin finish over copper alloy |
| Cathode | Current exit terminal in forward bias; connected to higher-potential node in Zener operation | Marked by visible band; must be biased positively relative to anode to achieve breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.6% typical spread (33.4–35.13V) - reduces need for external trimming in 3.3V/5V rail monitors |
| Low thermal resistance | 250°C/W - allows stable regulation without heatsinking in space-constrained industrial controllers |
| Automated assembly compatibility | SOD323F tape-and-reel packaging (3,000 pcs/reel) - optimized for high-speed placement and J-STD-020 Level 1 moisture handling |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb) - meets automotive and medical regulatory requirements |
| Stable high-temp operation | Rated from –65°C to +150°C - suitable for under-hood automotive modules and industrial motor drives |
Applications
| Industrial Power Supply Feedback | Automotive Body Control Module |
|---|---|
|
Use Scenario: Regulating 36V auxiliary rail in programmable logic controller (PLC) power stage. IC Role / Device Role / Timing Role: Zener diode provides stable reference voltage for TL431 shunt regulator feedback network. Use Value: Tight 33.4–35.13V tolerance ensures ±1% output accuracy across temperature, reducing calibration overhead. |
Use Scenario: Overvoltage clamp protecting LIN bus transceiver input in door module ECU. IC Role / Device Role / Timing Role: Clamping transient spikes above 36V to safeguard 5V LDO input stage. Use Value: 75Ω impedance limits clamping voltage overshoot to <36.5V during 100ns pulses, preventing latch-up. |
| Medical Sensor Signal Conditioning | Telecom DC-DC Converter Reference |
|
Use Scenario: Providing excitation voltage reference for 4–20mA current-loop pressure transducer. IC Role / Device Role / Timing Role: Precision Zener sets bias point for op-amp instrumentation amplifier stage. Use Value: ≤0.07µA leakage avoids loading high-impedance sensor bridges, preserving >14-bit measurement linearity. |
Use Scenario: Setting output voltage of isolated flyback converter in base station power management unit. IC Role / Device Role / Timing Role: Zener diode feeds optocoupler feedback path to regulate 48V output rail. Use Value: 250°C/W thermal resistance maintains regulation stability during 70°C ambient operation in sealed enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36LT1G | 36V nominal (34.2–37.8V), 300mW rating, SOT-23 package, 100Ω ZZT | Higher power dissipation margin required; larger footprint incompatible with ultra-dense layouts | Select when board space allows SOT-23 and lower cost is prioritized over tight VZ tolerance |
| MMSZ5245B-TP | 36V nominal (34.2–37.8V), 500mW, SOD-123 package, 100Ω ZZT, ±5% tolerance | Looser voltage tolerance increases system calibration burden; 300°C/W RθJA demands larger copper area | Choose for legacy designs using SOD-123 footprints or where ±5% VZ is acceptable |
Compared with BZX84-C36LT1G and MMSZ5245B-TP, DDZ36CSF-7 delivers tighter voltage tolerance (±2.6% vs. ±5%), lower dynamic impedance (75Ω vs. ≥100Ω), and superior thermal performance (250°C/W vs. ≥300°C/W), making it optimal for high-accuracy, space-constrained applications.
Availability
DDZ36CSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, medical sensor interfaces, and telecom DC-DC converters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ36CSF-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.
This part belongs to the DDZxx(x)SF precision Zener series, engineered for voltage reference and regulation in compact, thermally demanding environments where tight VZ tolerance and low leakage are essential.
FAQ
What is the maximum continuous power dissipation for DDZ36CSF-7 on a standard FR-4 PCB?
The DDZ36CSF-7 is rated for 500mW maximum power dissipation when mounted on an FR-4 PCB with a 10mm × 10mm copper pad and board size of 35mm × 25mm. Derating begins linearly above +75°C ambient, reaching zero power at +150°C per the published derating curve.
How does the zener voltage tolerance affect circuit accuracy in a feedback loop?
With a specified VZ range of 33.4–35.13V at 5mA, the ±2.6% tolerance directly impacts output voltage accuracy in shunt-regulated feedback networks. For a typical 36V output, this translates to ±0.94V variation, which may require gain trimming in high-precision systems but is sufficient for most industrial 3.3V/5V rail monitors.
Is DDZ36CSF-7 qualified for automotive applications per AEC-Q101?
No - while Diodes Incorporated offers AEC-Q101-qualified Zeners in other families (e.g., BZT52-B series), the DDZ36CSF-7 is not specifically qualified to AEC-Q101. It is rated for –65°C to +150°C operation and RoHS 3 compliant, but automotive use requires explicit qualification documentation and PPAP support, which must be confirmed with Diodes' automotive team.
Can DDZ36CSF-7 be used in place of a 36V Zener with looser tolerance in existing designs?
Yes - the DDZ36CSF-7 shares identical SOD323F package, pinout, and power rating with other DDZ36xSF variants, and its 33.4–35.13V range falls within the broader 36V nominal specification. Its lower impedance (75Ω vs. 90Ω for DDZ36DSF) improves regulation under dynamic loads, making it a functional upgrade in most non-automotive applications.
DDZ36CSF-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):
- 34.27 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 75 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 31.7 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
DDZ36CSF-7 FAQ
1.How can I place an order for DDZ36CSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ36CSF-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 DDZ36CSF-7 reliable?
The price and inventory of DDZ36CSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ36CSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ36CSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ36CSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ36CSF-7?
DDZ36CSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ36CSF-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 DDZ36CSF-7?
For technical support, including DDZ36CSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ36CSF-7 requirements.
6.How does Aetrix verify that DDZ36CSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ36CSF-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 DDZ36CSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ36CSF-7?
All DDZ36CSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ36CSF-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 DDZ36CSF-7 part is unused and in its original packaging.
Return procedure for DDZ36CSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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