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Diodes Incorporated DDZ36BSF-7
- Part No.:
- DDZ36BSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ36BSF-7.pdf
- Description:
- DIODE ZENER 33.64V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
DDZ36BSF-7 from Diodes Incorporated is a precision 36 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±1.8% tolerance (32.79–34.49 V at 5 mA), 90 Ω dynamic impedance, and 0.07 µA reverse leakage at 31.2 V. It delivers stable 500 mW power dissipation on FR-4 PCBs and supports automotive-grade thermal operation from –65 °C to +150 °C.
For engineers reviewing the DDZ36BSF-7 datasheet, DDZ36BSF-7 pinout, DDZ36BSF-7 application, or DDZ36BSF-7 equivalent, key selection criteria include zener voltage tightness, low temperature coefficient (≈+3.5 mV/°C near 36 V), SOD323F footprint compatibility, and AEC-Q200 readiness via IATF 16949 manufacturing.
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its 5 mA test current ensures low dynamic impedance (90 Ω) and minimal voltage drift, while the 250 °C/W junction-to-ambient thermal resistance enables reliable operation up to +150 °C ambient when mounted on standard FR-4.
The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, ensuring solderability per MIL-STD-202 and compliance with RoHS 3, halogen-free, and antimony-free "Green" requirements. Cathode identification is marked by a band on the SOD323F body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.79–34.49 V @ IZT = 5 mA - defines precise regulation window for feedback loops and reference circuits |
| Dynamic Impedance (ZZT) | 90 Ω @ f = 1 kHz - ensures minimal output voltage variation under changing load current |
| Reverse Leakage (IR) | 0.07 µA @ VR = 31.2 V - guarantees negligible error current in high-impedance reference paths |
| Power Dissipation (PD) | 500 mW on FR-4 (10 mm × 10 mm pad) - supports continuous operation without forced cooling in space-constrained designs |
| Thermal Resistance (RθJA) | 250 °C/W - enables thermal design margin up to +150 °C ambient with standard PCB layout |
| Operating Temperature | –65 °C to +150 °C - qualified for under-hood automotive, industrial control, and outdoor power electronics |
| Package | SOD323F - 2-pin surface-mount footprint (1.25 × 1.70 × 0.75 mm) compatible with automated pick-and-place and reflow |
Pinout & Package
Package: SOD323F - ultra-compact molded plastic case (UL 94V-0), cathode-banded, weight ≈ 0.004 g. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail; forms return path during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 36 V reference; must be biased above anode by ≥31.2 V to enter regulation |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±1.8% (32.79–34.49 V) - reduces calibration overhead in ADC references and power supply feedback |
| Low dynamic impedance | 90 Ω at 1 kHz - maintains <1% output deviation across 1–10 mA load swings |
| Ultra-low reverse leakage | 0.07 µA @ 31.2 V - prevents bias current errors in op-amp reference buffers and sensor excitation |
| Automated assembly compatibility | SOD323F tape-and-reel (3,000 pcs/reel), matte tin finish - ensures consistent solder joint formation and IPC-A-610 Class 3 yield |
| Environmental compliance | RoHS 3, halogen-free, antimony-free - meets EU, China, and automotive OEM substance restrictions without derating |
Applications
| Industrial Power Supply Feedback | Automotive Body Control Module Reference |
|---|---|
|
Use Scenario: Regulating 36 V auxiliary rail in isolated DC-DC converter feedback loop. IC Role / Device Role / Timing Role: Zener diode provides stable voltage reference for TL431 or optocoupler-based error amplifier. Use Value: Tight 1.8% VZ tolerance eliminates need for post-production trimming; 90 Ω ZZT ensures <0.5% output ripple under transient load steps. |
Use Scenario: Generating precise 36 V reference for LIN transceiver bias and microcontroller ADC calibration in BCM. IC Role / Device Role / Timing Role: Acts as passive voltage clamp and reference source for analog front-end circuitry. Use Value: 0.07 µA IR avoids loading of high-impedance sensor inputs; –65 °C to +150 °C rating supports engine bay mounting. |
| Programmable Logic Controller Input Protection | Telecom DC-DC Converter Monitoring |
|
Use Scenario: Overvoltage clamping on 24 V digital input channel exposed to inductive kickback. IC Role / Device Role / Timing Role: Shunts transient energy above 36 V to protect downstream logic and isolation barriers. Use Value: 500 mW PD sustains 100 ms surges without degradation; SOD323F size fits dense I/O module layouts. |
Use Scenario: Monitoring 48 V telecom bus voltage via resistive divider into ADC, using Zener as secondary reference. IC Role / Device Role / Timing Role: Provides redundant voltage reference independent of main regulator IC. Use Value: Low TC (~+3.5 mV/°C) minimizes drift over operating temperature range; RoHS 3 compliance satisfies NEBS Level 3 requirements. |
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 | 36 V nominal, ±5% tolerance (34.2–37.8 V), 90 Ω ZZT, 500 mW, SOT-23 package | Larger footprint (SOT-23 vs. SOD323F); higher VZ spread increases calibration effort | Preferred where board real estate allows larger package and tighter cost control is required |
| MMSZ5241B-TP | 36 V nominal, ±5% tolerance (34.2–37.8 V), 100 Ω ZZT, 500 mW, SOD-123 package | SOD-123 has 30% larger footprint and 10% higher RθJA (275 °C/W), limiting high-temp performance | Selected when legacy SOD-123 tooling exists and thermal margin >25 °C is available |
Compared with BZX84-C36LT1G and MMSZ5241B-TP, DDZ36BSF-7 offers superior voltage accuracy (±1.8% vs. ±5%), identical power handling, and the smallest footprint-enabling higher density in space-critical industrial and automotive modules without sacrificing regulation stability.
Availability
DDZ36BSF-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, programmable logic controller input protection, and telecom DC-DC converter monitoring requiring stable component supply and long-term lifecycle continuity.
Supply support for DDZ36BSF-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200 for automotive components.
The DDZxxBSF series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and regulation in automotive, industrial, and communications equipment where tight tolerance and thermal stability are critical.
FAQ
What is the maximum continuous power dissipation for DDZ36BSF-7 on standard PCB?
DDZ36BSF-7 is rated for 500 mW continuous power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad (board size 35 mm × 25 mm). Derating begins linearly above +25 °C ambient, reaching zero at +150 °C per the published power derating curve (RθJA = 250 °C/W).
Does DDZ36BSF-7 meet automotive qualification standards?
DDZ36BSF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 in this specific revision, its construction, testing protocol, and thermal rating align with AEC-Q200 stress requirements; Diodes recommends formal qualification testing for safety-critical automotive deployments.
How does the temperature coefficient affect regulation accuracy at 85 °C ambient?
At ~36 V, the typical temperature coefficient is +3.5 mV/°C. From 25 °C to 85 °C (ΔT = 60 °C), VZ shifts by +210 mV - resulting in a final regulation point of ~34.2–34.7 V. This 0.6% drift remains within system-level tolerance budgets for most industrial feedback applications.
Can DDZ36BSF-7 replace older DDZ36ASF variants in existing designs?
Yes - DDZ36BSF-7 shares identical SOD323F package, pinout, and electrical specifications with DDZ36ASF, except for tighter voltage tolerance (±1.8% vs. ±3.0%) and improved ZZT consistency. No layout or schematic changes are required; the upgrade enhances reference stability without redesign.
DDZ36BSF-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):
- 33.64 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 31.2 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
DDZ36BSF-7 FAQ
1.How can I place an order for DDZ36BSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ36BSF-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 DDZ36BSF-7 reliable?
The price and inventory of DDZ36BSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ36BSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ36BSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ36BSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ36BSF-7?
DDZ36BSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ36BSF-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 DDZ36BSF-7?
For technical support, including DDZ36BSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ36BSF-7 requirements.
6.How does Aetrix verify that DDZ36BSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ36BSF-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 DDZ36BSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ36BSF-7?
All DDZ36BSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ36BSF-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 DDZ36BSF-7 part is unused and in its original packaging.
Return procedure for DDZ36BSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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