My Inquiry
My Account
Diodes Incorporated D3Z27BF-7
- Part No.:
- D3Z27BF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
D3Z27BF-7.pdf
- Description:
- DIODE ZENER 26.86V 400MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:3,408
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
D3Z27BF-7 from Diodes Incorporated is a 0.4W surface-mount precision Zener diode with nominal zener voltage 26.86 V (min 26.19 V, max 27.53 V), 40 Ω dynamic impedance at 5 mA test current, and ±1% tolerance on VZ. It delivers stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection for microcontroller I/O rails.
For engineers reviewing the D3Z27BF-7 datasheet, D3Z27BF-7 pinout, D3Z27BF-7 application, or D3Z27BF-7 equivalent, key selection criteria include zener voltage tightness (±1%), thermal resistance (312.5 °C/W), SOD323F package compatibility with high-density PCB layouts, and automotive-grade process traceability under IATF 16949.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ across 26.19–27.53 V at IZT = 5 mA and exhibits a negative temperature coefficient of −18.0 mV/°C. Its low 40 Ω Zener impedance ensures minimal output voltage variation under load transients.
The device uses a planar epitaxial construction in a molded plastic SOD323F package with matte tin–annealed copper alloy leads, rated for −65 °C to +150 °C operation and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.19–27.53 V at 5 mA - enables precise 27 V reference with ±1% initial accuracy |
| Power Dissipation (PD) | 400 mW on FR-4 PCB - supports continuous operation in compact space-constrained designs |
| Zener Impedance (ZZT) | 40 Ω at 5 mA - maintains <100 mV output shift under ±1 mA load change |
| Reverse Current (IR) | 0.05 μA at 21 V - ensures negligible leakage in high-impedance bias networks |
| Thermal Resistance (RθJA) | 312.5 °C/W - requires derating above 25 °C ambient; full power usable only up to ~75 °C board temp |
| Capacitance (CJ) | 17 pF at 0 V - suitable for DC and low-frequency (<1 MHz) regulation, not RF bypass |
Pinout & Package
Package: SOD323F - ultra-compact 2-pin surface-mount package (1.25 mm × 1.70 mm × 0.95 mm), cathode indicated by band marking, compatible with automated pick-and-place and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; defines reference point for VZ measurement |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; delivers stable 26.86 V relative to anode when reverse-biased ≥27.53 V |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±1% (26.19–27.53 V) - eliminates need for post-assembly trimming in voltage reference designs |
| Low dynamic impedance | 40 Ω at 5 mA - reduces output ripple and improves line/load regulation in feedback paths |
| Automated assembly compatibility | SOD323F footprint with J-STD-020 Level 1 moisture rating - supports high-yield SMT production without baking |
| Environmental compliance | Lead-free, halogen-free, antimony-free "Green" compound - meets RoHS 3 (2015/863/EU) and automotive change control requirements |
Applications
| Power Supply Feedback | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Precision voltage reference for optocoupler-based feedback loop in AC/DC adapters. Use Value: ±1% VZ tolerance directly translates to <±1.5% output voltage accuracy without secondary-side compensation. |
Use Scenario: Clamping 3.3 V or 5 V MCU GPIO pins against ESD or transient overvoltage. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) shunt clamp protecting sensitive digital inputs. Use Value: 17 pF capacitance avoids signal integrity degradation on high-speed lines while providing robust 27 V clamping. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Stage |
|
Use Scenario: Providing stable excitation voltage for resistive bridge sensors (e.g., strain gauges). IC Role / Device Role / Timing Role: Low-drift (−18 mV/°C) reference source for ratiometric ADC measurements. Use Value: Temperature coefficient allows predictable drift compensation in firmware, reducing calibration frequency. |
Use Scenario: Level-shifting and overvoltage protection for 24 V DC digital input modules. IC Role / Device Role / Timing Role: Zener clamp in series with current-limiting resistor to protect FPGA or microcontroller inputs. Use Value: 400 mW power rating sustains repeated 30 V transients without degradation, supporting IEC 61000-4-5 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | 27 V nominal, ±5% tolerance, 300 mW PD, SOT-23 package | Higher voltage tolerance and lower power rating limit use in precision references | Select when cost sensitivity outweighs voltage accuracy and board space permits larger SOT-23 footprint |
| MMSZ5260B-7-F | 27 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Larger SOD-123 body increases PCB area; higher power suits higher-current clamping | Prefer for industrial environments requiring >400 mW surge handling where layout density is less constrained |
Compared with BZX84-C27LT1G and MMSZ5260B-7-F, D3Z27BF-7 offers superior voltage accuracy (±1% vs. ±5%), tighter ZZT (40 Ω vs. ≥70 Ω), and smaller SOD323F footprint-making it optimal for space-limited, high-accuracy reference and protection roles.
Availability
D3Z27BF-7 is available at Aetrix Electronics and suitable for power supply feedback, microcontroller I/O protection, industrial sensor conditioning, and PLC input stage designs requiring stable component supply and long-term manufacturability.
Supply support for D3Z27BF-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
D3Z27BF-7 belongs to the D3Z series of precision Zener diodes engineered for high-accuracy voltage regulation and protection in automotive, industrial, and consumer power systems-emphasizing tight tolerance, low impedance, and green packaging compliance.
FAQ
What is the maximum reverse voltage before breakdown for D3Z27BF-7?
The D3Z27BF-7 begins stable Zener breakdown at a minimum of 26.19 V and reaches its upper limit at 27.53 V when tested at 5 mA. Below 26.19 V, reverse leakage remains ≤0.05 μA at 21 V, confirming no significant conduction occurs outside this band.
Can D3Z27BF-7 be used in automotive applications?
Yes-D3Z27BF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes Incorporated provides automotive change control and traceability upon request for qualified programs.
How does the SOD323F package affect thermal performance?
The SOD323F package delivers 312.5 °C/W junction-to-ambient thermal resistance on standard FR-4 PCBs. Full 400 mW dissipation is only viable below 75 °C ambient; above that, linear derating applies per Figure 1 in DS35437 Rev. 10-2.
Is D3Z27BF-7 compatible with lead-free reflow profiles?
Yes-D3Z27BF-7 uses matte tin–annealed copper alloy leads and complies with JEDEC J-STD-020 moisture sensitivity Level 1. It withstands peak reflow temperatures up to 260 °C and is fully compatible with standard Pb-free SAC305 profiles.
D3Z27BF-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):
- 26.86 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
D3Z27BF-7 FAQ
1.How can I place an order for D3Z27BF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for D3Z27BF-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 D3Z27BF-7 reliable?
The price and inventory of D3Z27BF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D3Z27BF-7 is usually 5 days.
3.What payment methods are accepted for D3Z27BF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D3Z27BF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D3Z27BF-7?
D3Z27BF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D3Z27BF-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 D3Z27BF-7?
For technical support, including D3Z27BF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D3Z27BF-7 requirements.
6.How does Aetrix verify that D3Z27BF-7 is sourced from the original manufacturer or authorized distributors?
All D3Z27BF-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 D3Z27BF-7 meets industry standards.
7.What is the process for return or replacement of D3Z27BF-7?
All D3Z27BF-7 units undergo pre-shipment inspection (PSI). If there is an issue with D3Z27BF-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 D3Z27BF-7 part is unused and in its original packaging.
Return procedure for D3Z27BF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
D3Z27BF-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…
