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Diodes Incorporated BZX84C27T-7-F
- Part No.:
- BZX84C27T-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
BZX84C27T-7-F.pdf
- Description:
- DIODE ZENER 27V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:8,830
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Product details
Overview
BZX84C27T-7-F from Diodes Incorporated is a 27 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 2.0 mA test current with ±1.8 V zener voltage tolerance (25.1–28.9 V), 80 Ω maximum zener impedance at 2 mA, and 0.1 µA maximum reverse leakage at 18.9 V. It provides precision voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the BZX84C27T-7-F datasheet, BZX84C27T-7-F pinout, BZX84C27T-7-F application, or BZX84C27T-7-F equivalent, key selection criteria include zener voltage accuracy at low test current, thermal resistance (833 °C/W), RoHS-compliant matte tin plating, and SOT-523 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device uses planar die construction to ensure stable breakdown characteristics and low temperature coefficient (21.4 to 25.3 mV/°C) across its operating range. Its 150 mW power rating and 833 °C/W junction-to-ambient thermal resistance require careful PCB thermal pad design per Diodes Inc.'s AP02001 layout guidelines.
The 2.0 mA zener test current reflects optimized operation for low-current reference applications, while the 0.5 mA knee current (IZK) and 80 Ω dynamic impedance at IZT support stable regulation under light-load conditions typical in sensor biasing and microcontroller reset circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom/Min/Max) | 27 V / 25.1 V / 28.9 V - defines regulation window for precision 27 V reference generation |
| Power Dissipation | 150 mW - limits continuous DC power handling on standard FR-4 board with recommended pad layout |
| Zener Test Current | 2.0 mA - operating point where VZ and ZZT are specified; enables low-quiescent-current designs |
| Zener Impedance | 80 Ω max @ 2 mA - determines output voltage stability under varying load current |
| Reverse Leakage | 0.1 µA @ 18.9 V - ensures minimal error current in high-impedance reference nodes |
| Thermal Resistance | 833 °C/W - requires thermal-aware PCB layout to maintain TJ < 150 °C at full power |
| Operating Temp | −65 to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOT-523 - ultra-small 3-terminal surface-mount plastic package (1.60 mm × 0.80 mm × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode reference | Connected to lower-potential node; polarity marked on top surface per Diodes Inc. diagram |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated voltage node; carries reverse current during regulation |
| Case / Exposed Pad | Non-electrical mechanical termination | No internal connection; serves only as mechanical anchor and thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in dense portable electronics layouts where board area is constrained to <1.3 mm² |
| Planar die construction | Delivers repeatable breakdown voltage and low parametric drift over temperature and life |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance without solderability compromise |
| "Green" molding compound | Halogen-free encapsulant (for date codes UO and newer) eliminates Sb₂O₃ fire retardants per Diodes Inc. policy |
Applications
| Microcontroller Reset Circuit | Sensor Bias Reference |
|---|---|
Use Scenario: Generating a stable 27 V threshold for brown-out detection in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage reference for comparator input in reset supervisor IC. Use Value: Tight 25.1–28.9 V tolerance ensures reliable reset assertion across temperature and supply variation. | Use Scenario: Providing bias voltage to MEMS pressure sensor bridge requiring stable excitation. IC Role / Device Role / Timing Role: Functions as low-current voltage reference source for Wheatstone bridge excitation. Use Value: 0.1 µA leakage at 18.9 V minimizes offset error in high-impedance sensor interface paths. |
| Low-Power Analog Front-End | Industrial Signal Conditioning |
Use Scenario: Setting reference voltage for 12-bit SAR ADC input scaling in battery-powered IoT node. IC Role / Device Role / Timing Role: Supplies regulated reference to op-amp gain-setting network in analog signal chain. Use Value: 80 Ω zener impedance ensures <0.2% reference deviation under 100 µA load variation. | Use Scenario: Calibrating 4–20 mA transmitter loop voltage compliance in PLC I/O module. IC Role / Device Role / Timing Role: Provides traceable 27 V calibration reference for DAC output stage verification. Use Value: −65 to +150 °C operating range supports uninterrupted calibration in uncontrolled industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5256BT1G | 27 V nominal, 500 mW rating, SOD-123 package, 35 Ω Zzt @ 20 mA | Higher power and larger footprint; suited for higher-current regulation | Select when >150 mW dissipation or improved thermal performance is required |
| BZX84-C27LT1G | 27 V nominal, same SOT-523 package, but 350 mW rating and 30 Ω Zzt @ 5 mA | Higher test current and lower impedance; better regulation under moderate load | Choose when tighter voltage stability at >2 mA load is critical |
Compared with BZX84C27T-7-F, MMSZ5256BT1G offers higher power handling in a larger package, while BZX84-C27LT1G delivers lower dynamic impedance at higher test current-both trade off size or quiescent current for improved regulation fidelity.
Availability
BZX84C27T-7-F is available at Aetrix Electronics and suitable for microcontroller reset circuits, sensor bias references, low-power analog front-ends, and industrial signal conditioning requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C27T-7-F 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.
The BZX84 series belongs to Diodes Inc.'s general-purpose Zener diode product line, designed specifically for compact, cost-effective voltage regulation and reference applications in consumer, computing, and industrial electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX84C27T-7-F?
The BZX84C27T-7-F exhibits a nominal zener voltage of 27 V with guaranteed minimum and maximum values of 25.1 V and 28.9 V respectively at 2.0 mA test current. Breakdown occurs within this range under controlled conditions; operation above 28.9 V risks exceeding power limits unless current is strictly limited by external series resistance.
Can BZX84C27T-7-F be used in place of a 24 V Zener diode?
No-BZX84C27T-7-F is specifically characterized for 27 V regulation and is not interchangeable with 24 V devices like BZX84C24T. Substituting alters reference voltage by >12%, causing functional failure in circuits dependent on precise threshold detection or biasing, such as reset supervisors or ADC references.
Is the SOT-523 package compatible with standard reflow profiles?
Yes-the SOT-523 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Diodes Inc. specifies compatibility with standard Pb-free reflow profiles (peak 260 °C, 20–40 sec), and terminals meet MIL-STD-202 Method 208 solderability requirements.
Does BZX84C27T-7-F have a specified capacitance value?
No specific capacitance is provided in the DS30262 datasheet for BZX84C27T-7-F. Figure 4 shows typical total capacitance vs. nominal zener voltage, estimating ~1.5 pF for 27 V devices, but Diodes Inc. does not guarantee or specify this parameter for the BZX84C27T-7-F variant.
BZX84C27T-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±7%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18.9 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:
- SOT-523
BZX84C27T-7-F FAQ
1.How can I place an order for BZX84C27T-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C27T-7-F 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 BZX84C27T-7-F reliable?
The price and inventory of BZX84C27T-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C27T-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C27T-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C27T-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C27T-7-F?
BZX84C27T-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C27T-7-F 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 BZX84C27T-7-F?
For technical support, including BZX84C27T-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C27T-7-F requirements.
6.How does Aetrix verify that BZX84C27T-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C27T-7-F 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 BZX84C27T-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C27T-7-F?
All BZX84C27T-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C27T-7-F, 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 BZX84C27T-7-F part is unused and in its original packaging.
Return procedure for BZX84C27T-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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