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Nexperia USA Inc. BZX79-B27,113
- Part No.:
- BZX79-B27,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B27,113.pdf
- Description:
- DIODE ZENER 27V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:8,998
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Product details
Overview
BZX79-B27,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 27 V working voltage at 2 mA test current, 65 Ω typical differential resistance, and 18.0 mV/K temperature coefficient. It operates in low-power voltage reference and stabilization circuits, such as power supply feedback networks and precision analog biasing in industrial sensor interfaces.
For engineers reviewing the BZX79-B27,113 datasheet, BZX79-B27,113 pinout, BZX79-B27,113 application, or BZX79-B27,113 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal coefficient (18.0 mV/K), differential resistance (65 Ω), non-repetitive peak reverse current (1.0 A), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
This diode functions as a two-terminal shunt voltage reference, maintaining stable reverse-biased operation at its specified Zener voltage under controlled current conditions. Its 27 V nominal breakdown is defined at IZtest = 2 mA, with differential resistance of 65 Ω (typ.) ensuring predictable regulation slope across load variations.
The device exhibits a positive temperature coefficient of +18.0 mV/K at 2 mA, indicating voltage increases with junction temperature - critical for thermal drift compensation in reference designs. It is rated for 500 mW total power dissipation at Tamb = 50 °C with 8 mm lead length, and supports non-repetitive surge handling up to 40 W for 100 μs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.5–27.5 V at IZ = 2 mA; defines precise regulation point for feedback loops |
| Differential Resistance (rdif) | 65 Ω (typ.), 300 Ω (max); determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +18.0 mV/K at IZ = 2 mA; quantifies voltage drift per degree Celsius rise |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C; sets maximum continuous DC power handling capability |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A at tp = 100 μs; enables transient overvoltage clamping without failure |
| Reverse Current (IR) | 50 nA max. at VR = 0.7 × VZnom; ensures minimal leakage in high-impedance reference nodes |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a band on one end. Leads are tinned copper alloy, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source and load; maintains stable 27 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tight regulation without post-production trimming in cost-sensitive industrial references |
| Low differential resistance (65 Ω typ.) | Minimizes output voltage variation under ±1 mA load current changes in feedback paths |
| Hermetic glass SOD27 package | Provides long-term stability and moisture resistance for automotive and outdoor applications |
| 500 mW power rating at 50 °C ambient | Supports continuous operation in unheated enclosures without forced cooling |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Bias Reference |
|---|---|
Use Scenario: Stabilizing error amplifier reference in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 27 V setpoint to optocoupler input LED. Use Value: Enables ±1% output voltage regulation over line/load/temperature with no external trimming required. |
Use Scenario: Generating stable bias voltage for MEMS pressure sensor signal conditioning circuitry. IC Role / Device Role / Timing Role: Low-drift Zener reference supplying excitation to bridge sensor and ADC reference input. Use Value: Maintains <±0.5% reference accuracy across −40 °C to +125 °C due to known +18.0 mV/K coefficient. |
| Consumer Audio DC-DC Converter Trim | Medical Instrument Calibration Node |
Use Scenario: Fine-tuning output voltage of adjustable buck regulator in portable audio amplifier. IC Role / Device Role / Timing Role: Precision shunt element in resistor divider network feeding voltage-mode controller. Use Value: Achieves 27 V trim point with <0.3% initial error, reducing need for laser-trimmed resistors. |
Use Scenario: Providing traceable voltage reference for self-calibration sequence in portable ECG front-end. IC Role / Device Role / Timing Role: Stable 27 V node used to verify gain/offset of programmable gain amplifier stages. Use Value: Hermetic glass construction ensures <10 ppm/year long-term drift, meeting Class II medical calibration requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | 27 V ±5%, 200 Ω max. rdif, DO-41 package | Higher tolerance and impedance; suited for non-critical biasing only | Select when cost priority outweighs regulation precision and thermal stability |
| BZX84-C27 | 27 V ±5%, SOT-23 surface-mount, 150 mW Ptot | Smaller footprint but lower power and higher tempco (±3.5 mV/K) | Select for space-constrained PCBs where 500 mW dissipation is not required |
Compared with 1N4750A and BZX84-C27, BZX79-B27,113 offers tighter ±2% tolerance, lower 65 Ω differential resistance, and higher 500 mW power handling in a robust DO-35 package - making it optimal for industrial-grade voltage references requiring long-term stability and thermal predictability.
Availability
BZX79-B27,113 is available at Aetrix Electronics and suitable for industrial power supply feedback, automotive sensor bias reference, and medical instrument calibration requiring stable component supply and long-term parametric consistency.
Supply support for BZX79-B27,113 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division.
The BZX79 series belongs to Nexperia's precision Zener voltage regulator portfolio, designed specifically for low-power, high-stability reference and stabilization applications in automotive, industrial, and computing systems.
FAQ
What is the maximum continuous reverse current for reliable operation?
The BZX79-B27,113 is rated for continuous Zener current up to 18.5 mA at 27 V to maintain 500 mW dissipation within safe junction temperature limits. This assumes ambient temperature ≤50 °C and 8 mm lead length; derating is required above that ambient.
How does the +18.0 mV/K temperature coefficient affect circuit design?
A +18.0 mV/K coefficient means the Zener voltage rises ~0.49 V over a 27 °C to 125 °C junction range. Designers must compensate in feedback networks or select complementary components to achieve net zero thermal drift in precision references.
Can this diode be used in parallel for higher power handling?
No - Zener diodes exhibit negative resistance characteristics and cannot be reliably paralleled without individual ballast resistors. For >500 mW applications, use a single higher-rated device or active regulation instead.
Is the SOD27 package compatible with automated through-hole insertion equipment?
Yes - the SOD27 (DO-35) package has standardized 2.54 mm lead spacing and 0.56 mm max. lead diameter, meeting IPC-7351B requirements for axial-leaded components and supporting standard wave soldering and selective soldering processes.
BZX79-B27,113 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
BZX79-B27,113 FAQ
1.How can I place an order for BZX79-B27,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B27,113 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 BZX79-B27,113 reliable?
The price and inventory of BZX79-B27,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B27,113 is usually 5 days.
3.What payment methods are accepted for BZX79-B27,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B27,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B27,113?
BZX79-B27,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B27,113 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 BZX79-B27,113?
For technical support, including BZX79-B27,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B27,113 requirements.
6.How does Aetrix verify that BZX79-B27,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-B27,113 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 BZX79-B27,113 meets industry standards.
7.What is the process for return or replacement of BZX79-B27,113?
All BZX79-B27,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B27,113, 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 BZX79-B27,113 part is unused and in its original packaging.
Return procedure for BZX79-B27,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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