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Nexperia USA Inc. BZX79-C27,113
- Part No.:
- BZX79-C27,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C27,113.pdf
- Description:
- DIODE ZENER 27V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
BZX79-C27,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 27 V breakdown voltage at 2 mA test current, 65 Ω typical differential resistance, and 18.0 mV/K temperature coefficient. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits across industrial and consumer electronics.
For engineers reviewing the BZX79-C27,113 datasheet, BZX79-C27,113 pinout, BZX79-C27,113 application, or BZX79-C27,113 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), non-repetitive peak reverse current (1.0 A), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
This Zener diode functions in reverse-biased avalanche mode to maintain stable DC voltage under varying load or input conditions. Its 27 V nominal Zener voltage is specified at IZtest = 2 mA, with 65 Ω typical dynamic impedance ensuring predictable regulation slope and minimal output variation across operating current.
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 precision references. It is rated for 500 mW total power dissipation at Tamb = 50 °C with no metallization pad, 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 stable regulation point for feedback or clamping |
| Differential Resistance (rdif) | 65 Ω typ. at IZ = 2 mA; determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +18.0 mV/K at IZ = 2 mA; quantifies voltage drift per degree rise in junction temperature |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C; sets maximum continuous DC power handling on standard PCB |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A at tp = 100 μs; enables transient overvoltage suppression without failure |
| Reverse Current (IR) | 50 nA max. at VR = 0.7 × VZnom; ensures low leakage in high-impedance reference nodes |
| Junction-to-Ambient Thermal Resistance (Rth j-a) | 380 K/W; governs steady-state temperature rise under DC bias on unmetallized PCB |
Pinout & Package
Hermetically sealed glass SOD27 (DO-35) axial-leaded package with cathode indicated by a dark band. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in Zener shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input via series resistor; provides stable 27 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not required (e.g., non-critical biasing) |
| 500 mW power rating in DO-35 package | Supports robust operation in space-constrained through-hole designs without heatsinking |
| Low 50 nA reverse leakage at 0.7×VZ | Minimizes error current in high-impedance divider networks and precision reference buffers |
| +18.0 mV/K temperature coefficient | Allows predictable thermal drift modeling for compensation in multi-diode reference strings |
| 40 W non-repetitive surge capability | Provides inherent transient immunity against ESD and line surges in unprotected inputs |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulators using TL431 or discrete op-amp feedback loops. IC Role / Device Role / Timing Role: Zener diode serves as secondary reference or error amplifier bias point to improve loop stability. Use Value: 27 V rating allows direct use in 24 V system rails with 12.5% headroom for transient margin. |
Use Scenario: Protecting GPIO pins from accidental 30 V transients in industrial sensor interfaces. IC Role / Device Role / Timing Role: Shunt clamp activated during overvoltage events to divert current away from sensitive CMOS inputs. Use Value: 1.0 A non-repetitive surge rating absorbs 100 μs spikes without degradation, preserving pin integrity. |
| DC Bias Network for RF Amplifiers | Threshold Detector in Analog Monitoring Circuits |
Use Scenario: Setting gate bias voltage for GaAs FET amplifiers requiring stable 27 V DC operating point. IC Role / Device Role / Timing Role: Provides low-noise, low-drift DC reference independent of supply ripple. Use Value: 65 Ω dynamic impedance minimizes AC coupling into bias network, reducing gain modulation. |
Use Scenario: Triggering comparator alerts when battery voltage exceeds 27 V in 24 V lead-acid systems. IC Role / Device Role / Timing Role: Acts as precision threshold element in window or overvoltage detection circuitry. Use Value: ±5% tolerance ensures trip point remains within 25.6–28.4 V range, compatible with system safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 27 V ±5%, 1.0 W rating, DO-41 package, 35 Ω rdif, −2 mV/K tempco | Higher power handling but larger footprint; negative tempco limits series stacking | Select for higher continuous power needs (>500 mW) where board space permits DO-41 |
| BZX85C27 | 27 V ±5%, 1.3 W rating, DO-41 package, 20 Ω rdif, +10 mV/K tempco | Lower dynamic impedance improves regulation; higher Ptot requires thermal management | Prefer when tighter voltage stability under load variation is required and thermal design accommodates 1.3 W |
Compared with BZX79-C27,113, the 1N4733A offers double the power rating but lacks the DO-35 form factor's compactness, while BZX85C27 delivers superior regulation accuracy and thermal performance at the cost of increased board area and thermal design complexity.
Availability
BZX79-C27,113 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor signal conditioning, and consumer appliance control boards requiring stable component supply with legacy DO-35 footprint compatibility.
Supply support for BZX79-C27,113 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 semiconductors, formed in 2017 from the former NXP Standard Products division, with core expertise in high-volume, high-reliability diodes, MOSFETs, and logic devices.
The BZX79 series belongs to Nexperia's legacy Zener diode portfolio designed specifically for cost-sensitive, space-constrained voltage reference and protection applications in industrial and consumer electronics.
FAQ
What is the maximum continuous reverse current this diode can handle at 27 V?
The BZX79-C27,113 is not rated for continuous reverse current at full Zener voltage. Its maximum continuous power dissipation is 500 mW at 50 °C ambient, limiting sustained reverse current to approximately 18.5 mA (500 mW ÷ 27 V). Exceeding this risks thermal runaway due to its 380 K/W junction-to-ambient resistance.
Can this diode be used in series to achieve higher reference voltages?
Yes - multiple BZX79-C27,113 diodes may be connected in series to generate higher reference voltages (e.g., 54 V with two units), but temperature coefficients (+18.0 mV/K each) accumulate linearly, increasing total drift. Series combinations also require matched units to avoid current hogging due to VZ tolerance spread.
Is the DO-35 package RoHS compliant and lead-free?
Yes - Nexperia's BZX79-C27,113 in SOD27 (DO-35) packaging meets RoHS Directive 2011/65/EU and is lead-free, with termination finish specified as matte tin (Sn) on copper leads. Full compliance documentation is available under Nexperia product number 9397 750 09387.
How does the 2 mA Zener test current affect circuit design?
The 27 V rating is guaranteed only at IZ = 2 mA; operation below 0.5 mA increases dynamic impedance and reduces regulation accuracy. Designers must size the series resistor to ensure ≥2 mA flows through the diode under minimum input voltage and maximum load conditions to maintain specified VZ.
BZX79-C27,113 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:
- ±5%
- 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-C27,113 FAQ
1.How can I place an order for BZX79-C27,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C27,113 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-C27,113 reliable?
The price and inventory of BZX79-C27,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C27,113 is usually 5 days.
3.What payment methods are accepted for BZX79-C27,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C27,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-C27,113?
BZX79-C27,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C27,113 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-C27,113?
For technical support, including BZX79-C27,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C27,113 requirements.
6.How does Aetrix verify that BZX79-C27,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-C27,113 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-C27,113 meets industry standards.
7.What is the process for return or replacement of BZX79-C27,113?
All BZX79-C27,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C27,113, 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-C27,113 part is unused and in its original packaging.
Return procedure for BZX79-C27,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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