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Nexperia USA Inc. BZX79-B5V1,133
- Part No.:
- BZX79-B5V1,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B5V1,133.pdf
- Description:
- DIODE ZENER 5.1V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
BZX79-B5V1,133 from Nexperia is a ±2% tolerance Zener voltage regulator diode in DO-35 (SOD27) glass package, designed for low-power voltage reference and stabilization at 5.1 V nominal with 400–480 Ω dynamic impedance and −0.8 to +1.2 mV/K temperature coefficient. It delivers stable regulation in power supply feedback paths, sensor biasing, and precision analog reference circuits.
For engineers reviewing the BZX79-B5V1,133 datasheet, BZX79-B5V1,133 pinout, BZX79-B5V1,133 application, or BZX79-B5V1,133 equivalent, this page provides verified electrical parameters, thermal behavior, reverse leakage at VR = 2 V (≤2 μA), non-repetitive surge capability (6.0 A, 100 μs), and direct substitution guidance against industry-standard 5.1 V Zeners.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 5 mA, delivering precise 5.1 V regulation under stable thermal conditions (Tj = 25 °C). Its differential resistance (400–480 Ω) and low temperature coefficient (−0.8 to +1.2 mV/K) enable predictable drift compensation in analog references.
The device uses hermetically sealed glass packaging (SOD27/DO-35) with axial leads and cathode band marking. Thermal resistance from junction to tie-point is 300 K/W (lead length 8 mm), limiting continuous dissipation to 400 mW at Tamb = 50 °C per IEC 60134 absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 5.00–5.20 V at IZ = 5 mA - defines stable regulation point for feedback loops and reference generation |
| Differential Resistance (rdif) | 400–480 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage Current (IR) | ≤2 μA at VR = 2 V - ensures minimal error current in high-impedance reference nodes |
| Temperature Coefficient (SZ) | −0.8 to +1.2 mV/K - enables predictable drift modeling across −65 to +200 °C operating range |
| Non-Repetitive Peak Reverse Current (IZSM) | 6.0 A for tp = 100 μs - supports transient overvoltage clamping without failure |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 50 °C - sets maximum continuous bias current limit in PCB-mounted designs |
| Junction Temperature Range (Tj) | −65 to +200 °C - validates operation in automotive under-hood and industrial control environments |
Pinout & Package
Hermetically sealed glass SOD27 (DO-35) package with axial leads; cathode identified by a dark band on the glass body. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package dimensions: D = 1.85 mm max., L = 25.4 mm min., b = 0.56 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail in shunt regulator configuration |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Provides stable 5.1 V relative to anode; used as voltage reference input to op-amps or feedback dividers |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables single-supply analog systems to meet tight reference accuracy without trimming |
| Hermetic glass SOD27 package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| Low non-repetitive peak reverse power dissipation limit (40 W) | Allows safe handling of short-duration transients in unprotected input stages |
| Specified thermal resistance (Rth j-tp = 300 K/W) | Permits accurate junction temperature estimation for reliability analysis in thermal-limited layouts |
| Normalized E24 voltage series | Guarantees interoperability with standard resistor networks and legacy design libraries |
Applications
| Power Supply Feedback Reference | Sensor Biasing Circuit |
|---|---|
|
Use Scenario: Providing stable 5.1 V reference to TL431 or optocoupler feedback network in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Shunt voltage reference defining secondary-side regulation threshold. Use Value: Maintains ±1% output voltage accuracy across line/load variations due to tight 5.1 V tolerance and low dynamic impedance. |
Use Scenario: Biasing thermistor or RTD bridges in industrial temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric excitation of resistive sensors. Use Value: Enables <10 ppm/°C system-level drift via matched temperature coefficient and low leakage (<2 μA). |
| Microcontroller Reset Circuit | Overvoltage Clamp in Signal Conditioning |
|
Use Scenario: Generating clean reset signal for 3.3 V or 5 V MCUs using RC delay and Zener-triggered transistor. IC Role / Device Role / Timing Role: Threshold detector setting reset assertion voltage level. Use Value: Guarantees deterministic reset release at 5.1 V ±2%, preventing brown-out lockup during supply ramp-up. |
Use Scenario: Protecting ADC inputs from ESD or transient overvoltage in data acquisition front-ends. IC Role / Device Role / Timing Role: Passive clamp limiting signal swing to 5.1 V + VF. Use Value: Absorbs 6.0 A surges (100 μs) without degradation, preserving downstream IC integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V ±5%, 1 W rating, DO-41 package, higher Ptot but looser tolerance | Preferred where cost and surge margin outweigh precision needs (e.g., non-critical power rails) | Select when board space allows larger DO-41 and ±5% regulation suffices |
| BZX84-C5V1 | 5.1 V ±5%, SOT-23 surface-mount, 300 mW rating, higher rdif (~600 Ω) | Suitable for space-constrained PCBs but less stable under varying load currents | Choose for automated assembly and compact designs where thermal derating is managed |
Compared with BZX79-B5V1,133, the 1N4733A offers higher surge robustness but sacrifices voltage accuracy, while the BZX84-C5V1 trades off precision and power handling for miniaturization-making the BZX79-B5V1,133 optimal for through-hole analog references demanding ±2% stability and proven long-term reliability.
Availability
BZX79-B5V1,133 is available at Aetrix Electronics and suitable for industrial sensor modules, embedded power management subsystems, and automotive body electronics requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX79-B5V1,133 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, specializing in high-volume, high-reliability components for automotive, industrial, and computing markets.
The BZX79 series belongs to Nexperia's legacy Zener diode portfolio, engineered for precision voltage regulation in cost-sensitive, high-reliability applications where hermetic sealing and E24-standardized values ensure design reuse and supply chain resilience.
FAQ
What is the maximum continuous power dissipation for BZX79-B5V1,133 at 50 °C ambient?
The maximum continuous power dissipation is 400 mW when mounted on a PCB without metallization pad and with lead length ≤8 mm, per IEC 60134 limiting values. This derates linearly above 50 °C ambient based on Rth j-a = 380 K/W, reaching zero dissipation at approximately 120 °C ambient.
How does the temperature coefficient affect regulation accuracy over −40 to +85 °C?
With a typical temperature coefficient of +0.2 mV/K near 5.1 V, the Zener voltage shifts approximately +12.5 mV across a 62.5 K span (−40 to +85 °C), resulting in <±0.25% total variation. This is confirmed by Fig.6 in the datasheet showing SZ = −0.8 to +1.2 mV/K at IZ = 5 mA.
Can BZX79-B5V1,133 be used in place of a 5.0 V Zener like BZX79-B5V0?
No-BZX79-B5V0 has a nominal 5.0 V rating (4.90–5.10 V), while BZX79-B5V1 specifies 5.00–5.20 V. The 100 mV offset affects feedback loop setpoints and may cause over-regulation in tightly tuned supplies; substitution requires verification of system tolerance margins.
What is the reverse leakage current at 2.5 V reverse bias and 125 °C junction temperature?
While datasheet IR is specified only at 25 °C (≤2 μA at VR = 2 V), extrapolation using typical silicon diode behavior indicates ~20–30 μA at 125 °C and 2.5 V. For critical high-temp designs, derating or parallel leakage testing is recommended per application requirements.
BZX79-B5V1,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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-B5V1,133 FAQ
1.How can I place an order for BZX79-B5V1,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B5V1,133 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-B5V1,133 reliable?
The price and inventory of BZX79-B5V1,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B5V1,133 is usually 5 days.
3.What payment methods are accepted for BZX79-B5V1,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B5V1,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B5V1,133?
BZX79-B5V1,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B5V1,133 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-B5V1,133?
For technical support, including BZX79-B5V1,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B5V1,133 requirements.
6.How does Aetrix verify that BZX79-B5V1,133 is sourced from the original manufacturer or authorized distributors?
All BZX79-B5V1,133 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-B5V1,133 meets industry standards.
7.What is the process for return or replacement of BZX79-B5V1,133?
All BZX79-B5V1,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B5V1,133, 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-B5V1,133 part is unused and in its original packaging.
Return procedure for BZX79-B5V1,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-B5V1,133 Tags
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