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onsemi BZX55C13_T50A
- Part No.:
- BZX55C13_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C13_T50A.pdf
- Description:
- DIODE ZENER 13V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,383
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Product details
Overview
BZX55C13_T50A from Fairchild Semiconductor is a 13 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 75°C with 26 Ω dynamic impedance at 5 mA test current and 0.1 μA maximum reverse leakage at 10.4 V. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the BZX55C13_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, dynamic impedance at nominal test current, reverse leakage at rated voltage, and DO-35 mechanical compatibility in space-constrained analog designs.
Technical Context
This device operates as a two-terminal voltage reference by exploiting controlled reverse breakdown in a silicon p-n junction. Its 13 V nominal zener voltage is specified at 5 mA test current with ±5% tolerance, and it maintains stable regulation across -65°C to +200°C operating temperature range.
The BZX55C13_T50A exhibits 26 Ω typical dynamic impedance (ZZ) at IZ = 5 mA and supports up to 29 mA maximum zener current (IZM) at 25°C, with power derating of 4.0 mW/°C above 75°C ambient - critical for thermal design in enclosed or high-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4 V min / 14.1 V max at 5 mA - defines usable regulation window under nominal bias |
| Tolerance | ±5% - ensures predictable voltage setpoint without post-selection trimming |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating applies |
| Dynamic Impedance (ZZ) | 26 Ω @ IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 10.4 V - guarantees minimal quiescent current in standby or high-impedance sensing paths |
| Max Zener Current (IZM) | 29 mA @ 25°C - establishes upper limit for safe transient clamping or reference biasing |
| Operating Temp Range | -65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-35 glass axial package with cathode band marking; two-terminal device requiring no external biasing circuitry beyond series current-limiting resistor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to lower potential side in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / Regulated output node | Marked with color band; supplies stable 13 V reference when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct use in cost-sensitive applications without calibration or binning |
| 500 mW power rating | Supports robust voltage clamping in transient suppression and supply rail stabilization |
| 26 Ω dynamic impedance | Minimizes output voltage deviation during small-signal load variations |
| 0.1 μA reverse leakage | Preserves battery life and signal integrity in low-power sensor interfaces |
| DO-35 glass package | Provides hermetic sealing and proven reliability in harsh thermal cycling environments |
Applications
| Voltage Reference for Analog Sensors | Overvoltage Protection in Power Supplies |
|---|---|
Use Scenario: Providing stable excitation voltage to precision RTD or bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing fixed bias point independent of supply ripple. Use Value: Maintains <±0.65 V regulation error over full temperature range, enabling sub-0.1% measurement accuracy. | Use Scenario: Clamping 12 V rail against surge events in automotive body control modules. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy during load dump or ESD transients. Use Value: Limits peak voltage to ≤14.1 V with 29 mA IZM headroom, protecting downstream LDOs and microcontrollers. |
| Signal Level Translation Interface | Low-Power Microcontroller Reset Circuit |
Use Scenario: Biasing level-shifting networks between 3.3 V MCU GPIO and 5 V legacy peripherals. IC Role / Device Role / Timing Role: Passive clamp defining upper logic threshold while sinking leakage current. Use Value: 26 Ω ZZ ensures <0.13 V shift per 5 mA interface current change, preserving noise margin. | Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC delay into reset input. Use Value: 0.1 μA IR prevents capacitor discharge drift, ensuring reliable 100 ms reset hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, same DO-41 package but larger footprint; 20 Ω ZZ at 21 mA | Higher power (1 W), less suitable for space-constrained PCBs | Select when higher surge current capability is required and board area permits DO-41 |
| MMSZ5242B | 12 V nominal, SOD-123 surface-mount; 33 Ω ZZ at 20 mA; 0.1 μA IR | Automated assembly compatible but requires rework for through-hole replacement | Select for new designs targeting pick-and-place efficiency and reduced profile |
Compared with BZX55C13_T50A, the 1N4742A offers higher power handling in a larger axial package, while the MMSZ5242B delivers SMT compatibility at the cost of slightly higher impedance - both require layout or thermal reassessment if substituted.
Availability
BZX55C13_T50A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, signal level translation, and low-power reset circuit applications requiring stable component supply and long-term obsolescence management.
Supply support for BZX55C13_T50A 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
Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; known for high-reliability power and signal conditioning components.
The BZX55 series was developed as a general-purpose, industry-standard Zener diode family targeting cost-effective voltage regulation and protection in consumer, industrial, and automotive electronics.
FAQ
What is the nominal zener voltage and tolerance of the BZX55C13_T50A?
The BZX55C13_T50A has a nominal zener voltage of 13 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 12.4 V and 14.1 V when measured at 5 mA test current and 25°C. This tolerance is factory-trimmed and does not require external calibration. The BZX55C13_T50A maintains this specification across its full operating temperature range.
What is the maximum power dissipation and thermal derating behavior of the BZX55C13_T50A?
The BZX55C13_T50A is rated for 500 mW power dissipation at lead temperature ≤75°C with 3/8" lead length. Above 75°C, it derates linearly at 4.0 mW/°C. At 125°C lead temperature, its usable power drops to 300 mW. This derating curve must be applied in thermal design - the BZX55C13_T50A cannot sustain full power in high-ambient environments without heatsinking or airflow.
What is the dynamic impedance of the BZX55C13_T50A and why does it matter?
The BZX55C13_T50A has a typical dynamic impedance (ZZ) of 26 Ω at 5 mA test current. This parameter quantifies how much the output voltage changes per unit change in current - lower ZZ means better regulation stability under varying load. In practice, a 1 mA load shift causes only ~26 mV variation in regulated voltage, making the BZX55C13_T50A suitable for precision references where ripple rejection matters.
How is the cathode identified on the BZX55C13_T50A package?
The cathode of the BZX55C13_T50A is marked by a distinct color band (typically black or dark stripe) on the DO-35 glass axial package. This band aligns with the cathode terminal, which must be connected to the higher-potential side of the circuit when used in reverse-bias regulation mode. The anode is the unmarked end. Correct orientation is essential - reverse connection results in forward conduction (~1.3 V drop) instead of zener regulation.
What is the reverse leakage current specification for the BZX55C13_T50A and at what voltage is it tested?
The BZX55C13_T50A specifies a maximum reverse leakage current (IR) of 0.1 μA, tested at VR = 10.4 V - which is 80% of its minimum rated zener voltage (12.4 V). This ultra-low leakage ensures minimal parasitic current draw in high-impedance nodes, such as sensor biasing or reset timing circuits. The BZX55C13_T50A maintains this performance up to 125°C, with leakage increasing predictably per datasheet curves.
BZX55C13_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 26 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX55C13_T50A FAQ
1.How can I place an order for BZX55C13_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C13_T50A 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 BZX55C13_T50A reliable?
The price and inventory of BZX55C13_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C13_T50A is usually 5 days.
3.What payment methods are accepted for BZX55C13_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C13_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C13_T50A?
BZX55C13_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C13_T50A 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 BZX55C13_T50A?
For technical support, including BZX55C13_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C13_T50A requirements.
6.How does Aetrix verify that BZX55C13_T50A is sourced from the original manufacturer or authorized distributors?
All BZX55C13_T50A 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 BZX55C13_T50A meets industry standards.
7.What is the process for return or replacement of BZX55C13_T50A?
All BZX55C13_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C13_T50A, 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 BZX55C13_T50A part is unused and in its original packaging.
Return procedure for BZX55C13_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C13_T50A Tags
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Diodes Incorporated
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