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onsemi BZX55C10_T26A
- Part No.:
- BZX55C10_T26A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C10_T26A.pdf
- Description:
- DIODE ZENER 10V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,596
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Product details
Overview
BZX55C10_T26A from ON Semiconductor (formerly Fairchild) is a 10 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 15 Ω dynamic impedance at 5 mA test current and 0.1 μA maximum reverse leakage at 7.5 V. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the BZX55C10_T26A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode identification via color band, and compatibility with through-hole PCB layouts requiring stable 10 V clamping or biasing.
Technical Context
The BZX55C10_T26A operates as a silicon planar Zener diode optimized for voltage regulation and overvoltage protection in DC circuits. Its 10 V nominal breakdown 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.
Thermal performance is defined by 4.0 mW/°C derating above 75°C lead temperature, and its DO-35 glass package ensures hermetic sealing and reliable long-term stability under industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.6 V at IZ = 5 mA; defines precise clamping threshold for 10 V reference designs |
| Tolerance | ±5%; ensures predictable voltage accuracy without post-selection trimming |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C; supports continuous operation in compact through-hole layouts |
| Dynamic Impedance (ZZ) | 15 Ω @ IZ = 5 mA; limits output voltage variation under load changes |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 7.5 V; minimizes standby current in battery-powered circuits |
| Operating Temp Range | -65°C to +200°C; enables use in automotive under-hood and industrial control environments |
| Forward Voltage (VF) | ≤1.3 V @ IF = 100 mA; allows bidirectional ESD protection when used with series resistor |
Pinout & Package
DO-35 glass axial package with cathode identified by single black color band. Leads are tinned copper-clad steel, suitable for wave or hand soldering. No polarity-sensitive mounting orientation beyond cathode band alignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; negative terminal in reverse (Zener) operation | Connected to lower-potential node when regulating; forms current path during clamping |
| Cathode | Negative terminal in forward bias; positive terminal in reverse (Zener) operation | Marked with black band; connected to higher-potential node for voltage reference or overvoltage clamp |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Eliminates need for binning or external calibration in cost-sensitive 10 V reference designs |
| Hermetically sealed DO-35 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| Low 0.1 μA leakage at 7.5 V | Reduces quiescent power loss in always-on monitoring circuits and battery backup systems |
| 4.0 mW/°C thermal derating above 75°C | Enables predictable power handling in thermally constrained enclosures without forced cooling |
| 15 Ω dynamic impedance at 5 mA | Maintains tight regulation (<±15 mV) across ±1 mA load current variation |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 10 V reference for linear regulator feedback or ADC reference divider networks. IC Role / Device Role / Timing Role: Precision voltage reference element establishing regulated bias point. Use Value: Delivers ±5% accuracy without trimming, supporting repeatable analog signal conditioning across production batches. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 10 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground during ESD or inductive kick events. Use Value: Limits voltage excursion to ≤10.6 V with <0.1 μA leakage, preserving signal integrity and IC reliability. |
| Voltage Monitor Threshold | Current Source Bias |
Use Scenario: Detecting undervoltage or overvoltage conditions in 12 V rail monitoring circuits using comparator input. IC Role / Device Role / Timing Role: Stable threshold generator defining trip point for supervisor ICs or discrete comparators. Use Value: Maintains 9.5–10.6 V switching window across -65°C to +200°C, enabling robust fault detection in automotive modules. | Use Scenario: Setting bias current for op-amp input stages or transistor amplifiers via constant-current sink configuration. IC Role / Device Role / Timing Role: Two-terminal current regulator leveraging Zener's stable dynamic impedance. Use Value: Provides ~5 mA bias with <15 mV variation under supply ripple, improving amplifier PSRR and offset stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | Same 10 V nominal, ±5% tolerance, but rated 1 W in DO-41 package; higher power capability | Preferred where >500 mW surge handling or longer thermal time constants are required | Select BZX55C10_T26A for space-constrained DO-35 layouts; choose 1N4740A for higher-power dissipation needs |
| MMBZ5240BLT1G | Surface-mount SOD-123 package, same 10 V/±5%, 225 mW rating; smaller footprint, lower thermal mass | Suitable for high-density PCBs where through-hole assembly is not feasible | Choose BZX55C10_T26A for legacy through-hole designs; MMBZ5240BLT1G for modern SMT production |
Compared with 1N4740A and MMBZ5240BLT1G, the BZX55C10_T26A offers optimal balance of precision, hermetic reliability, and axial through-hole compatibility - making it ideal for industrial control boards and repair-replacement scenarios where DO-35 footprint and long-term parameter stability are prioritized.
Availability
BZX55C10_T26A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and threshold detection applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for BZX55C10_T26A 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX55C10_T26A belongs to the legacy BZX55C family of general-purpose Zener diodes designed for cost-effective, reliable voltage regulation and transient suppression in DC power and signal conditioning circuits.
FAQ
What is the exact Zener voltage range for BZX55C10_T26A at 25°C?
The BZX55C10_T26A has a guaranteed Zener voltage range of 9.5 V to 10.6 V when measured at 5 mA test current and 25°C ambient temperature, reflecting its ±5% tolerance specification per the Fairchild/ON Semiconductor datasheet Rev. D1.
Does BZX55C10_T26A have a cathode marking, and how is it identified?
Yes, the BZX55C10_T26A uses a single black color band on the DO-35 glass body to denote the cathode terminal. This marking aligns with JEDEC standards and must be oriented toward the higher-potential node in Zener operation to ensure proper clamping functionality.
What is the maximum reverse leakage current for BZX55C10_T26A, and at what voltage is it specified?
The BZX55C10_T26A specifies a maximum reverse leakage current of 0.1 μA at a reverse voltage (VR) of 7.5 V, measured at 25°C. This low leakage supports energy-efficient operation in battery-backed or always-on monitoring circuits.
Can BZX55C10_T26A be used in surface-mount designs?
No - the BZX55C10_T26A is packaged exclusively in the axial DO-35 glass case and requires through-hole mounting. For surface-mount equivalents, consider the MMBZ5240BLT1G (SOD-123) or NZ9F10V2T5G (SOD-523), both offering 10 V Zener voltage in compatible footprints.
How does thermal derating affect the power handling of BZX55C10_T26A above 75°C?
For every degree Celsius above 75°C lead temperature, the BZX55C10_T26A must be derated by 4.0 mW. At 100°C lead temperature, its usable power dissipation drops to 400 mW (500 mW − [25 × 4.0 mW]), ensuring safe junction temperature operation without forced cooling.
BZX55C10_T26A 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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.5 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
BZX55C10_T26A FAQ
1.How can I place an order for BZX55C10_T26A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C10_T26A 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 BZX55C10_T26A reliable?
The price and inventory of BZX55C10_T26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C10_T26A is usually 5 days.
3.What payment methods are accepted for BZX55C10_T26A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C10_T26A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C10_T26A?
BZX55C10_T26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C10_T26A 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 BZX55C10_T26A?
For technical support, including BZX55C10_T26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C10_T26A requirements.
6.How does Aetrix verify that BZX55C10_T26A is sourced from the original manufacturer or authorized distributors?
All BZX55C10_T26A 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 BZX55C10_T26A meets industry standards.
7.What is the process for return or replacement of BZX55C10_T26A?
All BZX55C10_T26A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C10_T26A, 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 BZX55C10_T26A part is unused and in its original packaging.
Return procedure for BZX55C10_T26A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C10_T26A Tags
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