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onsemi BZX85C15-T50A
- Part No.:
- BZX85C15-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C15-T50A.pdf
- Description:
- DIODE ZENER 15V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
BZX85C15-T50A from onsemi is a 15 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supplies, overvoltage protection circuits, and analog signal conditioning where stable breakdown voltage and low dynamic impedance are required.
For engineers reviewing the BZX85C15-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include its 15 V nominal Zener voltage (14.1–15.6 V range), 15 Ω Zener impedance at 5 mA test current, 0.5 μA max leakage at 11.5 V, 1.2 V forward voltage at 200 mA, and DO-41 mechanical compatibility with standard through-hole PCB layouts.
Technical Context
The BZX85C15-T50A operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, optimized for stable DC voltage reference under regulated current conditions. Its thermal equilibrium Zener voltage measurement follows JEDEC-standard lead temperature (TL = 30°C ±1°C) and 3/8″ lead length protocol.
It features a glass-passivated DO-41 package rated for -65°C to +200°C operating and storage temperature range, with 1.0 W power dissipation at 25°C ambient and 6.67 mW/°C derating above 50°C. The cathode is marked by a color band on the glass body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.1 V min to 15.6 V max at IZ = 5 mA - defines usable regulation window for precision reference design |
| Zener Impedance (ZZ) | 15 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Leakage Current (IR) | 0.5 μA max at VR = 11.5 V - guarantees low standby power loss in high-impedance bias networks |
| Power Dissipation (PD) | 1.0 W at TA = 25°C - supports robust thermal performance in compact linear regulator stages |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - enables predictable conduction behavior in dual-direction clamp configurations |
| Operating Temperature | -65°C to +200°C - allows deployment in automotive engine compartments and industrial control enclosures |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering per J-STD-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower-potential node in shunt regulation; carries full load current when regulating |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node; establishes stable reference voltage at this node |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in legacy designs without recalibration of feedback dividers |
| Low Zener impedance (15 Ω) | Maintains <±10 mV output shift across 1–10 mA load current variations in reference circuits |
| DO-41 glass package | Provides hermetic sealing and high reliability for long-life industrial power modules |
| 1.2 V forward voltage | Supports bidirectional clamping when paired with another Zener or diode in series-opposed configuration |
Applications
| Switch-Mode Power Supply Feedback | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Provides precise 15 V reference for optocoupler-based feedback loop in offline AC/DC adapters. IC Role / Device Role / Timing Role: Shunt voltage reference establishing isolated secondary-side regulation threshold. Use Value: Maintains ±1.5% output voltage accuracy across line/load/temperature due to tight VZ tolerance and low ZZ. |
Use Scenario: Generates clean reset signal for 3.3 V microcontrollers during brown-out events. IC Role / Device Role / Timing Role: Zener-clamped voltage divider setting threshold for external reset supervisor IC. Use Value: Ensures reliable reset assertion at 11.5 V (77% of VZ) with sub-μA leakage preserving battery life. |
| Industrial Sensor Signal Conditioning | Overvoltage Protection Clamp |
Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop pressure transmitters. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output buffering and op-amp biasing. Use Value: Delivers <50 ppm/°C drift contribution to overall sensor accuracy over -40°C to +85°C. |
Use Scenario: Clamps transient surges on 12 V automotive CAN bus lines to protect PHY ICs. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (with series resistor) limiting peak voltage to ≤15.6 V. Use Value: Absorbs 1.0 W surge energy without degradation, validated per ISO 7637-2 Pulse 1/2a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 15 V nominal, ±5%, 1.0 W, DO-41, but ZZ = 14 Ω at 17 mA (vs. 15 Ω at 5 mA) | Higher test current shifts optimal operating point; less suitable for low-current references | Prefer BZX85C15-T50A where regulation stability at 1–5 mA is critical |
| BZX85C15-TR | Same electrical specs, but in tape-and-reel packaging (vs. bulk T50A); identical DO-41 footprint | No functional difference; selected only for automated SMT assembly compatibility | Choose BZX85C15-T50A for manual prototyping or small-batch through-hole production |
Compared with 1N4744A and BZX85C15-TR, the BZX85C15-T50A offers superior low-current regulation stability due to its 5 mA Zener test condition matching typical reference circuit bias points, while maintaining identical mechanical fit and thermal rating for drop-in replacement in legacy DO-41 designs.
Availability
BZX85C15-T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and sensor interface modules requiring stable component supply with consistent parametric performance across manufacturing lots.
Supply support for BZX85C15-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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85C15-T50A belongs to the BZX85C series of general-purpose Zener diodes engineered for cost-sensitive, high-reliability voltage reference and protection functions in mass-produced power conversion and signal conditioning systems.
FAQ
What is the Zener voltage tolerance of the BZX85C15-T50A?
The BZX85C15-T50A has a ±5% Zener voltage tolerance, resulting in a guaranteed breakdown range of 14.1 V to 15.6 V when measured at 5 mA test current and thermal equilibrium conditions. This tolerance is specified per the onsemi datasheet Rev. 2 (October 2017) and applies directly to the BZX85C15-T50A device marking and packaging variant.
Can the BZX85C15-T50A be used in surface-mount designs?
No - the BZX85C15-T50A uses a DO-41 axial glass package with 0.406 mm diameter leads spaced 25.4 mm apart, intended exclusively for through-hole mounting. For surface-mount equivalents, consider the MMBZ5245B (SOT-23, 15 V) or NZ9F15V (SOD-123), but note these differ in power rating, impedance, and thermal profile from the BZX85C15-T50A.
What is the maximum leakage current specification for the BZX85C15-T50A?
The BZX85C15-T50A specifies a maximum leakage current (IR) of 0.5 μA at VR = 11.5 V (77% of nominal VZ). This value is confirmed in the Electrical Characteristics table of the official onsemi datasheet and reflects worst-case behavior at 25°C ambient, critical for low-power bias network integrity.
Does the BZX85C15-T50A have a defined forward voltage rating?
Yes - the BZX85C15-T50A has a maximum forward voltage (VF) of 1.2 V at IF = 200 mA, as stated in the Absolute Maximum Ratings section of the onsemi datasheet. This parameter supports design of bidirectional clamping circuits and validates conduction capability during positive half-cycle transients.
Is the BZX85C15-T50A RoHS compliant and halogen-free?
Yes - the BZX85C15-T50A meets RoHS Directive 2011/65/EU and is halogen-free per onsemi's material declarations. The DO-41 glass package contains no brominated flame retardants or chlorine-based compounds, and the device carries the "Pb-Free" and "Green" markings per onsemi's packaging standards.
BZX85C15-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C15-T50A FAQ
1.How can I place an order for BZX85C15-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C15-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 BZX85C15-T50A reliable?
The price and inventory of BZX85C15-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C15-T50A is usually 5 days.
3.What payment methods are accepted for BZX85C15-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C15-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C15-T50A?
BZX85C15-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C15-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 BZX85C15-T50A?
For technical support, including BZX85C15-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C15-T50A requirements.
6.How does Aetrix verify that BZX85C15-T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C15-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 BZX85C15-T50A meets industry standards.
7.What is the process for return or replacement of BZX85C15-T50A?
All BZX85C15-T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C15-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 BZX85C15-T50A part is unused and in its original packaging.
Return procedure for BZX85C15-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C15-T50A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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onsemi
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