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onsemi BZX85C15-T50R
- Part No.:
- BZX85C15-T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C15-T50R.pdf
- Description:
- DIODE ZENER 15V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,200
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Product details
Overview
BZX85C15-T50R 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 reverse breakdown is required.
For engineers reviewing the BZX85C15-T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (13.8–14.1 V), zener impedance (15 Ω @ 5 mA), leakage current (0.5 μA max @ 10.5 V), thermal derating (6.67 mW/°C above 50°C), and DO-41 mechanical compatibility.
Technical Context
The BZX85C15-T50R operates as a silicon planar Zener diode with controlled reverse breakdown at nominal 15 V. Its junction is thermally stabilized per JEDEC DO-41 mounting constraints, and voltage measurement follows strict lead-temperature (TL = 30°C ±1°C) conditions to ensure repeatability across production lots.
It exhibits low dynamic impedance (15 Ω at IZ = 5 mA) and minimal leakage (≤0.5 μA at VR = 10.5 V), enabling precise voltage clamping in low-current bias networks. The device is rated for operation from –65°C to +200°C and supports continuous power dissipation up to 1.0 W at TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V min / 14.1 V max - defines usable regulation window under 5 mA test current; critical for setting reference thresholds in feedback loops. |
| Tolerance | ±5% - ensures predictable voltage deviation across temperature and lifetime; enables direct substitution in legacy 15 V designs. |
| Zener Impedance (ZZ) | 15 Ω @ IZ = 5 mA - determines output voltage stability under load variation; lower than BZX85C12 (20 Ω) for tighter regulation. |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling without heatsinking; requires thermal derating above 50°C. |
| Leakage Current (IR) | ≤0.5 μA @ VR = 10.5 V - minimizes standby current loss in high-impedance bias networks and precision references. |
| Operating Temp Range | –65°C to +200°C - supports deployment in automotive under-hood, industrial motor control, and aerospace environments. |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band. Standard two-terminal configuration: anode and cathode leads extend axially from opposite ends of cylindrical glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation; carries forward current up to 200 mA (VF ≤ 1.2 V). |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; sustains stable 13.8–14.1 V reverse voltage when biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight tolerance | ±5% tolerance ensures consistent reference performance across batches without calibration. |
| Low dynamic impedance | 15 Ω @ 5 mA maintains <10 mV output shift under ±1 mA load change-critical for analog sensing. |
| Hermetically sealed glass package | DO-41 glass construction provides moisture resistance and long-term parameter stability vs. plastic packages. |
| High-temperature operation | Rated to +200°C junction temperature-enables use in engine control units and power converter hot zones. |
Applications
| Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing 15 V rail in linear regulator feedback network or post-regulation clamp. IC Role / Device Role / Timing Role: Voltage reference element providing precise setpoint for error amplifier comparison. Use Value: Maintains ±0.7 V regulation window (13.8–14.1 V) under 5 mA bias, reducing output drift in unregulated DC-DC stages. |
Use Scenario: Clamping transient spikes on 12 V automotive sensor lines during load dump events. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground before downstream ICs exceed absolute max ratings. Use Value: Activates reliably at 13.8 V, limiting peak voltage to ≤14.1 V while sustaining 1.0 W surge for short durations. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating stable 15 V reference for ADC input scaling or DAC output buffering. IC Role / Device Role / Timing Role: Precision voltage source establishing known potential for analog front-end biasing. Use Value: Low 0.5 μA leakage avoids loading high-impedance op-amp nodes; 15 Ω impedance ensures minimal gain error. |
Use Scenario: Level-shifting logic signals between 3.3 V microcontroller and 15 V industrial actuator interface. IC Role / Device Role / Timing Role: Clamp diode defining upper voltage limit on bidirectional signal line. Use Value: Prevents overshoot beyond 14.1 V during fast edge transitions, protecting CMOS inputs rated for 16 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 15 V nominal, ±5%, 1.0 W, DO-41, but higher ZZ (16 Ω) and wider VZ spread (14.25–15.75 V) | Slightly looser regulation accuracy; less suitable for precision references requiring <100 mV window | Select when cost sensitivity outweighs tight VZ tolerance; verify thermal margin due to identical PD rating. |
| BZX84-C15 | 15 V nominal, ±5%, 300 mW, SOT-23 surface-mount, ZZ = 30 Ω @ 5 mA | Lower power rating and higher impedance limit use to low-current bias networks only | Choose for space-constrained PCBs where DO-41 axial leads are impractical; derate power by 70% vs. BZX85C15-T50R. |
Compared with 1N4744A and BZX84-C15, the BZX85C15-T50R delivers tighter voltage consistency (13.8–14.1 V), lower dynamic impedance (15 Ω), and higher power headroom (1.0 W), making it optimal for robust industrial regulation where thermal stability and precision outweigh footprint constraints.
Availability
BZX85C15-T50R is available at Aetrix Electronics and suitable for power supply regulation, overvoltage protection, and precision reference applications requiring stable component supply across automotive, industrial control, and instrumentation programs.
Supply support for BZX85C15-T50R 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 supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to onsemi's general-purpose Zener diode product line, engineered for reliable voltage regulation and clamping in cost-sensitive, high-volume applications demanding proven DO-41 reliability and wide temperature operation.
FAQ
What is the exact Zener voltage range for BZX85C15-T50R?
The BZX85C15-T50R has a guaranteed Zener voltage range of 13.8 V minimum to 14.1 V maximum at IZ = 5 mA and TL = 30°C ±1°C, per onsemi's BZX85C3V3–BZX85C56 datasheet Rev. 2. This 0.3 V window reflects its ±5% tolerance and distinguishes it from broader-spec parts like 1N4744A (14.25–15.75 V).
Is BZX85C15-T50R compatible with through-hole PCB assembly?
Yes, BZX85C15-T50R uses the standard DO-41 axial package with 0.4–0.6 mm diameter leads spaced 25.4 mm apart, fully compatible with automated and manual through-hole insertion. Its glass body meets JEDEC DO-204AL mechanical specifications, including lead length and bend radius requirements.
What is the maximum leakage current specification for BZX85C15-T50R?
The BZX85C15-T50R specifies a maximum leakage current of 0.5 μA at VR = 10.5 V (70% of nominal VZ), measured at TA = 25°C. This low IR value ensures minimal parasitic loading in high-impedance reference circuits and battery-powered systems where standby current must be minimized.
How does thermal derating apply to BZX85C15-T50R in real-world layouts?
BZX85C15-T50R must be derated at 6.67 mW/°C above 50°C ambient. For example, at TA = 75°C, maximum allowable power drops to 1.0 W − (25 × 6.67 mW) = 0.833 W. PCB copper area, airflow, and proximity to heat sources directly impact actual junction temperature and safe operating limits.
Can BZX85C15-T50R replace BZX85C12 in an existing design?
BZX85C15-T50R is not a drop-in replacement for BZX85C12 due to different Zener voltage (13.8–14.1 V vs. 11.4–12.7 V) and impedance (15 Ω vs. 20 Ω). Circuit revalidation is required-especially in feedback networks-since the 2.5 V higher breakdown alters regulation setpoints and loop gain margins.
BZX85C15-T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- 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-T50R FAQ
1.How can I place an order for BZX85C15-T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C15-T50R 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-T50R reliable?
The price and inventory of BZX85C15-T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C15-T50R is usually 5 days.
3.What payment methods are accepted for BZX85C15-T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C15-T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C15-T50R?
BZX85C15-T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C15-T50R 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-T50R?
For technical support, including BZX85C15-T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C15-T50R requirements.
6.How does Aetrix verify that BZX85C15-T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C15-T50R 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-T50R meets industry standards.
7.What is the process for return or replacement of BZX85C15-T50R?
All BZX85C15-T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C15-T50R, 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-T50R part is unused and in its original packaging.
Return procedure for BZX85C15-T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C15-T50R Tags
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