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onsemi 1N965B_T50R
- Part No.:
- 1N965B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N965B_T50R.pdf
- Description:
- DIODE ZENER 15V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,740
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Product details
Overview
1N965B_T50R from Fairchild Semiconductor is a 15 V, 5% tolerance, 500 mW DO-35 glass-case Zener diode used for precision voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection. It exhibits 8.5 Ω dynamic impedance at 16 mA, 0.25 μA reverse leakage at 12.2 V, and operates from –65°C to +200°C.
For engineers reviewing the 1N965B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal stability across industrial temperature range, low dynamic impedance for tight regulation, cathode-band polarity marking, and DO-35 leaded package compatibility with through-hole PCB assembly.
Technical Context
This device functions as a two-terminal voltage reference where reverse-biased breakdown provides stable DC voltage clamping. Its 15 V nominal zener voltage is specified at 16 mA test current, with 8.5 Ω dynamic impedance (ZZ) measured at 1.6 mA AC superimposed on DC bias - confirming low noise and high regulation fidelity under small-signal conditions.
The DO-35 glass package enables hermetic sealing and high-temperature operation up to +200°C junction temperature. Reverse leakage remains ≤0.25 μA at VR = 12.2 V (82% of VZ), supporting low-power standby circuits and battery-backed systems requiring minimal quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 15 V ±5% at IZ = 16 mA - defines primary regulation point for feedback and reference use |
| ZZ (Dynamic Impedance) | 8.5 Ω at IZ = 16 mA - ensures <150 mV output deviation for ±10 mA load variation |
| IR @ VR | ≤0.25 μA at 12.2 V - enables microamp-level standby current in always-on monitoring circuits |
| PD (Max Power) | 500 mW @ TL ≤ 75°C - supports continuous operation in compact, non-heatsinked designs |
| TJ Range | –65°C to +200°C - qualified for under-hood automotive, industrial control, and aerospace environments |
| Package | DO-35 glass case with cathode band - provides hermeticity, thermal robustness, and standard axial-leaded mounting |
Pinout & Package
DO-35 glass axial-leaded package: anode and cathode terminals defined by cathode band marking; no internal leads or pads - direct soldering to through-hole PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common when used in shunt regulator configuration |
| Cathode | Zener breakdown terminal / Regulated output node | Marked with color band; supplies stable 15 V to load when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables single-supply voltage reference without post-assembly trimming in cost-sensitive instrumentation |
| Low ZZ (8.5 Ω) | Minimizes output voltage drift under varying load currents - critical for ADC reference and op-amp biasing |
| Hermetic DO-35 glass package | Prevents moisture ingress and parameter shift over time in humid or high-reliability environments |
| Wide TJ range (–65°C to +200°C) | Supports deployment in engine control units, downhole tools, and military-grade power supplies |
Applications
| Automotive Engine Control Unit (ECU) Voltage Reference | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Stabilizing 5 V or 12 V rail references for microcontroller ADCs and sensor signal conditioning in under-hood ECU modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 15 V clamp for op-amp bias networks and DAC output buffers. Use Value: Maintains <±1% reference accuracy across –40°C to +150°C ambient due to low TC and hermetic packaging. | Use Scenario: Protecting 4–20 mA current loop input stages from transient overvoltage events in factory-floor programmable logic controllers. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input voltage to safe levels before signal conditioning amplifiers. Use Value: Absorbs 500 mW surge energy without degradation, leveraging DO-35 thermal mass and low IR for minimal leakage-induced offset. |
| Medical Infusion Pump Power Supply Feedback | Telecom Line Card Bias Reference |
Use Scenario: Providing regulated 15 V feedback to isolated flyback controller ICs in battery-operated infusion pump power supplies. IC Role / Device Role / Timing Role: Secondary-side voltage reference enabling ±2% output regulation without optocoupler compensation. Use Value: Low 0.25 μA leakage preserves battery life during standby; 200°C max TJ supports sealed enclosure thermal design. | Use Scenario: Generating stable bias voltages for RF front-end LNAs and clock buffer ICs on telecom line cards operating in controlled-temperature cabinets. IC Role / Device Role / Timing Role: Precision DC reference source for active bias networks requiring low noise and long-term stability. Use Value: 8.5 Ω ZZ reduces ripple coupling into sensitive analog paths; DO-35 mechanical reliability supports high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, 1 W rating, DO-41 package, ±5% tolerance | Higher power handling but larger footprint; less suitable for space-constrained PCBs | Select when >500 mW dissipation or higher surge immunity is required |
| BZX55C15 | 15 V nominal, ±5%, 500 mW, DO-35, but tighter ZZ spec (≤30 Ω typical) | Lower production consistency in ZZ vs. 1N965B_T50R's documented 8.5 Ω max | Prefer for cost-sensitive consumer designs where absolute ZZ control is secondary |
Compared with 1N4744A and BZX55C15, the 1N965B_T50R delivers superior dynamic impedance control (8.5 Ω max) in the industry-standard DO-35 form factor, making it optimal for precision analog feedback where regulation error budget is sub-100 mV.
Availability
1N965B_T50R is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog inputs, medical infusion pump power supplies, and telecom line card bias references requiring stable component supply and long-lifecycle support.
Supply support for 1N965B_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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The 1N957B–1N979B series was designed for general-purpose, high-reliability Zener voltage regulation in industrial, automotive, and medical applications demanding wide temperature operation and hermetic packaging.
FAQ
What is the nominal zener voltage and tolerance of the 1N965B_T50R?
The 1N965B_T50R has a nominal zener voltage of 15 V with a tolerance of ±5%, measured at 16 mA test current. This specification ensures predictable regulation performance across production lots and supports use in circuits where reference accuracy within ±0.75 V is required without external trimming.
What is the maximum power dissipation and derating behavior of the 1N965B_T50R?
The 1N965B_T50R 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 - meaning usable power drops to 400 mW at 100°C lead temperature, critical for thermal design in enclosed assemblies.
How is polarity marked on the 1N965B_T50R package?
The 1N965B_T50R uses a cathode band (typically black or dark stripe) on the DO-35 glass body to identify the cathode terminal. The anode is the unmarked end. This marking aligns with JEDEC standards and ensures correct orientation during manual or automated through-hole placement.
What is the reverse leakage current specification for the 1N965B_T50R?
The 1N965B_T50R specifies maximum reverse leakage current of 0.25 μA at VR = 12.2 V (82% of VZ). This ultra-low leakage supports energy-efficient designs such as battery-powered sensors and always-on monitoring circuits where standby current must remain below 1 μA.
Does the 1N965B_T50R meet high-reliability environmental requirements?
Yes, the 1N965B_T50R is qualified for operation from –65°C to +200°C junction temperature and housed in a hermetic DO-35 glass package. These characteristics make it suitable for high-reliability applications including automotive under-hood electronics, downhole oilfield equipment, and military-grade power systems.
1N965B_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N965B_T50R FAQ
1.How can I place an order for 1N965B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N965B_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 1N965B_T50R reliable?
The price and inventory of 1N965B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N965B_T50R is usually 5 days.
3.What payment methods are accepted for 1N965B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N965B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N965B_T50R?
1N965B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N965B_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 1N965B_T50R?
For technical support, including 1N965B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N965B_T50R requirements.
6.How does Aetrix verify that 1N965B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N965B_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 1N965B_T50R meets industry standards.
7.What is the process for return or replacement of 1N965B_T50R?
All 1N965B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N965B_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 1N965B_T50R part is unused and in its original packaging.
Return procedure for 1N965B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N965B_T50R Tags
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