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onsemi 1N966B_T50R
- Part No.:
- 1N966B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N966B_T50R.pdf
- Description:
- DIODE ZENER 16V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:9,141
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Product details
Overview
1N966B_T50R from Fairchild Semiconductor is a 5% tolerance, 16 V nominal Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, operating from –65°C to +200°C, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the 1N966B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include verified Zener voltage (15.2–16.8 V), dynamic impedance (19 Ω at 5 mA), leakage current (0.25 μA at 12.2 V), maximum Zener current (5 mA), and DO-35 thermal and mechanical constraints.
Technical Context
The 1N966B_T50R operates as a two-terminal voltage-regulating diode with sharp reverse-breakdown characteristics. Its Zener voltage is specified at 5 mA test current (IZ), with typical value 16 V and min/max bounds of 15.2 V and 16.8 V respectively, and dynamic impedance measured at 19 Ω under same IZ condition.
It exhibits low leakage (IR = 0.25 μA at VR = 12.2 V), supports stable regulation across –65°C to +200°C junction temperature range, and follows standard DO-35 glass axial package thermal limits: 500 mW at lead temperature ≤ 75°C, derated linearly at 4.0 mW/°C above that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2 V (min) to 16.8 V (max) at IZ = 5 mA - defines usable regulation window for reference or clamp design |
| Zener Impedance (ZZ) | 19 Ω at IZ = 5 mA - determines output voltage stability under load variation |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling with 3/8″ lead length |
| Leakage Current (IR) | 0.25 μA @ VR = 12.2 V - ensures minimal error current in high-impedance bias/reference networks |
| Operating Temp Range | –65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments |
| Tolerance | ±5% - specifies initial calibration accuracy without post-selection or trimming |
| Package | DO-35 glass axial - provides hermetic sealing, known thermal resistance, and industry-standard footprint |
Pinout & Package
DO-35 glass axial package: cylindrical glass body with two tinned copper alloy leads; cathode identified by single black band; total length ≈ 4.4 mm, body diameter ≈ 1.8 mm; leads 25 mm minimum length, 0.46 mm diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward-biased terminal / low-voltage side | Connected to lower potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal / high-voltage side | Marked with black band; connected to higher potential node to enable controlled reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage | 16 V nominal with ±5% tolerance ensures predictable clamping level in protection circuits |
| Low dynamic impedance | 19 Ω at 5 mA minimizes output voltage shift under varying load currents |
| Hermetic glass package | DO-35 construction guarantees long-term parameter stability and moisture resistance |
| Wide temperature operation | –65°C to +200°C rating supports deployment in extreme ambient conditions without derating penalties |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Reference Supply |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Zener diode providing fixed 16 V reference to op-amp bias network and ADC reference divider. Use Value: Maintains <±0.5% reference drift over –40°C to +125°C ambient due to tight 5% VZ tolerance and low ZZ. | Use Scenario: Clamping transient spikes on 12 V supply rail in engine control units during load dump events. IC Role / Device Role / Timing Role: Overvoltage protection device shunting excess energy to ground when rail exceeds 16.8 V. Use Value: Limits peak rail voltage to safe level using fast reverse-breakdown response and 500 mW surge capability. |
| Medical Portable Instrument Power Rail | Telecom Line Interface Protection |
Use Scenario: Generating stable bias for low-noise instrumentation amplifiers in battery-powered patient monitors. IC Role / Device Role / Timing Role: Precision voltage reference element in discrete LDO pre-regulator stage. Use Value: Delivers <10 μV RMS noise contribution and sub-μA leakage to preserve signal integrity and battery life. | Use Scenario: Protecting RS-485 transceiver inputs against induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary clamping diode in multi-stage TVS front-end, placed before series impedance. Use Value: Activates at 15.2 V to divert surge current before downstream IC damage occurs, leveraging DO-35 robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, 1 W rating, DO-41 package, 20 Ω ZZ at 25 mA | Higher power, higher test current, larger footprint - suited for higher-current regulation | Select when >500 mW dissipation or PCB space allows DO-41 |
| BZX55C16 | 16 V nominal, 500 mW, DO-35, ±5% tolerance, 20 Ω ZZ at 5 mA | Near-identical electrical specs but different marking and manufacturer qualification | Drop-in substitute where BZX55-series sourcing or AEC-Q200 compliance is required |
Compared with 1N966B_T50R, 1N4744A offers higher power but requires layout change for DO-41; BZX55C16 matches voltage, tolerance, and package exactly, enabling direct replacement without circuit or board modification.
Availability
1N966B_T50R is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive ECU reference supply, and medical portable instrument power rail applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N966B_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 family was designed for general-purpose, high-reliability Zener regulation in cost-sensitive, thermally demanding applications across industrial and automotive markets.
FAQ
What is the nominal Zener voltage of the 1N966B_T50R?
The 1N966B_T50R has a nominal Zener voltage of 16 V, with a guaranteed range of 15.2 V to 16.8 V at a test current of 5 mA, per the Fairchild 1N957B–1N979B datasheet Rev. F1. This voltage defines its primary function as a precision shunt regulator or voltage clamp in low-power circuits.
What is the maximum power dissipation rating for the 1N966B_T50R?
The 1N966B_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C, reaching zero dissipation at approximately 200°C lead temperature - matching its maximum storage temperature limit.
What package type does the 1N966B_T50R use?
The 1N966B_T50R uses the DO-35 glass axial package, featuring a hermetically sealed glass body, tinned copper alloy leads, and cathode identification via a single black band. Its compact dimensions (≈4.4 mm length, ≈1.8 mm diameter) support high-density through-hole layouts.
What is the Zener impedance of the 1N966B_T50R and why does it matter?
The 1N966B_T50R has a Zener impedance (ZZ) of 19 Ω at IZ = 5 mA. This value quantifies how much the output voltage changes with load current variation; lower ZZ means tighter regulation, critical for stable reference generation in analog signal chains and precision power supplies.
Is the 1N966B_T50R suitable for automotive applications?
Yes - the 1N966B_T50R is qualified for operation from –65°C to +200°C and packaged in rugged DO-35 glass, making it suitable for under-hood automotive applications such as ECU voltage clamping and sensor reference stabilization, provided system-level surge and lifetime requirements are validated per application.
1N966B_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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 12.2 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N966B_T50R FAQ
1.How can I place an order for 1N966B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N966B_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 1N966B_T50R reliable?
The price and inventory of 1N966B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N966B_T50R is usually 5 days.
3.What payment methods are accepted for 1N966B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N966B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N966B_T50R?
1N966B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N966B_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 1N966B_T50R?
For technical support, including 1N966B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N966B_T50R requirements.
6.How does Aetrix verify that 1N966B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N966B_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 1N966B_T50R meets industry standards.
7.What is the process for return or replacement of 1N966B_T50R?
All 1N966B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N966B_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 1N966B_T50R part is unused and in its original packaging.
Return procedure for 1N966B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N966B_T50R Tags
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MMBZ5240B-7-F
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