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onsemi 1N960B_T50R
- Part No.:
- 1N960B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N960B_T50R.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,268
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Product details
Overview
1N960B_T50R from Fairchild Semiconductor is a 9.1 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 7.5 mA test current, 14 Ω dynamic impedance, and 0.5 μA reverse leakage at 7.6 V, used for precision voltage regulation in low-power analog reference circuits.
For engineers reviewing the 1N960B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode-band polarity marking, and DO-35 lead-form compatibility with through-hole PCB layouts.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. It exhibits a nominal zener voltage of 9.1 V measured at 7.5 mA (IZ), with dynamic impedance of 14 Ω at that bias point and 35 Ω at knee current (IZK = 0.5 mA).
The device supports operation from –65°C to +200°C, with power derating starting above 75°C at 4.0 mW/°C, and is marked with a cathode band on the DO-35 glass case per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at IZ = 7.5 mA - defines regulated output voltage in shunt regulator designs |
| Zener Impedance (ZZ) | 14 Ω at IZ = 7.5 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 0.5 μA at VR = 7.6 V - ensures minimal quiescent current in standby mode |
| Power Dissipation (PD) | 500 mW at TL ≤ 75°C - sets maximum continuous power handling before thermal derating |
| Operating Temperature | –65°C to +200°C - enables use in automotive under-hood and industrial high-temp environments |
| Package | DO-35 glass axial - provides hermetic sealing and standard through-hole mounting |
Pinout & Package
DO-35 glass axial package with cathode identified by a colored band; two-terminal device with no internal circuitry - anode and cathode leads are unidirectional and non-interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node to enable voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables predictable voltage reference without post-production trimming |
| Low ZZ at IZ | 14 Ω ensures <14 mV output shift per 1 mA load change at nominal bias |
| Hermetic DO-35 package | Provides long-term reliability and moisture resistance in harsh environments |
| High TJ max rating | +200°C junction temperature supports operation near heat sources or in sealed enclosures |
Applications
| Industrial Sensor Reference | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Provides stable 9.1 V reference for analog-to-digital converter biasing in temperature and pressure transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision excitation voltage for bridge sensors. Use Value: Tight 5% VZ tolerance and low 14 Ω impedance minimize measurement drift across temperature. | Use Scenario: Clamps transient overvoltage on 12 V supply rail in engine control units during load dump events. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy via controlled reverse breakdown. Use Value: 500 mW rating and –65°C to +200°C range ensure survivability in under-hood thermal cycling. |
| Low-Power IoT Node Regulator | Legacy Power Supply Feedback |
Use Scenario: Generates local 9.1 V rail for microcontroller reset supervisor ICs in battery-powered edge devices. IC Role / Device Role / Timing Role: Passive shunt regulator maintaining threshold voltage for brown-out detection. Use Value: 0.5 μA IR at 7.6 V minimizes standby current drain, extending battery life. | Use Scenario: Sets feedback voltage for TL431-based adjustable linear regulators in legacy AC/DC adapters. IC Role / Device Role / Timing Role: Precision voltage divider component defining output setpoint accuracy. Use Value: Matched VZ tolerance and stable ZZ support ±1% output regulation over line/load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | 9.1 V ±5%, 1 W rating, DO-41 package, 10 Ω ZZ at 19 mA | Higher power handling but larger footprint and different thermal profile | Prefer when >500 mW dissipation or PCB space allows DO-41 |
| BZX55C9V1 | 9.1 V ±5%, 500 mW, DO-35, 15 Ω ZZ at 5 mA | Near-identical electrical specs but different manufacturer marking and traceability | Direct functional substitute where Fairchild sourcing is constrained |
Compared with 1N960B_T50R, the 1N4739A offers higher power margin but requires layout revision, while BZX55C9V1 matches form, fit, and function with identical DO-35 packaging and compatible zener characteristics.
Availability
1N960B_T50R is available at Aetrix Electronics and suitable for industrial sensor reference, automotive ECU voltage clamp, and low-power IoT node regulator applications requiring stable component supply and long-lifecycle support.
Supply support for 1N960B_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 1N960B_T50R belongs to the legacy 1N957B–1N979B Zener diode family, designed for general-purpose voltage regulation and transient suppression in cost-sensitive, high-reliability through-hole applications.
FAQ
What is the zener voltage tolerance for 1N960B_T50R?
The 1N960B_T50R has a zener voltage tolerance of ±5% around its nominal 9.1 V rating, measured at 7.5 mA test current and 25°C ambient. This tolerance is guaranteed per the Fairchild 1N957B–1N979B datasheet Rev. F1 and applies to all units within specification. The 1N960B_T50R achieves this consistency via process-controlled doping and post-trim screening.
Does 1N960B_T50R have a specified cathode marking?
Yes, the 1N960B_T50R uses a colored band on the DO-35 glass body to denote the cathode terminal, consistent with JEDEC DO-35 marking standards. The band is located adjacent to the cathode lead and must be oriented toward the higher-potential node in circuit layout. This marking is visible in top-view inspection and confirmed in the Fairchild top-mark information table for 1N960B.
What is the maximum reverse leakage current for 1N960B_T50R?
The maximum reverse leakage current for 1N960B_T50R is 0.5 μA at VR = 7.6 V and TA = 25°C, as specified in the Electrical Characteristics table. This value reflects worst-case leakage under sub-breakdown bias and is critical for low-power applications such as battery-backed supervisors. The 1N960B_T50R maintains this spec across its full operating temperature range.
Can 1N960B_T50R be used in surface-mount designs?
No, the 1N960B_T50R is packaged exclusively in the through-hole DO-35 glass axial format and is not suitable for surface-mount assembly. Its leaded construction requires hole drilling and wave soldering or hand-soldering. For SMT equivalents, consider the BZX55C9V1 in DO-35 variant or SOD-123 packages - but note those are distinct orderables, not drop-in replacements for 1N960B_T50R.
How does thermal derating apply to 1N960B_T50R?
The 1N960B_T50R derates linearly at 4.0 mW/°C above a lead temperature of 75°C, down to zero power at 200°C. This derating is based on measured thermal resistance from junction to leads and must be applied using actual lead temperature (TL), not ambient. Designers must verify TL via thermal modeling or thermocouple measurement to avoid exceeding the 500 mW limit at elevated temperatures.
1N960B_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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7.5 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 6.9 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N960B_T50R FAQ
1.How can I place an order for 1N960B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N960B_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 1N960B_T50R reliable?
The price and inventory of 1N960B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N960B_T50R is usually 5 days.
3.What payment methods are accepted for 1N960B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N960B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N960B_T50R?
1N960B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N960B_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 1N960B_T50R?
For technical support, including 1N960B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N960B_T50R requirements.
6.How does Aetrix verify that 1N960B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N960B_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 1N960B_T50R meets industry standards.
7.What is the process for return or replacement of 1N960B_T50R?
All 1N960B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N960B_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 1N960B_T50R part is unused and in its original packaging.
Return procedure for 1N960B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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