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onsemi 1N5995B_T50R
- Part No.:
- 1N5995B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5995B_T50R.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,554
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Product details
Overview
1N5995B_T50R from Fairchild Semiconductor is a 5.89–6.51 V, 5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, designed for precision voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection clamping at ≤200°C junction temperature.
For engineers reviewing the 1N5995B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified Zener voltage range, thermal derating behavior, dynamic impedance at test current, leakage under reverse bias, and validated alternative parts for voltage reference design continuity.
Technical Context
This Zener diode operates in reverse breakdown with tightly controlled VZ (5.89–6.51 V @ IZ = 5 mA), low dynamic impedance (10 Ω @ IZ), and ultra-low knee impedance (1300 Ω @ IZK = 250 µA), enabling stable regulation even under light-load or transient conditions. Its DO-35 glass package ensures hermetic sealing and reliable operation across -65°C to +200°C.
Power dissipation is rated at 500 mW up to 75°C lead temperature, with linear derating of 4.0 mW/°C above that point. Reverse leakage remains ≤1 mA at VR = 4 V, supporting low-current biasing and high-impedance sensing applications without significant error contribution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.89–6.51 V @ IZ = 5 mA - defines precise regulation window for feedback or reference use |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZ) | 10 Ω @ IZ = 5 mA - ensures minimal output voltage variation under load changes |
| Knee Impedance (ZZK) | 1300 Ω @ IZK = 250 µA - indicates sharpness of breakdown onset for low-current stability |
| Reverse Leakage (IR) | ≤1 mA @ VR = 4 V - guarantees negligible current draw in standby or high-Z bias networks |
| Tolerance | ±5% - enables predictable binning and interchangeability within same voltage grade |
| Operating Temp Range | -65°C to +200°C - supports deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no orientation-specific PCB layout beyond standard diode polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential rail when used as shunt regulator |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable voltage referenced to anode; must be biased above anode by ≥VZ |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-35 glass package | Ensures long-term reliability and moisture resistance in harsh environments without conformal coating |
| 5% VZ tolerance | Enables direct substitution within same family without recalibration or trimming in production |
| Low ZZ (10 Ω) | Maintains regulation accuracy under varying load currents typical in op-amp reference or LDO feedback paths |
| High max. junction temperature (+200°C) | Permits use in thermally constrained spaces such as engine control modules or sealed power converters |
| Lead temperature derating (4.0 mW/°C) | Allows accurate thermal design margining for board-level power density planning |
Applications
| Voltage Reference for Op-Amp Circuits | Switching Power Supply Feedback |
|---|---|
Use Scenario: Providing stable bias voltage to instrumentation amplifier input stages or ADC reference dividers in sensor signal conditioning. IC Role / Device Role / Timing Role: Precision DC voltage reference source with minimal drift and noise contribution. Use Value: 5.89–6.51 V range and ±5% tolerance ensure consistent gain scaling and offset correction across production units. |
Use Scenario: Shunt-connected in optocoupler feedback loop of isolated flyback or forward converters to regulate output voltage. IC Role / Device Role / Timing Role: Primary voltage-sensing element setting regulation threshold via TL431 or similar controller. Use Value: Low ZZ (10 Ω) minimizes output voltage deviation during line/load transients, improving cross-regulation. |
| Overvoltage Clamp for Microcontroller I/O | ESD Protection Pre-Regulator Stage |
Use Scenario: Connected between MCU GPIO pin and ground to clamp ESD or surge events exceeding 6.5 V. IC Role / Device Role / Timing Role: Fast-acting shunt limiter absorbing transient energy before IC damage occurs. Use Value: 200°C max operating temperature allows sustained clamping during repeated surges without thermal runaway. |
Use Scenario: Placed upstream of TVS diodes or linear regulators to reduce peak stress on downstream protection elements. IC Role / Device Role / Timing Role: Coarse pre-regulator limiting input to safe levels before fine-grained protection engages. Use Value: 1 mA leakage at 4 V ensures minimal quiescent current impact on battery-powered systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A (ON Semiconductor) | 6.2 V nominal, ±5%, 1.0 W rating, DO-41 package | Higher power rating suits higher-current regulation; larger DO-41 footprint requires PCB redesign | Select when >500 mW dissipation or longer thermal time constants are required |
| BZX55C6V2 (Vishay) | 6.2 V nominal, ±5%, 500 mW, DO-35 package, 10 Ω ZZ, but 100 nA leakage @ 4 V | Lower leakage improves high-impedance bias networks; identical footprint enables drop-in replacement | Prefer for ultra-low-power sensor nodes where sub-µA leakage is critical |
Compared with 1N5995B_T50R, the 1N4734A offers higher power headroom at the cost of board space, while the BZX55C6V2 matches the DO-35 form factor and regulation performance but delivers 1000× lower leakage-making it ideal for battery-critical designs where 1N5995B_T50R's 1 mA IR may introduce measurable error.
Availability
1N5995B_T50R is available at Aetrix Electronics and suitable for voltage reference, power supply feedback, and overvoltage protection applications requiring stable component supply, consistent Zener tolerance, and high-temperature operational capability.
Supply support for 1N5995B_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; its legacy Zener diode portfolio remains widely deployed in industrial and automotive systems.
The 1N59xxB series was engineered for high-reliability voltage reference and regulation in space-constrained, thermally demanding applications-emphasizing tight tolerance, stable impedance, and extended temperature operation.
FAQ
What is the nominal Zener voltage of the 1N5995B_T50R?
The 1N5995B_T50R has a nominal Zener voltage of 6.2 V, with a guaranteed range of 5.89 V to 6.51 V at a test current of 5 mA. This specification is defined per Fairchild's 1N5985B–1N6025B datasheet Rev. C2 and reflects the device's calibrated regulation point under standard thermal conditions. The 1N5995B_T50R achieves this performance in its DO-35 glass package with ±5% tolerance.
Does the 1N5995B_T50R have a specified forward voltage?
Yes-the 1N5995B_T50R has a maximum forward voltage (VF) of 1.2 V at a forward current (IF) of 200 mA, as stated in the Absolute Maximum Ratings table of the Fairchild datasheet. While primarily used in reverse breakdown, this VF value confirms diode functionality in forward conduction mode and supports use in polarity protection or OR-ing configurations where needed.
What is the maximum allowable junction temperature for the 1N5995B_T50R?
The 1N5995B_T50R is rated for an operating junction temperature range of -65°C to +200°C, matching its storage temperature specification. This wide range is enabled by the DO-35 glass package and internal construction, making the 1N5995B_T50R suitable for under-hood automotive, downhole industrial, and high-ambient military applications where thermal resilience is critical.
How does the 1N5995B_T50R handle power derating above 75°C?
The 1N5995B_T50R derates linearly at 4.0 mW/°C above a lead temperature of 75°C, reducing its maximum power dissipation from 500 mW. For example, at 105°C lead temperature, allowable PD drops to 380 mW. This derating curve is defined in the Absolute Maximum Ratings section and must be applied in thermal design to prevent premature failure or VZ drift in the 1N5995B_T50R.
Is the 1N5995B_T50R RoHS compliant?
The 1N5995B_T50R is manufactured to meet RoHS Directive 2011/65/EU requirements, as confirmed by Fairchild's product compliance documentation and material declarations. Lead-free soldering compatibility is supported, and the DO-35 glass package contains no restricted substances above threshold limits-ensuring the 1N5995B_T50R meets environmental standards for commercial and industrial deployment.
1N5995B_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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 4 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-35
1N5995B_T50R FAQ
1.How can I place an order for 1N5995B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5995B_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 1N5995B_T50R reliable?
The price and inventory of 1N5995B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5995B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5995B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5995B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5995B_T50R?
1N5995B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5995B_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 1N5995B_T50R?
For technical support, including 1N5995B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5995B_T50R requirements.
6.How does Aetrix verify that 1N5995B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5995B_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 1N5995B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5995B_T50R?
All 1N5995B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5995B_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 1N5995B_T50R part is unused and in its original packaging.
Return procedure for 1N5995B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5995B_T50R Tags
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