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onsemi 1N5996B_T50A
- Part No.:
- 1N5996B_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5996B_T50A.pdf
- Description:
- DIODE ZENER 6.8V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
1N5996B_T50A from Fairchild Semiconductor is a 6.46 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 4.0 mW/°C derating, 8 Ω zener impedance at 5 mA test current, and 5.2 mA leakage current at 4 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits.
For engineers reviewing the 1N5996B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include its 6.46 V nominal zener voltage, DO-35 mechanical compatibility, thermal derating behavior, and low-leakage performance at VR = 4 V.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage regulation in low-current, low-power applications. Its 6.46 V nominal breakdown voltage is specified at 5 mA test current with ±5% tolerance, and it exhibits 8 Ω dynamic impedance (ZZ) under that condition.
The 1N5996B_T50A uses a glass-passivated DO-35 axial package with cathode band marking, supports operation from –65°C to +200°C, and delivers 74 mA maximum zener current (IZM) based on its power rating and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46 V nominal at 5 mA - defines precise clamping/reference level in feedback or protection circuits |
| Tolerance | ±5% - ensures predictable voltage accuracy across production lots without trimming |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZ) | 8 Ω @ IZ = 5 mA - determines output voltage stability under small-signal load variations |
| Leakage Current (IR) | 1 mA @ VR = 4 V - confirms minimal off-state conduction below breakdown threshold |
| Max Zener Current (IZM) | 74 mA - derived from PD / VZ, limiting safe DC or pulse current capability |
| Operating Temp Range | –65°C to +200°C - enables use in automotive under-hood or industrial high-temp environments |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band on the body; anode and cathode terminals are unmarked leads extending from opposite ends of the cylindrical glass envelope.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward-biased terminal during conduction | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node to enable controlled reverse breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Stable 6.46 V reference | ±5% tolerance at 5 mA enables repeatable voltage setting without external calibration |
| Low dynamic impedance | 8 Ω at 5 mA minimizes output voltage shift under varying load currents |
| High-temperature operation | Rated to +200°C junction temperature supports under-hood or enclosed industrial use |
| DO-35 mechanical standardization | Industry-standard axial glass package ensures compatibility with legacy through-hole assembly processes |
| Controlled leakage performance | 1 mA IR at 4 V allows reliable blocking in standby or low-power sleep modes |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Regulating output voltage in discrete linear regulators or SMPS feedback loops. IC Role / Device Role / Timing Role: Precision voltage reference element providing stable setpoint to error amplifier. Use Value: 6.46 V nominal VZ and ±5% tolerance ensure accurate output regulation without trimming components. |
Use Scenario: Clamping transient surges on low-voltage signal or supply rails. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy when voltage exceeds 6.46 V. Use Value: 8 Ω ZZ and 500 mW PD allow effective clamping of short-duration transients up to 74 mA peak. |
| Sensor Signal Conditioning | Reference Voltage Generation |
Use Scenario: Biasing or level-shifting analog sensor outputs in industrial transmitters. IC Role / Device Role / Timing Role: Stable bias point generator for op-amp input stages or bridge excitation. Use Value: Low 1 mA leakage at 4 V prevents loading of high-impedance sensor nodes during normal operation. |
Use Scenario: Providing fixed reference for ADCs, comparators, or voltage monitors in embedded systems. IC Role / Device Role / Timing Role: Passive voltage reference source independent of supply rail fluctuations. Use Value: –65°C to +200°C operating range ensures stable reference across wide environmental conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A | 6.8 V nominal VZ, same DO-35 package, 5% tolerance, 8.5 Ω ZZ @ 37 mA | Higher VZ shifts regulation point; requires circuit recalibration for 6.46 V target | Select when 6.8 V reference is acceptable and higher test current improves impedance stability |
| BZX55C6V2 | 6.2 V nominal VZ, DO-35, 5% tolerance, 10 Ω ZZ @ 5 mA, 500 mW rating | Lower VZ reduces clamping threshold; tighter thermal coefficient than 1N5996B_T50A | Choose for improved tempco performance where 6.2 V is functionally sufficient |
Compared with 1N5996B_T50A, 1N4736A offers higher voltage headroom but requires layout-level recalibration, while BZX55C6V2 provides better temperature stability at a slightly lower regulation point-neither is pin-compatible nor drop-in, but both serve overlapping low-power reference roles.
Availability
1N5996B_T50A is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1N5996B_T50A 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 1N5996B_T50A belongs to Fairchild's legacy 1N59xxB Zener diode family, designed for general-purpose voltage regulation and protection in cost-sensitive, high-reliability industrial and consumer applications.
FAQ
What is the nominal zener voltage of the 1N5996B_T50A?
The 1N5996B_T50A has a nominal zener voltage of 6.46 V, measured at a test current of 5 mA with ±5% tolerance. This value is confirmed in the Fairchild 1N5985B–1N6025B datasheet Rev. C2, page 1, under Electrical Characteristics. The 1N5996B_T50A maintains this specification across its qualified operating temperature range.
What package type does the 1N5996B_T50A use?
The 1N5996B_T50A uses a DO-35 glass axial package with cathode indicated by a single color band. This is explicitly stated in the "Top Mark Information" section and confirmed in the Absolute Maximum Ratings table of the Fairchild datasheet. The DO-35 form factor supports standard through-hole mounting and manual or automated insertion.
What is the maximum zener current (IZM) for the 1N5996B_T50A?
The maximum zener current (IZM) for the 1N5996B_T50A is 74 mA. This value is calculated from the 500 mW power rating divided by the typical zener voltage (6.46 V), and is consistent with the datasheet's "Electrical Characteristics" table entry for 1N5996B, which lists IZM = 74 mA under Note 2.
Does the 1N5996B_T50A have a specified forward voltage?
Yes-the 1N5996B_T50A has a maximum forward voltage (VF) of 1.2 V at 200 mA forward current, as documented in the "Absolute Maximum Ratings" section of the Fairchild datasheet. This parameter applies only during forward conduction and is not used in standard Zener regulation mode.
What is the zener impedance (ZZ) of the 1N5996B_T50A at its test current?
The zener impedance (ZZ) of the 1N5996B_T50A is 8 Ω at the specified test current of 5 mA, per the "Electrical Characteristics" table on page 1 of the Fairchild datasheet. This low dynamic impedance ensures minimal voltage variation under small-signal load changes in regulation applications.
1N5996B_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5.2 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
1N5996B_T50A FAQ
1.How can I place an order for 1N5996B_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5996B_T50A 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 1N5996B_T50A reliable?
The price and inventory of 1N5996B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5996B_T50A is usually 5 days.
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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 1N5996B_T50A?
For technical support, including 1N5996B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5996B_T50A requirements.
6.How does Aetrix verify that 1N5996B_T50A is sourced from the original manufacturer or authorized distributors?
All 1N5996B_T50A 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 1N5996B_T50A meets industry standards.
7.What is the process for return or replacement of 1N5996B_T50A?
All 1N5996B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5996B_T50A, 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 1N5996B_T50A part is unused and in its original packaging.
Return procedure for 1N5996B_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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