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onsemi 1N5992B_T50R
- Part No.:
- 1N5992B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5992B_T50R.pdf
- Description:
- DIODE ZENER 4.7V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,447
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Product details
Overview
1N5992B_T50R from Fairchild Semiconductor is a 4.7 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 70 Ω zener impedance at 5 mA test current and 3 mA maximum leakage current at 1.5 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power analog regulators and signal conditioning circuits.
For engineers reviewing the 1N5992B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include its 4.7 V nominal zener voltage, tight 5% tolerance, DO-35 thermal derating profile (4.0 mW/°C above 75°C), and verified performance across -65°C to +200°C operating range.
Technical Context
The 1N5992B_T50R operates as a silicon planar Zener diode with controlled avalanche breakdown at 4.7 V, optimized for stable voltage regulation under low-current conditions (IZ = 5 mA). Its zener impedance of 70 Ω at IZ and 2200 Ω at IZK = 250 μA defines dynamic response in feedback loops and noise-sensitive references.
Thermal design relies on lead-length-dependent power derating: full 500 mW rating applies only when lead temperature (TL) is held ≤ 75°C with 3/8″ lead length; beyond that, linear derating of 4.0 mW/°C applies. The device's DO-35 glass package enables hermetic sealing and high-temperature storage up to +200°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.465 V (min) to 4.935 V (max) at 5 mA - ensures 4.7 V ±5% regulation window for stable reference design |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling with 3/8″ leads; critical for thermal layout |
| Zener Impedance (ZZ) | 70 Ω @ IZ = 5 mA - determines AC regulation error and ripple rejection in shunt regulator topologies |
| Leakage Current (IR) | 3 mA @ VR = 1.5 V - defines minimum reverse-bias current before breakdown onset; impacts standby power |
| Operating Temp Range | -65°C to +200°C - supports deployment in automotive under-hood, industrial motor control, and aerospace environments |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms low-conduction-loss behavior when used bidirectionally or in protection clamps |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no PCB footprint rework for standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; connected to lower-potential node in Zener mode | Enables standard diode conduction path; referenced to ground or common rail in shunt regulator designs |
| Cathode | Current exit terminal during forward bias; connected to higher-potential node in Zener mode | Marked by color band; ties to regulated output node in voltage-reference applications |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees 4.465–4.935 V regulation window without post-manufacturing trimming |
| Low zener impedance (70 Ω) | Minimizes output voltage deviation under load transients in precision reference circuits |
| Hermetic DO-35 glass package | Ensures long-term stability and moisture resistance in harsh industrial environments |
| Wide temperature operation (-65°C to +200°C) | Eliminates need for external thermal compensation in high-ambient applications |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing ADC reference input in 4–20 mA loop-powered sensors exposed to ambient temperatures up to +125°C. IC Role / Device Role / Timing Role: Zener diode providing 4.7 V shunt reference for op-amp-based voltage scaling circuitry. Use Value: Maintains <±10 mV drift over temperature due to low ZZ and wide TJ range, reducing calibration frequency. |
Use Scenario: Clamping microcontroller I/O voltage against load-dump transients in 12 V battery-supplied BCMs. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage protector on LIN bus interface pins. Use Value: Limits transient peaks to ≤4.94 V (max VZ) while surviving 3 ms pulses per ISO 7637-2 Pulse 5a. |
| Low-Power IoT Node Voltage Reference | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Generating stable 4.7 V bias for ultra-low-power op-amps in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Passive voltage reference enabling <1 μA quiescent current in sleep mode. Use Value: Achieves 0.5% line regulation with <3 mA leakage at 1.5 V, extending coin-cell life by >18 months. |
Use Scenario: Providing isolated 4.7 V supply for photodiode amplifier stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing gain-setting network voltage. Use Value: Delivers <50 μV RMS noise floor over 10 Hz–100 kHz due to low ZZ and absence of active circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A (ON Semiconductor) | Same 5.6 V nominal rating but 5% tolerance; 100 Ω ZZ @ 43 mA - higher test current, higher impedance | Requires higher bias current; less suitable for low-IZ reference designs | Select 1N5992B_T50R when 4.7 V target and 5 mA operation are mandatory |
| BZX55-C4V7 (Vishay) | Same 4.7 V ±5%, DO-35 package, but 100 Ω ZZ @ 5 mA and 100 nA IR @ 3.2 V - lower leakage, higher ZZ | Better for ultra-low-leakage biasing; inferior AC regulation vs. 1N5992B_T50R | Choose 1N5992B_T50R where low dynamic impedance dominates leakage concerns |
Compared with 1N4734A and BZX55-C4V7, the 1N5992B_T50R delivers superior regulation accuracy at low bias currents (5 mA) and lower dynamic impedance (70 Ω), making it optimal for space-constrained, low-power reference designs where thermal margin and AC stability are prioritized over ultra-low leakage.
Availability
1N5992B_T50R is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control module reference, and low-power IoT node voltage reference requiring stable component supply and consistent DO-35 packaging.
Supply support for 1N5992B_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 1N5992B_T50R belongs to Fairchild's legacy 1N59xxB Zener diode family, engineered for high-reliability voltage regulation in industrial, automotive, and medical systems demanding wide temperature operation and tight tolerance.
FAQ
What is the exact Zener voltage range for 1N5992B_T50R at 25°C?
The 1N5992B_T50R has a guaranteed Zener voltage range of 4.465 V (minimum) to 4.935 V (maximum) at 5 mA test current and 25°C ambient, reflecting its ±5% tolerance specification. This range is measured under thermal equilibrium at lead temperature TL = 30°C ± 1°C with 3/8″ lead length, as defined in the Fairchild datasheet Rev. C2.
Does 1N5992B_T50R support operation above 125°C junction temperature?
Yes, the 1N5992B_T50R is rated for junction and storage temperatures from -65°C to +200°C. Its DO-35 glass package enables reliable operation beyond 125°C, provided power dissipation remains within the derated limit-e.g., at 150°C TL, maximum PD drops to 500 mW − (4.0 mW/°C × 75°C) = 200 mW.
How does the zener impedance of 1N5992B_T50R affect its use in a shunt regulator?
The 1N5992B_T50R's 70 Ω zener impedance at 5 mA directly determines output voltage variation under load changes: ΔVOUT ≈ ZZ × ΔIZ. For example, a 10 mA load step causes ~0.7 V shift-making it suitable for moderate-precision applications but requiring additional filtering if sub-10 mV regulation is needed.
Can 1N5992B_T50R be used as a bidirectional ESD clamp?
No-1N5992B_T50R is a unidirectional Zener diode optimized for reverse-bias regulation. While its forward voltage is 1.2 V max at 200 mA, it lacks specified ESD robustness (e.g., HBM or IEC 61000-4-2 ratings). Dedicated TVS diodes like P6KE6.8CA are recommended for ESD/clamp applications.
Is the 1N5992B_T50R RoHS compliant and halogen-free?
Yes-the 1N5992B_T50R conforms to RoHS Directive 2011/65/EU and is halogen-free per JEDEC JS709A. Its DO-35 glass package contains no lead in solderable terminations, and material declarations confirm compliance with REACH SVHC thresholds as documented in Fairchild's legacy product certifications.
1N5992B_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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1.5 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
1N5992B_T50R FAQ
1.How can I place an order for 1N5992B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5992B_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 1N5992B_T50R reliable?
The price and inventory of 1N5992B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5992B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5992B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5992B_T50R transactions.
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4.How is shipping managed for 1N5992B_T50R?
1N5992B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5992B_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 1N5992B_T50R?
For technical support, including 1N5992B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5992B_T50R requirements.
6.How does Aetrix verify that 1N5992B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5992B_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 1N5992B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5992B_T50R?
All 1N5992B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5992B_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 1N5992B_T50R part is unused and in its original packaging.
Return procedure for 1N5992B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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