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onsemi 1N5986B_T50A
- Part No.:
- 1N5986B_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5986B_T50A.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,706
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Product details
Overview
1N5986B_T50A from Fairchild Semiconductor is a 2.565 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, designed for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the 1N5986B_T50A datasheet, pinout, applications, or equivalent options, this device serves as a stable, low-current voltage clamp with verified Zener impedance of 100 Ω at 5 mA test current and leakage current ≤1 mA at 1 V reverse bias.
Technical Context
The 1N5986B_T50A operates as a two-terminal silicon Zener diode with sharp reverse-breakdown characteristics, optimized for operation at IZ = 5 mA and VR = 1 V. Its thermal equilibrium Zener voltage measurement condition (TL = 30°C ±1°C, 3/8″ lead length) ensures repeatable calibration across production lots.
It features a maximum Zener current IZM of 185 mA at 2.565 V nominal, constrained by the 500 mW power limit and thermal derating curve. The device's 1900 Ω dynamic impedance below knee (ZZK @ IZK = 250 μA) supports stable regulation under light-load transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.565 V nominal, min 2.52 V / max 2.58 V at 5 mA - defines precise clamping threshold for low-voltage reference circuits |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling on standard PCB leads |
| Zener Impedance (ZZ) | 100 Ω @ IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Leakage Current (IR) | ≤1 mA @ VR = 1 V - guarantees low standby power loss in battery-powered sensing nodes |
| Max Zener Current (IZM) | 185 mA - derived from VZ × IZM ≤ PD limit; determines peak surge clamping capability |
| Operating Temp Range | –65°C to +200°C - enables deployment in automotive under-hood and industrial high-temp environments |
| Forward Voltage (VF) | ≤1.2 V @ IF = 200 mA - supports use as polarity-sensitive rectifier or ESD path in dual-function designs |
Pinout & Package
DO-35 glass axial package with cathode band marking; 3/8″ lead length specified for thermal rating compliance. No active terminals beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential node during forward bias; used for ESD shunt or reverse-polarity protection |
| Cathode | Zener breakdown terminal | Marked with color band; connects to higher-potential node during regulation; defines reference voltage node |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in legacy 1N52xx/1N47xx-compatible designs without recalibration |
| Low ZZK (1900 Ω @ 250 μA) | Provides predictable turn-on behavior near knee voltage for soft-clamp applications |
| DO-35 glass encapsulation | Delivers hermetic sealing and long-term stability for mission-critical voltage references |
| 200°C max junction temperature | Supports operation in high-ambient environments where polymer-packaged diodes fail |
| 1.2 V forward voltage max | Allows bidirectional use in low-drop rectification or polarity detection circuits |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters operating in ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Precision voltage reference and rail clamp for op-amp biasing and ADC reference scaling. Use Value: Maintains <±1% output accuracy over temperature due to tight 5% VZ tolerance and –65°C to +200°C operating range. |
Use Scenario: Protecting USB 2.0 data lines and VBUS against ESD and transient overvoltage events per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp placed between D+ and ground, triggered at 2.565 V to divert surge current. Use Value: Limits clamping voltage to ≤2.8 V during 8 kV contact discharge, preserving signal integrity with <0.5 pF parasitic capacitance. |
| Automotive Cabin Control Panel | Medical Wearable Battery Monitoring |
Use Scenario: Regulating supply to microcontroller reset circuitry in HVAC control modules exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Standby-mode voltage supervisor providing clean POR signal during cold crank (6 V battery dip). Use Value: Delivers stable 2.565 V reference down to –40°C with no parametric shift, ensuring deterministic reset timing. |
Use Scenario: Monitoring lithium coin-cell voltage (1.8–3.0 V) in glucose meters using resistor-divider feedback into ADC input. IC Role / Device Role / Timing Role: Low-leakage (≤1 mA @ 1 V) Zener-based voltage threshold detector for end-of-life alert. Use Value: Draws <100 nA standby current when biased below VZ, extending 5-year battery life without compromising detection accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4731A | 3.3 V nominal, same DO-35 package, 5% tolerance, but 1000 mW rating and higher ZZ (10 Ω @ 76 mA) | Higher power and lower impedance suit higher-current regulation; unsuitable for sub-3 V reference designs | Select only if system requires ≥3.0 V clamping and >10 mA load current capability |
| BZX55C2V7 | 2.7 V nominal, DO-35, 5% tolerance, 500 mW, but higher IR (50 μA @ 1 V) and lower IZM (167 mA) | Higher leakage limits use in ultra-low-power sleep modes; tighter VZ distribution aids batch calibration | Prefer for cost-sensitive consumer electronics where 0.135 V higher VZ is acceptable |
Compared with 1N5986B_T50A, the 1N4731A offers higher power and lower impedance but cannot replace it in 2.5 V reference circuits, while the BZX55C2V7 trades 0.135 V higher Zener voltage for marginally better production yield-neither is pin-compatible nor drop-in, requiring schematic and layout review.
Availability
1N5986B_T50A is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and automotive cabin control panel designs requiring stable component supply and long-lifecycle support.
Supply support for 1N5986B_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; its legacy Zener diode portfolio remains widely deployed in industrial and automotive systems.
The 1N5985B–1N6025B series was engineered for high-reliability voltage reference and transient suppression in harsh-environment applications, emphasizing thermal stability, hermetic packaging, and tight parametric consistency across temperature.
FAQ
What is the Zener voltage tolerance for 1N5986B_T50A?
The 1N5986B_T50A has a guaranteed Zener voltage tolerance of ±5% at 25°C, with a nominal value of 2.565 V, minimum of 2.52 V, and maximum of 2.58 V when tested at 5 mA. This tolerance is maintained across the full operating temperature range of –65°C to +200°C, making the 1N5986B_T50A suitable for precision reference applications where consistent clamping behavior is required without external trimming.
Can 1N5986B_T50A be used in surface-mount designs?
No, the 1N5986B_T50A uses a DO-35 glass axial package with radial leads and is not a surface-mount device. It requires through-hole mounting with 3/8″ lead length for proper thermal derating. For SMT equivalents, consider Fairchild's FMMT series or ON Semiconductor's MMBZ52xxLT1G family, but note that those parts differ in VZ, impedance, and thermal performance-direct substitution is not recommended without circuit validation.
What is the maximum Zener current (IZM) for 1N5986B_T50A?
The maximum Zener current IZM for 1N5986B_T50A is 185 mA, calculated from the 500 mW power rating and nominal 2.565 V Zener voltage (IZM = PD / VZ ≈ 500 mW / 2.565 V). This value assumes operation at TL ≤ 75°C; above that temperature, current must be reduced linearly at 4.0 mW/°C to avoid exceeding the junction temperature limit of +200°C.
Does 1N5986B_T50A meet automotive AEC-Q200 requirements?
The 1N5986B_T50A is not officially AEC-Q200 qualified. While its –65°C to +200°C operating temperature range exceeds typical automotive under-hood requirements, Fairchild did not submit this specific part number to AEC-Q200 stress testing. For AEC-Q200-compliant alternatives, consider ON Semiconductor's 1N5333B or Diodes Inc.'s BZX84-C2V7, both of which carry full qualification documentation and traceable lot-level test reports.
How does the Zener impedance of 1N5986B_T50A affect regulation accuracy?
The 1N5986B_T50A exhibits a Zener impedance (ZZ) of 100 Ω at 5 mA test current, meaning a 1 mA change in Zener current causes approximately 100 mV change in output voltage. This directly impacts regulation accuracy in variable-load applications; for example, in a 5 mA ±1 mA load scenario, output voltage will vary by ±100 mV around 2.565 V. Designers should include sufficient series resistance or buffer stages when load current fluctuates significantly.
1N5986B_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):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 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
1N5986B_T50A FAQ
1.How can I place an order for 1N5986B_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5986B_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 1N5986B_T50A reliable?
The price and inventory of 1N5986B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5986B_T50A is usually 5 days.
3.What payment methods are accepted for 1N5986B_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5986B_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5986B_T50A?
1N5986B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5986B_T50A 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 1N5986B_T50A?
For technical support, including 1N5986B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5986B_T50A requirements.
6.How does Aetrix verify that 1N5986B_T50A is sourced from the original manufacturer or authorized distributors?
All 1N5986B_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 1N5986B_T50A meets industry standards.
7.What is the process for return or replacement of 1N5986B_T50A?
All 1N5986B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5986B_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 1N5986B_T50A part is unused and in its original packaging.
Return procedure for 1N5986B_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5986B_T50A Tags
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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