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onsemi 1N4736A-T50R
- Part No.:
- 1N4736A-T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736A-T50R.pdf
- Description:
- DIODE ZENER 6.8V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,532
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Product details
Overview
1N4736A-T50R from onsemi is a 6.8 V, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance, 3.5 Ω dynamic impedance at 37 mA test current, and 0.5 μA leakage at 5.4 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power linear regulators and analog signal conditioning circuits.
For engineers reviewing the 1N4736A-T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating behavior (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The 1N4736A-T50R operates in reverse breakdown mode with tightly controlled VZ = 6.8 V (min 6.46 V, max 7.14 V) at IZ = 37 mA. Its low ZZ = 37 Ω ensures stable regulation under varying load currents, while ZZK = 4 Ω at IZK = 1 mA supports reliable knee conduction during low-current biasing.
Designed for DC voltage stabilization, it exhibits 0.5 μA maximum leakage at VR = 5.4 V and withstands non-repetitive peak reverse surge current IZSM = 660 mA (8.3 ms square wave). Thermal performance is defined for lead temperature TL ≤ 50°C with 3/8″ lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V nominal, 6.46–7.14 V range at 37 mA - defines regulated output voltage tolerance in reference circuits |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZ) | 37 Ω @ IZ = 37 mA - determines regulation stiffness against load current variation |
| Leakage Current (IR) | 0.5 μA max @ VR = 5.4 V - ensures minimal error current in high-impedance bias networks |
| Operating Temperature | –65°C to +200°C - enables use in automotive under-hood, industrial control, and aerospace environments |
| Tolerance | ±5% - specifies initial VZ accuracy without trimming or calibration |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band. Leads are tinned copper-clad steel; body diameter 2.0–2.7 mm, length 4.5–6.0 mm, lead diameter 0.45–0.60 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-biased operation | Connected to circuit ground or lower potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-voltage side in reverse-biased operation | Connected to input or supply rail; clamps voltage to VZ when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage | 6.8 V ±5% with tight min/max bounds (6.46–7.14 V) enables predictable reference design without post-manufacture sorting |
| Low dynamic impedance | 37 Ω at 37 mA ensures <10 mV output shift per 1 mA load change in feedback loops |
| High surge capability | 660 mA non-repetitive peak reverse current (8.3 ms) supports transient overvoltage suppression in unregulated supplies |
| Wide temperature range | –65°C to +200°C operation allows deployment in engine control units and downhole instrumentation |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 6.8 V reference for microcontroller ADC bias and sensor excitation in ECU ambient temperature cycling. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining constant bias point despite battery voltage fluctuations (9–16 V). Use Value: ±5% VZ tolerance and –65°C to +200°C rating ensure consistent ADC full-scale accuracy across thermal extremes. |
Use Scenario: Clamping and scaling analog outputs from pressure/temperature transducers before feeding into op-amp front-ends. IC Role / Device Role / Timing Role: Precision clamp limiting signal swing to protect downstream amplifiers from overvoltage events. Use Value: 37 Ω ZZ minimizes clamping voltage deviation during fast transients, preserving signal fidelity. |
| Low-Power Linear Regulator Feedback | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Setting regulated 6.8 V output in discrete transistor-based series pass regulators for legacy industrial modules. IC Role / Device Role / Timing Role: Voltage reference element in feedback divider network controlling base drive of pass transistor. Use Value: 1.0 W power rating supports continuous dissipation in compact enclosures without forced air cooling. |
Use Scenario: Protecting 24 V digital input channels from ESD and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Reverse-biased shunt clamp diverting surge energy away from optocoupler input LED. Use Value: 660 mA IZSM rating handles typical 24 V PLC line surges per IEC 61000-4-5 Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A-TP (Micro Commercial Co.) | VZ = 6.8 V ±5%, same DO-41 package, but ZZ = 40 Ω (vs. 37 Ω) and PD = 1.0 W @ TL ≤ 50°C | Identical functional role; slightly higher impedance may increase regulation error in high-precision references | Select when sourcing flexibility is prioritized and 3 Ω ZZ margin is acceptable |
| BZX55C6V8 (Vishay) | VZ = 6.8 V ±5%, DO-35 package (smaller than DO-41), ZZ = 40 Ω, PD = 500 mW (vs. 1.0 W) | Lower power rating limits use in sustained clamp or reference roles; smaller footprint suits space-constrained designs | Select only for low-duty-cycle clamping where thermal mass is not limiting |
Compared with 1N4736A-T50R, the 1N4736A-TP offers identical electrical specs and mechanical fit, while BZX55C6V8 trades power handling and thermal robustness for miniaturization-making 1N4736A-T50R optimal for thermally demanding, high-reliability shunt regulation.
Availability
1N4736A-T50R is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and programmable logic controller input protection requiring stable component supply and long-term manufacturability.
Supply support for 1N4736A-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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The 1N47xxA series was developed specifically for general-purpose, high-reliability Zener voltage regulation in cost-sensitive, high-volume applications where DO-41 mechanical ruggedness and ±5% tolerance meet system-level accuracy needs.
FAQ
What is the Zener voltage tolerance for 1N4736A-T50R?
The 1N4736A-T50R has a Zener voltage tolerance of ±5%, meaning its nominal 6.8 V rating falls between 6.46 V and 7.14 V at 37 mA test current. This tolerance is guaranteed across the full operating temperature range and applies to every unit without binning or selection. The 1N4736A-T50R meets this spec under standard test conditions defined in the onsemi datasheet Rev. 8.
Can 1N4736A-T50R be used in surface-mount designs?
No, the 1N4736A-T50R uses a DO-41 axial glass package with leads intended for through-hole mounting only. It is not compatible with reflow soldering or pick-and-place assembly. For SMT equivalents, consider the MMBZ5235B (SOT-23, 6.8 V) or BZX84-C6V8 (SOT-23), but note these differ in power rating, impedance, and thermal behavior versus the 1N4736A-T50R.
What is the maximum non-repetitive peak reverse current for 1N4736A-T50R?
The 1N4736A-T50R supports a non-repetitive peak reverse current (IZSM) of 660 mA under an 8.3 ms square-wave pulse condition. This rating reflects its ability to absorb transient energy without failure, making it suitable for basic overvoltage protection in DC power rails. The 1N4736A-T50R must return to safe operating conditions before subsequent surges.
How does thermal derating work for 1N4736A-T50R?
The 1N4736A-T50R derates linearly at 6.67 mW/°C above a lead temperature of 50°C. At 100°C lead temperature, its usable power drops to 667 mW. Derating is based on 3/8″ lead length and requires proper PCB copper pour or heatsinking to maintain thermal resistance. This behavior is documented in the Absolute Maximum Ratings table of the 1N4736A-T50R datasheet.
Is 1N4736A-T50R suitable for precision voltage reference applications?
The 1N4736A-T50R provides adequate stability for moderate-precision applications (e.g., ±1% system-level accuracy), but lacks features like temperature-compensated curvature or low TC drift required for high-precision references. Its 37 Ω dynamic impedance and ±5% VZ tolerance make it appropriate for cost-sensitive regulation-not metrology-grade references. For such use cases, the 1N4736A-T50R remains a proven, widely deployed solution.
1N4736A-T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4736A-T50R FAQ
1.How can I place an order for 1N4736A-T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736A-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 1N4736A-T50R reliable?
The price and inventory of 1N4736A-T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736A-T50R is usually 5 days.
3.What payment methods are accepted for 1N4736A-T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736A-T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736A-T50R?
1N4736A-T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736A-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 1N4736A-T50R?
For technical support, including 1N4736A-T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736A-T50R requirements.
6.How does Aetrix verify that 1N4736A-T50R is sourced from the original manufacturer or authorized distributors?
All 1N4736A-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 1N4736A-T50R meets industry standards.
7.What is the process for return or replacement of 1N4736A-T50R?
All 1N4736A-T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736A-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 1N4736A-T50R part is unused and in its original packaging.
Return procedure for 1N4736A-T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736A-T50R Tags
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