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onsemi 1N4735A-T50R
- Part No.:
- 1N4735A-T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4735A-T50R.pdf
- Description:
- DIODE ZENER 6.2V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,738
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Product details
Overview
1N4735A-T50R from ON Semiconductor is a 6.2 V, ±5% tolerance, 1 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications at 37 mA test current with 41 Ω dynamic impedance and 3 µA leakage at 4.96 V reverse bias.
For engineers reviewing the 1N4735A-T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, power derating above 50°C, thermal resistance, peak reverse surge capability (730 mA), and DO-41 mechanical compatibility in low-to-medium power analog circuits.
Technical Context
The 1N4735A-T50R operates as a silicon planar Zener diode with sharp reverse breakdown at precisely 6.2 V under 37 mA DC test current. Its 41 Ω Zener impedance at IZ and 500 Ω impedance at knee current (2 mA) support stable regulation across load and line variations.
Rated for 1.0 W power dissipation at lead temperature ≤50°C with 6.67 mW/°C linear derating, it maintains operation from –65°C to +200°C junction/storage range and withstands non-repetitive 8.3 ms reverse surge up to 730 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, min 5.89 V / max 6.51 V at 37 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling with defined thermal boundary condition |
| Zener Impedance (ZZ) | 41 Ω @ IZ = 37 mA - determines output voltage variation under changing load current |
| Knee Impedance (ZZK) | 700 Ω @ IZK = 1 mA - indicates regulation onset behavior near threshold conduction |
| Leakage Current (IR) | 3 µA max @ VR = 4.96 V - ensures minimal error current in high-impedance reference nodes |
| Peak Reverse Surge (IZSM) | 730 mA @ 8.3 ms - supports transient overvoltage clamping without failure |
| Operating Temperature | –65°C to +200°C - enables use in automotive under-hood, industrial control, and aerospace environments |
Pinout & Package
DO-41 glass axial package with cathode band marking; leads are unmarked anode and banded cathode terminals. Mechanical dimensions comply with JEDEC DO-41 standard: body diameter 2.0–2.7 mm, length 4.0–5.3 mm, lead diameter 0.4–0.6 mm.
| 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 in shunt regulation configuration |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 6.2 V referenced to anode; requires series resistor to limit current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures predictable regulation setpoint without post-manufacture trimming in cost-sensitive designs |
| 1.0 W power rating with linear derating | Supports robust operation in ambient temperatures up to 175°C with appropriate PCB copper area |
| DO-41 glass package | Enables hand-soldering, wave soldering, and long-term hermetic reliability in humid or corrosive environments |
| 730 mA non-repetitive surge rating | Provides inherent transient immunity for input protection without external TVS devices |
| –65°C to +200°C operating range | Validates suitability for engine control units, downhole sensors, and military-grade power supplies |
Applications
| Power Supply Regulation | Reference Voltage Source |
|---|---|
Use Scenario: Stabilizing unregulated DC outputs in linear regulators and switching converter feedback networks. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 6.2 V reference for error amplifiers and comparators. Use Value: Maintains ±5% output accuracy over temperature and load, reducing need for precision op-amps or trimming resistors. |
Use Scenario: Generating stable bias voltages for analog front-ends, ADC references, and sensor excitation circuits. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference node with 3 µA leakage minimizing loading error. Use Value: Enables 12-bit ADC accuracy without calibration when paired with low-impedance buffer stages. |
| Overvoltage Protection | Signal Level Clamping |
Use Scenario: Protecting microcontroller I/O pins and communication lines against ESD and supply transients. IC Role / Device Role / Timing Role: Passive crowbar element conducting above 6.2 V to divert surge energy to ground. Use Value: Absorbs 730 mA 8.3 ms surges without degradation, extending system-level reliability beyond basic TVS requirements. |
Use Scenario: Limiting AC signal swing in audio preamplifiers, op-amp input stages, and data acquisition inputs. IC Role / Device Role / Timing Role: Bidirectional clamp using back-to-back configuration or single-diode with bias offset. Use Value: Provides symmetrical ±6.2 V clipping with <41 Ω dynamic resistance, preserving signal fidelity below threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A (DO-41, bulk) | Identical electrical specs; same Zener voltage, impedance, and surge rating; differs only in packaging (T50R = tape-and-reel, standard = bulk) | No functional difference; T50R enables automated SMT placement while bulk supports manual prototyping or through-hole rework | Select 1N4735A-T50R for production line integration; choose bulk 1N4735A for lab validation or low-volume assembly |
| BZX55C6V2 (DO-35) | Same 6.2 V ±5%, but rated at 500 mW and packaged in smaller DO-35; higher ZZ (60 Ω) and lower IZSM (400 mA) | Not suitable for 1 W continuous loads or high-surge environments; limited to low-power portable electronics | Choose BZX55C6V2 only where board space is constrained and power demand stays below 300 mW |
Compared with 1N4735A-T50R, the bulk 1N4735A offers identical performance with manual handling trade-offs, while BZX55C6V2 sacrifices power and surge capability for miniaturization-making 1N4735A-T50R optimal for robust, medium-power regulation where reel-fed automation is required.
Availability
1N4735A-T50R is available at Aetrix Electronics and suitable for power supply regulation, reference voltage generation, overvoltage protection, and signal level clamping requiring stable component supply and full traceability.
Supply support for 1N4735A-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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N47xxA series was engineered for general-purpose voltage regulation and reference applications, emphasizing reliability, wide temperature operation, and compatibility with legacy DO-41 assembly processes.
FAQ
What is the Zener voltage tolerance of the 1N4735A-T50R?
The 1N4735A-T50R has a Zener voltage tolerance of ±5%, meaning its actual breakdown voltage falls between 5.89 V and 6.51 V when measured at 37 mA test current and 25°C. This tolerance is guaranteed per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, and applies directly to the 1N4735A-T50R as a member of the same family. No binning or sorting is required to achieve this specification.
Can the 1N4735A-T50R be used in surface-mount applications?
No-the 1N4735A-T50R uses a DO-41 axial glass package with 0.4–0.6 mm diameter leads intended for through-hole mounting. It is not compatible with SMT reflow or pick-and-place equipment. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like MMBZ5231B, but note that those differ in power rating, impedance, and thermal performance versus the 1N4735A-T50R.
What is the maximum allowable junction temperature for the 1N4735A-T50R?
The 1N4735A-T50R has a maximum junction temperature (TJ) of +200°C, as specified in the Absolute Maximum Ratings table of the ON Semiconductor 1N4728A–1N4758A datasheet. This rating assumes proper thermal management via lead conduction; sustained operation above 175°C requires verification of PCB copper area and ambient airflow, since power derating begins at 50°C lead temperature.
How does the 1N4735A-T50R compare to the 1N4736A in terms of Zener voltage?
The 1N4735A-T50R is rated for 6.2 V nominal Zener voltage (5.89–6.51 V), whereas the 1N4736A is rated for 6.8 V (6.46–7.14 V). Both share identical DO-41 packaging, 1 W power rating, ±5% tolerance, and 37 mA test current-but their regulation points differ by 0.6 V. Substituting one for the other will shift reference or clamp thresholds and must be validated in circuit simulation and hardware testing before deployment.
Is the 1N4735A-T50R RoHS compliant and halogen-free?
Yes-the 1N4735A-T50R meets RoHS Directive 2011/65/EU and is halogen-free per ON Semiconductor's product compliance documentation. The device carries the "Pb-Free" and "Halogen Free" markings per J-STD-609, and its DO-41 glass package contains no lead in the glass envelope or internal structure. Full compliance data is available in ON Semiconductor's PPAP documentation for the 1N47xxA family.
1N4735A-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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4735A-T50R FAQ
1.How can I place an order for 1N4735A-T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4735A-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 1N4735A-T50R reliable?
The price and inventory of 1N4735A-T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4735A-T50R is usually 5 days.
3.What payment methods are accepted for 1N4735A-T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4735A-T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4735A-T50R?
1N4735A-T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4735A-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 1N4735A-T50R?
For technical support, including 1N4735A-T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4735A-T50R requirements.
6.How does Aetrix verify that 1N4735A-T50R is sourced from the original manufacturer or authorized distributors?
All 1N4735A-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 1N4735A-T50R meets industry standards.
7.What is the process for return or replacement of 1N4735A-T50R?
All 1N4735A-T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4735A-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 1N4735A-T50R part is unused and in its original packaging.
Return procedure for 1N4735A-T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4735A-T50R Tags
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