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onsemi 1N758A_T50R
- Part No.:
- 1N758A_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N758A_T50R.pdf
- Description:
- DIODE ZENER 10V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,946
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Product details
Overview
1N758A_T50R from Fairchild Semiconductor is a 10 V, ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 17 Ω dynamic impedance at 20 mA and 0.1 µA reverse leakage at 1 V, used for precision voltage regulation in low-power analog reference circuits.
For engineers reviewing the 1N758A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode band identification, and compatibility with through-hole PCB layouts requiring stable 10 V reference sources.
Technical Context
This device operates as a two-terminal voltage reference diode, relying on controlled avalanche breakdown in its p-n junction to maintain stable reverse-biased voltage across a defined current range (IZ = 20 mA typical). Its 10 V nominal zener voltage falls within the mid-range of the 1N746A–1N759A series, optimized for general-purpose regulation where ±5% tolerance and low-cost DO-35 packaging are prioritized.
The 1N758A_T50R exhibits 17 Ω dynamic impedance at 20 mA, indicating moderate regulation sensitivity to load current changes, and maintains 0.1 µA reverse leakage at VR = 1 V - confirming low off-state conduction suitable for battery-powered or high-impedance bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZ = 20 mA | 10 V nominal, min 9.5 V / max 10.5 V - defines usable regulation window under standard test conditions |
| Tolerance | ±5% - sets absolute accuracy bound for open-loop reference use without trimming |
| ZZ @ IZ = 20 mA | 17 Ω - quantifies output resistance; impacts regulation error under ±5 mA load variation |
| PD @ TL ≤ 75°C | 500 mW - maximum continuous power before thermal derating begins |
| IR @ VR = 1 V | 0.1 µA - ensures negligible standby current in high-Z divider or sensing nodes |
| Package | DO-35 glass case - industry-standard axial leaded package with cathode band marking |
| Operating Temp | -65°C to +200°C - supports extended industrial and automotive under-hood environments |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band near one lead end; no polarity-sensitive terminals beyond anode/cathode distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connects to higher potential node to enable regulated voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| Stable 10 V reference | Provides predictable, repeatable breakdown voltage for analog signal conditioning and supply monitoring |
| ±5% voltage tolerance | Enables cost-effective use in non-critical regulation without external trimming circuitry |
| 500 mW power rating | Supports operation up to ~50 mA at 10 V in ambient conditions before thermal derating applies |
| Low 0.1 µA leakage | Minimizes error in high-impedance voltage dividers and battery-backed reference networks |
| DO-35 glass construction | Offers hermetic sealing and proven reliability in long-life industrial applications |
Applications
| Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Providing stable 10 V reference for linear regulator feedback or ADC reference buffer. IC Role / Device Role / Timing Role: Voltage reference diode establishing precise DC bias point. Use Value: Delivers ±5% accuracy without calibration, reducing BOM count versus trimmed references. | Use Scenario: Clamping transient surges on 12 V rail to protect downstream logic inputs. IC Role / Device Role / Timing Role: Shunt protection element diverting excess energy above 10.5 V threshold. Use Value: Limits peak voltage to safe level using inherent avalanche response with no active control. |
| Sensor Bias Network | Current Source Stabilizer |
Use Scenario: Biasing resistive temperature sensors (RTDs) in 4-wire measurement bridges. IC Role / Device Role / Timing Role: Precision voltage source setting excitation current magnitude. Use Value: Maintains constant 10 V across bridge legs despite supply ripple, improving measurement SNR. | Use Scenario: Setting reference voltage for constant-current LED driver ICs. IC Role / Device Role / Timing Role: Stable voltage reference defining current-sense resistor voltage drop. Use Value: Ensures consistent LED brightness across input voltage variations and temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V, ±5%, 500 mW, but 22 Ω ZZ @ 25 mA - higher dynamic impedance than 1N758A_T50R | Less precise regulation under varying load; wider availability in modern distribution channels | Prefer 1N758A_T50R when lower ZZ and legacy design continuity are required |
| BZX55C10 | 10 V, ±5%, 500 mW, DO-35, but 20 Ω ZZ @ 5 mA - tested at lower current, not directly comparable at 20 mA | Designed for lower test current; may exhibit different knee characteristics in low-Iz applications | Choose 1N758A_T50R for designs validated per Fairchild's 20 mA test condition and thermal profile |
Compared with 1N4740A and BZX55C10, the 1N758A_T50R offers lower dynamic impedance at its specified 20 mA test current and matches the original Fairchild thermal derating curve, making it preferable for legacy-replacement and thermally constrained designs.
Availability
1N758A_T50R is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and sensor bias applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N758A_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 1N758A_T50R belongs to Fairchild's legacy 1N7xxA Zener diode family, designed for general-purpose voltage regulation and clamping in cost-sensitive, through-hole industrial and consumer electronics.
FAQ
What is the nominal zener voltage and tolerance of the 1N758A_T50R?
The 1N758A_T50R has a nominal zener voltage of 10 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 9.5 V and 10.5 V when measured at 20 mA and 25°C. This tolerance is specified per Fairchild's Rev. D1 datasheet and applies to devices meeting standard screening criteria.
What package type and marking does the 1N758A_T50R use?
The 1N758A_T50R uses a DO-35 glass axial package with cathode identified by a single color band. Marking consists of three lines: "F" logo, "58", and "A", conforming to Fairchild's top-marking specification for the 1N7xxA series.
What is the maximum power dissipation and thermal derating behavior of the 1N758A_T50R?
The 1N758A_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C. Above 75°C, it derates linearly at 4.0 mW/°C, reaching zero power capability at TL = 200°C - matching the absolute maximum operating temperature limit.
How does the dynamic impedance of the 1N758A_T50R affect regulation performance?
The 1N758A_T50R exhibits 17 Ω dynamic impedance at 20 mA, meaning a ±5 mA change in zener current causes approximately ±85 mV change in regulated voltage. This value directly determines load regulation error in unbuffered reference applications.
Is the 1N758A_T50R suitable for use in high-temperature environments?
Yes - the 1N758A_T50R is rated for operating and storage temperatures from -65°C to +200°C. Its DO-35 glass package and silicon die construction support reliable operation in extended industrial and under-hood automotive environments when thermal limits are observed.
1N758A_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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N758A_T50R FAQ
1.How can I place an order for 1N758A_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N758A_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 1N758A_T50R reliable?
The price and inventory of 1N758A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N758A_T50R is usually 5 days.
3.What payment methods are accepted for 1N758A_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N758A_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N758A_T50R?
1N758A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N758A_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 1N758A_T50R?
For technical support, including 1N758A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N758A_T50R requirements.
6.How does Aetrix verify that 1N758A_T50R is sourced from the original manufacturer or authorized distributors?
All 1N758A_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 1N758A_T50R meets industry standards.
7.What is the process for return or replacement of 1N758A_T50R?
All 1N758A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N758A_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 1N758A_T50R part is unused and in its original packaging.
Return procedure for 1N758A_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N758A_T50R Tags
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