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onsemi 1N758A_T50A
- Part No.:
- 1N758A_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N758A_T50A.pdf
- Description:
- DIODE ZENER 10V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,001
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Product details
Overview
1N758A_T50A from Fairchild Semiconductor is a 10 V, 5% tolerance, 500 mW glass-encapsulated Zener diode in DO-35 package, rated for 35 mA maximum zener current at 25°C and 0.1 µA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the 1N758A_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (9.5–10.5 V), thermal derating (4.0 mW/°C above 75°C), junction temperature range (–65 to +200°C), and DO-35 mechanical compatibility with legacy through-hole designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and input conditions. Its 10 V nominal zener voltage is specified at 20 mA test current with 17 Ω dynamic impedance, enabling predictable regulation in feedback paths and reference nodes.
The device features a glass-passivated DO-35 package with cathode band marking, supports operation up to +200°C storage temperature, and exhibits only 0.1 µA reverse leakage at 1 V - critical for low-quiescent-current bias networks and battery-powered sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.5 V @ IZ = 20 mA; defines stable regulation point for reference or clamp applications |
| Dynamic Impedance (ZZ) | 17 Ω @ IZ = 20 mA; determines output voltage variation under load changes |
| Max Zener Current (IZM) | 35 mA @ TL ≤ 75°C; sets absolute DC current limit before thermal runaway |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C; defines safe operating envelope with linear derating above 75°C |
| Reverse Leakage (IR) | 0.1 µA @ VR = 1 V; ensures minimal error current in high-impedance reference dividers |
| Operating Temp Range | –65°C to +200°C; enables use in automotive under-hood, industrial, and aerospace environments |
| Tolerance | ±5%; guarantees voltage accuracy without post-manufacture trimming |
Pinout & Package
DO-35 glass axial package with cathode indicated by a single color band on the body; leads are tinned copper, 3/8″ length standard for thermal testing per JEDEC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown reference node | Connected to lower potential side; forms regulated voltage drop when cathode is biased positive |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connected to higher potential side to enable reverse-biased regulation |
Key Features
| Feature | Design Value |
|---|---|
| Stable 10 V reference | Guaranteed 9.5–10.5 V range at 20 mA enables direct replacement in legacy 10 V regulator designs |
| Low dynamic impedance | 17 Ω ensures <17 mV output shift per 1 mA load change - suitable for precision analog feedback |
| High-temperature capability | –65°C to +200°C operation supports under-hood automotive and downhole industrial use |
| Low leakage current | 0.1 µA at 1 V minimizes error in high-Z voltage dividers and battery-monitoring circuits |
| Standard DO-35 footprint | Enables drop-in replacement in existing through-hole PCB layouts without rework |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 10 V reference for op-amp comparators and ADC voltage references in industrial PLC modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in parallel with load. Use Value: ±5% tolerance and 17 Ω ZZ ensure reference drift remains below 0.5% over 0–30 mA load range. |
Use Scenario: Protecting microcontroller I/O pins from transient surges in 12 V automotive sensor interfaces. IC Role / Device Role / Timing Role: Shunt clamping device limiting voltage to ≤10.5 V during ESD or load dump events. Use Value: 35 mA IZM and 500 mW PD allow sustained clamping of 350 mW transients without failure. |
| Temperature-Stable Bias Network | Low-Power Sensor Excitation |
Use Scenario: Generating bias voltage for thermistor-based temperature sensing circuits in HVAC control units. IC Role / Device Role / Timing Role: Precision voltage source establishing known excitation level across resistive sensors. Use Value: –65°C to +200°C rating ensures stable 10 V output across full environmental range. |
Use Scenario: Supplying regulated excitation voltage to piezoresistive pressure sensors in portable medical devices. IC Role / Device Role / Timing Role: Low-leakage shunt reference maintaining accuracy in µA-level sensor bias paths. Use Value: 0.1 µA IR prevents >1 mV error in 10 kΩ sensor bridges at room temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A (ON Semiconductor) | 10 V nominal, ±5%, 1000 mW, DO-41 package, 17 Ω ZZ, 23 mA IZM at 25°C | Higher power rating but larger DO-41 footprint; requires PCB layout change | Select when higher surge energy handling is required and board space permits larger package |
| BZX55C10 (Vishay) | 10 V nominal, ±5%, 500 mW, DO-35 package, 20 Ω ZZ, 34 mA IZM, 0.1 µA IR | Nearly identical electrical specs and DO-35 mechanical form; minor ZZ variance | Preferred for new designs requiring second-source availability with same footprint and performance |
Compared with 1N758A_T50A, the 1N4740A offers double power dissipation but demands DO-41 layout revision, while the BZX55C10 delivers functionally identical regulation in the same DO-35 package - making it the most seamless alternative for continuity and dual-sourcing.
Availability
1N758A_T50A is available at Aetrix Electronics and suitable for industrial control systems, automotive sensor interfaces, and portable medical instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for 1N758A_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 portfolio remains widely deployed in industrial and automotive systems.
The 1N758A_T50A belongs to Fairchild's 1N7xxA series of general-purpose Zener diodes designed for cost-sensitive, high-reliability voltage reference and protection functions in legacy through-hole applications.
FAQ
What is the exact zener voltage range for 1N758A_T50A at 20 mA?
The 1N758A_T50A has a guaranteed zener voltage range of 9.5 V to 10.5 V when tested at 20 mA and 25°C ambient, reflecting its ±5% tolerance specification. This range is validated per Fairchild's Rev. D1 datasheet and applies directly to the 1N758A_T50A marking variant with DO-35 packaging and glass encapsulation.
Does 1N758A_T50A support operation above 125°C?
Yes, the 1N758A_T50A is rated for junction and storage temperatures from –65°C to +200°C. Its electrical characteristics remain valid across this full range, and power dissipation must be linearly derated at 4.0 mW/°C above 75°C ambient - allowing reliable use in under-hood automotive or industrial furnace monitoring where ambient exceeds 125°C.
Is the 1N758A_T50A pin-compatible with other DO-35 Zeners like 1N4740A?
No - while both 1N758A_T50A and 1N4740A are axial Zeners, they differ in package: 1N758A_T50A uses DO-35 (2.0 × 5.2 mm), whereas 1N4740A uses DO-41 (2.7 × 5.2 mm). Mechanical incompatibility prevents direct PCB substitution without layout modification, despite similar 10 V regulation.
What is the maximum reverse leakage current for 1N758A_T50A?
The maximum reverse leakage current for 1N758A_T50A is 0.1 µA at VR = 1 V and TA = 25°C, as specified in Fairchild's official datasheet. This low leakage ensures minimal loading in high-impedance reference networks and contributes to stable biasing in battery-powered sensor circuits using the 1N758A_T50A.
Can 1N758A_T50A be used in surface-mount designs?
No - the 1N758A_T50A is exclusively available in the through-hole DO-35 glass axial package. It lacks SMD variants such as SOD-123 or SOD-323. For surface-mount equivalents, designers should consider alternatives like BZX84-C10 or MMBZ5240B, which are not functionally or mechanically interchangeable with the 1N758A_T50A.
1N758A_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):
- 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_T50A FAQ
1.How can I place an order for 1N758A_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N758A_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 1N758A_T50A reliable?
The price and inventory of 1N758A_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N758A_T50A is usually 5 days.
3.What payment methods are accepted for 1N758A_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N758A_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N758A_T50A?
1N758A_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N758A_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 1N758A_T50A?
For technical support, including 1N758A_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N758A_T50A requirements.
6.How does Aetrix verify that 1N758A_T50A is sourced from the original manufacturer or authorized distributors?
All 1N758A_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 1N758A_T50A meets industry standards.
7.What is the process for return or replacement of 1N758A_T50A?
All 1N758A_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N758A_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 1N758A_T50A part is unused and in its original packaging.
Return procedure for 1N758A_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N758A_T50A Tags
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