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Taiwan Semiconductor Corporation 1N4740A A0G
- Part No.:
- 1N4740A A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740A A0G.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,625
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Product details
Overview
1N4740A A0G from Taiwan Semiconductor is a 1 W, 10 V ±5% glass-passivated Zener diode in DO-41 package, with typical zener impedance of 7 Ω at 25 mA test current, leakage current <0.25 μA at 7.6 V, and maximum junction temperature of 150°C - used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N4740A A0G datasheet, 1N4740A A0G pinout, 1N4740A A0G application, or 1N4740A A0G equivalent, key selection criteria include zener voltage tolerance (±5%), low dynamic impedance (7 Ω), thermal derating (6.67 mW/°C above 50°C), RoHS/halogen-free compliance, and AEC-Q101 qualification availability.
Technical Context
The 1N4740A A0G operates as a single-die, silicon planar Zener diode with glass-passivated junction for stable reverse breakdown and low leakage. Its DO-41 axial package enables through-hole mounting with pure tin-plated leads compliant to J-STD-002 solderability.
It delivers regulated 10 V reference under 25 mA DC test current (IZT), with zener impedance measured at 10% AC ripple superimposed on IZT at 1 kHz. Temperature coefficient is +2.5 mV/°C (typical) for nominal 10 V devices, supporting stable regulation across –55°C to +150°C junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.5 V at 25 mA - ensures tight 10 V regulation with ±5% tolerance for feedback accuracy |
| Power Dissipation (Ptot) | 1 W at TA = 50°C - defines maximum steady-state power handling before thermal derating applies |
| Zener Impedance (ZZT) | 7 Ω at IZT = 25 mA - enables low-output-impedance voltage reference for stable loop response |
| Leakage Current (IR) | <0.25 μA at VR = 7.6 V - minimizes error current in high-impedance bias networks |
| Junction Temperature (TJ) | –55°C to +150°C - supports operation in automotive under-hood and industrial environments |
| Surge Current (ISURGE) | 454 mA (non-repetitive, 1/120 s) - withstands transient overvoltage events without degradation |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, glass-passivated, RoHS/halogen-free molding compound rated UL 94V-0. Cathode indicated by band; weight ≈0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail; clamps voltage to 10 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term VZ drift & low IR vs. epoxy-passivated alternatives |
| Built-in strain relief | Reduces mechanical stress on bond wires during board flexure or thermal cycling |
| Low inductance construction | Supports fast transient suppression (<10 ns rise time) in ESD/clamp circuits |
| AEC-Q101 qualified variant available | Validated for automotive-grade reliability (HTOL, TC, HAST, UHAST) |
| Pure tin plating (J-STD-002) | Ensures consistent wetting and void-free solder joints in automated assembly |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Regulates output voltage in flyback converter feedback path using optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 10 V threshold for error amplifier comparison. Use Value: ±5% VZ tolerance and 7 Ω impedance maintain ±1% output regulation across line/load/temperature. |
Use Scenario: Protects 3.3 V GPIO pins from accidental 12 V misconnection or ESD transients. IC Role / Device Role / Timing Role: Low-leakage (0.25 μA) clamp limiting pin voltage to 10 V before damage occurs. Use Value: Fast response and low capacitance (<2 pF at 0 V) avoid signal integrity degradation on high-speed lines. |
| Industrial Sensor Excitation Reference | Automotive Battery Monitoring Divider |
Use Scenario: Supplies stable excitation voltage to resistive bridge sensors in 4–20 mA transmitter modules. IC Role / Device Role / Timing Role: Precision 10 V reference source with low tempco (+2.5 mV/°C) for ratiometric measurement. Use Value: TJ range (–55°C to +150°C) and low IR ensure accuracy over full industrial ambient range. |
Use Scenario: Scales 12–16 V battery voltage to ADC input range in vehicle body control module. IC Role / Device Role / Timing Role: High-surge-current capability (454 mA) absorbs load dump spikes per ISO 7637-2. Use Value: AEC-Q101-qualified variants support automotive qualification; DO-41 allows manual rework in legacy designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A-T (ON Semiconductor) | Same 10 V ±5%, 1 W rating, but epoxy-passivated junction; higher typical IR (1 μA @ 7.6 V) | Lacks glass passivation; less stable long-term VZ drift in humid environments | Select for cost-sensitive consumer applications where long-term stability is secondary |
| BZX55C10 (Vishay) | 10 V ±5%, 500 mW rating; DO-35 package; higher ZZT (20 Ω @ 5 mA); no AEC-Q101 option | Lower power rating limits use in >500 mW regulation; smaller DO-35 footprint not drop-in | Choose only if space-constrained PCB layout requires DO-35 and thermal load ≤500 mW |
Compared with 1N4740A A0G, the ON Semiconductor 1N4740A-T offers identical electrical specs but reduced environmental robustness, while Vishay BZX55C10 trades power handling and package compatibility for smaller size - neither is pin-compatible nor direct replacement without layout or thermal redesign.
Availability
1N4740A A0G is available at Aetrix Electronics and suitable for switching power supplies, microcontroller I/O protection, industrial sensor references, and automotive battery monitoring requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for 1N4740A A0G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, automotive, and consumer markets since 1979.
The 1N47xxA series was designed specifically for high-reliability voltage regulation and transient protection in cost-sensitive, high-volume power management applications - emphasizing process-controlled VZ tolerance, thermal robustness, and RoHS/halogen-free compliance.
FAQ
What is the exact zener voltage tolerance for 1N4740A A0G?
The 1N4740A A0G has a nominal zener voltage of 10 V with a guaranteed tolerance of ±5%, meaning the actual VZ falls between 9.5 V and 10.5 V when measured at 25 mA test current and 30°C lead temperature. This tolerance is standard across all 1N47xxA devices per JEDEC registration and is confirmed in the Electrical Characteristics table of the Taiwan Semiconductor datasheet revision O2104.
Is 1N4740A A0G suitable for automotive applications?
The 1N4740A A0G itself is not AEC-Q101 qualified, but Taiwan Semiconductor offers an AEC-Q101-qualified variant designated as 1N4740AH or 1N4740AHA0G. For automotive use, specify the "H" suffix part number. The 1N4740A A0G shares identical electrical and thermal specs but lacks the extended reliability testing required for automotive grade.
What is the maximum non-repetitive surge current rating for 1N4740A A0G?
The 1N4740A A0G has a maximum non-repetitive peak surge current of 454 mA for a 1/120 second (8.3 ms) half-sine pulse, as specified in the Electrical Characteristics table. This rating assumes the device is mounted on a 5 mm × 5 mm copper pad and is validated per JEDEC standards for transient overvoltage immunity.
Does 1N4740A A0G have halogen-free and RoHS-compliant construction?
Yes, the 1N4740A A0G uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant. The package meets UL 94V-0 flammability rating, and terminals feature pure tin plating qualified to J-STD-002 for solderability - all confirmed in the Mechanical Data and Compliance sections of the official Taiwan Semiconductor datasheet.
What is the thermal derating behavior of 1N4740A A0G above 50°C ambient?
The 1N4740A A0G derates linearly at 6.67 mW/°C above 50°C ambient temperature when mounted on a 5 mm × 5 mm Cu pad. At 75°C ambient, its usable power dissipation drops to 833 mW; at 125°C, it falls to 500 mW. This derating curve is defined in the Absolute Maximum Ratings table and must be applied in thermal design.
1N4740A A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4740A A0G FAQ
1.How can I place an order for 1N4740A A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740A A0G 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 1N4740A A0G reliable?
The price and inventory of 1N4740A A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740A A0G is usually 5 days.
3.What payment methods are accepted for 1N4740A A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740A A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740A A0G?
1N4740A A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740A A0G 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 1N4740A A0G?
For technical support, including 1N4740A A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740A A0G requirements.
6.How does Aetrix verify that 1N4740A A0G is sourced from the original manufacturer or authorized distributors?
All 1N4740A A0G 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 1N4740A A0G meets industry standards.
7.What is the process for return or replacement of 1N4740A A0G?
All 1N4740A A0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740A A0G, 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 1N4740A A0G part is unused and in its original packaging.
Return procedure for 1N4740A A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740A A0G Tags
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