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Taiwan Semiconductor Corporation 1N5231B A0G
- Part No.:
- 1N5231B A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5231B A0G.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,236
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Product details
Overview
1N5231B A0G from Taiwan Semiconductor is a 5.1 V, ±5% tolerance, 500 mW hermetically sealed glass Zener diode in DO-35 package, tested at 20 mA with 17 Ω dynamic impedance and 5 µA leakage current at 2.0 V reverse bias-used for precision low-voltage reference and stabilization in DC/DC converters and lighting circuits.
For engineers reviewing the 1N5231B A0G datasheet, 1N5231B A0G pinout, 1N5231B A0G application, or 1N5231B A0G equivalent, key selection criteria include Zener voltage accuracy, thermal stability up to +200°C junction temperature, DO-35 mechanical compatibility, and compliance with RoHS and J-STD-002 solderability standards.
Technical Context
The 1N5231B A0G operates as a single-die, silicon-based Zener diode with sharp reverse breakdown at nominal 5.1 V under 20 mA test current. Its 17 Ω Zener impedance (ZZT) and 1.1 V forward voltage at 200 mA support stable regulation in low-power analog references and feedback paths.
Designed for thermal equilibrium operation, it maintains specified VZ within ±5% tolerance across -65°C to +200°C junction range. The DO-35 glass package ensures hermetic sealing and polarity indication via cathode band, enabling reliable use in ambient temperatures up to +175°C with derated power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal, ±5% tolerance - defines precise clamping/reference level in feedback networks |
| Test Current (IZT) | 20 mA - standard operating point for guaranteed VZ and impedance specification |
| Zener Impedance (ZZT) | 17 Ω at IZT - ensures minimal voltage variation under load changes in regulation circuits |
| Power Dissipation (PD) | 500 mW - maximum steady-state power handling at 25°C ambient, derates linearly above |
| Leakage Current (IR) | 5 µA at VR = 2.0 V - confirms low off-state conduction for accurate low-current biasing |
| Junction Temperature (TJ) | -65°C to +200°C - supports operation in high-reliability industrial and automotive under-hood environments |
| Forward Voltage (VF) | 1.1 V at IF = 200 mA - enables predictable forward conduction for dual-direction protection or clamp designs |
Pinout & Package
DO-35 glass axial package with cathode indicated by a painted band; leads are pure tin plated and solderable per J-STD-002. Total weight: 101.67 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input voltage source; reverse-biased to maintain regulated output voltage |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid or harsh environments |
| ±5% Zener voltage tolerance | Enables consistent performance without post-production trimming in cost-sensitive applications |
| RoHS compliant materials | Meets global environmental regulations for lead-free assembly and end-of-life disposal |
| DO-35 mechanical standardization | Ensures compatibility with legacy automated insertion equipment and hand-soldering workflows |
Applications
| Voltage Reference for Op-Amp Circuits | Low-Power Shunt Regulator in DC/DC Converters |
|---|---|
Use Scenario: Providing stable 5.1 V reference to instrumentation amplifier bias networks and ADC voltage references. IC Role / Device Role / Timing Role: Precision voltage reference element establishing fixed bias point independent of supply variation. Use Value: Delivers <±0.255 V deviation over temperature and life, supporting 12-bit+ measurement accuracy. | Use Scenario: Shunt regulation in isolated flyback or buck-derived auxiliary rails powering control ICs. IC Role / Device Role / Timing Role: Passive voltage clamp maintaining output within 5.1 V ±5% under light-load conditions. Use Value: Eliminates need for active LDO in low-current auxiliary supplies, reducing BOM count and quiescent loss. |
| LED Current Regulation Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting reference voltage for constant-current LED driver IC feedback loops in architectural lighting. IC Role / Device Role / Timing Role: Zener-defined threshold determining LED string current setpoint. Use Value: Enables tight current matching (<3%) across multiple LED channels using single-resistor scaling. | Use Scenario: Clamping transient surges on 5 V logic rails in industrial controllers exposed to ESD or inductive kick. IC Role / Device Role / Timing Role: Fast-acting overvoltage limiter diverting excess energy to ground before IC damage. Use Value: Responds within nanoseconds to transients >5.4 V, protecting downstream 5 V tolerant logic inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V nominal, ±5%, 1.0 W PD, DO-41 package | Higher power rating but larger footprint; requires PCB layout change | Select when >500 mW continuous dissipation is required and DO-41 mounting is acceptable |
| BZX55-C5V1 | 5.1 V nominal, ±5%, 500 mW, DO-35 package, tighter ZZT distribution | Same mechanical fit; slightly improved impedance consistency in volume production | Choose for high-yield manufacturing where batch-to-batch Zener impedance variance must be minimized |
Compared with 1N4733A and BZX55-C5V1, the 1N5231B A0G offers identical DO-35 form factor and thermal robustness to +200°C, but with lower cost and broader availability in ammo-pack formats-ideal for space-constrained, thermally demanding, and high-volume consumer electronics designs.
Availability
1N5231B A0G is available at Aetrix Electronics and suitable for low-voltage stabilization, precision reference generation, and overvoltage clamping applications requiring stable component supply across industrial automation, LED lighting, and embedded power management systems.
Supply support for 1N5231B 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 semiconductor manufacturer specializing in discrete power devices, rectifiers, and Zener diodes with global distribution and AEC-Q200 qualified product lines.
The 1N52xxB series was designed specifically for cost-effective, high-reliability voltage reference and stabilization in consumer, industrial, and automotive auxiliary power circuits-emphasizing tight tolerance, hermetic sealing, and thermal resilience.
FAQ
What is the Zener voltage tolerance of the 1N5231B A0G?
The 1N5231B A0G has a nominal Zener voltage of 5.1 V with a guaranteed tolerance of ±5%, meaning the actual measured VZ falls between 4.845 V and 5.355 V when tested at 20 mA under thermal equilibrium conditions. This tolerance is maintained across the full operating junction temperature range of -65°C to +200°C, as specified in Taiwan Semiconductor's H2301 datasheet revision.
Is the 1N5231B A0G RoHS compliant and lead-free?
Yes, the 1N5231B A0G is RoHS compliant and manufactured with lead-free materials. Its pure tin-plated leads meet J-STD-002 solderability requirements, and the hermetically sealed glass DO-35 package contains no restricted substances above EU RoHS thresholds. Compliance documentation is available upon request from Taiwan Semiconductor's official product declarations.
What is the maximum power dissipation of the 1N5231B A0G at 75°C ambient?
At 75°C ambient temperature, the 1N5231B A0G's maximum power dissipation is derated to approximately 375 mW. This is calculated using the standard linear derating slope of 6.25 mW/°C above 25°C, based on its 500 mW rating at 25°C and 200°C maximum junction temperature. Derating ensures safe operation without exceeding TJ(max) under continuous DC stress.
Does the 1N5231B A0G have a specified Zener impedance at low currents?
The 1N5231B A0G specifies Zener impedance (ZZT) as 17 Ω at the standard test current of 20 mA. While not explicitly characterized at lower currents in the datasheet, its ZZK (knee impedance) is 1600 Ω at IZK = 0.25 mA, indicating significantly higher dynamic resistance near the knee-making it unsuitable for regulation below ~5 mA without additional buffering or compensation.
Can the 1N5231B A0G replace the 1N5231B R0G in the same PCB footprint?
Yes, the 1N5231B A0G can directly replace the 1N5231B R0G on the same PCB footprint. Both share identical DO-35 packaging, electrical specifications, and mechanical dimensions; the only difference is packaging format-A0G denotes 5,000-piece ammo box, while R0G denotes 10,000-piece reel. No layout or soldering process changes are required.
1N5231B A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5231B A0G FAQ
1.How can I place an order for 1N5231B A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5231B 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 1N5231B A0G reliable?
The price and inventory of 1N5231B A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5231B A0G is usually 5 days.
3.What payment methods are accepted for 1N5231B A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5231B A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5231B A0G?
1N5231B A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5231B 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 1N5231B A0G?
For technical support, including 1N5231B A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5231B A0G requirements.
6.How does Aetrix verify that 1N5231B A0G is sourced from the original manufacturer or authorized distributors?
All 1N5231B 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 1N5231B A0G meets industry standards.
7.What is the process for return or replacement of 1N5231B A0G?
All 1N5231B A0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N5231B 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 1N5231B A0G part is unused and in its original packaging.
Return procedure for 1N5231B A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5231B A0G Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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