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Microchip Technology 1N5229C/TR
- Part No.:
- 1N5229C/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5229C/TR.pdf
- Description:
- DIODE ZENER 4.3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,751
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Product details
Overview
1N5229C/TR from Microsemi is a 4.3 V, ±2% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 22 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog reference and bias circuits.
For engineers reviewing the 1N5229C/TR datasheet, 1N5229C/TR pinout, 1N5229C/TR application, or 1N5229C/TR equivalent, this part serves as a stable, temperature-compensated shunt regulator in space-constrained through-hole designs requiring tight voltage accuracy and MIL-qualified screening options.
Technical Context
This Zener operates in reverse breakdown with cathode-banded polarity, delivering regulated output by maintaining constant voltage across its terminals under varying load current within 0.25–20 mA operating range. Its 22 Ω Zener impedance at 20 mA ensures minimal voltage deviation during transient load changes.
The device exhibits a +/−0.055 %/°C temperature coefficient and supports operation from −65°C to +175°C, with thermal resistance of 250 °C/W junction-to-lead (3/8″ lead length), enabling reliable performance in high-reliability industrial and aerospace environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.3 V @ 20 mA - precise regulation point for low-voltage reference rails |
| Zener Tolerance | ±2% (C suffix) - tighter than standard ±5% (B) or ±10% (A), reducing calibration margin |
| Power Dissipation | 500 mW at 25°C - defines maximum continuous power handling before thermal derating |
| Zener Impedance | 22 Ω @ IZT = 20 mA - low dynamic resistance improves regulation stability under load variation |
| Reverse Current | 5.0 μA @ VR = 1.0 V - low leakage preserves battery life in always-on monitoring circuits |
| Temp Coefficient | +/-0.055 %/°C - enables predictable drift compensation in wide-temperature applications |
| Package | DO-35 (DO-204AH) glass axial-leaded - hermetically sealed, RoHS-compliant (e3), with band-marked cathode |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package: hermetically sealed, tin-lead or matte-tin plated leads, cathode indicated by color band; weight 0.2 g; mechanical dimensions per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; forward voltage ≤1.5 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node; regulates voltage when reverse-biased above 4.3 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener tolerance (C suffix) | Reduces need for post-production trimming in precision voltage references |
| Low 22 Ω dynamic impedance | Maintains <±10 mV output shift over 5–20 mA load current range |
| −65°C to +175°C operating range | Supports deployment in engine control units and downhole instrumentation without derating |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU without lead-free reflow compatibility compromises |
Applications
| Industrial Sensor Signal Conditioning | Avionics Power Supply Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for strain-gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 4.3 V bias independent of supply ripple. Use Value: Enables 0.1% full-scale measurement accuracy despite ±15% input rail variation. |
Use Scenario: Generating stable reference for ADCs in flight-control system power monitors. IC Role / Device Role / Timing Role: Precision Zener regulator feeding voltage reference input of 12-bit SAR ADC. Use Value: Limits reference drift to <±0.5 mV over −55°C to +125°C, preserving ENOB ≥11.2 bits. |
| Military Radio Bias Networks | Medical Infusion Pump Voltage Monitoring |
Use Scenario: Setting gate bias for RF power amplifiers in handheld tactical radios. IC Role / Device Role / Timing Role: Temperature-stable Zener establishing DC operating point for GaAs FET stages. Use Value: Maintains amplifier gain flatness within ±0.3 dB across military temperature range. |
Use Scenario: Monitoring battery voltage in Class IIa infusion pumps with ISO 60601-1 compliance. IC Role / Device Role / Timing Role: Low-leakage shunt regulator enabling accurate 4.3 V threshold detection for low-battery alarm. Use Value: 5.0 μA max reverse current prevents >1 μA parasitic drain on primary Li-MnO₂ cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V nominal, ±5% tolerance, 1.0 W power rating, DO-41 package | Higher voltage and power; requires PCB layout change due to larger DO-41 footprint | Select when 5.1 V regulation and higher surge capability are required; not drop-in for 4.3 V designs |
| BZX55C4V3 | 4.3 V nominal, ±5% tolerance, 500 mW, DO-35 package, different Zener impedance (30 Ω) | Looser tolerance increases calibration burden; same mechanical fit but higher dynamic impedance | Acceptable where ±5% regulation is sufficient and cost sensitivity outweighs precision needs |
Compared with 1N5229C/TR, 1N4733A offers higher power and voltage but incompatible pin spacing and regulation point, while BZX55C4V3 shares the DO-35 form factor and voltage but sacrifices ±2% accuracy and delivers 30 Ω vs. 22 Ω Zener impedance-critical for low-noise analog references.
Availability
1N5229C/TR is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, avionics power supply reference, and medical infusion pump voltage monitoring requiring stable component supply and long-term obsolescence management.
Supply support for 1N5229C/TR 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xx series was designed as a JEDEC-registered family of precision Zener diodes targeting applications demanding tight voltage tolerance, wide temperature operation, and MIL-qualified screening options in compact axial-leaded packages.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5229C/TR?
The 1N5229C/TR has a nominal Zener voltage of 4.3 V with a guaranteed tolerance of ±2%, as indicated by the "C" suffix. This tolerance is tighter than the ±5% (B suffix) and ±10% (A suffix) variants in the same family, making it suitable for precision reference applications where calibration margin must be minimized.
What package type and marking does the 1N5229C/TR use?
The 1N5229C/TR uses the DO-35 (DO-204AH) glass axial-leaded package with cathode identified by a color band. It is marked with the full part number "1N5229C" and complies with RoHS requirements via the "e3" suffix. The "TR" denotes tape-and-reel packaging per EIA-296 standard.
What is the maximum power dissipation and thermal resistance of the 1N5229C/TR?
The 1N5229C/TR is rated for 500 mW power dissipation at 25°C ambient, with thermal resistance of 250 °C/W junction-to-lead (measured at 3/8″ lead length). Derating begins above 25°C, reaching zero power at 175°C case temperature, per the published power derating curve.
How does the temperature coefficient of the 1N5229C/TR affect its performance?
The 1N5229C/TR has a temperature coefficient of ±0.055 %/°C, meaning its Zener voltage shifts by approximately ±0.24 mV/°C around 4.3 V. This low drift enables stable operation across −65°C to +175°C, critical for applications like downhole sensors and avionics where thermal gradients are extreme.
Is the 1N5229C/TR suitable for military-grade applications?
Yes-the 1N5229C/TR can be ordered with military screening prefixes (e.g., MV1N5229C/TR for JANTXV level) per MIL-PRF-19500, supporting applications requiring enhanced reliability, lot traceability, and extended temperature validation. Standard commercial versions meet JEDEC 1N5221–1N5281B registration.
1N5229C/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5229C/TR FAQ
1.How can I place an order for 1N5229C/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5229C/TR 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 1N5229C/TR reliable?
The price and inventory of 1N5229C/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5229C/TR is usually 5 days.
3.What payment methods are accepted for 1N5229C/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5229C/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5229C/TR?
1N5229C/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5229C/TR 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 1N5229C/TR?
For technical support, including 1N5229C/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5229C/TR requirements.
6.How does Aetrix verify that 1N5229C/TR is sourced from the original manufacturer or authorized distributors?
All 1N5229C/TR 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 1N5229C/TR meets industry standards.
7.What is the process for return or replacement of 1N5229C/TR?
All 1N5229C/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5229C/TR, 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 1N5229C/TR part is unused and in its original packaging.
Return procedure for 1N5229C/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5229C/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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