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Microchip Technology 1N4135UR/TR
- Part No.:
- 1N4135UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4135UR/TR.pdf
- Description:
- DIODE ZENER 100V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,894
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Product details
Overview
1N4135UR/TR from Microsemi is a 100 V, ±5% tolerance, 0.5 W glass-encapsulated Zener diode in DO-213AA (SOD-80/MELF) surface-mount package, rated for -65°C to +175°C operation and used for precision voltage regulation in high-reliability power supply feedback and reference circuits.
For engineers reviewing the 1N4135UR/TR datasheet, 1N4135UR/TR pinout, 1N4135UR/TR application, or 1N4135UR/TR equivalent, key selection criteria include its 100 V nominal Zener voltage at 250 mA test current, 1500 Ω maximum Zener impedance, 0.01 μA maximum reverse leakage at 76 V, hermetically sealed MELF construction, and RoHS-compliant e3 marking with TR tape-and-reel packaging.
Technical Context
This Zener operates in reverse breakdown mode with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its thermal resistance is 150°C/W junction-to-end-cap and 300°C/W junction-to-ambient on FR4 with 1 oz Cu.
It delivers stable regulation across wide temperature extremes (-65°C to +175°C), exhibits low noise density (1 μV/√Hz typical at 25°C), and maintains minimal capacitance (≈5.1 pF per Figure 3) - critical for high-frequency stability in analog references and sensing front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 100 V at 250 mA test current - sets precise regulation point for high-voltage reference rails |
| Zener Tolerance | ±5% - defines worst-case output voltage deviation under production conditions |
| Power Dissipation | 0.5 W at TEC < 100°C - limits continuous thermal load without derating on standard PCBs |
| Zener Impedance | 1500 Ω max at 250 mA - determines AC regulation stiffness and ripple rejection capability |
| Reverse Leakage | 0.01 μA max at 76 V - ensures negligible current draw in standby or high-impedance bias networks |
| Operating Temperature | -65°C to +175°C - supports deployment in aerospace, downhole, and military environments |
| Noise Density | 1 μV/√Hz typical - enables use in low-noise analog references and precision instrumentation |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry; cathode identified by single black band; no discrete pins - terminals are metallized end caps soldered directly to PCB pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; Zener conducts when voltage exceeds 100 V, clamping downstream circuitry |
| Anode (unbanded end) | Reference return path | Connected to ground or lower-potential node; completes reverse-bias conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Radiation-hardened design | Inherently resistant to total ionizing dose (TID), per MicroNote 050 - suitable for space-grade applications |
| ESD immunity | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| RoHS-compliant finish | Tin-plated end caps meet lead-free soldering requirements without compromising wetting or reliability |
| Stable tempco | +0.095%/°C - enables predictable voltage shift over temperature for calibration-aware designs |
Applications
| High-Voltage Power Supply Feedback | Precision Analog Reference |
|---|---|
Use Scenario: Regulating output of isolated DC-DC converters operating above 60 V. IC Role / Device Role / Timing Role: Zener diode providing stable 100 V reference for optocoupler-based feedback loop. Use Value: Maintains ±5% output accuracy across -40°C to +125°C ambient while surviving 175°C end-cap temperatures during overload events. | Use Scenario: Generating a clean, low-drift reference for 16-bit ADCs in test equipment. IC Role / Device Role / Timing Role: Voltage reference element in buffered shunt regulator topology. Use Value: Delivers 1 μV/√Hz noise and <0.01 μA leakage - preserving ENOB and minimizing input bias error. |
| Aerospace Sensor Biasing | Military-Grade Overvoltage Protection |
Use Scenario: Biasing piezoresistive pressure transducers in flight control systems. IC Role / Device Role / Timing Role: Stable excitation source ensuring consistent sensor gain and offset over extreme thermal cycles. Use Value: Radiation hardness and -65°C to +175°C operation prevent calibration drift during stratospheric or re-entry thermal profiles. | Use Scenario: Clamping transient surges on 72 V vehicle power buses in armored vehicles. IC Role / Device Role / Timing Role: Primary shunt protector absorbing energy during ISO 7637-2 pulse 5a events. Use Value: Hermetic glass package withstands mechanical shock and humidity exposure where plastic-packaged Zeners fail prematurely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4135UR-1 | Includes internal metallurgical bond; qualified to JAN/JANTXV levels | Required for MIL-PRF-19500/515 certified programs | Select when full military qualification and enhanced bond reliability are mandated |
| BZX85C100 | Plastic DO-41 package; 100 V ±5%; 1.3 W rating; higher capacitance (~10 pF) | Suitable for commercial industrial supplies but not radiation- or hermeticity-critical use | Choose for cost-sensitive, non-mission-critical 100 V regulation with higher power margin |
Compared with 1N4135UR/TR, the 1N4135UR-1 adds military qualification and bond integrity for aerospace deployments, while BZX85C100 trades hermeticity and radiation hardness for higher power and lower cost in benign environments.
Availability
1N4135UR/TR is available at Aetrix Electronics and suitable for high-reliability power supply feedback, precision analog reference, and aerospace sensor biasing requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N4135UR/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, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N4135UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for stable voltage regulation in mission-critical systems where hermetic sealing, wide temperature range, and radiation tolerance are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4135UR/TR?
The 1N4135UR/TR has a nominal Zener voltage of 100 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet revision D. This tolerance applies under thermal equilibrium at 25°C with 250 mA test current and defines the guaranteed voltage range across manufacturing lots without suffix modification.
Does 1N4135UR/TR require heatsinking in standard PCB layouts?
No, the 1N4135UR/TR does not require external heatsinking when operated within its 0.5 W rating and mounted on FR4 with 1 oz copper using the recommended footprint. Its thermal resistance is 300°C/W junction-to-ambient, allowing safe operation up to 25°C ambient; derating begins above that per Figure 2 in the datasheet.
Is 1N4135UR/TR compatible with lead-free reflow processes?
Yes, the 1N4135UR/TR is RoHS-compliant (e3 suffix) and qualified for lead-free soldering at 260°C for 10 seconds maximum, per MIL-STD-750 Method 2026. Its annealed matte-tin plating ensures reliable wetting and intermetallic formation during standard reflow profiles.
What is the maximum reverse leakage current for 1N4135UR/TR?
The maximum reverse leakage current for 1N4135UR/TR is 0.01 μA at 76 V (76% of nominal Zener voltage), measured at 25°C. This ultra-low leakage supports high-impedance bias networks and minimizes power loss in battery-backed or low-quiescent-current designs.
Can 1N4135UR/TR be used in radiation-intensive environments?
Yes, the 1N4135UR/TR is inherently radiation-hardened per Microsemi MicroNote 050, making it suitable for low-dose-rate space applications and nuclear instrumentation. Its hermetic glass package and silicon process provide proven TID resilience without requiring additional shielding or derating.
1N4135UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 76 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4135UR/TR FAQ
1.How can I place an order for 1N4135UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4135UR/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 1N4135UR/TR reliable?
The price and inventory of 1N4135UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4135UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4135UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4135UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4135UR/TR?
1N4135UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4135UR/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 1N4135UR/TR?
For technical support, including 1N4135UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4135UR/TR requirements.
6.How does Aetrix verify that 1N4135UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4135UR/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 1N4135UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4135UR/TR?
All 1N4135UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4135UR/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 1N4135UR/TR part is unused and in its original packaging.
Return procedure for 1N4135UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4135UR/TR Tags
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