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Microchip Technology 1N4135-1
- Part No.:
- 1N4135-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4135-1.pdf
- Description:
- DIODE ZENER 100V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
1N4135-1 from Microsemi is a 500 mW, 100 V Zener voltage regulator diode in DO-35 glass package, qualified to JANS level per MIL-PRF-19500/435, with 1% voltage tolerance, 1600 Ω dynamic impedance at 250 mA, and max noise density of 1 µV/√Hz. It delivers stable reference voltage in high-reliability power supply regulation.
For engineers reviewing the 1N4135-1 datasheet, 1N4135-1 pinout, 1N4135-1 application, or 1N4135-1 equivalent, this page provides verified electrical specs, thermal derating behavior, Zener impedance vs. current, noise performance at 100 V, and mil-spec qualification details critical for aerospace, defense, and radiation-hardened designs.
Technical Context
The 1N4135-1 operates as a reverse-biased Zener diode with precise 100 V breakdown at 250 mA test current (IZT), exhibiting +0.100 %/°C temperature coefficient and 40 µA maximum reverse leakage at 76 V (VR). Its metallurgically bonded construction ensures low long-term drift and high reliability under thermal cycling.
Designed for operation up to +175 °C junction temperature, it features 250 °C/W junction-to-lead thermal resistance with 3/8″ lead length and linear power derating from 500 mW at 25 °C to zero at 175 °C - enabling predictable thermal management in sealed or conduction-cooled enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 100 V ±1% at 250 mA - enables precision 100 V reference generation with tight tolerance for calibration circuits. |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - defines safe continuous operating envelope under thermal stress. |
| Dynamic Impedance ZZT | 1600 Ω at 250 mA - indicates moderate regulation stiffness; suitable for low-current references but not high-precision shunt regulators. |
| Noise Density ND | 1 µV/√Hz at 100 V - ultra-low broadband noise ideal for sensitive analog references and metrology-grade voltage standards. |
| Reverse Leakage IR | ≤40 µA at 76 V - confirms sharp knee and low off-state conduction, critical for standby power integrity. |
| Temp Coefficient αVZ | +0.100 %/°C - predictable positive drift allows compensation in multi-Zener reference stacks. |
| Junction Temp Range | –65 °C to +175 °C - supports operation in extreme environments including space, downhole, and military avionics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Hermetically sealed, tin-lead or RoHS-compliant matte-tin plating, ~0.2 g weight, 1.0–1.5″ lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to circuit common; reverse bias applied between cathode and anode to activate Zener conduction. |
| Cathode | Zener regulation output | Banded end; supplies regulated 100 V when reverse biased; must be held >100 V above anode for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Internal metallurgical bond | Eliminates interfacial delamination risk under thermal shock and long-term bias, ensuring parameter stability over 20+ years. |
| JANS-level qualification | Meets MIL-PRF-19500/435 screening for radiation hardness, hermeticity, and burn-in - required for flight-critical systems. |
| Ultra-low noise density | 1 µV/√Hz at 100 V enables use in low-noise voltage references where 1/f and thermal noise dominate error budgets. |
| 1% voltage tolerance option | Reduces need for external trimming in precision power supplies and ADC/DAC reference chains. |
| Non-ESD-sensitive design | Passes MIL-STD-750 Method 1020 - simplifies handling in uncontrolled assembly environments without special grounding. |
Applications
| Aerospace Power Reference | Defense System Calibration |
|---|---|
Use Scenario: Providing stable 100 V reference in satellite power conditioning units where radiation tolerance and long-term drift are mission-critical. IC Role / Device Role / Timing Role: Zener diode acting as primary shunt voltage reference for DC-DC converter feedback and telemetry sensor excitation. Use Value: JANS qualification and +0.100 %/°C tempco allow predictable drift modeling across –55 °C to +125 °C operational range. | Use Scenario: Calibrating field-deployable test equipment used for radar transmitter bias verification requiring traceable 100 V reference. IC Role / Device Role / Timing Role: Precision Zener reference in portable calibration source with battery-backed operation and minimal self-heating. Use Value: 1 µV/√Hz noise density ensures <10 ppm RMS noise contribution to 100 V output, meeting MIL-STD-461E emission limits. |
| Nuclear Instrumentation | High-Voltage Industrial Control |
Use Scenario: Biasing photomultiplier tube (PMT) dynode chains in radiation detection systems operating in gamma-rich environments. IC Role / Device Role / Timing Role: High-voltage Zener clamp regulating dynode chain voltages while surviving total ionizing dose >100 krad(Si). Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in reactor monitoring hardware. | Use Scenario: Overvoltage protection and reference stabilization in industrial PLC analog I/O modules exposed to 4–20 mA loop transients. IC Role / Device Role / Timing Role: Shunt regulator maintaining 100 V rail integrity during ESD events and inductive kickback on 24 V control bus derivatives. Use Value: 40 µA leakage at 76 V ensures minimal standby current draw while clamping fast transients via low-capacitance DO-35 structure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4135UR-1 | Same 100 V Zener, DO-213AA surface-mount package; no axial leads; 1% tolerance retained. | Used where board space is constrained and reflow soldering replaces through-hole assembly. | Select 1N4135UR-1 when migrating to SMT layout or reducing mechanical stress on PCB from lead bending. |
| 1N4135-1e3 | Identical electrical specs and DO-35 package; RoHS-compliant matte-tin plating instead of tin-lead. | Required for commercial-grade designs targeting EU WEEE/RoHS compliance without mil-spec screening. | Choose 1N4135-1e3 only if RoHS compliance is mandatory and JAN/JANTXV/JANS qualification is not needed. |
Compared with 1N4135UR-1 and 1N4135-1e3, the 1N4135-1 offers legacy tin-lead termination and full mil-spec qualification path (JAN to JANS), making it the sole choice for programs requiring MIL-PRF-19500/435 conformance and through-hole reliability validation.
Availability
1N4135-1 is available at Aetrix Electronics and suitable for aerospace power reference, defense system calibration, nuclear instrumentation requiring stable component supply with full traceability and long-term obsolescence mitigation.
Supply support for 1N4135-1 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and mil-spec analog and mixed-signal components.
The 1N4135-1 belongs to Microsemi's legacy 1N4099–1N4135 Zener series designed specifically for high-stability, high-temperature, and high-radiation environments in defense, space, and nuclear applications.
FAQ
What is the Zener voltage tolerance for the 1N4135-1?
The 1N4135-1 has a nominal Zener voltage of 100 V with ±1% tolerance, confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tighter tolerance is achieved via post-process screening and applies under standard test conditions of 250 mA Zener test current and 25 °C ambient temperature. The 1N4135-1 achieves this spec without external trimming.
Does the 1N4135-1 meet MIL-PRF-19500/435 requirements?
Yes, the 1N4135-1 is qualified per MIL-PRF-19500/435 at JAN, JANTX, JANTXV, and JANS levels as stated in the DESCRIPTION section of the datasheet. Qualification includes hermeticity testing, temperature cycling, burn-in, and radiation hardness assurance per MicroNote 050 - all verified for the exact 1N4135-1 part number.
What is the maximum reverse leakage current for the 1N4135-1?
The 1N4135-1 exhibits ≤40 µA maximum reverse leakage current (IR) at VR = 76 V, as specified in the Electrical Characteristics table. This value reflects worst-case leakage near the regulation knee and is measured at 25 °C. At lower reverse voltages, leakage drops significantly - e.g., <0.01 µA below 50 V - supporting low-power standby modes in the 1N4135-1.
Can the 1N4135-1 be used in surface-mount designs?
No - the 1N4135-1 is exclusively packaged in the axial-leaded DO-35 (DO-204AH) glass case. For surface-mount compatibility, Microsemi offers the functionally identical 1N4135UR-1 in DO-213AA package. The 1N4135-1 requires through-hole mounting and cannot be reflowed or placed using SMT equipment without mechanical adaptation.
What is the thermal resistance junction-to-lead for the 1N4135-1?
The 1N4135-1 has a thermal resistance of 250 °C/W junction-to-lead when measured with 3/8″ (10 mm) lead length from the body, as listed in the Maximum Ratings table. This value assumes standard lead mounting and is critical for calculating junction temperature rise under load - for example, at 500 mW dissipation, ΔTJL = 125 °C, placing TJ at 150 °C when TL = 25 °C.
1N4135-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1600 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4135-1 FAQ
1.How can I place an order for 1N4135-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4135-1 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 1N4135-1 reliable?
The price and inventory of 1N4135-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4135-1 is usually 5 days.
3.What payment methods are accepted for 1N4135-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4135-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4135-1?
1N4135-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4135-1 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 1N4135-1?
For technical support, including 1N4135-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4135-1 requirements.
6.How does Aetrix verify that 1N4135-1 is sourced from the original manufacturer or authorized distributors?
All 1N4135-1 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 1N4135-1 meets industry standards.
7.What is the process for return or replacement of 1N4135-1?
All 1N4135-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4135-1, 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 1N4135-1 part is unused and in its original packaging.
Return procedure for 1N4135-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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