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Microchip Technology 1N6355US/TR
- Part No.:
- 1N6355US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6355US/TR.pdf
- Description:
- DIODE ZENER 200V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,963
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Product details
Overview
1N6355US/TR from Microsemi is a hermetically sealed, voidless-glass MELF Zener diode rated for 200 V nominal Zener voltage at 1.8 mA test current, 0.5 W power dissipation at 150 °C end-cap temperature, 2.1 Ω dynamic impedance at IZ2, and ±5% voltage tolerance-designed for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N6355US/TR datasheet, 1N6355US/TR pinout, 1N6355US/TR application, or 1N6355US/TR equivalent, this part serves as a military-qualified (MIL-PRF-19500/533 JANS-level) surface-mount Zener regulator with radiation-hardened construction, ESD immunity per MIL-STD-750 Method 1020, and stable operation from –65 °C to +175 °C junction temperature.
Technical Context
This device operates as a precision shunt voltage reference in reverse-biased breakdown mode, with Zener voltage specified at IZ2 = 1.8 mA and characterized down to IZK = 250 µA. Its low dynamic impedance (2.1 Ω at IZ2) and tight voltage regulation (ΔVZ = 12.00 V over 10–50% IZM) support stable regulation across wide current and temperature ranges.
The 1N6355US/TR uses a tungsten-slug, voidless-glass hermetic package with copper end caps and tin/lead finish, achieving RθJEC = 21 °C/W (junction-to-end-cap) and RθJA = 240 °C/W (junction-to-ambient on FR4 PCB), enabling reliable thermal performance in conduction-cooled military avionics subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 200.0 V nominal at IZ2 = 1.8 mA - defines precise regulation point for high-voltage reference circuits |
| Power Dissipation (PD) | 0.5 W at TEC = 150 °C - sets maximum continuous DC power handling under end-cap thermal constraint |
| Dynamic Impedance (ZZT) | 2.1 Ω at IZ2 = 1.8 mA - ensures minimal output voltage variation under load current changes |
| Max Regulator Current (IZM) | 1.8 mA - determines upper limit of stable Zener operating current before thermal runaway risk |
| Junction Temp Range (TJ) | –65 °C to +175 °C - enables deployment in extreme-environment platforms including space-grade power supplies |
| Reverse Leakage (IR1) | 10 µA max at VR = 152 V, 25 °C - guarantees low standby power loss in high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.110 %/°C - quantifies positive drift rate requiring compensation in precision analog references |
Pinout & Package
Hermetically sealed voidless glass MELF ("D") package with copper end caps (tin/lead finish), cathode indicated by band. Dimensions: BD = 0.070–0.085 in (1.78–2.16 mm), BL = 0.165–0.195 in (4.19–4.95 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lowest potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 200 V reference voltage relative to anode; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture ingress-critical for 20+ year mission life in vacuum/space environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability between silicon die and tungsten slug in 1N6355US |
| MIL-PRF-19500/533 qualification | Validated to JAN/JANTXV/JANS levels-meets screening, testing, and traceability requirements for flight-critical hardware |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050-no derating needed for LEO/MEO missions |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020-enables safe handling without special grounding protocols |
Applications
| Aerospace Power Bus Regulation | Satellite Payload Voltage Reference |
|---|---|
Use Scenario: Stabilizing unregulated 220 V bus in satellite power distribution unit under varying load and temperature. IC Role / Device Role / Timing Role: Shunt Zener regulator maintaining 200 V reference for DC-DC converter feedback loop. Use Value: Maintains <±0.5% output stability over –55 °C to +125 °C ambient using 2.1 Ω dynamic impedance and +0.110 %/°C tempco compensation. |
Use Scenario: Providing primary voltage reference for ADC biasing in star tracker electronics exposed to cosmic radiation. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source for precision analog front-end calibration. Use Value: Delivers stable 200 V reference with no parametric shift after 100 krad(Si) TID exposure per MicroNote 050. |
| Avionics Sensor Excitation | Military Radar Bias Supply |
Use Scenario: Supplying excitation voltage to piezoresistive pressure transducers in fighter jet engine control units. IC Role / Device Role / Timing Role: High-stability Zener source for ratiometric sensor bridge biasing. Use Value: Enables <0.01% full-scale error over 10,000-hour operational life due to hermetic voidless-glass construction and Category I bond. |
Use Scenario: Generating gate bias for GaN RF power amplifiers in ground-based radar transmitters operating at 125 °C case temperature. IC Role / Device Role / Timing Role: High-temperature-stable Zener clamp protecting amplifier gate drive circuitry. Use Value: Sustains regulation at 175 °C junction temperature with 0.5 W derated power and RθJEC = 21 °C/W thermal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6355DUS | Tighter ±1% Zener tolerance vs. ±5% for 1N6355US/TR; identical package, power rating, and temperature range | Required where absolute voltage accuracy >±1 V is mandated (e.g., metrology-grade calibration) | Select 1N6355DUS when tighter initial tolerance justifies higher cost; otherwise 1N6355US/TR suffices for general regulation |
| SMF200A | Surface-mount SOD-123 package (vs. MELF), 200 V standoff, 1 kW surge rating, but only 1 W peak power and no MIL-spec qualification | Suitable for commercial industrial controls but not qualified for aerospace or defense platforms requiring MIL-PRF-19500 screening | Choose SMF200A only for non-military cost-sensitive designs; 1N6355US/TR remains mandatory for JANS/JANTXV programs |
Compared with 1N6355DUS and SMF200A, the 1N6355US/TR uniquely combines MIL-qualified reliability, hermetic MELF packaging, and 200 V regulation in a single component-making it irreplaceable for flight-critical systems where failure is not an option.
Availability
1N6355US/TR is available at Aetrix Electronics and suitable for aerospace power regulation, satellite payload referencing, and avionics sensor excitation requiring stable component supply across extended product lifecycles.
Supply support for 1N6355US/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N6355US/TR belongs to Microsemi's legacy MIL-PRF-19500/533-qualified Zener diode family, engineered specifically for radiation-tolerant, long-life voltage regulation in mission-critical electronic systems.
FAQ
What is the Zener voltage tolerance for 1N6355US/TR?
The 1N6355US/TR has a standard ±5% Zener voltage tolerance at 25 °C, meaning its nominal 200 V Zener voltage falls within 190 V to 210 V under specified test conditions. Tighter tolerances (±1%, ±2%) are available under alternate part numbers like 1N6355DUS, but the /TR suffix denotes the standard 5% variant.
Is 1N6355US/TR qualified to MIL-PRF-19500/533 standards?
Yes, the 1N6355US/TR is fully qualified to MIL-PRF-19500/533 for JAN, JANTX, JANTXV, and JANS reliability levels. This includes rigorous environmental stress screening, lot acceptance testing, and traceability documentation required for use in U.S. Department of Defense and NASA programs.
What is the maximum operating junction temperature of 1N6355US/TR?
The 1N6355US/TR supports a junction temperature range of –65 °C to +175 °C. Its thermal resistance junction-to-end-cap is 21 °C/W, allowing safe operation at full 0.5 W power dissipation up to 150 °C end-cap temperature, with linear derating beyond that point per Figure 2.
Does 1N6355US/TR have radiation hardness certification?
Yes, the 1N6355US/TR exhibits inherent radiation hardness as documented in Microsemi MicroNote 050. It is qualified for total ionizing dose (TID) environments up to 100 krad(Si) without parameter degradation-making it suitable for low-Earth orbit and deep-space applications.
What package type does 1N6355US/TR use, and is it RoHS compliant?
The 1N6355US/TR uses a hermetically sealed voidless-glass MELF ("D") package with copper end caps and tin/lead finish. RoHS compliance is available only in commercial-grade versions (marked e3); the /TR suffix indicates the standard non-RoHS, military-qualified configuration with Sn/Pb termination.
1N6355US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, B
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1800 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 152 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
1N6355US/TR FAQ
1.How can I place an order for 1N6355US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6355US/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 1N6355US/TR reliable?
The price and inventory of 1N6355US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6355US/TR is usually 5 days.
3.What payment methods are accepted for 1N6355US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6355US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6355US/TR?
1N6355US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6355US/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 1N6355US/TR?
For technical support, including 1N6355US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6355US/TR requirements.
6.How does Aetrix verify that 1N6355US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6355US/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 1N6355US/TR meets industry standards.
7.What is the process for return or replacement of 1N6355US/TR?
All 1N6355US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6355US/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 1N6355US/TR part is unused and in its original packaging.
Return procedure for 1N6355US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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