My Inquiry
My Account
Microchip Technology 1N6350US/TR
- Part No.:
- 1N6350US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6350US/TR.pdf
- Description:
- DIODE ZENER 120V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6350US/TR from Microsemi is a military-qualified, voidless hermetically sealed glass Zener diode with nominal Zener voltage 120 V ±5%, 0.5 W power rating, and 3.5 Ω dynamic impedance at 600 mA test current. It operates from –65 °C to +175 °C and is used in high-reliability voltage regulation for aerospace power conditioning and radiation-hardened instrumentation.
For engineers reviewing the 1N6350US/TR datasheet, 1N6350US/TR pinout, 1N6350US/TR application, or 1N6350US/TR equivalent, key selection criteria include its MIL-PRF-19500/533 qualification (JANTXV level), hermetic MELF package, tight thermal resistance (RθJEC = 21 °C/W), and low noise density (80 µV/√Hz) in critical analog sensing paths.
Technical Context
This device functions as a precision shunt voltage regulator in reverse-biased breakdown mode, maintaining stable output voltage across wide current (1.0–600 mA) and temperature (–65 °C to +175 °C) ranges. Its internal Category I metallurgical bond ensures mechanical robustness under shock/vibration, and inherent radiation hardness supports operation in space-grade systems per MicroNote 050.
Designed for DC voltage reference and overvoltage clamping, it exhibits low dynamic impedance (3.5 Ω at IZ2 = 600 mA) and minimal voltage regulation drift (∆VZ = 5.20 V between 10% and 50% IZM). The 1N6350US/TR is not intended for fast transient suppression but delivers stable regulation under steady-state load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±5% at 600 mA - defines precise regulation point for high-voltage bias networks |
| Power Dissipation (PD) | 0.5 W @ TEC = 150 °C - sets maximum continuous DC power handling in end-cap mounted configuration |
| Dynamic Impedance (ZZT) | 3.5 Ω @ 600 mA - determines output voltage stability under varying load current |
| Junction Temperature Range | –65 °C to +175 °C - enables deployment in extreme-environment avionics and downhole electronics |
| Thermal Resistance (RθJEC) | 21 °C/W - allows accurate thermal modeling when mounted to heat-conductive end caps |
| Noise Density | 80 µV/√Hz @ 250 µA, 1–3 kHz - critical for low-noise reference applications in precision ADC front-ends |
| Temp. Coefficient (αVZ) | +0.110 %/°C - quantifies positive drift of Zener voltage with rising temperature |
Pinout & Package
The 1N6350US/TR uses a hermetically sealed voidless glass MELF ("D") package with copper end caps (Sn/Pb 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 connection | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Reverse breakdown terminal / regulated output node | Provides stable 120 V reference when biased above VZ; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/533 JANTXV qualification | Guarantees screening, testing, and traceability for mission-critical aerospace programs |
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture ingress over 20+ year service life |
| Category I internal metallurgical bond | Ensures mechanical integrity under 100 g shock and 20 g RMS vibration per MIL-STD-883 |
| Radiation hardness (per MicroNote 050) | Supports total ionizing dose (TID) tolerance >100 krad(Si) without parameter shift |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without degradation-no external protection required in clean-room assembly |
Applications
| Aerospace Power Conditioning | Radiation-Hardened Instrumentation |
|---|---|
Use Scenario: Regulating auxiliary 120 V bus in satellite power distribution units under thermal cycling and vacuum. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for DC-DC converter feedback networks. Use Value: Maintains ±0.6 V regulation over –55 °C to +125 °C ambient due to low ∆VZ (5.20 V) and predictable αVZ. | Use Scenario: Precision voltage reference in nuclear reactor monitoring sensors exposed to gamma radiation. IC Role / Device Role / Timing Role: Primary Zener reference in analog front-end signal chains requiring long-term parametric stability. Use Value: Delivers <10 ppm/°C drift and survives >100 krad(Si) TID without recalibration per MicroNote 050. |
| High-Reliability Test Equipment | Military Avionics Voltage Clamping |
Use Scenario: Calibration reference in portable multimeters and automated test systems deployed in field maintenance depots. IC Role / Device Role / Timing Role: Stable 120 V reference source for DMM range scaling and self-test circuits. Use Value: Enables 0.1% absolute accuracy over 10-year calibration interval due to hermetic seal and low IR drift. | Use Scenario: Overvoltage clamp on 115 VAC-derived DC rails in fighter jet flight control computers. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting FPGA I/O banks during EMI events. Use Value: Responds within 10 ns to 125 V surges while sustaining 91 A surge current (8.3 ms square wave) without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6350US | Same electrical specs and package; differs only in packaging format (bulk vs. tape-and-reel) | No functional difference; 1N6350US/TR optimized for SMT pick-and-place | Select 1N6350US/TR for automated assembly; choose 1N6350US for manual prototyping or low-volume repair |
| SMF120A | Surface-mount SOD-123 package; 120 V, 1.0 kW peak power, but only 1 W average rating and no MIL qualification | Suitable for commercial-grade surge suppression, not for precision regulation or radiation environments | Use SMF120A only in cost-sensitive, non-military applications where hermeticity and TID tolerance are not required |
Compared with 1N6350US/TR, the 1N6350US offers identical performance in bulk form but lacks tape-and-reel logistics support, while SMF120A trades military reliability and low-noise regulation for higher surge capacity and lower cost in commercial settings.
Availability
1N6350US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, radiation-hardened instrumentation, and high-reliability test equipment requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N6350US/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N6350US/TR belongs to the MIL-PRF-19500/533-qualified 1N63xxUS Zener series, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance and test current for 1N6350US/TR?
The 1N6350US/TR has a nominal Zener voltage of 120 V with ±5% tolerance, measured at a test current (IZ2) of 600 mA. This tolerance aligns with standard JEDEC specifications for the 1N63xxUS family and is verified per MIL-PRF-19500/533 screening requirements.
Is 1N6350US/TR RoHS compliant?
No, the 1N6350US/TR is not RoHS compliant. It uses Sn/Pb finish on copper end caps per MIL-PRF-19500/533 requirements. RoHS-compliant versions (e3 suffix) are available only for commercial-grade variants-not for JANTXV-qualified 1N6350US/TR.
What is the maximum surge current rating for 1N6350US/TR?
The 1N6350US/TR supports a non-repetitive peak Zener surge current (IZSM) of 91 A for an 8.3 ms square wave pulse, as specified in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0193-1.
Does 1N6350US/TR require derating above 150 °C end-cap temperature?
Yes, the 1N6350US/TR must be derated linearly above 150 °C end-cap temperature. Per Figure 2 (page 4), power dissipation drops from 0.5 W at 150 °C to zero at 175 °C, with RθJEC = 21 °C/W defining the slope of the derating curve.
How does the temperature coefficient affect 1N6350US/TR in precision applications?
The 1N6350US/TR has a positive temperature coefficient of +0.110 %/°C, meaning its Zener voltage increases ~0.132 V per °C rise. In precision applications, this requires compensation in feedback loops or selection of tighter-tolerance variants (e.g., 1N6350DUS for ±1%) to maintain system-level accuracy.
1N6350US/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):
- 120 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 600 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 91 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
1N6350US/TR FAQ
1.How can I place an order for 1N6350US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6350US/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 1N6350US/TR reliable?
The price and inventory of 1N6350US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6350US/TR is usually 5 days.
3.What payment methods are accepted for 1N6350US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6350US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6350US/TR?
1N6350US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6350US/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 1N6350US/TR?
For technical support, including 1N6350US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6350US/TR requirements.
6.How does Aetrix verify that 1N6350US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6350US/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 1N6350US/TR meets industry standards.
7.What is the process for return or replacement of 1N6350US/TR?
All 1N6350US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6350US/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 1N6350US/TR part is unused and in its original packaging.
Return procedure for 1N6350US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6350US/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
