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Microchip Technology 1N4627-1/TR
- Part No.:
- 1N4627-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4627-1/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
1N4627-1/TR from Microsemi is a 500 mW, 6.2 V metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANS level per MIL-PRF-19500/435, with ±1% Zener voltage tolerance, 5 mA maximum reverse current at 5.0 V, and +0.050%/°C temperature coefficient - used for precision voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4627-1/TR datasheet, 1N4627-1/TR pinout, 1N4627-1/TR application, or 1N4627-1/TR equivalent, this page delivers verified electrical specs, military-grade reliability context, thermal derating behavior, noise density performance, and direct alternatives for high-reliability analog reference design.
Technical Context
This Zener diode operates in reverse breakdown with a nominal 6.2 V regulation at 250 mA test current (IZT), exhibiting low dynamic impedance (1200 Ω at IZT) and minimal capacitance (typical <2 pF). Its metallurgical bond ensures stable junction characteristics under thermal cycling and radiation exposure.
The device supports operation from –65 °C to +175 °C, with thermal resistance junction-to-lead of 250 °C/W at 10 mm lead length, and linear power derating from 500 mW at 25 °C to zero at 175 °C - critical for sustained regulation in sealed avionics enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.2 V ±1% at 250 mA - enables tight reference accuracy in feedback loops without external trimming. |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - defines usable ambient range in conduction-cooled systems. |
| Dynamic Impedance ZZT | 1200 Ω at 250 mA - determines output voltage variation under load current transients. |
| Reverse Current IR | 5.0 µA max at 5.0 V - ensures low quiescent leakage in battery-backed reference circuits. |
| Noise Density | 5 µV/√Hz at 250 mA - specifies broadband RMS noise contribution in low-noise analog references. |
| Temp Coefficient αVZ | –0.010 to +0.050 %/°C - allows predictable drift compensation in wide-temperature-range instrumentation. |
| Junction Temp Range | –65 °C to +175 °C - supports deployment in space-grade and engine-mounted electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode indicated by band; banded end is positive during Zener regulation; weight ≈ 0.2 g; lead finish: annealed matte-tin (RoHS-compliant e3 version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current sink terminal in reverse bias | Connected to circuit ground or lower-potential node to enable Zener conduction. |
| Cathode (banded end) | Regulated voltage output node | Delivers stable 6.2 V when reverse-biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | Validated for JAN, JANTX, JANTXV, and JANS reliability levels - required for flight-critical power monitoring. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock - ensures long-term stability in cyclic environments. |
| Low noise density | 5 µV/√Hz at 250 mA - preserves signal integrity in precision ADC reference buffers and sensor excitation circuits. |
| Hermetic glass sealing | Prevents moisture ingress and parametric shift over 20+ year service life - essential for satellite power subsystems. |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling in cleanroom assembly without special grounding protocols. |
Applications
| Aerospace Power Monitoring | High-Temp Industrial Sensors |
|---|---|
Use Scenario: Regulating reference voltage for ADCs measuring turbine exhaust gas temperature in jet engines. IC Role / Device Role / Timing Role: Zener diode providing stable 6.2 V reference to 16-bit SAR ADC front-end. Use Value: Maintains ±0.05% reference accuracy across –55 °C to +150 °C due to low tempco and hermetic seal. | Use Scenario: Biasing thermistor networks in oil-well downhole telemetry modules operating at 175 °C. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known current through RTD bridge. Use Value: Sustains regulation without parameter drift up to 175 °C junction temperature, validated per JANS screening. |
| Radiation-Hardened Instrumentation | Military Radio Frequency Reference |
Use Scenario: Generating stable bias for op-amps in satellite attitude control sensor signal chains exposed to total ionizing dose >100 krad(Si). IC Role / Device Role / Timing Role: Low-noise Zener reference source for analog front-end gain stages. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy in LEO missions. | Use Scenario: Providing regulated voltage to VCO tuning diodes in secure HF transceiver PLLs. IC Role / Device Role / Timing Role: Low-capacitance (≈1.8 pF) shunt regulator minimizing phase noise injection into oscillator core. Use Value: Minimal junction capacitance prevents frequency pulling and maintains <100 Hz RMS jitter in 2–30 MHz bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4627UR-1 | Same electrical specs, DO-213AA surface-mount package instead of DO-35 axial leads. | Required for automated SMT assembly; lacks axial mounting flexibility for prototyping or repair. | Select when board space is constrained and reflow compatibility is mandatory. |
| 1N4627-1e3 | Identical DO-35 package and electrical parameters; RoHS-compliant matte-tin plating vs. legacy tin-lead. | Required for commercial export compliance; identical reliability screening but different finish chemistry. | Select for new designs targeting RoHS compliance without altering layout or thermal design. |
Compared with 1N4627-1/TR, the 1N4627UR-1 enables SMT production but sacrifices manual repairability, while the 1N4627-1e3 retains full mechanical and electrical equivalence with updated plating - both preserve the same 6.2 V regulation, 1200 Ω impedance, and JANS-qualified reliability baseline.
Availability
1N4627-1/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, high-temp industrial sensors, radiation-hardened instrumentation, and military radio frequency reference applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4627-1/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, radiation-hardened, and defense-grade analog and mixed-signal components.
The 1N4627-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered specifically for precision voltage regulation in mission-critical aerospace, defense, and nuclear instrumentation systems.
FAQ
What is the Zener voltage tolerance for 1N4627-1/TR?
The 1N4627-1/TR has a nominal Zener voltage of 6.2 V with ±1% tolerance, as indicated by the "D" suffix in the nomenclature per Microsemi's part numbering system. This tolerance is guaranteed under standard test conditions at 25 °C with 250 mA Zener test current (IZT), and applies across the full military temperature range when derated per the published power curve.
Is 1N4627-1/TR qualified to JANS level?
Yes, the 1N4627-1/TR is qualified to JANS level per MIL-PRF-19500/435, confirmed in the T4-LDS-0245-2 datasheet. JANS qualification includes rigorous screening for burn-in, temperature cycling, hermeticity, and radiation hardness - making it suitable for spaceflight and strategic defense systems where failure is not an option.
What is the maximum reverse current specification for 1N4627-1/TR?
The maximum reverse current (IR) for 1N4627-1/TR is 5.0 µA at VR = 5.0 V, as specified in the Electrical Characteristics table on page 3 of the datasheet. This low leakage ensures minimal error contribution in high-impedance reference circuits and extends battery life in always-on monitoring systems.
Does 1N4627-1/TR have RoHS compliance?
The "TR" suffix in 1N4627-1/TR indicates tape-and-reel packaging; RoHS compliance is denoted separately by the "e3" suffix (e.g., 1N4627-1e3/TR). The base 1N4627-1/TR is non-RoHS compliant unless explicitly ordered with the e3 designation, as RoHS versions are only available for commercial-grade units per the datasheet footnote.
What is the thermal resistance junction-to-lead for 1N4627-1/TR?
The thermal resistance junction-to-lead (RθJL) for 1N4627-1/TR is 250 °C/W when measured at 10 mm lead length from the body, per the Maximum Ratings table. This value is critical for calculating junction temperature rise in chassis-mounted or heatsink-attached configurations where lead conduction dominates cooling.
1N4627-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4627-1/TR FAQ
1.How can I place an order for 1N4627-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4627-1/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 1N4627-1/TR reliable?
The price and inventory of 1N4627-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4627-1/TR is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4627-1/TR transactions.
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1N4627-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4627-1/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 1N4627-1/TR?
For technical support, including 1N4627-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4627-1/TR requirements.
6.How does Aetrix verify that 1N4627-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4627-1/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 1N4627-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4627-1/TR?
All 1N4627-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4627-1/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 1N4627-1/TR part is unused and in its original packaging.
Return procedure for 1N4627-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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