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Microchip Technology JANS1N4625-1/TR
- Part No.:
- JANS1N4625-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4625-1/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,007
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Product details
Overview
JANS1N4625-1/TR from Microsemi is a 500 mW, 5.1 V Zener voltage regulator diode in DO-35 glass package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers ±1% Zener voltage tolerance at 250 mA test current, exhibits 1500 Ω dynamic impedance, and maintains stable regulation across -65 °C to +175 °C junction temperature range.
For engineers reviewing the JANS1N4625-1/TR datasheet, JANS1N4625-1/TR pinout, JANS1N4625-1/TR application, or JANS1N4625-1/TR equivalent, key selection criteria include its military-grade qualification, low noise density (2 µV/√Hz), metallurgically bonded construction, and axial-leaded DO-35 mechanical robustness for harsh-environment voltage reference and regulation tasks.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond ensures long-term stability under thermal cycling and radiation exposure, supporting compliance with Microsemi MicroNote 050 for inherent radiation hardness.
The JANS1N4625-1/TR is specified at 250 mA Zener test current (IZT), with maximum Zener current (IZM) of 70 mA and temperature coefficient of -0.045/+0.030 %/°C - enabling predictable drift compensation in analog reference circuits across wide operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±1% at 250 mA - provides tight reference accuracy for precision analog power rails and sensor excitation. |
| Power Dissipation | 500 mW at TC = 25 °C - supports continuous regulation in compact, unheatsinked designs with linear derating to zero at 175 °C. |
| Dynamic Impedance (ZZT) | 1500 Ω at 250 mA - defines output impedance in regulation region; critical for ripple rejection in low-noise references. |
| Noise Density (ND) | 2 µV/√Hz at IZT - enables ultra-low-noise voltage references in instrumentation and ADC biasing applications. |
| Reverse Leakage (IR) | 3.0 µA at 3.0 V - ensures minimal parasitic current draw in standby or low-power monitoring circuits. |
| Temp Coefficient (αVZ) | -0.045/+0.030 %/°C - allows accurate drift modeling for temperature-compensated reference designs. |
| Junction Temp Range | -65 °C to +175 °C - certified for operation in extreme environments including space, avionics, and nuclear systems. |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plating; cathode identified by single black band; weight ≈ 0.2 g; lead length 25.4–38.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or lowest potential point; forms return path for Zener current during regulation. |
| Cathode | Regulated Output Terminal | Banded end; supplies stable 5.1 V reference when reverse-biased; must be held positive relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS Qualification | Validated for Class S (space-level) reliability with full lot traceability, burn-in, and radiation testing per Microsemi MicroNote 050. |
| Metallurgical Bond Construction | Eliminates interfacial delamination risk under thermal shock and vibration - essential for launch-critical avionics subsystems. |
| Low Noise Density | 2 µV/√Hz at 5.1 V enables sub-10 µVpp broadband noise in precision reference buffers without external filtering. |
| Hermetic Glass Encapsulation | Prevents moisture ingress and ionic contamination - maintains parameter stability over 20+ year field life in sealed modules. |
| ESD Robustness | Non-sensitive per MIL-STD-750 Method 1020 - survives >4 kV HBM without parameter shift or failure in handling and assembly. |
Applications
| Avionics Power Reference | Satellite Sensor Biasing |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision data acquisition front-ends. Use Value: ±1% tolerance and -65 °C to +175 °C operation ensure consistent ADC full-scale accuracy across all mission phases. | Use Scenario: Biasing photodiode and MEMS accelerometer signal chains in LEO satellite payloads. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference establishing DC operating point for analog front-ends. Use Value: 2 µV/√Hz noise density and inherent radiation hardness maintain SNR integrity in high-radiation orbits. |
| Nuclear Instrumentation | Tactical Radio RF Stage Bias |
Use Scenario: Calibrating gamma spectrometer pulse-height analyzers in reactor monitoring systems. IC Role / Device Role / Timing Role: Precision shunt regulator defining energy scale calibration points in high-stability analog integrators. Use Value: JANS qualification and -0.045/+0.030 %/°C tempco enable <0.01% full-scale drift over 10-year deployment. | Use Scenario: Setting gate voltage for GaAs FET amplifiers in manpack radio transmit stages. IC Role / Device Role / Timing Role: Stable DC bias source maintaining amplifier linearity and gain flatness across temperature extremes. Use Value: DO-35 mechanical ruggedness and 1500 Ω ZZT minimize RF modulation sidebands induced by supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4625US-1 | Same electrical specs but in DO-213AA surface-mount package; no axial leads. | Used where board space is constrained and reflow assembly is required; lacks axial mounting flexibility. | Select 1N4625US-1 only when DO-35 through-hole mounting is incompatible with PCB layout or production process. |
| JANTXV1N4625-1 | Identical DO-35 package and electrical parameters; qualified to JANTXV (not JANS) per MIL-PRF-19500/435. | Approved for high-reliability ground and airborne systems but not spaceflight; lower screening rigor than JANS. | Choose JANTXV1N4625-1 for cost-sensitive defense electronics where full JANS radiation and life-test requirements are not mandated. |
Compared with JANS1N4625-1/TR, the 1N4625US-1 offers identical regulation performance in a surface-mount form factor ideal for automated assembly, while JANTXV1N4625-1 provides near-equivalent reliability at reduced qualification cost - making both viable alternatives depending on mechanical integration and program-level certification needs.
Availability
JANS1N4625-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, and nuclear instrumentation requiring stable component supply with full traceability and extended lifecycle support.
Supply support for JANS1N4625-1/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The JANS1N4625-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered specifically for voltage reference stability, radiation hardness, and thermal resilience in mission-critical electronic systems.
FAQ
What is the Zener voltage tolerance of JANS1N4625-1/TR?
JANS1N4625-1/TR has a nominal Zener voltage of 5.1 V with ±1% tolerance, verified at 250 mA test current and 25 °C ambient. This tight tolerance is achieved via post-trim screening and is maintained across the full -65 °C to +175 °C junction temperature range, making JANS1N4625-1/TR suitable for precision reference applications where drift must remain within 51 mV of nominal.
Is JANS1N4625-1/TR RoHS compliant?
No, JANS1N4625-1/TR is not RoHS compliant. As a JANS-qualified military-grade part, it uses traditional tin-lead plating per MIL-STD-750 and is exempt from RoHS Directive 2011/65/EU under Annex III exemption 7a. RoHS-compliant versions (e.g., 1N4625-1e3) exist only in commercial-grade variants and are not qualified to JANS level.
What is the maximum Zener current rating for JANS1N4625-1/TR?
The maximum Zener current (IZM) for JANS1N4625-1/TR is 70 mA, derived from its 500 mW power rating and 5.1 V nominal Zener voltage (P = V × I). This value assumes thermal equilibrium at 25 °C lead temperature; actual usable current must be derated linearly above 50 °C per the published power derating curve in the T4-LDS-0245-2 datasheet.
How is polarity marked on JANS1N4625-1/TR?
JANS1N4625-1/TR uses a single black band on the glass body to indicate the cathode terminal. The diode must be operated with the banded end held positive relative to the unmarked (anode) end to achieve Zener regulation. Reversing polarity subjects the device to forward conduction only, with ~1.1 V drop at 200 mA - not regulation.
Does JANS1N4625-1/TR require heatsinking in typical applications?
No, JANS1N4625-1/TR does not require external heatsinking in standard applications. With a thermal resistance of 250 °C/W junction-to-lead (RθJL) and 300 °C/W junction-to-ambient (RθJA) on FR4, it safely dissipates 500 mW at 25 °C ambient. However, sustained operation above 50 °C ambient requires derating per Figure 2 in T4-LDS-0245-2, and JANS1N4625-1/TR should be mounted with ≥10 mm lead length from PCB body to maintain rated performance.
JANS1N4625-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4625-1/TR FAQ
1.How can I place an order for JANS1N4625-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4625-1/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 JANS1N4625-1/TR reliable?
The price and inventory of JANS1N4625-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4625-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4625-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4625-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4625-1/TR?
JANS1N4625-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4625-1/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 JANS1N4625-1/TR?
For technical support, including JANS1N4625-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4625-1/TR requirements.
6.How does Aetrix verify that JANS1N4625-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4625-1/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 JANS1N4625-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4625-1/TR?
All JANS1N4625-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4625-1/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 JANS1N4625-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4625-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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