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Microchip Technology 1N4624-1/TR
- Part No.:
- 1N4624-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4624-1/TR.pdf
- Description:
- DIODE ZENER 4.7V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
1N4624-1/TR from Microsemi is a 500 mW, 4.7 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435, with 5.0 µA max reverse current at 3.0 V, 1550 Ω max dynamic impedance at 250 mA test current, and ±1% voltage tolerance option available. It serves as a precision voltage reference in military-grade power regulation circuits.
For engineers reviewing the 1N4624-1/TR datasheet, 1N4624-1/TR pinout, 1N4624-1/TR application, or 1N4624-1/TR equivalent, this page delivers verified electrical parameters, mil-spec qualification status, thermal derating behavior, noise density (1 µV/√Hz), and RoHS-compliant commercial availability - all critical for high-reliability analog design and obsolescence-sensitive programs.
Technical Context
This device operates in reverse breakdown to maintain stable 4.7 V output across wide current (250 mA IZT) and temperature (-65°C to +175°C) ranges. Its metallurgically bonded construction ensures low leakage (≤3.0 µA at VR = 3.0 V) and minimal capacitance, supporting low-noise analog references.
It exhibits a temperature coefficient of -0.050 %/°C, enabling predictable drift compensation in regulated supplies. The DO-35 package provides hermetic sealing and meets MIL-STD-750 solderability requirements, making it suitable for aerospace and defense systems requiring long-term stability under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.7 V at 250 mA test current - defines nominal regulation point for precision biasing |
| Power Dissipation | 500 mW at 25°C, linearly derated to zero at 175°C - sets maximum continuous thermal load on PCB |
| Dynamic Impedance ZZT | 1550 Ω max at 250 mA - determines output voltage variation under load transients |
| Reverse Current IR | 3.0 µA max at 3.0 V - ensures low standby power loss in reference circuits |
| Noise Density ND | 1 µV/√Hz - enables use in low-noise analog signal chains and precision ADC references |
| Temp Coefficient αVZ | -0.050 %/°C - allows accurate drift modeling over operating temperature range |
| Junction Temp Range | -65°C to +175°C - supports operation in extreme environmental conditions |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; operated with banded end positive for Zener regulation. Tin-lead or RoHS-compliant matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return path in shunt regulator topology |
| Cathode | Zener output node | Provides regulated 4.7 V output; must be biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables stable long-term Zener voltage with <0.1% drift over 10,000 hours at rated stress |
| JANTXV qualification | Validated reliability for mission-critical applications including avionics and satellite power systems |
| Low noise density | 1 µV/√Hz at 4.7 V supports high-resolution data acquisition without added filtering |
| Hermetic glass seal | Prevents moisture ingress and parameter shift in humid or corrosive environments |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection |
Applications
| Avionics Power Reference | Military Radio Bias Supply |
|---|---|
Use Scenario: Providing stable 4.7 V reference for RF front-end LNA biasing in airborne communication transceivers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias voltage for GaAs FET amplifiers. Use Value: Maintains amplifier gain stability across -55°C to +125°C flight envelope with <±20 mV deviation. | Use Scenario: Generating precise bias for crystal oscillator circuitry in handheld tactical radios. IC Role / Device Role / Timing Role: Low-noise Zener reference for VCXO control voltage generation. Use Value: Enables <1 ppm frequency stability over temperature due to 1 µV/√Hz noise floor and -0.050 %/°C TC. |
| Satellite Payload Regulator | Nuclear Instrumentation Reference |
Use Scenario: Voltage reference for radiation-hardened ADCs monitoring solar array telemetry in LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant shunt regulator supplying reference to 16-bit SAR ADC. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy in 10 krad(Si) environments. | Use Scenario: Stable reference for high-voltage detector calibration in nuclear reactor monitoring systems. IC Role / Device Role / Timing Role: Precision Zener element in feedback loop of high-voltage DC-DC converter. Use Value: 5.0 µA max IR at 3.0 V ensures <10 nW standby dissipation in fail-safe shutdown mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4624US-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 axial | Requires SMT reflow process; unsuitable for through-hole prototyping or high-vibration mechanical mounting | Select when board space is constrained and automated assembly is used |
| 1N4624-1e3 | Identical DO-35 package and electrical performance; RoHS-compliant matte-tin plating vs. tin-lead | Required for EU/ROHS-regulated deployments; may require requalification for legacy tin-lead solder processes | Select for new designs targeting global compliance without lead exemption |
Compared with 1N4624-1/TR, the 1N4624US-1 offers identical regulation but demands SMT layout changes, while the 1N4624-1e3 maintains full mechanical compatibility with RoHS-compliant finish - enabling drop-in replacement only when solder chemistry and qualification allow.
Availability
1N4624-1/TR is available at Aetrix Electronics and suitable for avionics power reference, military radio bias supply, and satellite payload regulator applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4624-1/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 mil-spec analog and mixed-signal components.
The 1N4624-1/TR belongs to Microsemi's legacy 1N46xx-1 Zener series designed specifically for defense, aerospace, and nuclear instrumentation applications where long-term parametric stability and extreme environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4624-1/TR?
The standard 1N4624-1/TR has a nominal Zener voltage of 4.7 V with ±5% tolerance per JEDEC registration. Tighter tolerances (±2% and ±1%) are available under different suffixes (e.g., 1N4624C-1/TR), but the base 1N4624-1/TR variant is specified at ±5%. This tolerance applies at 25°C with the device in thermal equilibrium and tested at 250 mA Zener current.
Is 1N4624-1/TR qualified to JANS level?
No, the 1N4624-1/TR is qualified to JANTXV level per MIL-PRF-19500/435. JANS qualification requires additional screening and testing beyond JANTXV and is available only on special-order variants (e.g., 1N4624-1JANS). The TR-suffixed commercial version retains JANTXV qualification but not JANS-level screening.
What is the maximum reverse current specification for 1N4624-1/TR?
The 1N4624-1/TR has a maximum reverse current (IR) of 3.0 µA at VR = 3.0 V, measured at 25°C. This low leakage supports ultra-low-power reference designs and ensures minimal error contribution in high-impedance feedback networks used with op-amps or ADC references.
Can 1N4624-1/TR be used in surface-mount designs?
No - the 1N4624-1/TR uses the axial-leaded DO-35 (DO-204AH) package and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the 1N4624US-1 in DO-213AA package. Substituting 1N4624-1/TR into an SMT footprint would require mechanical adaptation and is not recommended.
Does 1N4624-1/TR meet RoHS requirements?
Yes, the 1N4624-1/TR is available in RoHS-compliant form as 1N4624-1e3/TR, featuring annealed matte-tin plating. The base 1N4624-1/TR uses traditional tin-lead plating; RoHS compliance requires explicit ordering of the "e3" suffix variant, which is documented in Microsemi's T4-LDS-0245-2 datasheet revision.
1N4624-1/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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1550 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4624-1/TR FAQ
1.How can I place an order for 1N4624-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4624-1/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 1N4624-1/TR reliable?
The price and inventory of 1N4624-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4624-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4624-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4624-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4624-1/TR?
1N4624-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4624-1/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 1N4624-1/TR?
For technical support, including 1N4624-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4624-1/TR requirements.
6.How does Aetrix verify that 1N4624-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4624-1/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 1N4624-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4624-1/TR?
All 1N4624-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4624-1/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 1N4624-1/TR part is unused and in its original packaging.
Return procedure for 1N4624-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4624-1/TR Tags
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Diodes Incorporated
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