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Microchip Technology JANTXV1N4989US/TR
- Part No.:
- JANTXV1N4989US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4989US/TR.pdf
- Description:
- DIODE ZENER 200V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,446
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Product details
Overview
JANTXV1N4989US/TR from Microsemi is a military-grade, voidless hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 200 V ±5%, dynamic impedance of 500 Ω at 5 mA test current, and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4989US/TR datasheet, JANTXV1N4989US/TR pinout, JANTXV1N4989US/TR application, or JANTXV1N4989US/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, hermetic glass package with tungsten slugs, 2 μA max reverse leakage at 152 V, and radiation-hardened construction per MicroNote 050.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators qualified to MIL-PRF-19500/356 Class JANTXV. It employs triple-layer passivation and Category I internal metallurgical bonds for enhanced reliability under thermal cycling and mechanical stress.
Its electrical behavior is defined by a sharp breakdown knee (IZK = 5 mA), low temperature coefficient of +0.110 %/°C at 5 mA, and surge capability of 18 A (8.3 ms square wave), making it suitable for transient suppression in regulated DC bus monitoring where long-term parametric stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 200 V ±5% at IZT = 5 mA - defines stable regulation point for high-voltage reference or clamping |
| Power Dissipation | 5 W @ TEC = 140 °C - requires heatsinking or board thermal design for sustained operation above 100 °C ambient |
| Dynamic Impedance ZZ | 500 Ω @ IZT = 5 mA - limits regulation error under load current variation in feedback loops |
| Reverse Leakage IR | 2 μA max @ VR = 152 V - ensures minimal standby power loss in high-impedance sensing paths |
| Temp Coefficient αVZ | +0.110 %/°C @ IZT = 5 mA - enables predictable drift compensation in wide-temperature-range systems |
| Surge Current IZSM | 18 A @ 8.3 ms - withstands lightning-induced transients without degradation in avionics power rails |
| Forward Voltage VF | 1.50 V @ 1.0 A - supports use as polarity-sensitive protection element in bidirectional clamp configurations |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs, "E" package (also known as "D-5B"), cathode indicated by band, copper end caps with Sn/Pb finish, weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node during clamping; must handle 1.0 A forward surge |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal | Banded end; connected to higher-potential rail for voltage regulation or overvoltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk in 100% RH, -65°C to +175°C operational environments |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration profiles exceeding MIL-STD-810G Method 516.6 |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Radiation hardness | Qualified to 100 krad(Si) TID per Microsemi MicroNote 050 - suitable for low-earth orbit satellite power supervisors |
| Tape & Reel packaging | EIA-481-B compliant - enables automated SMT placement without manual handling or contamination risk |
Applications
| Aerospace Power Bus Monitoring | High-Voltage Test Equipment Reference |
|---|---|
Use Scenario: Real-time monitoring of 200 V DC distribution bus in satellite payload power system. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and overvoltage fault detection circuit. Use Value: Maintains ±0.5% regulation accuracy across –55°C to +125°C ambient with <2 μA leakage, enabling reliable fault flagging without false triggers. |
Use Scenario: Precision voltage reference in portable high-voltage insulation resistance tester (up to 250 V). IC Role / Device Role / Timing Role: Stable 200 V reference source for DUT biasing and measurement calibration. Use Value: 500 Ω dynamic impedance minimizes loading error on high-impedance divider networks, preserving measurement linearity to 0.1%. |
| Military Radar Transmitter Bias Clamping | Avionics Flight Control Power Conditioning |
Use Scenario: Clamp protection for gate drive circuitry in GaN-based RF amplifier modules exposed to 200 V supply transients. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting gate-source voltage excursion during switching events. Use Value: 18 A surge rating absorbs 8.3 ms transients without degradation, ensuring uninterrupted radar pulse integrity. |
Use Scenario: Voltage stabilization for analog sensor interface ICs in fly-by-wire actuator control units. IC Role / Device Role / Timing Role: Primary Zener reference for isolated DC-DC converter feedback loop. Use Value: Radiation hardness and –65°C to +175°C operation guarantee functional safety compliance (DO-160 Section 22) across all flight envelopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4988US/TR | 180 V nominal Zener voltage, +0.110 %/°C tempco, same package and rating | Used where 180 V clamping threshold is required instead of 200 V | Select when system overvoltage trip point is set at 180 V rather than 200 V |
| JANTXV1N4990US/TR | 220 V nominal Zener voltage, +0.115 %/°C tempco, identical construction and surge rating | Applied in 220 V-rated power subsystems requiring tighter tolerance margin | Choose for 220 V reference designs needing same reliability and thermal performance |
Compared with JANTXV1N4989US/TR, JANTXV1N4988US/TR and JANTXV1N4990US/TR provide adjacent voltage points within the same MIL-qualified family-enabling consistent qualification reuse across platforms while maintaining identical thermal, mechanical, and radiation performance.
Availability
JANTXV1N4989US/TR is available at Aetrix Electronics and suitable for aerospace power bus monitoring, high-voltage test equipment reference, and avionics flight control power conditioning requiring stable component supply under extended temperature and radiation exposure conditions.
Supply support for JANTXV1N4989US/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.
The JANTXV1N4989US/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener regulator family, designed specifically for mission-critical voltage reference and transient protection in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance for JANTXV1N4989US/TR?
JANTXV1N4989US/TR has a nominal Zener voltage of 200 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. No suffix indicates this standard tolerance; tighter tolerances (e.g., ±2% or ±1%) require C or D suffixes not present in this part number. The device is tested and certified to meet this specification under MIL-PRF-19500/356 requirements.
Is JANTXV1N4989US/TR suitable for space applications?
Yes, JANTXV1N4989US/TR is inherently radiation-hardened to 100 krad(Si) total ionizing dose per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/356 Class JANTXV. Its voidless hermetic glass package and Category I metallurgical bonds make it suitable for low-earth orbit satellite power supervision and fault detection circuits where single-event effects and long-term parametric stability are critical.
What is the maximum continuous Zener current for JANTXV1N4989US/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4989US/TR is 930 mA at 140 °C end-cap temperature, derived from its 5 W power rating and 200 V nominal voltage. This value assumes proper thermal management; derating is required linearly above 140 °C to zero at 175 °C per the datasheet's thermal specifications.
Does JANTXV1N4989US/TR have a cathode band marking?
Yes, JANTXV1N4989US/TR uses a visible cathode band to indicate polarity, consistent with JEDEC-standard marking for glass Zener diodes. The band identifies the cathode terminal, which must be connected to the higher-potential node in Zener regulation or clamping configurations. No alphanumeric marking is applied per the datasheet.
What is the thermal resistance junction-to-end-cap for JANTXV1N4989US/TR?
JANTXV1N4989US/TR has a thermal resistance of 7 °C/W junction-to-end-cap, as confirmed in the SD44A datasheet under Maximum Ratings. This value applies to the entire 1N4954US–1N4996US series and is critical for calculating junction temperature rise under load, especially in conduction-cooled PCB layouts where end-cap solder pads serve as primary heat paths.
JANTXV1N4989US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 152 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTXV1N4989US/TR FAQ
1.How can I place an order for JANTXV1N4989US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4989US/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 JANTXV1N4989US/TR reliable?
The price and inventory of JANTXV1N4989US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4989US/TR is usually 5 days.
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Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
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6.How does Aetrix verify that JANTXV1N4989US/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4989US/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 JANTXV1N4989US/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4989US/TR?
All JANTXV1N4989US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4989US/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 JANTXV1N4989US/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4989US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4989US/TR Tags
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