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Microchip Technology JANTXV1N4957CUS/TR
- Part No.:
- JANTXV1N4957CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4957CUS/TR.pdf
- Description:
- DIODE ZENER 9.1V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,898
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Product details
Overview
JANTXV1N4957CUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with a nominal Zener voltage of 9.1 V ±2% (C suffix), dynamic impedance of 2.0 Ω at 150 mA test current, and operating junction temperature range of −65 °C to +175 °C. It serves as a precision voltage reference and regulation element in high-reliability power supply rails, analog sensing circuits, and overvoltage protection stages.
For engineers reviewing the JANTXV1N4957CUS/TR datasheet, JANTXV1N4957CUS/TR pinout, JANTXV1N4957CUS/TR application, or JANTXV1N4957CUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, voidless-glass hermetic construction, −65 °C to +175 °C operational envelope, 2.0 Ω dynamic impedance at IZT, and compatibility with automated SMT assembly per EIA-481-B tape-and-reel packaging.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage across load variations and temperature extremes. Its internal Category I metallurgical bond and triple-layer passivation ensure long-term reliability under thermal cycling, radiation exposure, and high-humidity environments.
The JANTXV1N4957CUS/TR exhibits low dynamic impedance (2.0 Ω) at 150 mA, tight voltage tolerance (±2%), and minimal temperature coefficient (+0.06 %/°C), enabling accurate regulation without external compensation in critical analog and power control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±2% at 150 mA - defines precise regulation point for feedback networks and reference generation |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in compact, conduction-cooled layouts |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT = 150 mA - ensures minimal output voltage deviation under load transients |
| Max Reverse Leakage (IR) | 25 μA at VR = 7.3 V - guarantees low quiescent current in standby and battery-backed systems |
| Temp Coefficient (αVZ) | +0.06 %/°C - enables predictable drift behavior for temperature-compensated designs |
| Surge Current (IZSM) | 22 A @ 8.3 ms - withstands short-duration line surges without degradation |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - supports use as clamping diode in bidirectional protection schemes |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg, and EIA-481-B tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias; reference node in reverse bias | Connected to ground or low-impedance return path during regulation |
| Cathode | Regulated output node in reverse bias | Provides stable 9.1 V reference when biased above VZ; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion over 20+ year field life in aerospace and defense deployments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal stability under shock/vibration up to 100 g and rapid thermal cycling |
| Triple-layer passivation | Blocks surface leakage paths and suppresses parametric drift in high-humidity or contaminated environments |
| MIL-PRF-19500/356 qualification (JANTXV) | Validates performance to screening, testing, and lot traceability requirements for Class V space and military hardware |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions beyond standard static-safe protocols during board assembly |
Applications
| Aerospace Power Conditioning | Defense System Reference Voltage |
|---|---|
Use Scenario: Regulating auxiliary 9.1 V rail in satellite power distribution units exposed to −65 °C to +125 °C thermal cycles. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for DC-DC converter feedback loop. Use Value: Maintains ±0.18 V regulation accuracy over full temperature range due to +0.06 %/°C TC and 2.0 Ω ZZ. |
Use Scenario: Stabilizing sensor excitation voltage in missile guidance inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Precision shunt regulator supplying fixed bias to MEMS gyro amplifiers. Use Value: Delivers <25 μA leakage at 7.3 V, minimizing offset drift in ultra-low-power analog front ends. |
| Industrial Process Control Loop | Radiation-Hardened Instrumentation |
Use Scenario: Calibrating 4–20 mA transmitter output in nuclear plant monitoring systems. IC Role / Device Role / Timing Role: Voltage clamp and reference source in HART communication interface circuitry. Use Value: Survives 10 krad(Si) total ionizing dose without parameter shift, per MicroNote 050. |
Use Scenario: Providing stable bias in downhole logging tools operating at 175 °C wellbore temperatures. IC Role / Device Role / Timing Role: High-temperature shunt regulator for analog signal conditioning ASICs. Use Value: Operates continuously at +175 °C junction temperature with no derating below 5 W rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4957US/TR | Same 9.1 V rating but ±5% tolerance (no C suffix); higher max leakage (25 μA vs. 25 μA same), identical package and thermal specs | Suitable where tighter voltage tolerance is not required; lower cost for non-critical references | Select JANTXV1N4957US/TR only if ±5% regulation error is acceptable in the target feedback loop |
| 1N4957US | Commercial-grade version; lacks MIL-PRF-19500/356 screening, no radiation hardness data, −65 °C to +150 °C rating | Applicable in industrial controls with less stringent reliability or environmental demands | Choose 1N4957US only for non-military, non-space programs where lifecycle assurance and extreme temp operation are not required |
Compared with JANTXV1N4957US/TR and 1N4957US, the JANTXV1N4957CUS/TR delivers superior voltage accuracy (±2% vs. ±5% or unqualified), verified radiation tolerance, and extended high-temperature capability (+175 °C vs. +150 °C), making it the sole option for flight-critical and nuclear-hardened applications.
Availability
JANTXV1N4957CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference voltage generation, and radiation-hardened instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4957CUS/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 aerospace, defense, and industrial markets.
The JANTXV1N4957CUS/TR belongs to Microsemi's military-qualified Zener diode family designed for voltage regulation and reference stability in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTXV1N4957CUS/TR?
The JANTXV1N4957CUS/TR has a nominal Zener voltage of 9.1 V with a tolerance of ±2%, indicated by the "C" suffix in the part number. This tighter tolerance is achieved through post-manufacturing screening and is validated per MIL-PRF-19500/356 requirements. The JANTXV1N4957CUS/TR maintains this specification across its full operating temperature range of −65 °C to +175 °C.
Is JANTXV1N4957CUS/TR suitable for high-temperature applications?
Yes, the JANTXV1N4957CUS/TR is rated for continuous operation at junction temperatures up to +175 °C, with linear derating to zero power at that limit. Its voidless-glass hermetic package and Category I metallurgical bond enable reliable performance in downhole, engine-mounted, and avionics applications where ambient temperatures exceed 125 °C. The JANTXV1N4957CUS/TR does not require external heatsinking at 5 W within this envelope.
Does JANTXV1N4957CUS/TR have radiation hardness certification?
Yes, the JANTXV1N4957CUS/TR is inherently radiation hard, as documented in Microsemi MicroNote 050. It is qualified to MIL-PRF-19500/356 and has demonstrated survivability at total ionizing dose levels exceeding 10 krad(Si) without parametric degradation. This makes the JANTXV1N4957CUS/TR appropriate for satellite, nuclear, and high-altitude platform applications.
What is the maximum surge current rating for JANTXV1N4957CUS/TR?
The JANTXV1N4957CUS/TR supports a nonrepetitive peak Zener surge current (IZSM) of 22 A for an 8.3 ms half-sine waveform, per the electrical characteristics table. This rating allows the JANTXV1N4957CUS/TR to absorb transient overvoltages-such as those from inductive switching or lightning-induced coupling-without permanent damage or parameter shift.
How is polarity identified on JANTXV1N4957CUS/TR?
Polarity on the JANTXV1N4957CUS/TR is indicated by a visible cathode band on the glass body. The banded end is the cathode terminal, which must be connected to the higher-potential node when used in reverse-bias regulation mode. The anode is the unmarked end and connects to ground or the return path. This marking is consistent across all devices in the 1N4954US–1N4996US series.
JANTXV1N4957CUS/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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 6.9 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
JANTXV1N4957CUS/TR FAQ
1.How can I place an order for JANTXV1N4957CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4957CUS/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 JANTXV1N4957CUS/TR reliable?
The price and inventory of JANTXV1N4957CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4957CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4957CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4957CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4957CUS/TR?
JANTXV1N4957CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4957CUS/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 JANTXV1N4957CUS/TR?
For technical support, including JANTXV1N4957CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4957CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4957CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4957CUS/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 JANTXV1N4957CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4957CUS/TR?
All JANTXV1N4957CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4957CUS/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 JANTXV1N4957CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4957CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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