My Inquiry
My Account
Microchip Technology JANTX1N4970DUS/TR
- Part No.:
- JANTX1N4970DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4970DUS/TR.pdf
- Description:
- DIODE ZENER 33V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANTX1N4970DUS/TR from Microsemi is a military-qualified, voidless hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 33 V, ±1% tolerance (D suffix), and 539 mg mass. It operates from −65 °C to +175 °C, delivers 5 W power dissipation at TEC = 125 °C, and features 10 °C/W thermal resistance junction-to-end-cap. Used in high-reliability voltage regulation for aerospace power conditioning.
For engineers reviewing the JANTX1N4970DUS/TR datasheet, JANTX1N4970DUS/TR pinout, JANTX1N4970DUS/TR application, or JANTX1N4970DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, hermetic glass package, 33 V ±1% regulation, 5 W surface-mount power handling, and −65 °C to +175 °C operating range.
Technical Context
This device belongs to the 1N4954US–1N4996US family of military-grade Zener regulators, fabricated using voidless hard-glass hermetic construction with internal Category I metallurgical bonds. Its electrical behavior is defined by tight regulation over wide current (10%–50% IZM) and temperature ranges, with dynamic impedance of 10 Ω at IZT = 40 mA.
The JANTX1N4970DUS/TR exhibits low temperature coefficient (±0.095 %/°C), low reverse leakage (2 μA at 2.8 V), and robust surge capability (5 A @ 8.3 ms). Its cathode band polarity and Sn/Pb-finished copper end caps support reliable reflow soldering in high-integrity PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±1% at 40 mA - ensures precise reference stability in critical analog and power monitoring circuits. |
| Power Dissipation | 5 W @ TEC = 125 °C - enables high-current regulation without derating in compact surface-mount layouts. |
| Dynamic Impedance (ZZ) | 10 Ω at IZT = 40 mA - minimizes output voltage variation under load transients. |
| Reverse Leakage (IR) | 2 μA max at 2.8 V - guarantees low standby power loss in battery-backed or low-power hold-up systems. |
| Operating Temperature | −65 °C to +175 °C - supports deployment in extreme-environment avionics, downhole tools, and space-grade electronics. |
| Thermal Resistance | 10 °C/W junction-to-end-cap - allows direct thermal coupling to heatsink pads or chassis for sustained 5 W operation. |
| Surge Current | 5 A peak @ 8.3 ms - withstands lightning-induced transients and inductive switching spikes without degradation. |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; enables forward biasing up to 1.5 V @ 1 A during non-regulation states. |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node to maintain reverse-biased regulation at 33 V. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring long-term parametric stability in vacuum or humid environments. |
| MIL-PRF-19500/356 JANTX qualification | Validated reliability for Class S (space) and Class H (high-reliability) applications with full lot traceability and screening. |
| Triple-layer passivation | Prevents surface conduction paths and enhances resistance to contamination-induced leakage in harsh chemical atmospheres. |
| Category I metallurgical bond | Guarantees mechanical integrity of internal die attach under thermal cycling and mechanical shock per MIL-STD-883. |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift-no external protection required. |
Applications
| Aerospace Power Bus Regulation | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Stabilizing 33 V reference in satellite power distribution units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Zener voltage regulator providing primary DC reference for ADCs, comparators, and LDO feedback networks. Use Value: Maintains ±1% regulation across −65 °C to +175 °C and survives 100 krad(Si) total ionizing dose per MicroNote 050. |
Use Scenario: Precision voltage clamping in high-temperature logging tools deployed at >150 °C wellbore depths. IC Role / Device Role / Timing Role: Overvoltage protector and stable bias source for sensor front-end amplifiers and telemetry drivers. Use Value: Zero parametric drift after 1000-hour life test at 175 °C due to hermetic voidless-glass construction. |
| Military Radar Bias Supply | Satellite Payload Voltage Clamp |
Use Scenario: Regulating gate bias for GaN RF power amplifiers in airborne radar transceivers subject to vibration and EMI. IC Role / Device Role / Timing Role: Low-noise, low-impedance Zener shunt regulating element in multi-stage bias network. Use Value: 10 Ω dynamic impedance suppresses ripple-induced phase noise; ESD immunity prevents field failure during maintenance. |
Use Scenario: Clamping transient surges on 33 V payload bus during solar array deployment and battery switching events. IC Role / Device Role / Timing Role: Primary surge suppression device absorbing 5 A, 8.3 ms pulses without degradation. Use Value: Survives >1000 surge events per MIL-STD-704F Appendix B without Zener voltage shift beyond ±0.5%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4970DUS/TR | Higher screening level (JANTXV vs. JANTX); tighter ΔVZ spec (±0.5% vs. ±1%) and extended burn-in. | Required for Class S spaceflight missions where single-event burnout risk must be minimized. | Select when mission-critical radiation hardness and zero-defect screening outweigh cost premium. |
| 1N4970US (commercial grade) | No MIL-PRF-19500 qualification; wider temp range (−65 °C to +150 °C); same 33 V ±1%, 5 W, D-5B package. | Suitable for industrial control or test equipment where military screening is unnecessary. | Choose for cost-sensitive, non-mission-critical designs with relaxed reliability requirements. |
Compared with JANTX1N4970DUS/TR, JANTXV1N4970DUS/TR adds radiation-hardened screening and tighter voltage tolerance for space use, while 1N4970US removes military qualification to reduce cost and simplify procurement-both retain identical electrical performance and footprint.
Availability
JANTX1N4970DUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, downhole instrumentation, military radar biasing, and satellite payload clamping requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4970DUS/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 JANTX1N4970DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode product line, engineered specifically for voltage regulation in mission-critical systems demanding hermetic reliability and extreme environmental resilience.
FAQ
What is the Zener voltage tolerance of JANTX1N4970DUS/TR?
JANTX1N4970DUS/TR has a nominal Zener voltage of 33 V with ±1% tolerance, confirmed by the "D" suffix per Microsemi SD44A datasheet. This tolerance is measured at IZT = 40 mA and applies across the full −65 °C to +175 °C operating range. The JANTX1N4970DUS/TR maintains this specification after MIL-PRF-19500 screening, including temperature cycling and burn-in.
Is JANTX1N4970DUS/TR compatible with lead-free reflow processes?
JANTX1N4970DUS/TR uses Sn/Pb-finished copper end caps and is not qualified for Pb-free reflow. Its maximum reflow peak temperature is limited to 235 °C per MIL-STD-202 Method 210. For lead-free assembly, Microsemi recommends verifying compatibility with board-level thermal profiling and considering JANTX1N4970DUS/TR's Sn/Pb finish as a process constraint-not a design feature.
Does JANTX1N4970DUS/TR have radiation hardness documentation?
Yes-JANTX1N4970DUS/TR is inherently radiation-hardened as described in Microsemi MicroNote 050. It exhibits no functional degradation up to 100 krad(Si) total ionizing dose and demonstrates single-event latchup immunity per MIL-STD-883 Method 1019. Radiation data applies directly to the JANTX1N4970DUS/TR part number and its voidless-glass construction.
What is the maximum continuous Zener current for JANTX1N4970DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4970DUS/TR is 5.0 A, calculated from its 5 W power rating and 33 V Zener voltage (IZM = PZ/VZ). This value is validated at TEC = 125 °C and derates linearly to zero at +175 °C per the datasheet's thermal curve. The JANTX1N4970DUS/TR sustains this current without parameter shift when mounted on a thermally optimized pad layout.
Can JANTX1N4970DUS/TR replace axial-leaded 1N4970 in existing designs?
No-JANTX1N4970DUS/TR uses the surface-mount D-5B ("E") package, while axial-leaded equivalents (e.g., JANTX1N4970) use DO-41. They share identical electrical specs but differ in mechanical form, thermal path, and mounting method. Substitution requires PCB redesign, thermal validation, and requalification per MIL-PRF-19500. The JANTX1N4970DUS/TR is not a drop-in replacement for through-hole variants.
JANTX1N4970DUS/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):
- 33 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25.1 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
JANTX1N4970DUS/TR FAQ
1.How can I place an order for JANTX1N4970DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4970DUS/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 JANTX1N4970DUS/TR reliable?
The price and inventory of JANTX1N4970DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4970DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4970DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4970DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4970DUS/TR?
JANTX1N4970DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4970DUS/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 JANTX1N4970DUS/TR?
For technical support, including JANTX1N4970DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4970DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4970DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4970DUS/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 JANTX1N4970DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4970DUS/TR?
All JANTX1N4970DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4970DUS/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 JANTX1N4970DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4970DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4970DUS/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
