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Microchip Technology 1N753A
- Part No.:
- 1N753A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N753A.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,981
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Product details
Overview
1N753A from Microsemi is a 500 mW, 6.2 V ±5% axial-leaded silicon Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTXV level per MIL-PRF-19500/127, with dynamic impedance of 3 Ω at 20 mA and temperature coefficient of +0.045 %/°C - used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N753A datasheet, 1N753A pinout, 1N753A application, or 1N753A equivalent, key selection criteria include Zener voltage tolerance, junction-to-lead thermal resistance (250 °C/W), reverse leakage current (5 µA at 3.5 V), maximum Zener current (50 mA), and RoHS compliance availability on commercial-grade variants.
Technical Context
The 1N753A operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable 6.2 V across its terminals under regulated current conditions. Its metallurgically bonded junction ensures low noise, minimal capacitance, and radiation hardness per MicroNote 050.
It is specified for operation from –65 °C to +175 °C, with linear power derating from 500 mW at 50 °C lead temperature to zero at 175 °C. The cathode band denotes polarity, requiring the banded end to be biased positive for Zener regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.2 V ±5% at IZT = 20 mA - defines nominal regulation point with tight production control |
| Dynamic Impedance ZZT | 3 Ω at IZT = 20 mA - determines output voltage stability under load transients |
| Max Reverse Current IR | 5 µA at VR = 3.5 V - sets minimum bias current threshold before regulation onset |
| Max Zener Current IZM | 50 mA - maximum continuous DC current before thermal runaway risk at rated power |
| Temp Coefficient αVZ | +0.045 %/°C - quantifies voltage drift over temperature; enables predictable compensation in wide-temp designs |
| Power Dissipation PM(AV) | 0.5 W @ TL = 50 °C - usable power limit with 0.375″ lead length; derates linearly to zero at 175 °C |
| Junction-to-Lead RθJL | 250 °C/W - critical for thermal design when mounted with controlled lead length; enables accurate junction temp estimation |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by a single color band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Reference ground node in shunt regulator configuration; connects to system common |
| Cathode | Banded end | Regulated output node; held at 6.2 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualification | JANTXV-level reliability and screening for aerospace/military systems requiring extended lifetime and failure mode control |
| Metallurgical bond construction | Eliminates wire bonds, reducing failure mechanisms and enabling inherent radiation hardness per MicroNote 050 |
| Low dynamic impedance | 3 Ω at 20 mA ensures <18.6 mV output variation for ±6 mA load step - suitable for analog references |
| ESD insensitivity | Non-sensitive to ESD per MIL-STD-750 method 1020 - simplifies handling and eliminates need for ESD protection circuitry |
| Minimal capacitance | Typical junction capacitance <2 pF - preserves high-frequency signal integrity in RF bias and timing applications |
Applications
| Military Power Supply Regulation | Analog Voltage Reference |
|---|---|
Use Scenario: Stable 6.2 V reference in airborne radar power conditioning modules operating from –55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise bias for op-amp comparators and ADC reference buffers. Use Value: JANTXV qualification and +0.045 %/°C TC ensure regulation stability across extreme thermal cycling without recalibration. | Use Scenario: Precision 6.2 V reference in test equipment front-end signal chains where long-term drift must be <0.1% over 10 years. IC Role / Device Role / Timing Role: Two-terminal passive reference element replacing active IC references where ultra-low noise and zero quiescent current are required. Use Value: Metallurgical bond and hermetic DO-35 package deliver <10 ppm/√kHz noise floor and negligible aging drift. |
| Industrial Sensor Excitation | Overvoltage Clamp Protection |
Use Scenario: Constant-current excitation source for strain gauge bridges in oilfield downhole instrumentation exposed to 175 °C junction temperatures. IC Role / Device Role / Timing Role: Zener-regulated current source node maintaining fixed voltage headroom for series-pass transistor biasing. Use Value: 250 °C/W RθJL and 175 °C max TJ rating allow direct integration into high-temp PCB layouts without heatsinking. | Use Scenario: Transient suppression at microcontroller I/O pins in railway signaling interfaces subject to ISO 7637-2 pulse 1 and pulse 2 surges. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting voltage to 6.2 V during fast-rising transients. Use Value: Sub-2 pF capacitance avoids signal integrity degradation on 10 MHz digital lines while clamping within 10 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | Same 6.2 V nominal, but ±5% tolerance only; no MIL-spec qualification; TO-204AA (DO-41) package; RθJA = 500 °C/W | Commercial industrial use only; unsuitable for aerospace or high-reliability environments | Select when cost sensitivity outweighs reliability requirements and board space allows larger DO-41 footprint |
| BZX55C6V2 | 6.2 V ±5%, DO-35 package, but only commercial grade; no JANTXV screening; higher ZZT = 10 Ω; max IZM = 41 mA | Limited to consumer electronics and non-critical instrumentation due to unqualified process and lower surge margin | Choose for RoHS-compliant volume production where MIL-STD testing and radiation hardness are unnecessary |
Compared with 1N4735A and BZX55C6V2, the 1N753A delivers superior thermal performance (250 °C/W vs ≥500 °C/W), guaranteed military screening, and lower dynamic impedance - making it the only option for JANTXV-requiring systems where regulation accuracy and survivability under thermal stress are mandatory.
Availability
1N753A is available at Aetrix Electronics and suitable for military avionics power supplies, high-reliability analog instrumentation, and downhole industrial sensor systems requiring stable component supply across extended product lifecycles.
Supply support for 1N753A 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 defense-grade analog and mixed-signal components.
The 1N753A belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical military, aerospace, and energy exploration systems where long-term parametric stability and environmental survivability are non-negotiable.
FAQ
What is the Zener voltage tolerance and test condition for the 1N753A?
The 1N753A has a nominal Zener voltage of 6.2 V with a ±5% tolerance, measured at IZT = 20 mA and 25 °C ambient. Voltage readings are taken 20 seconds after applying the DC test current to allow thermal stabilization. This tolerance applies to all JAN, JANTX, and JANTXV versions unless otherwise specified by suffix.
Is the 1N753A RoHS compliant?
The 1N753A is available in RoHS-compliant versions only for commercial-grade units (marked with "e3" suffix). JANTXV-qualified 1N753A units use traditional tin-lead plating and are not RoHS compliant. Always verify the full part number suffix - e.g., 1N753A-1e3 - to confirm RoHS status before procurement.
What is the maximum allowable Zener current for continuous operation of the 1N753A?
The maximum continuous Zener current (IZM) for the 1N753A is 50 mA at 25 °C ambient, derived from its 500 mW power rating and 6.2 V nominal voltage. At elevated temperatures, this value decreases per the linear derating curve - dropping to ~33 mA at 100 °C lead temperature - to prevent junction overheating beyond 175 °C.
How does the temperature coefficient of the 1N753A affect its regulation accuracy over temperature?
The 1N753A has a positive temperature coefficient of +0.045 %/°C, meaning its Zener voltage increases by approximately 2.79 mV per °C rise. Over a –65 °C to +175 °C range, this results in a total shift of ~1.07 V - a known, monotonic drift that can be compensated in system-level calibration. It is stable and repeatable, not random drift.
Can the 1N753A be used in surface-mount applications?
No - the standard 1N753A is axial-leaded in DO-35 glass package and is not designed for SMT assembly. However, Microsemi offers the MELF-packaged 1N753AUR-1 variant (DO-213AA) for surface-mount use. That version shares identical electrical specs but requires reflow profile validation per MIL-STD-750 method 2026.
1N753A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3.5 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-204AH (DO-35)
1N753A FAQ
1.How can I place an order for 1N753A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N753A 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 1N753A reliable?
The price and inventory of 1N753A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N753A is usually 5 days.
3.What payment methods are accepted for 1N753A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N753A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N753A?
1N753A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N753A 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 1N753A?
For technical support, including 1N753A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N753A requirements.
6.How does Aetrix verify that 1N753A is sourced from the original manufacturer or authorized distributors?
All 1N753A 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 1N753A meets industry standards.
7.What is the process for return or replacement of 1N753A?
All 1N753A units undergo pre-shipment inspection (PSI). If there is an issue with 1N753A, 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 1N753A part is unused and in its original packaging.
Return procedure for 1N753A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N753A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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