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Microchip Technology 1N758A/TR
- Part No.:
- 1N758A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N758A/TR.pdf
- Description:
- DIODE ZENER 10V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,873
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Product details
Overview
1N758A/TR from Microsemi is a 500 mW, 10.0 V ±5% axial-leaded silicon Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTX level per MIL-PRF-19500/127, with dynamic impedance of 7 Ω at 20 mA and temperature coefficient of +0.076 %/°C - used for precision voltage regulation in military power supply reference circuits.
For engineers reviewing the 1N758A/TR datasheet, 1N758A/TR pinout, 1N758A/TR application, or 1N758A/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, RoHS-compliant commercial availability, MIL-spec qualification status, and direct alternative part comparisons for stable, high-reliability voltage reference design.
Technical Context
The 1N758A/TR operates as a two-terminal voltage reference device, conducting in reverse breakdown at nominal 10.0 V with 7 Ω dynamic impedance at IZT = 20 mA and maximum reverse current of 1 µA at VR = 8.0 V. Its metallurgically bonded junction ensures stable regulation across -65 °C to +175 °C operating range.
It features a cathode band marking for polarity identification, tin-lead or RoHS-compliant matte-tin plating, and is rated for 0.5 W average power dissipation at TL = +50 °C with 250 °C/W junction-to-lead thermal resistance - enabling use in high-temperature, low-footprint analog reference designs without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10.0 V at IZT = 20 mA - defines stable reference point for analog feedback loops and biasing networks. |
| Zener Tolerance | ±5% - supports cost-effective, non-critical regulation where tight tolerance is not required. |
| Dynamic Impedance | 7 Ω at IZT - determines output voltage stability under varying load current; lower value improves regulation accuracy. |
| Max Reverse Current | 1 µA at VR = 8.0 V - ensures minimal leakage in standby or low-power monitoring circuits. |
| Power Dissipation | 0.5 W at TL = +50 °C - sets maximum continuous power handling before thermal derating begins. |
| Temp Coefficient | +0.076 %/°C - quantifies voltage drift over temperature; positive sign indicates rising VZ with heating. |
| Junction Temp Range | -65 °C to +175 °C - enables deployment in aerospace, defense, and industrial environments with extreme thermal cycling. |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed axial-leaded glass case with cathode indicated by colored 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 | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential. |
| Cathode | Zener regulation terminal / reverse-bias input | Banded end; must be held at higher voltage than anode to enter breakdown and regulate at 10.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 Qualification | JANTX level certified - guarantees reliability, screening, and traceability for defense and space applications. |
| Metallurgical Bond Construction | Internal metal-glass junction bond - enhances long-term stability and reduces parameter drift under thermal stress. |
| Low Capacitance | Minimal junction capacitance - preserves high-frequency response in transient suppression and signal conditioning paths. |
| Radiation Hardness | Inherently radiation tolerant per Microsemi MicroNote 050 - suitable for low-dose-rate space electronics without shielding overhead. |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulator or op-amp-based reference circuit. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing fixed 10.0 V reference point. Use Value: Enables ±5% regulation accuracy across -65 °C to +175 °C with no external bias components required. | Use Scenario: Clamping transient spikes on 12 V rail in avionics sensor interface. IC Role / Device Role / Timing Role: Shunt protection element diverting excess energy to ground above 10.0 V threshold. Use Value: Limits voltage excursion to safe levels using 1 µA leakage at 8.0 V and 0.5 W surge capability. |
| Temperature-Stable Biasing | Military Instrumentation Calibration |
Use Scenario: Setting bias point for RF amplifier stage requiring stable DC operating point. IC Role / Device Role / Timing Role: Precision DC voltage source compensating for transistor VBE drift. Use Value: +0.076 %/°C tempco allows predictable compensation modeling; DO-35 package supports through-hole rugged mounting. | Use Scenario: Calibrating multimeter reference divider in field-deployable test equipment. IC Role / Device Role / Timing Role: Primary voltage standard traceable to MIL-spec screening and lot control. Use Value: JANTX qualification ensures batch consistency, lifetime reliability, and full test data availability per MIL-PRF-19500. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N758A-1 | No "TR" tape-and-reel suffix; bulk or ammo-pack packaging only. | Lacks automated assembly compatibility; requires manual loading or re-taping for SMT lines. | Select 1N758A/TR when feeding pick-and-place machines; choose 1N758A-1 for hand-soldered prototyping or low-volume repair. |
| 1N758AUR-1 | DO-213AA (MELF) surface-mount package; same electrical specs but different thermal profile and mounting method. | Requires reflow-compatible PCB layout; unsuitable for through-hole boards or legacy chassis wiring. | Choose 1N758AUR-1 for space-constrained, high-reliability SMT designs; retain 1N758A/TR for axial-leaded, high-vibration mechanical mounting. |
Compared with 1N758A-1 and 1N758AUR-1, the 1N758A/TR provides identical Zener characteristics and MIL qualification while adding EIA-296 tape-and-reel packaging for automated manufacturing - making it the optimal choice for volume production of ruggedized, through-hole power reference circuits.
Availability
1N758A/TR is available at Aetrix Electronics and suitable for military-grade power supply reference, avionics overvoltage protection, and instrumentation calibration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N758A/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 1N758A/TR belongs to Microsemi's legacy 1N7xxA series of silicon Zener diodes - engineered specifically for defense, aerospace, and industrial applications demanding guaranteed performance under extreme environmental stress and long-term parametric stability.
FAQ
What is the nominal Zener voltage and tolerance of the 1N758A/TR?
The 1N758A/TR has a nominal Zener voltage of 10.0 V at IZT = 20 mA with a ±5% tolerance, meaning its actual breakdown voltage falls between 9.5 V and 10.5 V under specified test conditions. This tolerance is defined by the "A" suffix in the part number per JEDEC nomenclature and applies across the full operating temperature range of -65 °C to +175 °C.
Is the 1N758A/TR qualified to military specifications?
Yes, the 1N758A/TR is qualified to JANTX level per MIL-PRF-19500/127, including rigorous screening for vibration, shock, temperature cycling, and burn-in. The "TR" suffix denotes tape-and-reel packaging, but qualification status remains identical to the base 1N758A-1 part - ensuring full compliance for defense and aerospace applications requiring traceable, screened components.
What is the maximum power dissipation rating for the 1N758A/TR?
The 1N758A/TR is rated for 0.5 W average power dissipation at a lead temperature (TL) of +50 °C with 0.375 inch (9.53 mm) lead length from the body. Power linearly derates to zero at +175 °C, and when mounted on a PCB, it is rated for 0.4 W at TA = +55 °C - values confirmed in Microsemi T4-LDS-0288 Rev. 1.
Does the 1N758A/TR have RoHS-compliant packaging options?
Yes, the 1N758A/TR is available in a RoHS-compliant version with annealed matte-tin plating on leads, designated by the "e3" suffix in the full part number (e.g., 1N758A/TR e3). This option is limited to commercial-grade versions and is not offered for JAN/JANTX/JANTXV qualified units, which retain traditional tin-lead plating per MIL-STD-750.
How is polarity marked on the 1N758A/TR diode?
The 1N758A/TR uses a cathode band marking - a single colored band near one end of the DO-35 glass body - to indicate the cathode terminal. For proper Zener regulation, the banded end must be held at a higher potential than the opposite (anode) end. This polarity convention is consistent across all 1N7xxA-series Zeners and is documented in Microsemi's mechanical drawings and packaging notes.
1N758A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 8 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)
1N758A/TR FAQ
1.How can I place an order for 1N758A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N758A/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 1N758A/TR reliable?
The price and inventory of 1N758A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N758A/TR is usually 5 days.
3.What payment methods are accepted for 1N758A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N758A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N758A/TR?
1N758A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N758A/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 1N758A/TR?
For technical support, including 1N758A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N758A/TR requirements.
6.How does Aetrix verify that 1N758A/TR is sourced from the original manufacturer or authorized distributors?
All 1N758A/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 1N758A/TR meets industry standards.
7.What is the process for return or replacement of 1N758A/TR?
All 1N758A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N758A/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 1N758A/TR part is unused and in its original packaging.
Return procedure for 1N758A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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