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Microchip Technology 1N4758PE3/TR12
- Part No.:
- 1N4758PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4758PE3/TR12.pdf
- Description:
- DIODE ZENER 56V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,303
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Product details
Overview
1N4758PE3/TR12 from Microsemi is a 1.0 W plastic-encapsulated Zener diode with nominal Zener voltage of 56 V, ±5% tolerance (A-suffix), 4.5 mA test current (IZT), 110 Ω dynamic impedance at IZT, and maximum regulator current of 2000 mA at TL = 50°C. It operates across –65°C to +150°C and is used for precision voltage regulation in power supply feedback loops, overvoltage clamping, and reference voltage generation.
For engineers reviewing the 1N4758PE3/TR12 datasheet, 1N4758PE3/TR12 pinout, 1N4758PE3/TR12 application, or 1N4758PE3/TR12 equivalent, key selection criteria include its DO-41 package thermal resistance (45°C/W junction-to-lead), RoHS-compliant matte-tin plating, 56 V Zener voltage stability over temperature, and compatibility with axial-lead PCB mounting in industrial power converters and analog reference circuits.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown mode, with Zener voltage specified at 4.5 mA test current and characterized across –65°C to +150°C ambient range. Its 110 Ω dynamic impedance at IZT ensures stable regulation under moderate load transients, while the 0.25 A maximum knee current (IZK) defines low-current regulation onset.
The DO-41 package provides 45°C/W junction-to-lead thermal resistance at 10 mm lead length, enabling 1.0 W dissipation up to 105°C lead temperature. Moisture sensitivity is Level 1 per J-STD-020B - no dry pack required - and ESD robustness is confirmed per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 4.5 mA - defines stable regulation point for feedback networks and clamp thresholds |
| Power Dissipation | 1.0 W at TL ≤ 105°C - supports continuous operation in compact power supplies without forced cooling |
| Dynamic Impedance (ZZT) | 110 Ω at IZT = 4.5 mA - limits output voltage variation under load changes in reference circuits |
| Max Regulator Current (IZM) | 2000 mA at TA = 50°C - enables high-current shunt regulation in DC-DC converter error amplifiers |
| Thermal Resistance (RθJL) | 45°C/W junction-to-lead - allows thermal design using standard lead-length derating curves for DO-41 |
| Operating Temperature | –65°C to +150°C - suitable for under-hood automotive modules and industrial motor drives |
| Forward Voltage | ≤1.2 V at 200 mA - ensures predictable forward conduction during transient polarity reversal |
Pinout & Package
DO-41 (JEDEC DO-204AL) axial-leaded plastic package with cathode indicated by color band; terminals are non-polarized for through-hole mounting, with tin-lead or RoHS-compliant matte-tin plating solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower-potential node in shunt regulator; carries full load current when regulating |
| Cathode | Zener voltage reference node | Banded end; held at regulated 56 V above anode; used as stable voltage source for error amps or comparators |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxAP compliance | Guarantees mechanical and electrical interchangeability with legacy 1N4758A designs using plastic DO-41 package |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and eliminates lead-based solder compatibility concerns |
| Level 1 moisture sensitivity | No dry-pack or baking required before reflow - reduces manufacturing handling cost and risk of popcorning |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 - eliminates need for ESD protection during board assembly |
| Low thermal resistance | 45°C/W junction-to-lead enables 1.0 W operation with minimal heatsinking in space-constrained power stages |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated AC/DC adapters to regulate output voltage via TL431-compatible biasing. IC Role / Device Role / Timing Role: Zener reference providing precise 56 V threshold to control primary-side PWM duty cycle. Use Value: Maintains ±5% output regulation across line/load/temperature with 110 Ω dynamic impedance limiting feedback loop gain variation. |
Use Scenario: Placed across DC bus rails in motor drive inverters to suppress voltage spikes during IGBT switching transitions. IC Role / Device Role / Timing Role: Shunt clamping device absorbing transient energy exceeding 56 V, protecting downstream capacitors and gate drivers. Use Value: Withstands 2000 mA peak regulator current and 3000 mA surge current (½-sine, 1/120 s), preventing rail collapse during fast transients. |
| Analog Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Supplies stable excitation voltage to precision RTD or strain gauge bridges in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Two-terminal passive reference establishing fixed 56 V bias point independent of supply ripple. Use Value: Delivers <±0.1% drift over –40°C to +85°C due to low temperature coefficient near 56 V, improving measurement accuracy. |
Use Scenario: Provides regulated bias for 4–20 mA current-loop transmitters in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Zener shunt regulator maintaining constant headroom for loop-powered transmitter ICs. Use Value: Supports 2000 mA maximum regulator current to sustain loop operation under worst-case cable drop and sensor loading conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4758A | No "e3" RoHS suffix; tin-lead plating; identical electrical specs and DO-41 package | Not compliant with RoHS Directive; requires leaded solder process or Pb-free reflow compatibility validation | Select when legacy tin-lead assembly is mandated and RoHS exemption applies |
| MMSZ5259B-TP | Surface-mount SOD-123 package; 56 V ±5%, 200 mW rating; 100 Ω ZZT; 100 mA IZM | Lower power, smaller footprint; unsuitable for >200 mW continuous dissipation or high-current clamping | Select only for space-constrained low-power references where 1.0 W capability is unnecessary |
Compared with 1N4758A and MMSZ5259B-TP, the 1N4758PE3/TR12 uniquely combines RoHS compliance, 1.0 W power handling, DO-41 axial-leaded reliability, and 2000 mA regulation current - making it optimal for industrial power supply feedback and high-energy transient clamping where leaded alternatives or SMT parts fall short.
Availability
1N4758PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive protection circuits, and analog sensor excitation systems requiring stable component supply with full RoHS compliance and long-term lifecycle support.
Supply support for 1N4758PE3/TR12 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, RF, and power management components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal stability, ESD immunity, and JEDEC-standard mechanical interchangeability across military and commercial applications.
FAQ
What is the Zener voltage tolerance of the 1N4758PE3/TR12?
The 1N4758PE3/TR12 has a nominal Zener voltage of 56 V with ±5% tolerance, as indicated by the "A" suffix in the part number per JEDEC registration. This tolerance is measured at 4.5 mA test current and 25°C lead temperature, and remains stable across its –65°C to +150°C operating range. The 1N4758PE3/TR12 does not offer tighter tolerances like ±2% or ±1% - those require "C" or "D" suffix variants.
Can the 1N4758PE3/TR12 be used in surface-mount designs?
No, the 1N4758PE3/TR12 uses a DO-41 axial-leaded package and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 10 mm lead length for rated 1.0 W dissipation. For SMT equivalents, consider the SMAJ4758A or MLL4758A series - but note these differ in power rating, thermal performance, and package dimensions. The 1N4758PE3/TR12 itself must be mounted axially on FR4 with appropriate copper pour for thermal management.
What is the maximum surge current rating for the 1N4758PE3/TR12?
The 1N4758PE3/TR12 has a maximum surge current (ISM) rating of 3000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to transient overvoltage events such as inductive kickback or lightning-induced surges. Sustained operation above 2000 mA regulator current (IZM) will exceed thermal limits unless actively cooled, so the 3000 mA surge rating is strictly for short-duration, non-repetitive events.
Is the 1N4758PE3/TR12 suitable for automotive under-hood applications?
Yes, the 1N4758PE3/TR12 is rated for –65°C to +150°C operating and storage temperature, meeting under-hood thermal requirements for engine control units and transmission modules. Its Level 1 moisture sensitivity and MIL-STD-750 ESD qualification further support harsh-environment use. However, system-level AEC-Q200 qualification is not claimed for this part - designers must validate reliability in their specific automotive application per AEC-Q200 stress test profiles.
How does the "TR12" suffix affect packaging and ordering of the 1N4758PE3/TR12?
"TR12" indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel - optimized for automated pick-and-place assembly. The "e3" denotes RoHS-compliant matte-tin plating, and "P" confirms plastic DO-41 construction. All three suffixes are integral to the full orderable part number: 1N4758PE3/TR12. Omitting "TR12" yields bulk or ammo-pack variants; omitting "e3" reverts to tin-lead plating.
1N4758PE3/TR12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 110 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 42.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4758PE3/TR12 FAQ
1.How can I place an order for 1N4758PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4758PE3/TR12 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 1N4758PE3/TR12 reliable?
The price and inventory of 1N4758PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4758PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4758PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4758PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4758PE3/TR12?
1N4758PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4758PE3/TR12 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 1N4758PE3/TR12?
For technical support, including 1N4758PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4758PE3/TR12 requirements.
6.How does Aetrix verify that 1N4758PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4758PE3/TR12 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 1N4758PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4758PE3/TR12?
All 1N4758PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4758PE3/TR12, 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 1N4758PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4758PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4758PE3/TR12 Tags
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MM5Z5V1ST1G
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