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Microchip Technology 1N4758PE3/TR8
- Part No.:
- 1N4758PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4758PE3/TR8.pdf
- Description:
- DIODE ZENER 56V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,142
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Product details
Overview
1N4758PE3/TR8 from Microsemi is a 1.0 W, 56 V ±5% Zener diode in DO-41 plastic package, rated for 4.5 mA test current, 110 Ω dynamic impedance at IZT, and 2000 mA maximum surge current. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range (–65 °C to +150 °C).
For engineers reviewing the 1N4758PE3/TR8 datasheet, 1N4758PE3/TR8 pinout, 1N4758PE3/TR8 application, or 1N4758PE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), reverse leakage (<5 µA at 42.6 V), steady-state power derating above 45 °C ambient, and RoHS-compliant matte-tin plating.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across varying load and line conditions. Its 56 V nominal regulation point targets mid-range voltage reference needs where tighter tolerance than standard 10% parts is required but ultra-precision (e.g., ±1%) is unnecessary.
The DO-41 axial-leaded plastic package delivers 45 °C/W junction-to-lead thermal resistance at 10 mm lead length, enabling reliable 1.0 W dissipation at TL < 105 °C. Polarity is marked by cathode band; operation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 4.5 mA - defines stable regulation point under nominal bias |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous DC power handling with proper lead heatsinking |
| Dynamic Impedance (ZZT) | 110 Ω at 4.5 mA - indicates voltage stability under small-signal AC ripple superimposed on DC bias |
| Reverse Leakage Current | <5 µA at 42.6 V - ensures minimal shunt loss below knee voltage in standby or sensing modes |
| Surge Current (ISM) | 2000 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - determines temperature rise per watt when leads act as primary heat path |
| Operating Temperature | –65 °C to +150 °C - enables use in automotive under-hood, industrial control, and aerospace environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Body meets UL94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node / low-side connection | Connected to circuit ground or lower potential; reverse-biased during regulation |
| Cathode | Zener output / regulated voltage node | Banded end; held at stable 56 V above anode when reverse current ≥4.5 mA |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Industry-standard footprint and electrical behavior compatible with legacy designs and PCB footprints |
| RoHS-compliant "e3" suffix | Matte-tin terminal plating meeting EU RoHS Directive 2011/65/EU without lead or hexavalent chromium |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage logistics |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands typical board assembly electrostatic events without parameter shift |
| Plastic encapsulation (P suffix) | Lower thermal resistance vs. glass-body (G suffix) variants - improves power handling in compact layouts |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier loop. IC Role / Device Role / Timing Role: Zener diode provides precise 56 V reference to comparator or optocoupler input. Use Value: Maintains ±5% output regulation despite input ripple and load variation due to low dynamic impedance (110 Ω) and stable tempco. | Use Scenario: Clamping transient spikes on 48 V telecom or industrial bus lines. IC Role / Device Role / Timing Role: Shunts excess energy to ground when bus voltage exceeds 56 V threshold. Use Value: Withstands 2000 mA surge current for 1/120 s, protecting downstream MOSFETs and controllers without degradation. |
| Voltage Monitor Circuit | Field Instrument Calibration |
Use Scenario: Detecting undervoltage or overvoltage conditions in battery-powered remote sensors. IC Role / Device Role / Timing Role: Acts as threshold detector in conjunction with comparator; 56 V setpoint triggers alarm or shutdown. Use Value: Low reverse leakage (<5 µA at 42.6 V) minimizes quiescent current drain in always-on monitoring nodes. | Use Scenario: Providing traceable voltage reference in portable multimeter or calibrator test fixtures. IC Role / Device Role / Timing Role: Serves as secondary reference against which DMM accuracy is verified at 56 V point. Use Value: JEDEC registration and ±5% tolerance ensure interchangeability and repeatability across calibration labs and production test stations. |
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; Sn/Pb plating; same electrical specs and DO-41 package | Not compliant with RoHS Directive; restricted in EU consumer/industrial shipments | Select 1N4758A only for legacy non-RoHS programs or military screening with MQ/MX prefixes |
| MMBZ5256BS | SOT-23 surface-mount package; 56 V ±5%; 225 mW power rating; higher ZZT (150 Ω) | Lower power handling and different thermal profile; suited for space-constrained PCBs, not high-current clamping | Choose MMBZ5256BS when board area is critical and peak power ≤225 mW; not a drop-in replacement for 1N4758PE3/TR8 |
Compared with 1N4758A and MMBZ5256BS, the 1N4758PE3/TR8 offers RoHS compliance, full 1.0 W dissipation capability, and proven axial-leaded reliability for through-hole power regulation-making it optimal for industrial power supplies and ruggedized protection circuits where thermal mass and serviceability matter.
Availability
1N4758PE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom overvoltage protection, and field instrument calibration requiring stable component supply and long-term obsolescence management.
Supply support for 1N4758PE3/TR8 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 timing components for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was designed for robust, standardized voltage regulation in mission-critical power systems where JEDEC compatibility, thermal resilience, and long-lifecycle support are essential.
FAQ
What is the Zener voltage tolerance of the 1N4758PE3/TR8?
The 1N4758PE3/TR8 has a nominal Zener voltage of 56 V with a tolerance of ±5%, as confirmed by the "A" suffix in its JEDEC designation and specified in Microsemi's official datasheet revision C. This tolerance applies at 4.5 mA test current and 25 °C lead temperature. The "e3" suffix denotes RoHS compliance but does not affect voltage tolerance.
Does the 1N4758PE3/TR8 require dry packing before reflow soldering?
No, the 1N4758PE3/TR8 does not require dry packing. It is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking. This eliminates pre-reflow moisture removal steps and reduces handling complexity in manufacturing.
What is the maximum surge current rating for the 1N4758PE3/TR8?
The 1N4758PE3/TR8 is rated for a maximum surge current (ISM) of 2000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating supports transient clamping in industrial and telecom applications where short-duration overvoltages occur.
Can the 1N4758PE3/TR8 replace a glass-body 1N4758G in existing designs?
The 1N4758PE3/TR8 is electrically identical to the glass-body 1N4758G but uses a plastic DO-41 package with lower thermal resistance (45 °C/W vs. ~60 °C/W). Mechanical fit may differ due to body dimensions and lead stiffness; verify board clearance and mounting stress. Electrical substitution is valid if thermal margin allows.
What is the forward voltage specification for the 1N4758PE3/TR8?
The forward voltage of the 1N4758PE3/TR8 is specified as a maximum of 1.2 V at 200 mA forward current, per Microsemi's datasheet. This parameter is relevant for polarity-check circuits or forward-bias protection schemes but not for normal Zener regulation operation, which occurs in reverse bias.
1N4758PE3/TR8 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/TR8 FAQ
1.How can I place an order for 1N4758PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4758PE3/TR8 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/TR8 reliable?
The price and inventory of 1N4758PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4758PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4758PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4758PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4758PE3/TR8?
1N4758PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4758PE3/TR8 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/TR8?
For technical support, including 1N4758PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4758PE3/TR8 requirements.
6.How does Aetrix verify that 1N4758PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4758PE3/TR8 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/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4758PE3/TR8?
All 1N4758PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4758PE3/TR8, 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/TR8 part is unused and in its original packaging.
Return procedure for 1N4758PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4758PE3/TR8 Tags
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