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Microchip Technology 1N4755CPE3/TR8
- Part No.:
- 1N4755CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4755CPE3/TR8.pdf
- Description:
- DIODE ZENER 43V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,375
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Product details
Overview
1N4755CPE3/TR8 from Microsemi is a 1.0 W, 43 V ±2% tolerance silicon Zener diode in DO-41 plastic package, rated for 6.0 mA test current (IZT), 22 Ω dynamic impedance (ZZT), and 1500 mA maximum regulator current (IZM) at 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4755CPE3/TR8 datasheet, 1N4755CPE3/TR8 pinout, 1N4755CPE3/TR8 application, or 1N4755CPE3/TR8 equivalent, key selection criteria include its tight ±2% Zener voltage tolerance, 1.0 W power rating at 25°C with defined thermal derating, DO-41 axial-leaded mechanical form factor, and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This Zener operates in reverse breakdown to maintain stable 43 V output across a wide operating current range (1–1500 mA) and temperature span (−65°C to +150°C). Its 22 Ω dynamic impedance at 6.0 mA ensures low AC ripple sensitivity, while the 0.25 A maximum surge current (ISM) supports transient suppression in DC rails.
The device uses a void-free thermosetting epoxy case (UL94V-0), cathode band polarity marking, and is moisture-sensitive Level 1 per IPC/JEDEC J-STD-020B-no dry pack required. Thermal resistance is 45°C/W junction-to-lead (3/8″ lead length) and 105°C/W junction-to-ambient on FR4 with specified copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43.0 V ±2% at 6.0 mA - enables precise 43 V reference generation with low tolerance drift |
| Power Dissipation | 1.0 W at 25°C TL - defines maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (ZZT) | 22 Ω @ IZT = 6.0 mA - determines AC regulation stability under varying load currents |
| Max Regulator Current (IZM) | 1500 mA at TA = 50°C - sets upper limit for sustained Zener conduction without thermal runaway |
| Reverse Leakage (IR) | 5 μA @ VR = 32.7 V - confirms low off-state current below knee voltage, critical for standby efficiency |
| Forward Voltage (VF) | 1.2 V max @ 200 mA - specifies forward conduction drop when used as clamp or rectifier in dual-role designs |
| Thermal Resistance | 45°C/W junction-to-lead - informs heatsinking requirements for lead-mounted PCB layouts |
Pinout & Package
DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by 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 lead | Connected to lower-potential node; forward bias path during non-regulation operation |
| Cathode | Banded lead | Connected to higher-potential node; Zener breakdown occurs with cathode positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in 43 V systems |
| RoHS-compliant "e3" suffix | Meets global environmental compliance mandates with annealed matte-tin plating |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT assembly prep |
| Nonsensitive to ESD | Withstands MIL-STD-750 Method 1020 testing-reduces handling precautions in production |
| Plastic P-suffix construction | Delivers lower thermal resistance than glass-body equivalents (G-suffix), improving power reliability |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 43 V reference in linear regulator feedback networks or ADC reference dividers. IC Role / Device Role / Timing Role: Precision voltage reference element providing regulated bias point. Use Value: ±2% tolerance and 22 Ω dynamic impedance ensure <±0.86 V deviation across load and temperature variations. | Use Scenario: Clamping transient spikes on 48 V DC distribution rails in industrial controllers. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting excess energy to ground. Use Value: 1500 mA IZM rating supports sustained clamping of 43 V surges without thermal failure. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating fixed 43 V bias for op-amp input stages in high-voltage sensor interfaces. IC Role / Device Role / Timing Role: Fixed-voltage bias generator stabilizing amplifier operating points. Use Value: Low 5 μA leakage at 32.7 V ensures minimal error injection into high-impedance analog nodes. | Use Scenario: Setting constant current in LED driver or laser diode bias circuits via series resistor + Zener. IC Role / Device Role / Timing Role: Voltage-defined current reference node. Use Value: 1.0 W power rating allows ≥23 mA current sourcing (43 V / 1.87 kΩ) with margin for ambient rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4755A | Same 43 V nominal, but ±5% tolerance (A suffix) vs. ±2% (C suffix) | Less suitable for precision references; acceptable for general-purpose clamping | Select 1N4755CPE3/TR8 when ±2% accuracy is required; choose 1N4755A for cost-sensitive, non-critical regulation |
| MMSZ43ET1G | Surface-mount SOD-123 package, 43 V ±5%, 500 mW rating, 30 Ω ZZT | Not interchangeable due to lower power, different footprint, and looser tolerance | Use MMSZ43ET1G only in space-constrained, low-power SMT designs where 1N4755CPE3/TR8's axial DO-41 form is impractical |
Compared with 1N4755A and MMSZ43ET1G, the 1N4755CPE3/TR8 uniquely combines ±2% tolerance, 1.0 W power, and DO-41 through-hole compatibility-making it optimal for robust, precision 43 V regulation in industrial power supplies and test equipment where thermal margin and accuracy are jointly critical.
Availability
1N4755CPE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, test instrumentation, and embedded control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4755CPE3/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 discrete components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for ruggedized, precision voltage regulation in harsh-environment power systems-emphasizing thermal stability, ESD immunity, and JEDEC-standardized performance.
FAQ
What is the Zener voltage tolerance of the 1N4755CPE3/TR8?
The 1N4755CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 43 V breakdown voltage is guaranteed between 42.14 V and 43.86 V when measured at 6.0 mA test current and 25°C lead temperature-critical for high-accuracy reference designs where tighter regulation is required than the standard ±5% (A suffix) version offers.
What does the "e3" suffix indicate on the 1N4755CPE3/TR8?
The "e3" suffix on the 1N4755CPE3/TR8 signifies RoHS-compliant construction with annealed matte-tin plating on the leads, meeting EU Directive 2011/65/EU. This replaces traditional tin-lead finishes while maintaining solderability per MIL-STD-750 Method 2026-ensuring compatibility with modern lead-free reflow and wave soldering processes without compromising joint reliability.
Can the 1N4755CPE3/TR8 be used in surface-mount designs?
No-the 1N4755CPE3/TR8 is packaged in the axial-leaded DO-41 (DO-204AL) case and is not suitable for surface-mount assembly. For SMT alternatives, consider Microsemi's MLL4755 or ON Semiconductor's MMSZ43ET1G-but note these differ in power rating, tolerance, and impedance. The 1N4755CPE3/TR8 requires through-hole mounting with 3/8″ lead length for thermal performance validation.
What is the maximum steady-state power dissipation for the 1N4755CPE3/TR8?
The 1N4755CPE3/TR8 is rated for 1.0 W steady-state power dissipation at 25°C lead temperature (TL), with linear derating above that point: 8.3 mW/°C above 25°C up to 105°C TL. When mounted on FR4 with specified copper pads, its ambient-rated power drops to 1.0 W only below 45°C ambient-so thermal design must account for both lead and board conduction paths to avoid exceeding junction limits.
How is polarity marked on the 1N4755CPE3/TR8?
The 1N4755CPE3/TR8 uses a cathode band-typically a single black or dark-colored stripe-to mark the cathode terminal. For proper Zener regulation, the banded end must be held at a higher potential than the unmarked (anode) end. Reversing polarity places the device in forward conduction (≤1.2 V drop), disabling regulation and potentially causing excessive current if uncurrent-limited.
1N4755CPE3/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):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 32.7 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)
1N4755CPE3/TR8 FAQ
1.How can I place an order for 1N4755CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4755CPE3/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 1N4755CPE3/TR8 reliable?
The price and inventory of 1N4755CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4755CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4755CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4755CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4755CPE3/TR8?
1N4755CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4755CPE3/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 1N4755CPE3/TR8?
For technical support, including 1N4755CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4755CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4755CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4755CPE3/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 1N4755CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4755CPE3/TR8?
All 1N4755CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4755CPE3/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 1N4755CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4755CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4755CPE3/TR8 Tags
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