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Microchip Technology 1N4735APE3/TR12
- Part No.:
- 1N4735APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4735APE3/TR12.pdf
- Description:
- DIODE ZENER 6.2V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
1N4735APE3/TR12 from Microsemi is a 6.2 V, ±5% tolerance, 1 W plastic-encapsulated Zener diode in DO-41 package, rated for 41 mA test current and 730 mA maximum regulator current at 50°C, used for precision voltage reference and overvoltage protection in linear power supplies and analog signal conditioning circuits.
For engineers reviewing the 1N4735APE3/TR12 datasheet, 1N4735APE3/TR12 pinout, 1N4735APE3/TR12 application, or 1N4735APE3/TR12 equivalent, key selection factors include Zener voltage tolerance, dynamic impedance (2 Ω @ 41 mA), thermal resistance (45 °C/W junction-to-lead), reverse leakage (10 μA @ 5 V), and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. It exhibits a sharp knee at 41 mA test current with dynamic impedance of 2 Ω and knee impedance of 1.0 Ω at 1 mA, ensuring low regulation error in feedback loops.
Designed for axial-lead mounting on FR4 PCBs with 1 oz copper, it delivers 1.0 W steady-state power at lead temperature <105°C or ambient <45°C, with thermal resistance of 105 °C/W junction-to-ambient under defined layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V ±5% - defines regulated output voltage in shunt reference applications |
| Test Current (IZT) | 41 mA - operating point where VZ and ZZT are specified; sets bias requirement for stable regulation |
| Dynamic Impedance (ZZT) | 2 Ω @ 41 mA - determines AC regulation error and ripple rejection capability |
| Max Regulator Current (IZM) | 730 mA at TL = 50°C - peak DC current before thermal runaway under derated conditions |
| Reverse Leakage (IR) | 10 μA @ 5 V - ensures minimal quiescent current in standby or high-impedance sensing nodes |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - enables thermal design with 3/8" lead length; critical for reliability in enclosed enclosures |
| Power Dissipation | 1.0 W at 25°C ambient - baseline rating; requires derating above 45°C on PCB or 105°C at lead |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by 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 | Reference ground node | Connected to circuit common; must be at lower potential than cathode during regulation |
| Cathode | Regulated output node | Banded end; connected to input rail or feedback point; maintains 6.2 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N4735A registration | Ensures mechanical and electrical interchangeability with industry-standard 6.2 V Zener designs |
| Plastic P-suffix construction | Reduces thermal resistance vs. glass-body variants, improving power handling in compact layouts |
| e3 RoHS-compliant plating | Matte-tin termination meets lead-free assembly requirements without compromising solderability |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for automated assembly |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020, reducing handling precautions in production |
Applications
| Linear Power Supply Reference | Analog Signal Clamping |
|---|---|
Use Scenario: Stabilizing output voltage in unregulated transformer-rectifier-filter supplies for op-amp rails or microcontroller logic. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback to series pass transistor or error amplifier. Use Value: Maintains 6.2 V ±5% across 1–730 mA load range with <2 Ω dynamic impedance, minimizing line/load regulation error. | Use Scenario: Limiting analog sensor output swing to protect ADC inputs from overvoltage damage. IC Role / Device Role / Timing Role: Bidirectional clamping element (forward-biased anode-cathode path + reverse Zener path). Use Value: Clips signals above 6.2 V + 1.2 V forward drop while drawing <10 μA below 5 V, preserving signal integrity. |
| Overvoltage Protection Circuit | Current Source Biasing |
Use Scenario: Safeguarding downstream ICs against transient surges in industrial 12 V or 24 V bus systems. IC Role / Device Role / Timing Role: Crowbar or shunt limiter activated when bus voltage exceeds 6.2 V threshold. Use Value: Absorbs up to 730 mA continuously at 50°C, enabling robust protection without external active components. | Use Scenario: Establishing stable bias current for LED drivers or transistor amplifiers requiring precise IREF. IC Role / Device Role / Timing Role: Constant-current source formed with series resistor and Zener-regulated voltage drop. Use Value: Delivers <1% current variation over 10–100 mA load due to low ZZT and tight VZ tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A-T | No e3 RoHS suffix; Sn/Pb plating; same VZ, IZT, ZZT, and package | Not suitable for lead-free reflow; otherwise identical performance in legacy assemblies | Select when RoHS compliance is not required and Sn/Pb process is in place |
| MMSZ4685-TP | Surface-mount SOD-123 package; 6.2 V ±5%; 500 mW rating; ZZT = 5 Ω @ 20 mA | Lower power and higher impedance limit use in high-current or low-noise references | Choose for space-constrained PCBs where 1 W dissipation is unnecessary |
Compared with 1N4735APE3/TR12, 1N4735A-T offers identical electrical behavior but lacks RoHS compliance, while MMSZ4685-TP trades power and impedance performance for miniaturization-making the 1N4735APE3/TR12 optimal for through-hole, high-reliability, lead-free power regulation.
Availability
1N4735APE3/TR12 is available at Aetrix Electronics and suitable for linear power supply reference, analog signal clamping, and overvoltage protection applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N4735APE3/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 timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standard, high-stability Zener regulation in plastic packages optimized for cost-sensitive yet thermally demanding power and protection circuits.
FAQ
What is the Zener voltage tolerance of the 1N4735APE3/TR12?
The 1N4735APE3/TR12 has a nominal Zener voltage of 6.2 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per JEDEC standard. This tolerance applies at 41 mA test current and 25°C lead temperature, and remains stable across its operating temperature range of –65°C to +150°C.
Does the 1N4735APE3/TR12 require dry packing before PCB assembly?
No, the 1N4735APE3/TR12 is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has no floor-life limitation and does not require dry packing or baking prior to reflow soldering. Its void-free epoxy body and RoHS-compliant matte-tin plating ensure robust manufacturability in standard SMT and through-hole processes.
What is the maximum continuous current the 1N4735APE3/TR12 can regulate at 50°C?
The 1N4735APE3/TR12 supports a maximum regulator current (IZM) of 730 mA at a lead temperature of 50°C. This value is derived from its 1.0 W power rating and thermal derating curve; operation above this current risks thermal runaway unless heatsinking or airflow is applied.
How does the dynamic impedance of the 1N4735APE3/TR12 affect its regulation performance?
The 1N4735APE3/TR12 has a dynamic impedance (ZZT) of 2 Ω at 41 mA test current, which directly determines how much output voltage varies with load current changes. A lower ZZT improves ripple rejection and load regulation-enabling stable 6.2 V reference even with ±100 mA load swings in feedback networks.
Is the 1N4735APE3/TR12 compatible with lead-free reflow soldering profiles?
Yes, the 1N4735APE3/TR12 features RoHS-compliant annealed matte-tin plating and is rated for solder temperatures up to 260°C for 10 seconds, fully supporting standard lead-free reflow profiles such as IPC/JEDEC J-STD-020. Its DO-41 package withstands thermal stress without delamination or plating degradation.
1N4735APE3/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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 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)
1N4735APE3/TR12 FAQ
1.How can I place an order for 1N4735APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4735APE3/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 1N4735APE3/TR12 reliable?
The price and inventory of 1N4735APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4735APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4735APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4735APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4735APE3/TR12?
1N4735APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4735APE3/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 1N4735APE3/TR12?
For technical support, including 1N4735APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4735APE3/TR12 requirements.
6.How does Aetrix verify that 1N4735APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4735APE3/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 1N4735APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4735APE3/TR12?
All 1N4735APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4735APE3/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 1N4735APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4735APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4735APE3/TR12 Tags
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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