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Microchip Technology 1N4735P/TR12
- Part No.:
- 1N4735P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4735P/TR12.pdf
- Description:
- DIODE ZENER 6.2V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
1N4735P/TR12 from Microsemi is a 1.0 W silicon Zener diode with a nominal zener voltage of 6.2 V ±5%, designed for precision voltage regulation in power supply feedback paths, reference circuits, and overvoltage protection. It operates across –65°C to +150°C, delivers 41 mA test current (IZT), exhibits 2 Ω dynamic impedance (ZZT) at IZT, and features DO-41 axial-leaded plastic packaging.
For engineers reviewing the 1N4735P/TR12 datasheet, 1N4735P/TR12 pinout, 1N4735P/TR12 application, or 1N4735P/TR12 equivalent, key selection criteria include its 6.2 V regulation tolerance, 1.0 W steady-state dissipation at TL < 105°C, 41 mA Zener test current, 2 Ω dynamic impedance, and RoHS-compliant "e3" plating option (though TR12 denotes tape-and-reel packaging).
Technical Context
The 1N4735P/TR12 functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its regulation stability relies on controlled avalanche behavior at 6.2 V, with a sharp knee defined by ZZK = 500 Ω at IZK = 1.0 mA and maximum IR = 10 μA at VR = 3 V.
Thermal performance is defined by junction-to-lead thermal resistance of 45°C/W (at 10 mm lead length) and junction-to-ambient resistance of 105°C/W on FR4 board (4 mm² copper pad). Forward voltage is capped at 1.2 V @ 200 mA, confirming standard silicon PN junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 6.2 V ±5% at IZT = 41 mA - defines stable regulation point for feedback loops |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load on leads |
| Dynamic Impedance (ZZT) | 2 Ω @ IZT - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 10 μA max @ VR = 3 V - confirms low standby current in undervoltage conditions |
| Max Regulator Current (IZM) | 700 mA at TA = 50°C - determines absolute safe operating current limit |
| Knee Impedance (ZZK) | 500 Ω @ IZK = 1.0 mA - indicates onset sharpness of breakdown region |
| Operating Temp Range | –65°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode band marking; moisture sensitivity level 1 (no dry pack required); RoHS-compliant matte-tin plating; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; supplies stable 6.2 V to load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxA series | Industry-standard footprint and electrical compatibility with legacy designs |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants - improves power handling |
| 5% voltage tolerance (A suffix) | Meets general-purpose regulation accuracy without premium cost of tighter tolerances |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special handling during assembly or field service |
| Tape-and-reel packaging (TR12) | Enables automated pick-and-place placement for high-volume PCB assembly |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference element setting precise 6.2 V threshold for TL431 or similar shunt regulator control. Use Value: Enables ±5% output regulation stability across line/load/temperature with minimal BOM count. | Use Scenario: Clamps transient surges on 5 V or 12 V rail caused by inductive switching or ESD events. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing energy above 6.2 V while limiting peak voltage to safe levels. Use Value: Prevents damage to downstream logic or analog ICs without requiring active control circuitry. |
| Low-Cost Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Provides stable bias voltage for op-amp comparators or ADC reference dividers in cost-sensitive instrumentation. IC Role / Device Role / Timing Role: Passive reference source replacing more expensive precision references where ±5% tolerance suffices. Use Value: Reduces system cost while maintaining adequate accuracy for non-critical measurement thresholds. | Use Scenario: Supplies excitation voltage to resistive temperature detectors (RTDs) or strain gauges in factory automation modules. IC Role / Device Role / Timing Role: Stable 6.2 V source enabling ratiometric measurement against known reference. Use Value: Improves long-term drift performance versus raw supply rails, especially in wide-temperature environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | No TR12 tape-and-reel packaging; bulk or ammo-pack only; otherwise identical electrical specs | Not suitable for automated SMT assembly; requires manual or vibratory feeding | Select 1N4735A only for prototyping or low-volume hand-soldered builds |
| BZX55C6V2 | Same 6.2 V ±5%, but DO-35 glass package; higher thermal resistance (75°C/W); 500 mW rating | Limited to lower-power applications; less robust mechanical mounting than DO-41 | Choose BZX55C6V2 only when legacy DO-35 footprint compatibility is mandatory |
Compared with 1N4735A and BZX55C6V2, the 1N4735P/TR12 offers superior thermal performance (45°C/W), full 1.0 W dissipation capability, and automated assembly readiness - making it optimal for production-grade power management and industrial control designs.
Availability
1N4735P/TR12 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage clamping circuits, low-cost voltage references, and industrial sensor excitation requiring stable component supply and consistent parametric performance across manufacturing lots.
Supply support for 1N4735P/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 discrete components for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered specifically for ruggedized voltage regulation in harsh-environment power systems - emphasizing thermal robustness, JEDEC standardization, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N4735P/TR12?
The 1N4735P/TR12 has a nominal Zener voltage of 6.2 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is measured at 25°C lead temperature with 41 mA test current and applies across the full operating temperature range of –65°C to +150°C per Microsemi's published specifications for the 1N4735P/TR12.
Does the 1N4735P/TR12 require dry packing due to moisture sensitivity?
No, the 1N4735P/TR12 is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not require dry packing or baking prior to soldering. Its void-free thermosetting epoxy body provides inherent moisture resistance, supporting standard reflow and wave soldering processes without preconditioning.
What is the maximum surge current rating for the 1N4735P/TR12?
The 1N4735P/TR12 has a maximum surge current (ISM) rating of 700 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This value reflects its ability to absorb short-duration overcurrent events without degradation, as specified in Microsemi's 1N4728AP–1N4764AP datasheet revision C.
Can the 1N4735P/TR12 be used in surface-mount designs?
No, the 1N4735P/TR12 uses a DO-41 axial-leaded package and is not a surface-mount device. For SMT equivalents, Microsemi offers the SMAJ4735A and MLL4735A - both share identical electrical characteristics but use DO-214AC and SOD-123 packages respectively.
What does the "TR12" suffix indicate in 1N4735P/TR12?
"TR12" denotes EIA-296 standard tape-and-reel packaging containing 12,000 units per reel, optimized for automated pick-and-place assembly. The base part 1N4735P specifies plastic DO-41 construction with RoHS-compliant plating; TR12 adds logistics and manufacturability functionality without altering electrical or thermal parameters of the 1N4735P/TR12.
1N4735P/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:
- ±10%
- 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)
1N4735P/TR12 FAQ
1.How can I place an order for 1N4735P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4735P/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 1N4735P/TR12 reliable?
The price and inventory of 1N4735P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4735P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4735P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4735P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4735P/TR12?
1N4735P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4735P/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 1N4735P/TR12?
For technical support, including 1N4735P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4735P/TR12 requirements.
6.How does Aetrix verify that 1N4735P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4735P/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 1N4735P/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4735P/TR12?
All 1N4735P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4735P/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 1N4735P/TR12 part is unused and in its original packaging.
Return procedure for 1N4735P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4735P/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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