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Microchip Technology 1N4736APE3/TR8
- Part No.:
- 1N4736APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736APE3/TR8.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,403
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Product details
Overview
1N4736APE3/TR8 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal Zener voltage of 6.8 V ±5%, 37 mA test current (IZT), 3.5 Ω dynamic impedance (ZZT), and maximum reverse leakage of 10 μA at 4 V. It operates from –65 °C to +150 °C and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the 1N4736APE3/TR8 datasheet, 1N4736APE3/TR8 pinout, 1N4736APE3/TR8 application, or 1N4736APE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (660 mA), RoHS-compliant matte-tin plating, and DO-41 package compatibility with standard axial-lead PCB layouts.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown, where regulation occurs across a defined current range (IZK = 1 mA to IZM = 660 mA at TA = 50 °C). Its 6.8 V nominal Zener voltage exhibits a low temperature coefficient near zero crossing, making it suitable for stable mid-range references.
The DO-41 plastic package provides Level 1 moisture sensitivity per J-STD-020B, eliminating dry-pack requirements, and features tin-lead or RoHS-compliant matte-tin terminations solderable per MIL-STD-750 Method 2026. Thermal performance is specified at 3/8″ (10 mm) lead length from body (45 °C/W) and on FR4 board (105 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% at IZT = 37 mA - defines regulated output level with tight production consistency |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load under lead-temperature-limited conditions |
| Dynamic Impedance (ZZT) | 3.5 Ω at IZT = 37 mA - determines output voltage variation under changing load current |
| Reverse Leakage (IR) | ≤10 μA at VR = 4 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Surge Current (ISM) | 660 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead conduction path in chassis-mounted or heatsink-coupled layouts |
| Operating Temperature | –65 °C to +150 °C - qualifies for industrial, automotive under-hood, and aerospace environments |
Pinout & Package
Package: DO-41 (DO-204AL), axial-lead plastic encapsulated case with cathode band marking. Moisture sensitivity Level 1; no dry pack required. RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in Zener configuration | Connected to lower-potential side of regulated circuit; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; connected to higher-potential side; maintains 6.8 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Industry-standard footprint and electrical behavior enabling drop-in replacement across multiple suppliers |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants-improves power handling in compact layouts |
| e3 RoHS-compliant termination | Matte-tin plating compatible with lead-free reflow and wave soldering processes per JEDEC J-STD-020 |
| Level 1 moisture sensitivity | No baking or dry-pack required before assembly-reduces manufacturing overhead and floor-life constraints |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables handling without special static controls in standard production areas |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler feedback network of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference providing stable 6.8 V threshold to drive optocoupler LED current. Use Value: Maintains ±5% output regulation across line/load/temperature with minimal drift due to low knee impedance (ZZK = 400 Ω at IZK = 1 mA). | Use Scenario: Placed across sensitive IC inputs to shunt transient surges exceeding safe logic thresholds. IC Role / Device Role / Timing Role: Clamping element limiting voltage to ≤6.8 V during ESD or inductive kick events. Use Value: Withstands 660 mA non-repetitive surge (1/120 s) without parametric shift-protects downstream CMOS inputs rated for 7 V max. |
| Fixed Voltage Reference | Current Source Bias Network |
Use Scenario: Providing stable bias to op-amp input stages or ADC reference dividers in data acquisition modules. IC Role / Device Role / Timing Role: Two-terminal passive reference establishing precise 6.8 V node independent of supply variation. Use Value: Delivers <10 μA leakage at 4 V reverse bias-minimizes error in high-impedance divider networks feeding precision analog circuits. | Use Scenario: Configured with series resistor to generate constant current for LED drivers or sensor excitation. IC Role / Device Role / Timing Role: Voltage-regulating element setting forward drop across current-setting resistor. Use Value: Stable 6.8 V regulation enables predictable current (e.g., 10 mA with 680 Ω) across –40 °C to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A (Microsemi) | No e3 suffix; Sn/Pb termination; same electrical specs and DO-41 package | Not RoHS-compliant; requires leaded solder process | Select when legacy Pb-based assembly is mandated and exemption from RoHS applies |
| MMBZ5235B (ON Semiconductor) | SOT-23 surface-mount package; 6.8 V ±5%; 200 mW rating; 10 Ω ZZT | Lower power and smaller footprint; unsuitable for >200 mW continuous dissipation | Choose for space-constrained PCBs where thermal load remains below 200 mW |
Compared with 1N4736APE3/TR8, the 1N4736A lacks RoHS compliance but matches all electrical and mechanical specs, while MMBZ5235B offers SMT compatibility at reduced power and higher dynamic impedance-making the former ideal for drop-in replacement in through-hole designs and the latter for miniaturized low-power systems.
Availability
1N4736APE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and fixed-voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N4736APE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed to deliver JEDEC-standard, high-stability Zener regulation in ruggedized plastic packages for mission-critical power management and protection functions.
FAQ
What is the Zener voltage tolerance of the 1N4736APE3/TR8?
The 1N4736APE3/TR8 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per JEDEC registration. This tolerance is verified at 37 mA test current and 25 °C lead temperature. The 1N4736APE3/TR8 maintains this specification across its qualified operating temperature range and is traceable to Microsemi's production test data.
Does the 1N4736APE3/TR8 require dry packing before PCB assembly?
No, the 1N4736APE3/TR8 does not require dry packing. It is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without baking or desiccant packaging. This simplifies handling and eliminates floor-life tracking for the 1N4736APE3/TR8 in standard SMT or through-hole assembly lines.
What is the maximum steady-state power dissipation for the 1N4736APE3/TR8?
The 1N4736APE3/TR8 is rated for 1.0 W steady-state power dissipation at a lead temperature (TL) below 105 °C with 3/8″ (10 mm) lead length from the body. When mounted on FR4 board with specified copper area, derating applies above 45 °C ambient-full power is not sustainable under board-level convection-only cooling. This limit directly governs thermal design margins for the 1N4736APE3/TR8 in enclosed or high-ambient environments.
How is polarity marked on the 1N4736APE3/TR8?
The 1N4736APE3/TR8 uses a cathode band-typically a single black or dark stripe-to identify the cathode terminal. For proper Zener operation, the banded end must be held at a higher potential than the anode. This marking is laser-etched or molded into the DO-41 plastic body and is visible on both ends of the 1N4736APE3/TR8 device for unambiguous orientation during manual or automated placement.
Is the 1N4736APE3/TR8 suitable for surge protection applications?
Yes, the 1N4736APE3/TR8 supports non-repetitive surge clamping with a rated 660 mA peak reverse current (ISM) measured using a ½-sine wave pulse of 1/120 second duration. This capability allows the 1N4736APE3/TR8 to absorb transient energy in overvoltage events such as ESD or inductive switching spikes without permanent parameter shift-provided average power remains within 1.0 W limits.
1N4736APE3/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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4 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)
1N4736APE3/TR8 FAQ
1.How can I place an order for 1N4736APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736APE3/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 1N4736APE3/TR8 reliable?
The price and inventory of 1N4736APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4736APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736APE3/TR8?
1N4736APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736APE3/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 1N4736APE3/TR8?
For technical support, including 1N4736APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736APE3/TR8 requirements.
6.How does Aetrix verify that 1N4736APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4736APE3/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 1N4736APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4736APE3/TR8?
All 1N4736APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736APE3/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 1N4736APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4736APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736APE3/TR8 Tags
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