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Microchip Technology 1N4736AP/TR12
- Part No.:
- 1N4736AP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736AP/TR12.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,121
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Product details
Overview
1N4736AP/TR12 from Microsemi is a 1.0 W, 6.8 V ±5% plastic-encapsulated Zener diode in DO-41 package, designed for precision voltage regulation in power supply feedback loops, reference circuits, and overvoltage protection. It delivers stable Zener voltage at 37 mA test current, with dynamic impedance of 3.5 Ω and maximum reverse leakage of 10 μA at 4 V.
For engineers reviewing the 1N4736AP/TR12 datasheet, 1N4736AP/TR12 pinout, 1N4736AP/TR12 application, or 1N4736AP/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (660 mA), RoHS-compliant "e3" plating, and tape-and-reel packaging per EIA-296.
Technical Context
This device operates in reverse breakdown to maintain a stable 6.8 V reference across a wide current range (0.25–660 mA). Its low dynamic impedance (3.5 Ω at 37 mA) ensures minimal voltage variation under load transients, while its −65 °C to +150 °C operating temperature range supports industrial and automotive environments.
The DO-41 axial-leaded package provides flexible through-hole mounting with 0.7 g mass and UL94V-0 epoxy body. Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode for regulation. Thermal performance is specified at 3/8″ (10 mm) lead length from body (45 °C/W) or 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 nominal regulation point with tight tolerance for stable reference generation |
| Power Dissipation | 1.0 W at TL < 105 °C - limits continuous thermal stress with defined derating above 25 °C ambient |
| Dynamic Impedance (ZZT) | 3.5 Ω at IZT = 37 mA - determines output voltage ripple sensitivity to current changes in regulation loop |
| Maximum Reverse Leakage | 10 μA at VR = 4 V - ensures low standby power loss before breakdown threshold |
| Surge Current (ISM) | 660 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables accurate thermal design for PCB trace heat sinking |
| Forward Voltage | ≤1.2 V at 200 mA - defines conduction behavior during forward-biased fault conditions |
Pinout & Package
DO-41 (JEDEC DO-204AL) plastic axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in Zener regulator circuit | Connected to system ground or lower-potential rail; carries full Zener current during regulation |
| Cathode | Regulated output node | Banded end; held at stable 6.8 V above anode; supplies reference voltage to error amplifier or protection comparator |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Industry-standard footprint and electrical behavior enabling direct substitution in legacy designs |
| Moisture Sensitivity Level 1 | No dry pack required prior to soldering - reduces manufacturing handling overhead and BOM complexity |
| RoHS-compliant "e3" suffix option | Matte-tin plating meets EU Directive 2011/65/EU without lead content - supports global compliance programs |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model ESD events up to ±2 kV without parameter shift - simplifies handling in assembly |
| Tape-and-reel packaging (TR12) | Standard EIA-296 carrier tape with 12 mm width - enables automated pick-and-place for high-volume production |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback networks to regulate 5–12 V DC outputs. IC Role / Device Role / Timing Role: Provides precise 6.8 V reference for error amplifier comparison against output divider voltage. Use Value: Enables ±1% output regulation accuracy due to tight 5% VZ tolerance and low 3.5 Ω ZZT. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transients exceeding 6.8 V. IC Role / Device Role / Timing Role: Acts as shunt protector by conducting surge current when line voltage exceeds breakdown threshold. Use Value: Absorbs 660 mA surge pulses without degradation, protecting downstream logic from >7 V spikes. |
| Low-Power Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Supplies stable bias to analog front-ends in battery-powered instrumentation. IC Role / Device Role / Timing Role: Delivers low-drift 6.8 V reference for ADC reference buffers or DAC output scaling. Use Value: Maintains regulation over −40 °C to +85 °C with <10 μA leakage below 4 V, minimizing quiescent current draw. | Use Scenario: Powers resistive bridge sensors (e.g., strain gauges) requiring stable excitation voltage. IC Role / Device Role / Timing Role: Serves as low-noise, constant-voltage source for Wheatstone bridge biasing. Use Value: Low dynamic impedance ensures minimal voltage droop during sensor current variations, improving measurement linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A (DO-41, bulk) | No TR12 tape-and-reel packaging; same electrical specs and DO-41 package | Not suitable for automated SMT assembly; requires manual or vibration-feed placement | Select 1N4736AP/TR12 for high-volume production; choose 1N4736A for prototyping or low-run builds |
| MMBZ5235B (SOT-23) | Surface-mount package; 6.8 V ±5%, but rated at 0.225 W and 20 mA IZT | Lower power handling and different thermal profile; unsuitable for >225 mW continuous dissipation | Use MMBZ5235B only in space-constrained, low-power designs where 1N4736AP/TR12's 1 W rating is unnecessary |
Compared with 1N4736A (bulk) and MMBZ5235B (SOT-23), the 1N4736AP/TR12 uniquely combines 1 W power capability, DO-41 mechanical robustness, and EIA-296 tape-and-reel compatibility-making it optimal for industrial power supplies requiring reliable, automatable, through-hole Zener regulation.
Availability
1N4736AP/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and low-power voltage reference designs requiring stable component supply and long-term lifecycle support.
Supply support for 1N4736AP/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standard, high-stability Zener regulation in ruggedized plastic packages for mission-critical power control and reference applications.
FAQ
What is the Zener voltage tolerance of the 1N4736AP/TR12?
The 1N4736AP/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "A" suffix in the part number. This means its nominal 6.8 V breakdown voltage falls within 6.46 V to 7.14 V at 37 mA test current and 25 °C lead temperature. The tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range of −65 °C to +150 °C.
Does the 1N4736AP/TR12 support automated assembly?
Yes, the 1N4736AP/TR12 is supplied in EIA-296 standard tape-and-reel format (TR12 designation), enabling compatibility with high-speed pick-and-place equipment. Its DO-41 axial-leaded form factor is supported by industry-standard feeders, and the matte-tin RoHS-compliant plating ensures reliable solder wetting during reflow or wave soldering processes.
What is the maximum steady-state power dissipation for the 1N4736AP/TR12?
At 25 °C ambient, the 1N4736AP/TR12 is rated for 1.0 W steady-state power dissipation. Derating begins linearly above 25 °C, reaching zero dissipation at 150 °C case temperature. When mounted on FR4 with 4 mm² copper pads, its thermal resistance is 105 °C/W junction-to-ambient, limiting usable power to ~0.48 W at 100 °C ambient.
How does the 1N4736AP/TR12 differ from glass-body 1N4736A variants?
The 1N4736AP/TR12 uses a void-free thermosetting epoxy body (DO-41 plastic), delivering lower thermal resistance (45 °C/W junction-to-lead) versus glass-body versions (typically >60 °C/W). It also eliminates moisture sensitivity concerns (MSL Level 1), whereas glass variants may require dry-pack handling. Both share identical electrical specs, but the plastic version offers superior manufacturability and reliability in humid environments.
Can the 1N4736AP/TR12 be used in automotive applications?
Yes, the 1N4736AP/TR12 is qualified for operation from −65 °C to +150 °C and meets MIL-STD-750 ESD requirements (Method 1020), making it suitable for under-hood and infotainment power regulation. While not AEC-Q200 certified out-of-box, Microsemi offers screened versions (e.g., JANTXV-1N4736AP) with extended testing for automotive-grade reliability-contact Aetrix for qualified variants.
1N4736AP/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):
- 6.8 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)
1N4736AP/TR12 FAQ
1.How can I place an order for 1N4736AP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736AP/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 1N4736AP/TR12 reliable?
The price and inventory of 1N4736AP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736AP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4736AP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736AP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736AP/TR12?
1N4736AP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736AP/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 1N4736AP/TR12?
For technical support, including 1N4736AP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736AP/TR12 requirements.
6.How does Aetrix verify that 1N4736AP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4736AP/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 1N4736AP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4736AP/TR12?
All 1N4736AP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736AP/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 1N4736AP/TR12 part is unused and in its original packaging.
Return procedure for 1N4736AP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736AP/TR12 Tags
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