My Inquiry
My Account
Microchip Technology 1N4736PE3/TR12
- Part No.:
- 1N4736PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736PE3/TR12.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,995
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4736PE3/TR12 from Microsemi is a 1.0 W, 6.8 V ±5% axial-lead Zener diode in DO-41 plastic package, rated for 37 mA test current, 3.5 Ω dynamic impedance at IZT, and 700 μA reverse leakage at 4 V. It regulates voltage across industrial power supplies, reference circuits, and overvoltage protection stages.
For engineers reviewing the 1N4736PE3/TR12 datasheet, 1N4736PE3/TR12 pinout, 1N4736PE3/TR12 application, or 1N4736PE3/TR12 equivalent, key selection factors include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (660 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This device operates in reverse breakdown to maintain stable 6.8 V regulation across 10 mA to 370 mA DC current range, with knee impedance of 133 Ω at 5 mA. Its 45 °C/W junction-to-lead thermal resistance enables reliable operation up to +150 °C ambient when mounted with 10 mm lead length from body.
The 1N4736PE3/TR12 exhibits a negative temperature coefficient near 6.8 V, typical for Zeners in this voltage range, and meets MIL-STD-750 Method 1020 for ESD insensitivity. Its DO-41 package supports axial through-hole mounting with cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% at 37 mA - defines nominal regulation point with tight production control |
| Power Dissipation | 1.0 W at 25 °C - sets maximum continuous DC power before thermal derating begins |
| Dynamic Impedance (ZZT) | 3.5 Ω at 37 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | 10 μA max at 4 V - ensures low standby power loss in shunt regulator configurations |
| Surge Current (ISM) | 660 mA peak - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal management via PCB copper and lead length |
| Operating Temperature | –65 °C to +150 °C - suitable for automotive under-hood and industrial control environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored 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 | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in shunt regulation; reverse-biased during regulation |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node; maintains regulated voltage relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4736A series | Ensures cross-manufacturer compatibility and standardized test conditions |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating, no lead exemption required |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly |
| 1.0 W power rating with 45 °C/W thermal resistance | Supports higher-power regulation than SMD equivalents without heatsinking |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.8 V bias point. Use Value: Maintains ±5% regulation across –65 °C to +150 °C, enabling stable loop performance in wide-temperature designs. | Use Scenario: Protecting microcontroller I/O pins from transient surges on 5 V or 6 V rails. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground. Use Value: 660 mA surge rating and 3.5 Ω dynamic impedance limit voltage overshoot to ≤7.5 V during 8/20 μs transients. |
| Industrial Sensor Excitation | Current Source Bias Network |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in process control systems. IC Role / Device Role / Timing Role: Low-drift voltage source for Wheatstone bridge biasing. Use Value: 10 μA reverse leakage at 4 V minimizes error contribution in high-impedance sensor interfaces. | Use Scenario: Setting bias current for transistor amplifiers or op-amp input stages. IC Role / Device Role / Timing Role: Fixed-voltage node establishing predictable emitter/base voltage drop. Use Value: 133 Ω knee impedance at 5 mA ensures stable current setting even at low operating currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A | No "e3" RoHS suffix; Sn/Pb plating; same electrical specs and DO-41 package | Not compliant with RoHS Directive 2011/65/EU; requires lead exemption documentation | Select when legacy Sn/Pb assembly is mandated and RoHS compliance is not required |
| MMSZ4685-TP | SOD-123 surface-mount package; 6.8 V ±5%; 500 mW rating; 30 Ω ZZT | Lower power and thermal capability; unsuitable for >500 mW continuous dissipation | Select for space-constrained PCBs where 1.0 W dissipation is not needed and reflow compatibility is prioritized |
Compared with 1N4736A and MMSZ4685-TP, the 1N4736PE3/TR12 delivers full 1.0 W power handling in RoHS-compliant form with superior thermal resistance-critical for high-reliability through-hole power regulation where SMT thermal limits or lead-free exemptions are non-negotiable.
Availability
1N4736PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, and overvoltage protection circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4736PE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4736PE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener family, engineered for robust voltage regulation in harsh-environment power systems where thermal stability, ESD immunity, and JEDEC-standard consistency are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4736PE3/TR12?
The 1N4736PE3/TR12 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, as confirmed by the "A" suffix in its base part number (1N4736A) and documented in Microsemi's REV C datasheet. This tolerance applies at 37 mA test current and 25 °C lead temperature. The "e3" suffix denotes RoHS compliance but does not alter voltage specification.
Does 1N4736PE3/TR12 require dry packing before PCB assembly?
No, the 1N4736PE3/TR12 is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and does not require dry packing or baking prior to assembly. This simplifies inventory handling and eliminates moisture-related defects during reflow or wave soldering processes.
What is the maximum steady-state power dissipation for 1N4736PE3/TR12?
The 1N4736PE3/TR12 is rated for 1.0 W steady-state power dissipation at 25 °C ambient or at lead temperature <105 °C with 10 mm lead length from body. Derating is required above 25 °C per the published curve in Figure 1 of the datasheet, reaching zero watt capability at approximately 150 °C ambient.
How is polarity marked on 1N4736PE3/TR12?
The cathode of the 1N4736PE3/TR12 is marked by a distinct color band on the DO-41 plastic body. During Zener regulation, the banded end must be held at a higher potential than the anode (unbanded end). Forward voltage is specified as ≤1.2 V at 200 mA, confirming standard silicon PN junction behavior.
Is 1N4736PE3/TR12 suitable for surge protection applications?
Yes, the 1N4736PE3/TR12 supports 660 mA peak surge current (ISM) under 1/120 second half-sine conditions, making it suitable for clamping short-duration transients in power rails and I/O lines. Its 3.5 Ω dynamic impedance at 37 mA ensures minimal voltage overshoot during clamping, though external series resistance must be selected to limit peak power within 1.0 W limits.
1N4736PE3/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:
- ±10%
- 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)
1N4736PE3/TR12 FAQ
1.How can I place an order for 1N4736PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736PE3/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 1N4736PE3/TR12 reliable?
The price and inventory of 1N4736PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4736PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736PE3/TR12?
1N4736PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736PE3/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 1N4736PE3/TR12?
For technical support, including 1N4736PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736PE3/TR12 requirements.
6.How does Aetrix verify that 1N4736PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4736PE3/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 1N4736PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4736PE3/TR12?
All 1N4736PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736PE3/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 1N4736PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4736PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736PE3/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
