My Inquiry
My Account
Microchip Technology 1N4736E3/TR13
- Part No.:
- 1N4736E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736E3/TR13.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,906
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4736E3/TR13 from Microsemi is a 6.8 V, ±5% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 37 mA test current (IZT), 3.5 Ω dynamic impedance (ZZT), and 700 μA reverse leakage at 4 V (IR). It regulates voltage in power supply reference and overvoltage protection circuits across -65°C to +150°C.
For engineers reviewing the 1N4736E3/TR13 datasheet, 1N4736E3/TR13 pinout, 1N4736E3/TR13 application, or 1N4736E3/TR13 equivalent, key selection factors include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (660 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR13).
Technical Context
This device operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 6.8 V nominal Zener voltage exhibits a positive temperature coefficient above ~5 V, with typical TC of +2.5 mV/°C per Figure 3 in the datasheet.
The DO-41 package enables axial-leaded through-hole mounting with 0.7 g mass and UL94V-0 epoxy body. Thermal performance is specified at 3/8" (10 mm) lead length from body (45°C/W) or on FR4 board (105°C/W), supporting reliable operation in compact industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 6.8 V ±5% at 37 mA - defines precise regulation point for feedback loops and reference generation |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous operation in ambient up to 45°C on standard FR4 PCB |
| Dynamic Impedance | 3.5 Ω at IZT - ensures low output impedance for stable regulation under dynamic load changes |
| Reverse Leakage | 700 μA max at 4 V - confirms minimal quiescent current in standby or undervoltage detection |
| Surge Current (ISM) | 660 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
| Operating Temp | -65°C to +150°C - qualified for automotive under-hood, industrial control, and aerospace environments |
| Thermal Resistance | 45°C/W junction-to-lead - enables direct thermal path to PCB copper or heatsink via leads |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; banded end must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias; reference node in reverse-bias regulation | Connected to system ground or lower-potential rail during Zener operation |
| Cathode | Current source in reverse breakdown; regulated output node | Banded terminal connected to voltage rail requiring stabilization or clamping |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU Directive 2011/65/EU and J-STD-020B Level 1 moisture sensitivity |
| Tape-and-reel packaging | TR13 designation indicates EIA-296–compliant reel for automated SMT-compatible through-hole placement |
| Low thermal resistance | 45°C/W junction-to-lead enables higher power density vs. glass-body (G-suffix) variants |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - no special handling required in assembly |
| Stable Zener knee | Specified ZZK = 133 Ω at IZK = 1.0 mA - ensures predictable turn-on behavior in precision references |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in DC Power Supplies |
|---|---|
Use Scenario: Providing stable 6.8 V reference to instrumentation amplifier input stages in data acquisition systems. IC Role / Device Role / Timing Role: Precision shunt reference establishing known bias point for analog signal conditioning. Use Value: 6.8 V ±5% tolerance and 3.5 Ω dynamic impedance minimize drift and noise injection into sensitive analog paths. | Use Scenario: Clamping 12 V rail against transients caused by relay switching or motor commutation. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when rail exceeds 6.8 V + margin. Use Value: 660 mA surge current rating and 1 W steady-state dissipation absorb repetitive spikes without failure. |
| Microcontroller Reset Circuit | Fieldbus Interface Protection (RS-485) |
Use Scenario: Generating clean reset signal for MCU startup by holding reset line high until regulated 6.8 V is established. IC Role / Device Role / Timing Role: Zener-based threshold detector enabling power-on reset assertion timing. Use Value: -65°C to +150°C operating range ensures reliability in unregulated industrial enclosures. | Use Scenario: Protecting RS-485 transceiver inputs from ESD and cable-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting common-mode voltage excursions. Use Value: 700 μA reverse leakage at 4 V prevents false triggering while maintaining fast response to >6.8 V transients. |
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 terminations; same Vz, IZT, ZZT, and package | Not suitable for RoHS-compliant production; requires leaded solder process | Select only for legacy repair or non-RoHS programs |
| BZX55C6V8 | Same 6.8 V ±5%, but 500 mW rating, 10 Ω ZZT, and DO-35 package | Limited to lower-power references; incompatible footprint due to smaller DO-35 body | Choose only when board space is constrained and power < 0.5 W suffices |
Compared with 1N4736A and BZX55C6V8, the 1N4736E3/TR13 delivers full 1 W capability in RoHS-compliant form with superior thermal resistance and tighter impedance-making it optimal for industrial-grade power rail stabilization where reliability and compliance are mandatory.
Availability
1N4736E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable logic controller (PLC) I/O conditioning requiring stable component supply and long-term lifecycle support.
Supply support for 1N4736E3/TR13 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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N47xx series was designed specifically for general-purpose voltage regulation in cost-sensitive yet thermally demanding applications, balancing precision, ruggedness, and manufacturability in axial-leaded packages.
FAQ
What is the Zener voltage tolerance of the 1N4736E3/TR13?
The 1N4736E3/TR13 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 and does not affect voltage specification.
Does the 1N4736E3/TR13 require dry-pack moisture protection before PCB assembly?
No, the 1N4736E3/TR13 is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30°C/60% RH without baking or dry packing. This is enabled by its void-free UL94V-0 epoxy encapsulation and is explicitly stated in the "Features" section of the Microsemi datasheet.
What is the maximum surge current rating for the 1N4736E3/TR13?
The 1N4736E3/TR13 is rated for a maximum non-repetitive surge current (ISM) of 660 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This value is specified in the Electrical Characteristics table and supports transient suppression in power supply input stages and interface protection circuits.
Can the 1N4736E3/TR13 be used in surface-mount designs?
No, the 1N4736E3/TR13 uses a DO-41 axial-leaded package intended for through-hole mounting. Microsemi offers surface-mount equivalents such as SMAJ4736A and MLL4736A, but those are distinct part numbers with different packages, thermal profiles, and mechanical footprints-not drop-in replacements for the 1N4736E3/TR13.
What is the forward voltage drop of the 1N4736E3/TR13 at 200 mA?
The forward voltage (VF) of the 1N4736E3/TR13 is specified as a maximum of 1.2 V at 200 mA forward current, per the "Maximum Ratings" table in the Microsemi datasheet. This parameter is relevant for polarity protection or reverse-battery safeguard configurations where the device conducts in forward bias.
1N4736E3/TR13 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)
1N4736E3/TR13 FAQ
1.How can I place an order for 1N4736E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736E3/TR13 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 1N4736E3/TR13 reliable?
The price and inventory of 1N4736E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4736E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736E3/TR13?
1N4736E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736E3/TR13 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 1N4736E3/TR13?
For technical support, including 1N4736E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736E3/TR13 requirements.
6.How does Aetrix verify that 1N4736E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4736E3/TR13 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 1N4736E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4736E3/TR13?
All 1N4736E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736E3/TR13, 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 1N4736E3/TR13 part is unused and in its original packaging.
Return procedure for 1N4736E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736E3/TR13 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…
