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Microchip Technology 1N4736CP/TR8
- Part No.:
- 1N4736CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736CP/TR8.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,825
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Product details
Overview
1N4736CP/TR8 from Microsemi is a 1.0 W silicon Zener diode with nominal Zener voltage 6.8 V ±5%, 37 mA test current (IZT), 3.5 Ω dynamic impedance (ZZT), and maximum regulator current 660 mA at TA = 50°C. It operates in reverse-bias regulation mode for voltage reference and overvoltage protection in DC power rails.
For engineers reviewing the 1N4736CP/TR8 datasheet, 1N4736CP/TR8 pinout, 1N4736CP/TR8 application, or 1N4736CP/TR8 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 DO-41 axial-leaded package compatibility with manual and wave soldering.
Technical Context
This device functions as a precision shunt voltage regulator, maintaining stable output voltage across wide operating current (1–660 mA) and temperature (−65°C to +150°C) ranges. Its sharp breakdown knee (verified by ZZK = 133 Ω @ IZK = 4 mA) ensures low noise and predictable regulation onset.
The DO-41 plastic package provides moisture sensitivity Level 1 per J-STD-020B-no dry pack required-and achieves 45 °C/W thermal resistance at 3/8″ lead length, enabling reliable 1.0 W dissipation without forced cooling in standard PCB layouts.
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 - supports continuous operation in ambient up to 45°C on FR4 with 4 mm² copper pads |
| Dynamic Impedance | 3.5 Ω @ IZT - ensures minimal output voltage shift under load transients |
| Max Regulator Current | 660 mA at TA = 50°C - sets upper limit for safe shunt current in overvoltage clamp circuits |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using standard lead-length mounting without heatsinking |
| Reverse Leakage | 10 μA @ VR = 4 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current | 660 mA (½-sine, 1/120 s) - withstands short-duration transients without degradation |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded plastic molded case per JEDEC. Cathode indicated by band; operated with banded end positive in reverse-bias regulation mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node / ground return | Connected to circuit common; carries full regulator current during clamping |
| Cathode | Zener output / regulated voltage node | Provides stable 6.8 V reference when reverse-biased; marked with color band |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures cross-manufacturer interchangeability and standardized test conditions |
| RoHS-compliant "e3" termination | Matte-tin plating compatible with Pb-free reflow and legacy SnPb assembly processes |
| Moisture sensitivity Level 1 | No dry-pack or baking required before PCB assembly-reduces handling cost and risk |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-safe for handling without special grounding protocols |
| Plastic vs. glass thermal advantage | Lower thermal resistance than DO-35 glass-body equivalents-improves power handling reliability |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Providing stable 6.8 V reference for linear regulators or ADC bias networks in industrial power modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC offset for feedback loops and analog signal conditioning. Use Value: 6.8 V ±5% tolerance and 3.5 Ω dynamic impedance minimize drift across 1–100 mA load range. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes on 5 V or 6 V supply lines. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess energy to ground when input exceeds 6.8 V. Use Value: 660 mA surge rating and 1.0 W steady-state dissipation handle repetitive 100 ns–1 μs transients without failure. |
| DC Rail Stabilization | Current Source Bias Network |
Use Scenario: Stabilizing +6.8 V rail for op-amp biasing in sensor front-end amplifiers operating from unregulated 9 V batteries. IC Role / Device Role / Timing Role: Active voltage stabilizer maintaining constant potential despite battery discharge and load variation. Use Value: Low knee impedance (133 Ω @ 4 mA) ensures regulation initiates sharply, reducing dropout uncertainty. | Use Scenario: Setting fixed bias current for LED drivers or transistor amplifiers via constant-voltage drop across series resistor. IC Role / Device Role / Timing Role: Precision voltage source defining current magnitude through Ohm's Law (I = VZ/R). Use Value: Tight 5% VZ tolerance directly translates to ±5% current accuracy-critical for consistent LED brightness. |
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 "P" suffix → glass DO-35 package; higher thermal resistance (75 °C/W); no RoHS "e3" plating | Less suitable for high-reliability automated assembly; lower power derating on PCB | Select only if legacy glass-body compatibility or non-RoHS requirement exists |
| BZX55C6V8 | Same 6.8 V ±5%, but 500 mW rating; DO-35 package; different Zener impedance curve (10 Ω @ 5 mA) | Limited to lower-power bias/reference use; not rated for 660 mA surge | Choose for space-constrained designs where 1 W dissipation is unnecessary |
Compared with 1N4736A and BZX55C6V8, the 1N4736CP/TR8 delivers superior thermal performance (45 °C/W), guaranteed RoHS compliance, and higher surge robustness-making it optimal for industrial power rails requiring long-term stability and assembly flexibility.
Availability
1N4736CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom line-card voltage references requiring stable component supply and full traceability.
Supply support for 1N4736CP/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4736CP/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series-designed specifically for ruggedized, high-stability voltage regulation in harsh-environment power systems.
FAQ
What is the Zener voltage tolerance of the 1N4736CP/TR8?
The 1N4736CP/TR8 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC standards. This tolerance applies under specified test conditions: IZT = 37 mA and TL = 25°C ±8°C. The 1N4736CP/TR8 maintains this specification across its qualified operating temperature range of −65°C to +150°C.
Does the 1N4736CP/TR8 support lead-free assembly?
Yes, the 1N4736CP/TR8 features RoHS-compliant "e3" matte-tin plating, qualified for both Pb-free reflow (up to 260°C for 10 s) and traditional SnPb wave soldering. Its DO-41 package meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry-pack or baking is required prior to assembly.
What is the maximum continuous current the 1N4736CP/TR8 can regulate?
The 1N4736CP/TR8 supports a maximum regulator current (IZM) of 660 mA at TA = 50°C when mounted on an FR4 board with 4 mm² copper pads. At higher ambient temperatures, derating applies per Figure 1 in the datasheet; at TA = 45°C, full 1.0 W dissipation remains valid. The 1N4736CP/TR8 must be operated within these limits to ensure long-term reliability.
How does the thermal resistance of the 1N4736CP/TR8 compare to glass-body Zeners?
The 1N4736CP/TR8 exhibits 45 °C/W junction-to-lead thermal resistance at 3/8″ lead length-significantly lower than the ~75 °C/W typical of DO-35 glass-body equivalents like the 1N4736A. This improvement allows the 1N4736CP/TR8 to sustain full 1.0 W dissipation at higher ambient temperatures, enhancing thermal margin in compact power designs.
Is the 1N4736CP/TR8 suitable for overvoltage protection in 5 V digital systems?
Yes, the 1N4736CP/TR8 is commonly used as a shunt clamp for 5 V rail protection due to its 6.8 V Zener voltage-providing sufficient headroom above nominal supply while triggering reliably during transients. Its 660 mA surge rating and low dynamic impedance (3.5 Ω) ensure effective energy diversion without latch-up, making the 1N4736CP/TR8 appropriate for protecting microcontrollers and interface ICs.
1N4736CP/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:
- ±2%
- 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)
1N4736CP/TR8 FAQ
1.How can I place an order for 1N4736CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736CP/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 1N4736CP/TR8 reliable?
The price and inventory of 1N4736CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4736CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736CP/TR8?
1N4736CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736CP/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 1N4736CP/TR8?
For technical support, including 1N4736CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736CP/TR8 requirements.
6.How does Aetrix verify that 1N4736CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4736CP/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 1N4736CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4736CP/TR8?
All 1N4736CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736CP/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 1N4736CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4736CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736CP/TR8 Tags
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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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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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Diodes Incorporated
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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SMAZ12-13-F
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