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Microchip Technology 1N4736CP/TR12
- Part No.:
- 1N4736CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736CP/TR12.pdf
- Description:
- DIODE ZENER 6.8V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,175
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Product details
Overview
1N4736CP/TR12 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal zener voltage 6.8 V ±5%, 37 mA test current (IZT), 3.5 Ω dynamic impedance (ZZT), and 700 μA maximum reverse leakage at 4 V (IR). It regulates voltage in power supply reference, overvoltage protection, and voltage-clamping circuits across -65°C to +150°C.
For engineers reviewing the 1N4736CP/TR12 datasheet, 1N4736CP/TR12 pinout, 1N4736CP/TR12 application, or 1N4736CP/TR12 equivalent, key selection criteria include zener 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 operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 6.8 V zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift in mid-voltage regulation applications.
The DO-41 plastic package provides moisture sensitivity level 1 per J-STD-020B, eliminating dry-pack requirements. Thermal performance is specified for 3/8" (10 mm) lead length from body (45°C/W) and FR4 board mounting (105°C/W), enabling accurate power derating in real-world layouts.
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 circuits |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous power handling with 3/8" lead length |
| Dynamic Impedance (ZZT) | 3.5 Ω at IZT = 37 mA - determines output voltage stability under load transients |
| Reverse Leakage (IR) | 700 μA max at VR = 4 V - impacts quiescent current in low-power clamp designs |
| Surge Current (ISM) | 660 mA peak (½-sine, 1/120 s) - defines transient overvoltage withstand capability |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design with known lead-length constraints |
| Operating Temperature | -65°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by color 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; reverse-biased during regulation |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node to enable reverse breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures cross-manufacturer interchangeability and standardized test conditions |
| 5% zener voltage tolerance (A suffix) | Guarantees regulation accuracy within ±0.34 V at 6.8 V for precision references |
| Plastic P-suffix construction | Delivers lower thermal resistance vs. glass-body (G-suffix) variants for improved power handling |
| RoHS-compliant "e3" option | Meets environmental compliance without sacrificing electrical or thermal performance |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly prep |
Applications
| Power Supply Reference | Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Provides fixed reference voltage for error amplifier comparison. Use Value: Maintains output regulation accuracy within ±5% despite input ripple and load variation due to low ZZT (3.5 Ω) and stable VZ. | Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in industrial sensors. IC Role / Device Role / Timing Role: Shunts excess voltage above 6.8 V to ground during transients. Use Value: Limits clamped voltage to ≤7.5 V (at 660 mA surge) while surviving repeated 1/120 s surges per JEDEC spec. |
| Overvoltage Protection | Signal Level Translation |
Use Scenario: Safeguarding DC bus monitoring circuits in motor drives against supply overvoltage events. IC Role / Device Role / Timing Role: Triggers crowbar or shutdown circuit when bus exceeds safe threshold. Use Value: Delivers predictable 6.8 V trigger point with <700 μA leakage below 4 V, minimizing false trips. | Use Scenario: Biasing logic-level shifters between 5 V and 3.3 V domains in mixed-voltage systems. IC Role / Device Role / Timing Role: Establishes stable intermediate bias point for MOSFET gate control. Use Value: Enables clean level translation with minimal forward drop (1.2 V max @ 200 mA) and no timing skew. |
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 TR12 tape-and-reel suffix; bulk or ammo pack only; identical electrical specs | Lacks automated placement support; suitable for hand-solder or low-volume prototyping | Select 1N4736CP/TR12 for SMT production lines requiring reel-fed feeders |
| MMBZ5235B-TP | Surface-mount SOT-23 package; 6.8 V ±5%; 200 mW rating; 10 Ω ZZT | Lower power and higher impedance limit use to low-current signal clamping only | Choose MMBZ5235B-TP only where board space is constrained and power <200 mW |
Compared with 1N4736A and MMBZ5235B-TP, the 1N4736CP/TR12 uniquely combines 1.0 W power handling, DO-41 mechanical robustness, and tape-and-reel packaging-making it optimal for high-reliability, medium-power axial-lead production.
Availability
1N4736CP/TR12 is available at Aetrix Electronics and suitable for power supply reference, voltage clamp, and overvoltage protection applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N4736CP/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 1N47xxAP series was designed for general-purpose voltage regulation in cost-sensitive, high-volume industrial power supplies and protection circuits where JEDEC-standardized performance and mechanical reliability are essential.
FAQ
What is the zener voltage tolerance of the 1N4736CP/TR12?
The 1N4736CP/TR12 has a nominal zener voltage of 6.8 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number. This means the actual measured VZ at 37 mA test current falls between 6.46 V and 7.14 V under standard test conditions (TL = 25°C ±8°C, 90 seconds after current application). The tolerance is guaranteed per JEDEC registration and applies to all units in the 1N4736CP/TR12 lot.
Does the 1N4736CP/TR12 require dry packing before PCB assembly?
No, the 1N4736CP/TR12 does not require dry packing. Its DO-41 plastic package is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has negligible moisture absorption and may be stored and processed indefinitely at ambient conditions without baking or humidity-controlled handling. This simplifies logistics and eliminates floor-life tracking for production lines.
What is the maximum surge current rating for the 1N4736CP/TR12?
The 1N4736CP/TR12 has a maximum non-repetitive surge current (ISM) rating of 660 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating reflects its ability to absorb short-duration overvoltage transients without degradation, making it suitable for clamping inductive spikes or ESD events in industrial control interfaces.
How does the thermal resistance of the 1N4736CP/TR12 affect PCB layout?
The 1N4736CP/TR12 has a junction-to-lead thermal resistance of 45°C/W when leads are trimmed to 3/8" (10 mm) from the body. For reliable 1.0 W operation, PCB layout must ensure adequate lead length and copper pour area to meet this thermal path. On FR4 with 1 oz Cu, junction-to-ambient resistance rises to 105°C/W-requiring derating to ~0.43 W at 45°C ambient per Figure 1 in the datasheet.
Is the 1N4736CP/TR12 RoHS compliant?
Yes, the 1N4736CP/TR12 is RoHS compliant. The "e3" designation in Microsemi's official part numbering system confirms annealed matte-tin plating that meets EU RoHS Directive 2011/65/EU requirements. This applies to both the terminal finish and internal construction, with full compliance documentation available through Microchip's product change notifications and material declarations.
1N4736CP/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N4736CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736CP/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 1N4736CP/TR12 reliable?
The price and inventory of 1N4736CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4736CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736CP/TR12?
1N4736CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736CP/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 1N4736CP/TR12?
For technical support, including 1N4736CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736CP/TR12 requirements.
6.How does Aetrix verify that 1N4736CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4736CP/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 1N4736CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4736CP/TR12?
All 1N4736CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736CP/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 1N4736CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4736CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4736CP/TR12 Tags
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Diodes Incorporated
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