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Microchip Technology 1N4734CP/TR8
- Part No.:
- 1N4734CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734CP/TR8.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,631
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Product details
Overview
1N4734CP/TR8 from Microsemi is a 5.6 V, 1 W silicon Zener diode in DO-41 plastic package with ±5% voltage tolerance, 45 Ω dynamic impedance at 45 mA test current, and -65°C to +150°C operating temperature range, used for precision voltage regulation in power supply reference circuits.
For engineers reviewing the 1N4734CP/TR8 datasheet, 1N4734CP/TR8 pinout, 1N4734CP/TR8 application, or 1N4734CP/TR8 equivalent, key selection factors include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (810 mA), reverse leakage (<10 µA at 4.2 V), and RoHS-compliant "e3" plating with tape-and-reel packaging (TR8).
Technical Context
The 1N4734CP/TR8 operates as a reverse-biased voltage reference diode with sharp breakdown knee at 5.6 V nominal, specified at 45 mA test current (IZT) and validated per JEDEC 1N4734A standards. Its Zener impedance of 5 Ω is measured at IZT with 10% AC superimposition, ensuring stable regulation under varying load conditions.
Designed for axial-lead mounting on FR4 PCBs, it delivers 1.0 W steady-state power dissipation at lead temperature <105°C (3/8" from body) or ambient <45°C, with thermal resistance of 105 °C/W junction-to-ambient under defined copper pad conditions (4 mm², 1 mm trace width).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 5.6 V ±5%, measured at 45 mA and 25°C lead temperature - defines precise regulation point for feedback loops. |
| Power Dissipation | 1.0 W at TL < 105°C (3/8" from body) - sets maximum continuous DC power handling in lead-mounted configuration. |
| Dynamic Impedance (ZZT) | 5 Ω at IZT = 45 mA - ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | <10 µA at VR = 4.2 V - guarantees low quiescent current in standby or high-impedance bias networks. |
| Surge Current (ISM) | 810 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without degradation. |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8" lead length) - enables accurate junction temperature estimation for reliability analysis. |
| Operating Temperature | -65°C to +150°C - qualifies for industrial, automotive under-hood, and aerospace environments. |
Pinout & Package
DO-41 (DO-204AL) plastic molded package with axial leads; cathode indicated by band; polarity critical for Zener operation (banded end positive during regulation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation; requires current-limiting resistor. |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated voltage rail; supplies stable 5.6 V reference when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with 1N4734A standard for interchangeability and test methodology across manufacturers. |
| Plastic encapsulation (P suffix) | Lower thermal resistance vs. glass-body variants - improves power handling in compact layouts. |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage logistics. |
| RoHS-compliant "e3" plating | Matte-tin termination meets lead-free soldering requirements (260°C/10 s) without Sn/Pb. |
| Tape-and-reel packaging (TR8) | EIA-296 compliant reel format - enables automated pick-and-place assembly for high-volume production. |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Provides precise 5.6 V reference to error amplifier input, enabling ±1% output regulation accuracy. Use Value: Maintains regulation despite input ripple and load variation due to low 5 Ω dynamic impedance and sharp knee characteristic. | Use Scenario: Clamping transient spikes on 5 V logic rails or sensor supply lines. IC Role / Device Role / Timing Role: Acts as shunt protector by conducting above 5.6 V, diverting surge current away from sensitive downstream circuitry. Use Value: Withstands 810 mA surge pulses without parameter shift, preserving system integrity during ESD or inductive switching events. |
| Voltage Monitor Threshold | Current Source Biasing |
Use Scenario: Setting trip point for brown-out detection or battery low-voltage warning circuits. IC Role / Device Role / Timing Role: Supplies stable reference to comparator input, triggering reset when supply drops below 5.6 V × (R1+R2)/R2. Use Value: ±5% tolerance and low temperature coefficient ensure consistent threshold across -40°C to +85°C operating range. | Use Scenario: Establishing constant-current bias for LED drivers or op-amp input stages. IC Role / Device Role / Timing Role: Forms two-terminal current source with series resistor, delivering ~1 mA through load independent of supply variation. Use Value: Low 10 µA leakage at 4.2 V minimizes error in low-current bias networks, improving accuracy of analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | No "P" (plastic) or "TR8" suffix; glass-body option available; same electrical specs but higher thermal resistance. | Limited to manual or wave-solder assembly; not optimized for automated placement or moisture-sensitive environments. | Select 1N4734CP/TR8 for RoHS compliance, tape-and-reel automation, and improved thermal performance in DO-41 plastic. |
| MMSZ5232B-TP | Surface-mount SOD-123 package; 5.6 V ±5%; 500 mW rating; 17 Ω impedance at 20 mA. | Lower power and smaller footprint; unsuitable for >500 mW continuous dissipation or high-surge scenarios. | Choose MMSZ5232B-TP only when board space is constrained and peak power remains below 0.5 W. |
Compared with 1N4734A and MMSZ5232B-TP, the 1N4734CP/TR8 offers superior thermal management (45 °C/W vs. ~120 °C/W for glass-body 1N4734A), full 1 W capability, and factory-verified tape-and-reel readiness - making it optimal for industrial power supplies requiring long-term stability and automated manufacturing.
Availability
1N4734CP/TR8 is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, voltage monitor threshold setting, and current source biasing requiring stable component supply across extended temperature ranges and high-reliability production.
Supply support for 1N4734CP/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered specifically for robust, cost-effective voltage regulation in harsh-environment power systems - emphasizing JEDEC standardization, thermal resilience, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N4734CP/TR8?
The 1N4734CP/TR8 has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is verified at 45 mA test current and 25°C lead temperature, and applies across the full -65°C to +150°C operating range per Microsemi's published electrical characteristics table.
Does the 1N4734CP/TR8 support lead-free soldering processes?
Yes, the 1N4734CP/TR8 features RoHS-compliant "e3" matte-tin plating, qualified for lead-free reflow up to 260°C for 10 seconds per MIL-STD-750 Method 2026. Its DO-41 plastic package meets UL94V-0 flammability rating, ensuring compatibility with modern automated assembly lines.
What is the maximum surge current rating for the 1N4734CP/TR8?
The 1N4734CP/TR8 is rated for a maximum non-repetitive reverse surge current (ISM) of 810 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating enables reliable transient suppression in power rail protection applications without parameter drift.
How does the thermal resistance of the 1N4734CP/TR8 compare between junction-to-lead and junction-to-ambient?
The 1N4734CP/TR8 has a junction-to-lead thermal resistance of 45 °C/W (measured at 3/8" lead length), while junction-to-ambient is 105 °C/W when mounted on FR4 with specified 4 mm² copper pads. This difference highlights the importance of proper lead heatsinking to achieve full 1 W power dissipation capability.
Is the 1N4734CP/TR8 suitable for use in high-humidity environments?
Yes, the 1N4734CP/TR8 is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it requires no dry pack or baking prior to assembly. Its void-free epoxy encapsulation provides inherent resistance to humidity-induced degradation, supporting reliable operation in tropical or uncontrolled storage conditions.
1N4734CP/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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 2 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)
1N4734CP/TR8 FAQ
1.How can I place an order for 1N4734CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734CP/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 1N4734CP/TR8 reliable?
The price and inventory of 1N4734CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4734CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734CP/TR8?
1N4734CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734CP/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 1N4734CP/TR8?
For technical support, including 1N4734CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734CP/TR8 requirements.
6.How does Aetrix verify that 1N4734CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4734CP/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 1N4734CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4734CP/TR8?
All 1N4734CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734CP/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 1N4734CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4734CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734CP/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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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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