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Microchip Technology 1N4734CPE3/TR8
- Part No.:
- 1N4734CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734CPE3/TR8.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,410
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Product details
Overview
1N4734CPE3/TR8 from Microsemi is a 5.6 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 45 mA test current (IZT), 5 Ω dynamic impedance (ZZT), and 162 mA maximum regulator current (IZM) at 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4734CPE3/TR8 datasheet, 1N4734CPE3/TR8 pinout, 1N4734CPE3/TR8 application, or 1N4734CPE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45°C/W junction-to-lead), surge current rating (810 mA), reverse leakage (10 µA @ 4.5 V), and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse breakdown to maintain stable output voltage across wide current (0.25–162 mA) and temperature (–65°C to +150°C) ranges. Its 5.6 V nominal Zener voltage exhibits low temperature coefficient near zero crossing, minimizing drift in precision references.
The DO-41 package delivers 45°C/W junction-to-lead thermal resistance at 10 mm lead length, enabling reliable 1 W dissipation without forced cooling. Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 5.6 V ±2% - tight tolerance enables accurate voltage reference in feedback loops |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous regulation in compact linear supplies |
| Test Current (IZT) | 45 mA - defines operating point where Vz and ZZT are specified |
| Dynamic Impedance (ZZT) | 5 Ω @ IZT - low AC impedance ensures minimal output voltage variation under load transients |
| Max Regulator Current (IZM) | 162 mA at TA = 50°C - sets upper limit for sustained Zener conduction without thermal runaway |
| Reverse Leakage (IR) | 10 µA @ VR = 4.5 V - low leakage preserves efficiency in high-impedance bias networks |
| Thermal Resistance | 45°C/W junction-to-lead - allows direct thermal path to PCB copper or heatsink via leads |
Pinout & Package
DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by color band; terminals are unmarked anode and banded cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node / ground connection | Connected to lower-potential side of circuit; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; connected to higher-potential rail requiring stabilized voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables use in 1% accuracy feedback networks without trimming resistors |
| RoHS-compliant matte-tin plating | Supports lead-free reflow soldering per JEDEC J-STD-020B Level 1 moisture sensitivity |
| Low dynamic impedance (5 Ω) | Reduces output ripple in shunt-regulated LDO pre-bias or sensor excitation circuits |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for on-board ESD protection in industrial control input stages |
| 1.0 W power rating with derating curve | Permits full-rated operation up to 105°C lead temperature in chassis-mounted designs |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulators or op-amp-based adjustable supplies. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.6 V setpoint for error amplifier comparison. Use Value: ±2% tolerance and 5 Ω impedance ensure <±0.1 V output deviation across 10–100 mA load steps. | Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events exceeding 5.6 V. IC Role / Device Role / Timing Role: Crowbar element clamping input rail to safe level during ESD or inductive kickback. Use Value: 810 mA surge rating absorbs 100 ns/1 A transients without degradation per MIL-STD-750. |
| Temperature-Stable Bias Network | Current Source Reference |
Use Scenario: Generating bias currents for analog front-end amplifiers where drift must stay below 50 ppm/°C. IC Role / Device Role / Timing Role: Zener diode operating near zero TC point (5.6 V) to minimize thermal drift in resistor-divider bias. Use Value: Near-zero temperature coefficient reduces bias current drift to <±0.02% over –40°C to +85°C. | Use Scenario: Setting constant current for LED drivers or sensor excitation using constant-voltage drop across series resistor. IC Role / Device Role / Timing Role: Stable 5.6 V reference defining current magnitude via Ohm's Law (I = Vz/R). Use Value: 162 mA IZM supports ≥10 mA source capability with 10% headroom for long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Same 5.6 V nominal, but ±5% tolerance (A suffix vs C); otherwise identical electrical specs and DO-41 package | Acceptable where 5% regulation accuracy suffices, e.g., non-critical power rails | Select 1N4734CPE3/TR8 when ±2% tolerance is required for closed-loop stability or metrology-grade references |
| BZX55-C5V6 | 5.6 V ±5%, 500 mW rating, DO-35 glass package; higher thermal resistance (125°C/W junction-to-ambient) | Limited to lower-power applications; unsuitable for 1 W continuous dissipation | Choose 1N4734CPE3/TR8 for 1 W operation, DO-41 mechanical robustness, and tighter tolerance in industrial power designs |
Compared with 1N4734A and BZX55-C5V6, the 1N4734CPE3/TR8 offers superior voltage accuracy and thermal performance for high-reliability 1 W shunt regulation, while maintaining JEDEC-standard pin compatibility and RoHS compliance.
Availability
1N4734CPE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with traceable RoHS-compliant sourcing.
Supply support for 1N4734CPE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for precision voltage regulation in harsh-environment power systems where stability, surge immunity, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4734CPE3/TR8?
The 1N4734CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This tight tolerance ensures the actual breakdown voltage remains between 5.488 V and 5.712 V at 25°C with 45 mA test current, making it suitable for precision reference applications where standard ±5% devices would introduce unacceptable error.
Does the 1N4734CPE3/TR8 meet RoHS requirements?
Yes, the 1N4734CPE3/TR8 complies with RoHS directives, confirmed by the "e3" suffix indicating matte-tin plating and lead-free construction. It supports lead-free reflow soldering profiles up to 260°C for 10 seconds and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry-pack requirement.
What is the maximum continuous Zener current for the 1N4734CPE3/TR8 at 50°C ambient?
The maximum regulator current (IZM) for the 1N4734CPE3/TR8 is 162 mA at 50°C ambient temperature, as specified in the Electrical Characteristics table. This value assumes mounting on FR4 board with defined copper pad geometry; derating applies above 50°C per the published power derating curve.
How is polarity marked on the 1N4734CPE3/TR8 package?
The 1N4734CPE3/TR8 uses a cathode band marking on the DO-41 plastic body to indicate polarity. The banded end is the cathode and must be held at a higher potential than the unmarked anode end for proper Zener regulation. Reversing polarity subjects the device to forward conduction only, with 1.2 V max forward voltage at 200 mA.
Can the 1N4734CPE3/TR8 replace the 1N4734A in existing designs?
The 1N4734CPE3/TR8 can functionally replace the 1N4734A in most circuits due to identical package, pinout, and nominal voltage, but its ±2% tolerance improves regulation accuracy. No PCB changes are needed, though designers should verify that tighter tolerance does not cause unintended interaction in feedback loops calibrated for ±5% variation.
1N4734CPE3/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)
1N4734CPE3/TR8 FAQ
1.How can I place an order for 1N4734CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734CPE3/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 1N4734CPE3/TR8 reliable?
The price and inventory of 1N4734CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4734CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734CPE3/TR8 transactions.
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4.How is shipping managed for 1N4734CPE3/TR8?
1N4734CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734CPE3/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 1N4734CPE3/TR8?
For technical support, including 1N4734CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4734CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4734CPE3/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 1N4734CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4734CPE3/TR8?
All 1N4734CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734CPE3/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 1N4734CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4734CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734CPE3/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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