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Microchip Technology 1N4734CP/TR12
- Part No.:
- 1N4734CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734CP/TR12.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,497
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Product details
Overview
1N4734CP/TR12 from Microsemi is a 5.6 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 45 °C/W junction-to-lead thermal resistance and 162 mA maximum regulator current at 50 °C, used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N4734CP/TR12 datasheet, 1N4734CP/TR12 pinout, 1N4734CP/TR12 application, or 1N4734CP/TR12 equivalent, key selection factors include its 5.6 V nominal Zener voltage, 45 mA test current, 5 Ω dynamic impedance at IZT, 10 µA reverse leakage at 4.2 V, and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates in reverse breakdown to maintain stable output voltage across varying load and line conditions. It exhibits a sharp knee at 45 mA test current with 5 Ω dynamic impedance, enabling low-noise regulation in analog circuits and feedback networks.
Its thermal resistance of 45 °C/W (junction-to-lead, 10 mm lead length) and 105 °C/W (junction-to-ambient on FR4) defines safe continuous power handling up to 1 W at TL < 105 °C or TA < 45 °C, supporting reliable operation in industrial temperature ranges (–65 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V ±5% at 45 mA - sets precise reference point for feedback regulation |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation without forced cooling |
| Dynamic Impedance (ZZT) | 5 Ω @ 45 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | 10 µA @ 4.2 V - guarantees low standby power loss in high-impedance bias networks |
| Maximum Regulator Current | 162 mA at TA = 50 °C - defines upper current limit before thermal derating applies |
| Forward Voltage | 1.2 V max @ 200 mA - enables use as clamping diode in bidirectional protection schemes |
| Thermal Resistance | 45 °C/W junction-to-lead - allows direct thermal path to PCB copper for passive heat sinking |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by 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 | Reference ground node in Zener configuration | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node in Zener configuration | Banded end; held at stable 5.6 V above anode when reverse current ≥ 45 mA |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxA series | Industry-standard footprint and electrical behavior for drop-in replacement across suppliers |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT reflow prep and reduces handling overhead |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly |
| RoHS Compliant option | e3 suffix indicates lead-free termination - meets global environmental compliance requirements |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body G-suffix variants - improves power handling in compact layouts |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold at secondary-side controller. Use Value: 5.6 V nominal voltage matches TL431 reference input range while providing tighter tolerance than generic 5.1 V Zeners. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes on sensor interface lines. IC Role / Device Role / Timing Role: Bidirectional clamping diode shunting excess energy to ground or rail during ESD events. Use Value: 1.2 V forward voltage enables low-threshold clamping; 10 µA leakage preserves signal integrity in high-impedance sensing paths. |
| Linear Regulator Reference | Industrial Sensor Excitation |
Use Scenario: Providing stable bias voltage for op-amp-based current sources in 4–20 mA transmitter designs. IC Role / Device Role / Timing Role: Precision voltage reference establishing fixed current setpoint independent of supply variation. Use Value: 5 Ω dynamic impedance minimizes current drift under load changes; 5.6 V value avoids saturation in rail-to-rail op-amps powered from 12 V rails. | Use Scenario: Supplying excitation voltage to resistive temperature detectors (RTDs) in process control systems. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source powering bridge circuits with millivolt-level outputs. Use Value: –65 °C to +150 °C operating range ensures stability across ambient extremes; 1 W rating supports sustained 10 mA excitation without thermal runaway. |
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 TR12 tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel delivery for automated placement | Select 1N4734CP/TR12 for SMT line integration; choose 1N4734A for manual prototyping or low-volume hand assembly |
| BZX55C5V6 | Same 5.6 V/5% spec but TO-92 package; 500 mW rating; 10 Ω ZZT | Lower power handling and higher dynamic impedance limit use in high-current or low-noise apps | Use BZX55C5V6 where board space is constrained and dissipation remains below 500 mW; retain 1N4734CP/TR12 for 1 W reliability and 5 Ω regulation fidelity |
Compared with 1N4734A and BZX55C5V6, the 1N4734CP/TR12 delivers superior thermal performance (45 °C/W), tighter regulation (5 Ω vs. 10 Ω), and factory-verified tape-and-reel readiness-making it optimal for production-grade power management where long-term stability and assembly scalability matter.
Availability
1N4734CP/TR12 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, linear regulator references, and industrial sensor excitation requiring stable component supply and JEDEC-standard Zener behavior.
Supply support for 1N4734CP/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 specifically for robust, cost-effective voltage regulation in harsh-environment power systems where JEDEC-standard form factor and proven thermal performance are critical.
FAQ
What is the Zener voltage tolerance of the 1N4734CP/TR12?
The 1N4734CP/TR12 has a nominal Zener voltage of 5.6 V with a ±5% tolerance, as indicated by the "A" suffix in the part number per JEDEC standard. This means the actual measured VZ falls between 5.32 V and 5.88 V when tested at 45 mA and 25 °C lead temperature. The "P" denotes plastic DO-41 packaging, and "TR12" specifies EIA-296-compliant tape-and-reel packaging for automated assembly.
Does the 1N4734CP/TR12 require dry packing before reflow soldering?
No, the 1N4734CP/TR12 is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without baking or dry packing prior to reflow. Its void-free epoxy body and qualified plating ensure robustness during standard 260 °C/10 s solder profiles, eliminating moisture-related popcorning risk.
What is the maximum reverse current specification for the 1N4734CP/TR12?
The 1N4734CP/TR12 has a maximum reverse leakage current of 10 µA at 4.2 V (75% of nominal VZ). This value is specified in the Electrical Characteristics table and reflects stable, low-power behavior in high-impedance bias networks-critical for precision references where leakage-induced offset must remain negligible.
Can the 1N4734CP/TR12 be used in surface-mount designs?
No-the 1N4734CP/TR12 uses a DO-41 axial-lead package intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4734A and MLL4734A in DO-214AC and SOD-123 packages respectively; these share identical electrical specs but differ mechanically and thermally. The 1N4734CP/TR12 itself is not compatible with SMT reflow without adapter hardware.
How does thermal resistance affect the 1N4734CP/TR12's power handling capability?
The 1N4734CP/TR12 has a junction-to-lead thermal resistance of 45 °C/W, meaning each watt of dissipated power raises the junction temperature 45 °C above lead temperature. At 105 °C lead temperature, full 1 W operation is allowed; above that, linear derating applies. This parameter directly determines heatsinking requirements and safe operating area in continuous-duty applications.
1N4734CP/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):
- 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/TR12 FAQ
1.How can I place an order for 1N4734CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734CP/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 1N4734CP/TR12 reliable?
The price and inventory of 1N4734CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4734CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734CP/TR12?
1N4734CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734CP/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 1N4734CP/TR12?
For technical support, including 1N4734CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734CP/TR12 requirements.
6.How does Aetrix verify that 1N4734CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4734CP/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 1N4734CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4734CP/TR12?
All 1N4734CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734CP/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 1N4734CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4734CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734CP/TR12 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
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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