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Microchip Technology 1N4734APE3/TR12
- Part No.:
- 1N4734APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734APE3/TR12.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,518
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Product details
Overview
1N4734APE3/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 Zener current at 50 °C ambient, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4734APE3/TR12 datasheet, 1N4734APE3/TR12 pinout, 1N4734APE3/TR12 application, or 1N4734APE3/TR12 equivalent, key selection considerations include its 5.6 V nominal Zener voltage, 45 mA test current, 5 Ω dynamic impedance at IZT, -65 °C to +150 °C operating temperature range, and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable output voltage across varying load and line conditions. Its 5.6 V Zener voltage falls in the low-voltage region where temperature coefficient is near zero (≈0 mV/°C), minimizing drift over temperature.
It delivers regulated voltage with 5 Ω dynamic impedance at 45 mA test current and supports up to 162 mA DC Zener current at 50 °C lead temperature, with surge capability of 810 mA per half-sine pulse (1/120 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V ±5% at 45 mA - defines precise regulation point for feedback references |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous power handling on PCB leads |
| Dynamic Impedance (ZZT) | 5 Ω at 45 mA - ensures minimal output voltage variation under load transients |
| Test Current (IZT) | 45 mA - standard bias point for specifying VZ and ZZT |
| Max Regulator Current (IZM) | 162 mA at TA = 50 °C - determines usable current headroom before thermal derating |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink |
| Operating Temperature | -65 °C to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; terminals are anode and cathode - no internal circuitry, bidirectional mounting prohibited for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse bias applied across anode–cathode for regulation |
| Cathode | Zener breakdown terminal / regulation output | Banded end; held at stable 5.6 V above anode when reverse biased ≥5.6 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N4734A registration | Guarantees mechanical and electrical interchangeability with legacy 1N4734A designs |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU without lead or exemptions |
| Moisture sensitivity Level 1 | No dry-pack or baking required before PCB assembly per IPC/JEDEC J-STD-020B |
| Low thermal resistance (45 °C/W) | Enables higher power operation with standard 3/8″ (10 mm) lead length from body |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or op-amp-based shunt regulators. IC Role / Device Role / Timing Role: Provides fixed 5.6 V reference node for error amplifier comparison. Use Value: Maintains ±5% regulation accuracy over 1–162 mA current range and -65 °C to +150 °C temperature span. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 5.6 V. IC Role / Device Role / Timing Role: Shunts excess current to ground when input exceeds 5.6 V + forward drop. Use Value: Limits clamping voltage to ≤6.2 V at 100 mA surge, preventing latch-up or damage. |
| Voltage Monitor Threshold | Current Source Bias |
Use Scenario: Setting trip point for battery undervoltage detection circuits using comparator inputs. IC Role / Device Role / Timing Role: Supplies stable 5.6 V reference to comparator non-inverting input. Use Value: Enables accurate 5.6 V threshold detection with <±0.3 V drift over full temperature range. | Use Scenario: Generating constant-current bias for LED drivers or transistor amplifiers. IC Role / Device Role / Timing Role: Forms Zener-based current source with series resistor. Use Value: Delivers stable 45 mA bias current with <5% variation across 10–100 mA load changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A (Microsemi) | No "e3" RoHS suffix; Sn/Pb terminations; same VZ, ZZT, and package | Not compliant with RoHS; requires exemption documentation for EU shipments | Select only if legacy Sn/Pb assembly process is mandated |
| MMBZ5232BS (ON Semiconductor) | SOT-23 surface-mount package; 5.6 V ±5%; 225 mW rating; 17 Ω ZZT | Lower power and higher impedance limit use to low-current signal-level regulation | Choose for space-constrained PCBs where 1 W dissipation is unnecessary |
Compared with 1N4734A and MMBZ5232BS, the 1N4734APE3/TR12 offers full 1 W power handling in RoHS-compliant axial form, making it optimal for through-hole power reference and clamp roles where thermal mass and lead heat sinking are leveraged.
Availability
1N4734APE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, voltage monitor threshold, and current source bias applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N4734APE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized plastic packages for mission-critical power conditioning and protection functions.
FAQ
What is the Zener voltage tolerance of the 1N4734APE3/TR12?
The 1N4734APE3/TR12 has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, as confirmed by the "A" suffix in the part number per Microsemi's datasheet revision C. This tolerance applies at 45 mA test current and 25 °C lead temperature, and remains valid across the full -65 °C to +150 °C operating range. The 1N4734APE3/TR12 does not offer tighter tolerances like ±1% or ±2%-those require "D" or "C" suffix variants.
Does the 1N4734APE3/TR12 support automated tape-and-reel placement?
Yes, the 1N4734APE3/TR12 is supplied in EIA-296 standard tape-and-reel format, indicated by the "TR12" suffix. It is compatible with standard axial-leaded component feeders and supports high-volume SMT-style assembly processes. The reel contains 12,000 units per standard pack, and the device's RoHS-compliant matte-tin plating ensures reliable solderability after storage.
What is the maximum steady-state current the 1N4734APE3/TR12 can regulate continuously?
The 1N4734APE3/TR12 supports a maximum steady-state Zener current (IZM) of 162 mA at 50 °C ambient temperature when mounted on FR4 with specified copper pads. At 25 °C lead temperature, its 1.0 W power rating allows ~179 mA (1.0 W ÷ 5.6 V), but thermal derating reduces usable current as temperature rises. Continuous operation above 162 mA risks exceeding junction temperature limits.
How does the thermal resistance of the 1N4734APE3/TR12 affect PCB layout?
The 1N4734APE3/TR12 has a junction-to-lead thermal resistance of 45 °C/W, meaning each watt dissipated raises junction temperature 45 °C above lead temperature. To maintain reliability, leads must be kept below 105 °C - achieved by using ≥10 mm lead length from body and avoiding excessive copper pour that traps heat. Layout must avoid routing high-current traces adjacent to leads to prevent local heating.
Is the 1N4734APE3/TR12 suitable for surge protection applications?
The 1N4734APE3/TR12 supports a peak reverse surge current (ISM) of 810 mA for 1/120 second (8.3 ms) half-sine pulses at 25 °C, per Microsemi's datasheet. While usable for moderate transients, it is not optimized for high-energy surges like those from lightning or EFT - dedicated TVS diodes with faster response and higher IPP ratings are preferred for such roles. Use 1N4734APE3/TR12 only for low-energy clamping within its 1 W average power limit.
1N4734APE3/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:
- ±5%
- 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)
1N4734APE3/TR12 FAQ
1.How can I place an order for 1N4734APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734APE3/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 1N4734APE3/TR12 reliable?
The price and inventory of 1N4734APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4734APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734APE3/TR12?
1N4734APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734APE3/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 1N4734APE3/TR12?
For technical support, including 1N4734APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734APE3/TR12 requirements.
6.How does Aetrix verify that 1N4734APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4734APE3/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 1N4734APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4734APE3/TR12?
All 1N4734APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734APE3/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 1N4734APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4734APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734APE3/TR12 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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