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Microchip Technology 1N4740APE3/TR8
- Part No.:
- 1N4740APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740APE3/TR8.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,506
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Product details
Overview
1N4740APE3/TR8 from Microsemi is a 10 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 25 mA test current, 7 Ω dynamic impedance at IZT, and 91 mA maximum regulator current at TA = 50°C. It delivers stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4740APE3/TR8 datasheet, 1N4740APE3/TR8 pinout, 1N4740APE3/TR8 application, or 1N4740APE3/TR8 equivalent, key selection criteria include its 10 V nominal Zener voltage, 1 W steady-state dissipation at TL < 105°C, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR8), and JEDEC-registered 1N4740A family compliance.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 10 V reference across a wide current range (0.25–91 mA), with low dynamic impedance (7 Ω) ensuring minimal voltage variation under load transients. Its thermal resistance is 45 °C/W junction-to-lead (3/8″ lead length) and 105 °C/W junction-to-ambient on FR4 board.
The device features cathode band polarity marking, UL94V-0 void-free epoxy case, and is moisture-sensitive Level 1 per J-STD-020B-no dry pack required. It supports MIL-PRF-19500 screening with prefix additions but the 1N4740APE3/TR8 itself is commercial-grade, RoHS-compliant, and tape-and-reel packaged.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V ±5% at IZT = 25 mA - defines precise regulation point for reference design |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead) - sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 25 mA - determines output voltage stability under varying load current |
| Max Regulator Current (IZM) | 91 mA at TA = 50°C - establishes upper safe operating current limit in ambient conditions |
| Reverse Leakage (IR) | ≤10 μA at VR = 7.6 V - ensures low standby power loss below knee voltage |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate thermal modeling for PCB trace heatsinking |
| Operating Temperature | −65°C to +150°C - supports deployment in extended industrial and automotive under-hood environments |
Pinout & Package
Package: DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in shunt regulation |
| Cathode (banded end) | Zener breakdown terminal / voltage reference output | Connected to unregulated input; maintains 10 V relative to anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4740A series | Ensures cross-manufacturer compatibility and standardized electrical behavior |
| 1 W power rating with defined derating curve | Enables predictable thermal design on FR4 boards using 4 mm² copper pads |
| RoHS-compliant "e3" suffix | Meets global environmental compliance without performance trade-offs |
| Tape-and-reel "TR8" packaging | Supports automated SMT placement despite axial-lead form factor via carrier tape handling |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for assembly planning |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 10 V setpoint for control loop. Use Value: Maintains ±5% regulation across 0.25–91 mA load range, minimizing output drift under line/load transients. | Use Scenario: Protecting downstream IC inputs from transient voltage spikes exceeding 10 V. IC Role / Device Role / Timing Role: Passive clamping element diverting surge current above 10 V threshold. Use Value: Limits peak voltage to ≤10.7 V (VZ + IZK × ZZK) with 0.25 mA knee current, preventing latch-up. |
| Signal Level Translation | Current Source Bias |
Use Scenario: Generating fixed 10 V bias for op-amp input stages or ADC reference buffers. IC Role / Device Role / Timing Role: Precision DC voltage source independent of supply rail fluctuations. Use Value: Delivers stable 10 V with 7 Ω dynamic impedance, reducing noise coupling into sensitive analog nodes. | Use Scenario: Setting constant current through LED or sensor using resistor-Zener combination. IC Role / Device Role / Timing Role: Voltage-controlled current sink anchor point. Use Value: Enables 10 V–based current calculation (e.g., I = (VIN − 10 V)/R) with ±5% accuracy and low tempco. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A-T | Same 10 V, ±5%, DO-41, but non-RoHS tin-lead plating and bulk packaging | Not suitable for RoHS-compliant production; requires lead-free process validation | Select only for legacy repair or non-RoHS programs where Pb content is permitted |
| MMSZ4700T1G | Surface-mount SOD-123, 10 V, ±5%, 500 mW, 15 Ω ZZT, higher tempco | Lower power, smaller footprint, but reduced current capability and regulation precision | Choose for space-constrained PCBs where 500 mW dissipation suffices and reflow compatibility is required |
Compared with 1N4740APE3/TR8, the 1N4740A-T lacks RoHS compliance and tape-and-reel support, while MMSZ4700T1G trades power and impedance performance for miniaturization-making the 1N4740APE3/TR8 optimal for cost-sensitive, high-reliability through-hole regulation requiring full 1 W capability and JEDEC standardization.
Availability
1N4740APE3/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and signal level translation applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing readiness.
Supply support for 1N4740APE3/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 1N4740APE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series-designed specifically for robust, standardized, through-hole voltage regulation in industrial power systems where JEDEC compliance, thermal stability, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4740APE3/TR8?
The 1N4740APE3/TR8 has a nominal Zener voltage of 10 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC standards. This tolerance applies at 25°C lead temperature with 25 mA test current and is maintained across its full operating temperature range of −65°C to +150°C. The 1N4740APE3/TR8 does not offer tighter tolerances like ±1% or ±2%-those require "D" or "C" suffix variants.
Does the 1N4740APE3/TR8 support automated assembly?
Yes, the 1N4740APE3/TR8 supports automated assembly via its "TR8" tape-and-reel packaging compliant with EIA-296 standards. Though it is an axial-lead DO-41 device, the carrier tape enables pick-and-place handling in through-hole insertion equipment. Its RoHS-compliant matte-tin plating also ensures reliable solder wetting during wave or selective soldering processes.
What is the maximum continuous current the 1N4740APE3/TR8 can regulate?
The 1N4740APE3/TR8 can regulate up to 91 mA continuously at ambient temperature of 50°C, as specified in its maximum regulator current (IZM) rating. At higher ambient temperatures, derating applies per Figure 1 in the datasheet; for example, at 75°C ambient, usable IZM drops to approximately 60 mA. Exceeding IZM risks thermal runaway and permanent degradation of the 1N4740APE3/TR8.
How does the thermal resistance of the 1N4740APE3/TR8 affect PCB layout?
The 1N4740APE3/TR8 has a junction-to-lead thermal resistance of 45 °C/W (measured at 3/8″ lead length) and 105 °C/W junction-to-ambient on FR4 with 4 mm² copper pads. To maintain reliability, PCB traces connected to its leads should be widened and thermally relieved to minimize thermal impedance-especially critical when operating near 1 W dissipation. Layout must avoid enclosing the 1N4740APE3/TR8 in tight enclosures without airflow.
Is the 1N4740APE3/TR8 suitable for automotive applications?
The 1N4740APE3/TR8 is rated for −65°C to +150°C operating temperature and meets MIL-STD-750 ESD testing, making it technically capable of under-hood use. However, it is not AEC-Q200 qualified. For production automotive applications, Microsemi offers screened versions (e.g., JAN1N4740AP) with MQ/MX prefixes-but the 1N4740APE3/TR8 itself is commercial-grade and best suited for industrial and general-purpose designs.
1N4740APE3/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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7.6 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)
1N4740APE3/TR8 FAQ
1.How can I place an order for 1N4740APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740APE3/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 1N4740APE3/TR8 reliable?
The price and inventory of 1N4740APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4740APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740APE3/TR8?
1N4740APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740APE3/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 1N4740APE3/TR8?
For technical support, including 1N4740APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740APE3/TR8 requirements.
6.How does Aetrix verify that 1N4740APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4740APE3/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 1N4740APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4740APE3/TR8?
All 1N4740APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740APE3/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 1N4740APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4740APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740APE3/TR8 Tags
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