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Microchip Technology 1N4740PE3/TR8
- Part No.:
- 1N4740PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740PE3/TR8.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
1N4740PE3/TR8 from Microsemi is a 10 V, 5% tolerance, 1 W plastic-encapsulated Zener diode in DO-41 package, rated for 25 mA test current, 7 Ω dynamic impedance at IZT, and 0.25 A maximum regulator current at TA = 50°C. It provides stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4740PE3/TR8 datasheet, 1N4740PE3/TR8 pinout, 1N4740PE3/TR8 application, or 1N4740PE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (45°C/W junction-to-lead), RoHS-compliant matte-tin plating, tape-and-reel packaging (TR8), and moisture sensitivity level 1 compliance without dry pack requirement.
Technical Context
This device operates in reverse breakdown to maintain a stable 10 V reference across a wide current range (1–25 mA typical), with low dynamic impedance (7 Ω) ensuring minimal voltage variation under load transients. Its DO-41 axial-leaded plastic package delivers lower thermal resistance than glass-body variants, supporting reliable 1 W dissipation at lead temperature ≤105°C.
The 1N4740PE3/TR8 features a cathode band marking, forward voltage ≤1.2 V at 200 mA, and is rated for soldering at 260°C for 10 s. It meets MIL-STD-750 Method 1020 for ESD insensitivity and IPC/JEDEC J-STD-020B Level 1 moisture classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V ±5% at IZT = 25 mA - defines precise regulation point for reference and clamp circuits |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous thermal load on PCB layout |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 25 mA - determines output voltage stability under varying load current |
| Max Regulator Current (IZM) | 0.25 A at TA = 50°C - limits safe operating current in shunt regulation applications |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design using lead conduction path, not ambient convection |
| Operating Temperature | −65°C to +150°C - supports deployment in automotive under-hood and industrial control environments |
| Moisture Sensitivity | Level 1 per J-STD-020B - eliminates dry-pack requirement and floor-life constraints for SMT assembly |
Pinout & Package
Package: DO-41 (DO-204AL) - axial-leaded, void-free thermosetting epoxy case meeting UL94V-0, with tin-lead or RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to unregulated input to deliver stable 10 V to load |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per MIL-STD-750 Method 2026, eliminating lead-based solder compatibility concerns |
| Tape-and-reel packaging ("TR8") | EIA-296 compliant carrier tape for automated pick-and-place assembly of high-volume production boards |
| Plastic encapsulation (P suffix) | Lower thermal resistance (45°C/W) vs. glass-body variants, improving power handling in compact layouts |
| JEDEC 1N47xxA registration | Industry-standard footprint and electrical behavior, enabling drop-in replacement across multiple suppliers |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - reduces handling precautions and board-level ESD hardening needs |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or as precision reference in ADC bias networks. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 10 V node independent of input ripple or load variation. Use Value: Enables ±5% output accuracy in low-cost discrete regulators without requiring active compensation. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 12 V rail in automotive body control modules. IC Role / Device Role / Timing Role: Crowbar element that conducts above 10 V to divert surge energy to ground. Use Value: Limits peak clamped voltage to ≤10.5 V (at IZM), preventing latch-up in 5 V logic interfaces. |
| Bias Network Stabilizer | Temperature-Compensated Reference |
Use Scenario: Setting stable base-emitter voltage for transistor amplifiers in instrumentation front-ends. IC Role / Device Role / Timing Role: Provides fixed DC bias point with low dynamic impedance to reject supply noise coupling. Use Value: Reduces gain drift by maintaining constant VBE despite ±10% input rail variation. | Use Scenario: Paired with complementary Zener (e.g., 1N4733A) in temperature-stable reference strings for sensor signal conditioning. IC Role / Device Role / Timing Role: One leg of a matched Zener pair where 10 V device contributes known tempco (~+5 mV/°C). Use Value: Enables cancellation of thermal drift when combined with negative-tempco components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | No "e3" RoHS suffix; Sn/Pb plating; same VZ, IZT, ZZT, package | Not suitable for lead-free assembly; requires Pb-based solder process | Select when legacy Pb-process compatibility is required and RoHS exemption applies |
| MMBZ5240BS-7-F | SOT-23 surface-mount package; 10 V ±5%; 225 mW PD; 10 Ω ZZT | Lower power rating and different thermal path; unsuitable for 1 W continuous dissipation | Select only for space-constrained, low-power biasing where board area is critical and power < 200 mW |
Compared with 1N4740A and MMBZ5240BS-7-F, the 1N4740PE3/TR8 uniquely combines full 1 W dissipation capability, RoHS compliance, tape-and-reel automation support, and industry-standard DO-41 mechanical compatibility-making it optimal for high-reliability through-hole power regulation where thermal robustness and process compliance are jointly required.
Availability
1N4740PE3/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and bias network stabilization requiring stable component supply across automotive, industrial control, and test equipment programs.
Supply support for 1N4740PE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for cost-effective, high-stability voltage regulation in ruggedized power systems where JEDEC-standard form factor, thermal resilience, and long-term parametric consistency are essential.
FAQ
What is the Zener voltage tolerance of the 1N4740PE3/TR8?
The 1N4740PE3/TR8 has a nominal Zener voltage of 10 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is verified at 25°C lead temperature with 25 mA test current and ensures predictable regulation performance across production lots and operating conditions.
Does the 1N4740PE3/TR8 require dry packing before PCB assembly?
No, the 1N4740PE3/TR8 is moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture during standard factory handling to require dry pack or baking prior to reflow or wave soldering-reducing manufacturing overhead and floor-life tracking burden.
What is the maximum continuous power dissipation for the 1N4740PE3/TR8?
The 1N4740PE3/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) below 105°C with 3/8″ (10 mm) lead length from the body. Derating is required above this temperature, per Figure 1 in the Microsemi datasheet, to prevent thermal runaway or parametric shift.
Can the 1N4740PE3/TR8 be used in lead-free soldering processes?
Yes, the 1N4740PE3/TR8 carries the "e3" suffix confirming RoHS-compliant matte-tin plating, qualified for lead-free reflow profiles up to 260°C for 10 seconds. Its UL94V-0 epoxy body remains stable under these thermal conditions without cracking or delamination.
How is polarity marked on the 1N4740PE3/TR8?
The 1N4740PE3/TR8 uses a cathode band (colored stripe) to indicate the cathode terminal. For proper Zener regulation, the banded end must be held at higher potential than the anode-i.e., the cathode connects to the unregulated input side, and the anode connects to ground or the regulated output node.
1N4740PE3/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:
- ±10%
- 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)
1N4740PE3/TR8 FAQ
1.How can I place an order for 1N4740PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740PE3/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 1N4740PE3/TR8 reliable?
The price and inventory of 1N4740PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4740PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740PE3/TR8?
1N4740PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740PE3/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 1N4740PE3/TR8?
For technical support, including 1N4740PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740PE3/TR8 requirements.
6.How does Aetrix verify that 1N4740PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4740PE3/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 1N4740PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4740PE3/TR8?
All 1N4740PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740PE3/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 1N4740PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4740PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740PE3/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
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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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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