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Microchip Technology 1N4740CE3/TR13
- Part No.:
- 1N4740CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740CE3/TR13.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,313
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Product details
Overview
1N4740CE3/TR13 from Microsemi is a 10 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic 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 1N4740CE3/TR13 datasheet, 1N4740CE3/TR13 pinout, 1N4740CE3/TR13 application, or 1N4740CE3/TR13 equivalent, key selection factors include its tight 2% Zener voltage tolerance (C suffix), RoHS-compliant matte-tin plating (e3 suffix), tape-and-reel packaging (TR13), 45 °C/W junction-to-lead thermal resistance, and compliance with MIL-PRF-19500 screening options when prefixed.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 10 V reference across a wide current range (1–25 mA typical), with low dynamic impedance ensuring minimal output variation under load transients. Its DO-41 axial-leaded plastic package delivers lower thermal resistance than glass-body variants and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
The device features a sharp knee in the breakdown curve verified by dual-point Zener impedance measurement per MicroNote 202, and exhibits ESD insensitivity per MIL-STD-750 Method 1020. Its forward voltage is ≤1.2 V at 200 mA, supporting bidirectional testing and polarity verification during assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V ±2% at IZT = 25 mA - ensures precise reference accuracy for feedback loops and analog thresholds |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - defines safe continuous operating envelope on PCBs with standard lead mounting |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 25 mA - limits output voltage deviation under changing load currents |
| Max Regulator Current (IZM) | 0.25 A at TA = 50°C - sets upper limit for sustained regulation before thermal derating applies |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - enables thermal modeling for reliability in high-ambient environments |
| Reverse Leakage (IR) | ≤10 μA at VR = 7.6 V - guarantees low standby power loss in shunt regulator topologies |
| Operating Temperature | −65°C to +150°C - supports deployment in automotive under-hood, industrial control, and aerospace subsystems |
Pinout & Package
Package: DO-41 (DO-204AL) plastic molded case with void-free thermosetting epoxy (UL94V-0), axial leads, cathode indicated by band. Tin-lead or RoHS-compliant matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in shunt regulator | Connected to system ground or lower-potential rail; must be held negative relative to cathode for Zener operation |
| Cathode | Regulated output node | Banded end; connected to unregulated input via series resistor; supplies stable 10 V to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop stability and reduced calibration overhead in precision power supplies |
| RoHS-compliant matte-tin plating (e3 suffix) | Supports lead-free reflow assembly without compromising solderability or intermetallic formation |
| Tape-and-reel packaging (TR13 suffix) | Enables automated pick-and-place placement for high-volume PCB manufacturing |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints, reducing handling cost and inventory complexity |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces need for special ESD handling during board assembly and field service |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback networks to set output voltage in AC/DC adapters and DC/DC converters. IC Role / Device Role / Timing Role: Zener reference element providing stable 10 V threshold for error amplifier comparison. Use Value: Tight ±2% tolerance minimizes output voltage drift across production lots and temperature, improving compliance with safety and efficiency standards. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages exceeding 10 V. IC Role / Device Role / Timing Role: Shunt protection device that conducts excess energy to ground when line voltage exceeds VZ. Use Value: Low 7 Ω ZZT ensures rapid clamping response and predictable trip point, limiting peak voltage to ≤10.5 V under 100 mA surge. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Paired with a current-setting resistor to generate a stable 10 V reference for ADCs, DACs, or sensor signal conditioning. IC Role / Device Role / Timing Role: Precision voltage source establishing known potential for analog front-end circuitry. Use Value: −65°C to +150°C operating range and low tempco enable use in extended-temperature instrumentation without external compensation. | Use Scenario: Biases the base of a BJT or gate of a MOSFET in constant-current sink/source circuits. IC Role / Device Role / Timing Role: Stable voltage reference defining emitter/base or source/gate potential difference. Use Value: 1 W power rating allows direct drive of medium-current bias networks (up to 100 mA) without auxiliary regulators or heat sinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | Same 10 V, ±5% tolerance (A suffix), non-RoHS tin-lead plating, bulk packaging | Lower accuracy; requires leaded assembly process; no TR tape-and-reel option | Select when cost sensitivity outweighs tolerance and RoHS requirements |
| MMSZ4700T1G | Surface-mount SOD-123 package, same 10 V ±5%, 500 mW rating, RoHS compliant | Not drop-in compatible; lower power; suited for space-constrained PCBs | Select for high-density layouts where axial leads are impractical |
Compared with 1N4740A and MMSZ4700T1G, the 1N4740CE3/TR13 offers superior voltage accuracy (±2% vs. ±5%), full RoHS compliance, and automated assembly support-making it optimal for precision, high-reliability, and volume-manufactured power systems where regulatory and performance consistency are critical.
Availability
1N4740CE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 1N4740CE3/TR13 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 1N47xx series was designed specifically for robust, cost-effective voltage regulation in power conversion, protection, and reference applications-emphasizing JEDEC-standard compatibility, wide temperature operation, and screening flexibility for mission-critical systems.
FAQ
What is the Zener voltage tolerance of the 1N4740CE3/TR13?
The 1N4740CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 10 V Zener voltage is guaranteed between 9.8 V and 10.2 V when measured at 25 mA test current and 25°C lead temperature. This tighter tolerance improves accuracy in feedback networks and reference designs compared to standard ±5% variants like the 1N4740A.
Does the 1N4740CE3/TR13 support lead-free assembly processes?
Yes, the 1N4740CE3/TR13 supports lead-free assembly. The "e3" suffix indicates RoHS-compliant matte-tin plating on its axial leads, qualified for soldering at 260°C for 10 seconds per MIL-STD-750 Method 2026. Its DO-41 package is compatible with standard reflow and wave solder profiles used in modern electronics manufacturing.
What is the maximum continuous Zener current for the 1N4740CE3/TR13 at room temperature?
The 1N4740CE3/TR13 supports a maximum continuous Zener current (IZM) of 0.25 A at ambient temperature (TA) = 50°C. At 25°C ambient, derating is not required, but thermal design must account for its 45 °C/W junction-to-lead resistance and 1.0 W power rating. Exceeding IZM risks thermal runaway or parametric shift.
How is polarity identified on the 1N4740CE3/TR13?
The 1N4740CE3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be held positive relative to the anode for proper Zener regulation. During forward bias testing, the anode is positive and forward voltage is ≤1.2 V at 200 mA. Correct orientation is essential to avoid open-circuit behavior or unintended conduction in shunt regulator configurations.
Is the 1N4740CE3/TR13 suitable for high-reliability military applications?
Yes-the base 1N4740A is JEDEC-registered and qualifies for MIL-PRF-19500 screening when prefixed with MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS). While the 1N4740CE3/TR13 itself is a commercial-grade RoHS variant, its underlying die and construction are identical; customers requiring screened versions should specify the appropriate prefix with "e3" and "TR" suffixes per factory consultation.
1N4740CE3/TR13 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:
- ±2%
- 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)
1N4740CE3/TR13 FAQ
1.How can I place an order for 1N4740CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740CE3/TR13 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 1N4740CE3/TR13 reliable?
The price and inventory of 1N4740CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4740CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740CE3/TR13?
1N4740CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740CE3/TR13 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 1N4740CE3/TR13?
For technical support, including 1N4740CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740CE3/TR13 requirements.
6.How does Aetrix verify that 1N4740CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4740CE3/TR13 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 1N4740CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4740CE3/TR13?
All 1N4740CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740CE3/TR13, 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 1N4740CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N4740CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740CE3/TR13 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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