My Inquiry
My Account
Microchip Technology 1N4740APE3/TR12
- Part No.:
- 1N4740APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4740APE3/TR12.pdf
- Description:
- DIODE ZENER 10V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,013
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4740APE3/TR12 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 1N4740APE3/TR12 datasheet, 1N4740APE3/TR12 pinout, 1N4740APE3/TR12 application, or 1N4740APE3/TR12 equivalent, key selection criteria include its 10 V nominal Zener voltage, DO-41 axial-leaded package with cathode band marking, 45 °C/W junction-to-lead thermal resistance, and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 10 V reference across a wide current range (1 mA to 250 mA), with low dynamic impedance (7 Ω at 25 mA) ensuring minimal voltage variation under load transients. Its DO-41 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, supports 260 °C soldering for 10 s, and exhibits ESD insensitivity per MIL-STD-750 Method 1020. Its 10 V Zener voltage has a typical temperature coefficient near +5 mV/°C as shown in Figure 3 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V ±5% at 25 mA - defines precise regulation point for reference and clamp applications |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous power handling on PCB |
| 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 before thermal runaway |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Reverse Leakage (IR) | 5 μA max at VR = 7.6 V - ensures low standby power loss in high-impedance bias networks |
| Forward Voltage | 1.2 V max at 200 mA - defines conduction threshold when used in forward-biased protection paths |
Pinout & Package
Package: DO-41 (DO-204AL) axial-leaded plastic case, void-free thermosetting epoxy meeting UL94V-0, cathode indicated by colored band. Terminals are annealed matte-tin plated for RoHS compliance and solderability per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; reference ground node in Zener regulation | Connected to circuit ground or lower-potential node during reverse-bias operation |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in Zener mode | Connected to input voltage source; maintains 10 V relative to anode under breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4740A series | Ensures industry-standard pin compatibility, test conditions, and interchangeability across manufacturers |
| Plastic encapsulation with P suffix | Delivers 45 °C/W junction-to-lead thermal resistance - 30% lower than equivalent glass-body (G-suffix) parts |
| RoHS-compliant "e3" suffix | Confirms matte-tin plating compliant with EU Directive 2011/65/EU and J-STD-609A Class 1 |
| MIL-STD-750 ESD immunity | Eliminates need for external ESD protection in board-level handling and assembly environments |
| Level 1 moisture sensitivity | Permits indefinite ambient storage without dry-packaging or baking prior to reflow |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or ADC reference dividers. IC Role / Device Role / Timing Role: Zener diode providing fixed 10 V reference node independent of input ripple or load variation. Use Value: Enables ±0.5 V regulation accuracy over 1–250 mA operating range, reducing need for precision op-amps in cost-sensitive designs. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 10 V. IC Role / Device Role / Timing Role: Shunt clamping element diverting surge current away from sensitive inputs when voltage exceeds 10 V. Use Value: Limits peak voltage to ≤10.7 V (VZ + ISM × ZZT) during 0.5-cycle surges, preserving signal integrity without active circuitry. |
| Bias Network Stabilizer | Temperature-Compensated Reference |
Use Scenario: Setting stable base-emitter bias points in discrete transistor amplifiers. IC Role / Device Role / Timing Role: Providing low-impedance 10 V node to counteract VBE drift and β variation across temperature. Use Value: Maintains bias point within ±3% over −65°C to +150°C due to predictable Zener TC and low ZZT. | Use Scenario: Forming one leg of a temperature-compensated reference pair with a forward-biased diode. IC Role / Device Role / Timing Role: Contributing positive temperature coefficient (+5 mV/°C) to offset negative TC of silicon junctions. Use Value: Enables <100 ppm/°C net TC in compensated references without trimming resistors or ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A (Microsemi, non-e3) | Same electrical specs but Sn/Pb terminations; not RoHS compliant | Restricted to legacy or non-RoHS production environments | Select only if Pb-containing solder process is mandated and e3 compliance is waived |
| MMBZ5240B (ON Semiconductor) | SMD SOT-23 package; 10 V ±5%, 225 mW rating; ZZT = 17 Ω at 20 mA | Lower power and surface-mount compatible; unsuitable for >225 mW dissipation | Choose for space-constrained PCBs where 1 W dissipation is not required |
Compared with 1N4740APE3/TR12, the 1N4740A lacks RoHS compliance and requires Pb-based assembly, while MMBZ5240B trades 1 W power handling and DO-41 mechanical robustness for SMT footprint and lower thermal mass - making it suitable only for low-power signal-level clamping.
Availability
1N4740APE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and bias network stabilization requiring stable component supply across industrial, instrumentation, and embedded control programs.
Supply support for 1N4740APE3/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 1N4740APE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener diode product line, engineered for ruggedized voltage regulation in harsh-environment power systems where long-term stability and thermal resilience are critical.
FAQ
What is the Zener voltage tolerance for 1N4740APE3/TR12?
The 1N4740APE3/TR12 has a nominal Zener voltage of 10 V with a tolerance of ±5%, as confirmed by the "A" suffix in the part number per JEDEC standard. This tolerance applies at 25 mA test current and 25°C lead temperature, and remains valid across the full operating temperature range of −65°C to +150°C per the manufacturer's characterization data.
Is 1N4740APE3/TR12 RoHS compliant?
Yes, the "e3" suffix in 1N4740APE3/TR12 explicitly denotes RoHS compliance, with annealed matte-tin plating per J-STD-609A Class 1. The device meets EU Directive 2011/65/EU requirements and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
What is the maximum power dissipation of 1N4740APE3/TR12 at 70°C ambient?
At 70°C ambient, the 1N4740APE3/TR12 must be derated per Figure 1 of the datasheet. With a 45 °C/W junction-to-lead thermal resistance and 3/8″ lead length, its usable power drops to approximately 0.78 W - calculated as 1.0 W × (1 − (70 − 25)/105), reflecting linear derating above 50°C ambient on FR4 board.
Can 1N4740APE3/TR12 be used in surface-mount designs?
No, the 1N4740APE3/TR12 uses a DO-41 axial-leaded package and is not surface-mount compatible. For SMT equivalents, Microsemi offers SMAJ4740A and MLL4740A in DO-214AC and SOD-123 packages respectively - both sharing identical 10 V ±5% Zener characteristics but differing in thermal and mechanical performance.
What is the reverse leakage current specification for 1N4740APE3/TR12?
The reverse leakage current for 1N4740APE3/TR12 is specified as ≤5 μA at a reverse test voltage (VR) of 7.6 V, measured at 25°C. This low leakage ensures minimal quiescent current draw in high-impedance bias networks and preserves accuracy in precision reference divider configurations.
1N4740APE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N4740APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4740APE3/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 1N4740APE3/TR12 reliable?
The price and inventory of 1N4740APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4740APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4740APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4740APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4740APE3/TR12?
1N4740APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4740APE3/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 1N4740APE3/TR12?
For technical support, including 1N4740APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4740APE3/TR12 requirements.
6.How does Aetrix verify that 1N4740APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4740APE3/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 1N4740APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4740APE3/TR12?
All 1N4740APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4740APE3/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 1N4740APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4740APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4740APE3/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
