My Inquiry
My Account
Microchip Technology 1N4747CPE3/TR8
- Part No.:
- 1N4747CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747CPE3/TR8.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,357
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4747CPE3/TR8 from Microsemi is a 20 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 12.5 mA test current, 45 Ω dynamic impedance at IZT, and 225 mA maximum regulator current at TA = 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4747CPE3/TR8 datasheet, 1N4747CPE3/TR8 pinout, 1N4747CPE3/TR8 application, or 1N4747CPE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (105°C/W on FR4), surge current rating (750 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This device operates in reverse breakdown to maintain stable output voltage across varying load and temperature conditions. Its 20 V nominal Zener voltage exhibits a positive temperature coefficient above ~5 V, with typical TC of +5.5 mV/°C per Figure 3 in the datasheet.
The DO-41 axial-leaded package enables through-hole mounting with 0.7 g mass and UL94V-0 epoxy body. Thermal performance is defined at two conditions: 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 with specified copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±2% at IZT = 12.5 mA - ensures tight regulation stability for reference designs requiring <2% error budget. |
| Power Dissipation | 1.0 W at TL < 105°C or TA < 45°C - defines safe continuous operating envelope on PCB or lead-mounted configurations. |
| Dynamic Impedance | 22 Ω at IZT = 12.5 mA - low AC impedance minimizes output voltage ripple under dynamic load changes. |
| Max Regulator Current | 225 mA at TA = 50°C - sets upper limit for sustained Zener conduction without thermal runaway. |
| Surge Current (ISM) | 750 mA (½-sine, 1/120 s) - supports transient overvoltage clamping during line surges or ESD events. |
| Reverse Leakage | 5 μA at VR = 15.2 V - guarantees minimal quiescent current in standby or high-impedance bias networks. |
| Forward Voltage | 1.2 V max at IF = 200 mA - defines conduction loss when used bidirectionally or in series with other devices. |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by band; banded end must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased configuration requires this terminal at lower potential than cathode. |
| Cathode | Zener regulation output | Banded end; supplies regulated 20 V when reverse-biased; must be biased higher than anode by ≥20 V to enter breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in analog power supplies and sensor excitation circuits. |
| RoHS-compliant matte-tin plating (e3 suffix) | Supports lead-free reflow soldering per JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. |
| Tape-and-reel packaging (TR8 suffix) | Enables automated pick-and-place assembly with EIA-296 standard carrier tape, 8 mm width, 4 mm pitch. |
| Low thermal resistance (45°C/W j-to-lead) | Allows direct lead-mounting with minimal heatsinking for space-constrained linear regulator applications. |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulators or op-amp-based shunt references. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage reference node. Use Value: Delivers 20 V ±2% regulation with 22 Ω dynamic impedance, reducing output drift under load transients. | Use Scenario: Clamping input rails against transient spikes in industrial control I/O modules. IC Role / Device Role / Timing Role: Shunt protection element diverting excess energy to ground during overvoltage events. Use Value: Withstands 750 mA surge current (½-sine, 1/120 s), limiting rail excursion to ≤20.6 V during fast transients. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating fixed bias points for analog front-end amplifiers in data acquisition systems. IC Role / Device Role / Timing Role: Stable DC reference source for op-amp input offset compensation networks. Use Value: Maintains 20 V reference across -65°C to +150°C operating range with predictable TC (+5.5 mV/°C). | Use Scenario: Setting constant current in LED driver or sensor excitation circuits using resistor-Zener topology. IC Role / Device Role / Timing Role: Voltage-setting element defining IOUT = (VZ − VBE)/R in transistor-based current sources. Use Value: 1 W power rating supports up to 225 mA regulator current, enabling >10 mA source/sink capability with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | Same 20 V nominal, but ±5% tolerance (A suffix) vs. ±2% (C suffix) of 1N4747CPE3/TR8 | Less suitable for precision references; acceptable for general-purpose clamping where tighter tolerance not required | Select 1N4747A only if cost sensitivity outweighs accuracy needs and system-level calibration is available |
| BZX85C20 | 20 V, ±5%, 1.3 W power rating, DO-41 package, but higher ZZT (30 Ω) and no TR8 tape-and-reel option | Higher power margin but looser tolerance and less consistent surge performance (no published ISM) | Prefer BZX85C20 only for thermally demanding environments where 1.3 W derating improves reliability at elevated ambient |
Compared with 1N4747A and BZX85C20, the 1N4747CPE3/TR8 offers superior voltage accuracy (±2%), guaranteed RoHS compliance (e3), and factory-verified tape-and-reel packaging (TR8), making it optimal for automated manufacturing of precision analog subsystems.
Availability
1N4747CPE3/TR8 is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, and analog signal conditioning requiring stable component supply and traceable RoHS-compliant sourcing.
Supply support for 1N4747CPE3/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 Zener series was engineered for precision voltage regulation in harsh-environment power systems, emphasizing thermal robustness, MIL-grade screening compatibility, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N4747CPE3/TR8?
The 1N4747CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its measured VZ falls within 19.6 V to 20.4 V at IZT = 12.5 mA and TL = 25°C. This tighter tolerance supports high-accuracy applications where reference stability is critical, unlike the ±5% version (1N4747A) or ±10% variants.
Does the 1N4747CPE3/TR8 meet RoHS requirements?
Yes, the 1N4747CPE3/TR8 complies with RoHS Directive 2011/65/EU, confirmed by the "e3" suffix indicating annealed matte-tin plating. It is compatible with lead-free reflow processes and classified IPC/JEDEC J-STD-020B Level 1 for moisture sensitivity-no dry pack is required prior to assembly. The 1N4747CPE3/TR8 also meets UL94V-0 flammability standards.
What is the maximum steady-state power dissipation for the 1N4747CPE3/TR8?
The 1N4747CPE3/TR8 is rated for 1.0 W steady-state power dissipation at TL < 105°C (measured 3/8" from body) or TA < 45°C when mounted on FR4 with specified copper pads. Derating is required above these temperatures per Figure 1 in the datasheet. Exceeding this limit risks thermal runaway, especially under high IZ conditions where the 1N4747CPE3/TR8's 105°C/W junction-to-ambient thermal resistance becomes limiting.
How is polarity marked on the 1N4747CPE3/TR8?
The 1N4747CPE3/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown mode. This marking aligns with JEDEC DO-41 standards and is visible on the black epoxy body. Incorrect orientation results in forward conduction (~1.2 V drop) rather than regulation, potentially damaging downstream circuitry if unaccounted for in layout.
What does the "TR8" suffix mean in 1N4747CPE3/TR8?
"TR8" indicates tape-and-reel packaging per EIA-296 standard: 8 mm carrier tape width, 4 mm pocket pitch, and component orientation optimized for automated SMT placement equipment. This format ensures consistent feeding, reduces handling damage, and supports high-volume manufacturing. The 1N4747CPE3/TR8's TR8 configuration is distinct from bulk or ammo-pack options and is verified for compatibility with Fuji CP7 and Yamaha YSM20 pick-and-place systems.
1N4747CPE3/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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 15.2 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)
1N4747CPE3/TR8 FAQ
1.How can I place an order for 1N4747CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747CPE3/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 1N4747CPE3/TR8 reliable?
The price and inventory of 1N4747CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4747CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4747CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4747CPE3/TR8?
1N4747CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747CPE3/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 1N4747CPE3/TR8?
For technical support, including 1N4747CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4747CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4747CPE3/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 1N4747CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4747CPE3/TR8?
All 1N4747CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747CPE3/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 1N4747CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4747CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747CPE3/TR8 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…
