My Inquiry
My Account
Microchip Technology 1N4756CPE3/TR12
- Part No.:
- 1N4756CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756CPE3/TR12.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,950
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4756CPE3/TR12 from Microsemi is a 47 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 5.5 mA test current, 80 Ω dynamic impedance at IZT, and 19 Ω knee impedance at 0.25 mA, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4756CPE3/TR12 datasheet, 1N4756CPE3/TR12 pinout, 1N4756CPE3/TR12 application, or 1N4756CPE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), surge current rating (1500 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR12).
Technical Context
This Zener operates in reverse breakdown to maintain stable 47 V output across a wide current range (0.25 mA to 1500 mA), with sharp knee characteristics verified by dual-point impedance measurement per MicroNote 202. Its DO-41 axial-leaded construction provides mechanical robustness and low thermal resistance when lead-mounted at 3/8″ length.
The device exhibits a positive temperature coefficient above ~5 V, with typical TC near +3.5 mV/°C at 47 V (per Figure 3), and is moisture-sensitive Level 1 per J-STD-020B-no dry pack required. It is rated for -65°C to +150°C operation and withstands 260°C soldering for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±2% at 5.5 mA - ensures tight regulation stability in feedback references |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous operation with standard lead heatsinking |
| Dynamic Impedance (ZZT) | 80 Ω at 5.5 mA - minimizes output voltage variation under load transients |
| Knee Impedance (ZZK) | 19 Ω at 0.25 mA - enables stable regulation even near minimum operating current |
| Surge Current (ISM) | 1500 mA (½-sine, 1/120 s) - handles brief overvoltage events without degradation |
| Reverse Leakage (IR) | <5 μA at 35.8 V - guarantees low quiescent current in standby regulation paths |
| Forward Voltage | ≤1.2 V at 200 mA - allows use as clamp or protection diode in forward bias |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; used as cathode return in shunt regulator topologies |
| Cathode | Banded end | Connected to regulated output node; must be held positive relative to anode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming |
| RoHS-compliant "e3" suffix | Meets global environmental compliance requirements without performance trade-offs |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints in SMT assembly prep |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
| Tape-and-reel packaging (TR12) | Supports automated pick-and-place assembly with industry-standard EIA-296 reels |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete op-amp-based regulators. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 47 V setpoint for error amplifier comparison. Use Value: ±2% tolerance and low ZZK ensure <1% output drift across line/load variations and temperature. | Use Scenario: Protecting downstream circuitry from transient overvoltage on DC rails. IC Role / Device Role / Timing Role: Passive crowbar element clamping rail voltage at 47 V during surges. Use Value: 1500 mA surge rating and fast response enable reliable protection without fuse coordination. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Establishing fixed DC offset for analog signal conditioning stages. IC Role / Device Role / Timing Role: Voltage reference node for op-amp summing junctions or DAC output buffers. Use Value: Low 80 Ω ZZT maintains accuracy under varying sink currents up to 50 mA. | Use Scenario: Setting gate/base bias in constant-current LED drivers or transistor amplifiers. IC Role / Device Role / Timing Role: Stable voltage source for resistor-defined bias current generation. Use Value: Tight 47 V ±2% tolerance yields predictable, repeatable current values across production lots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4756A | Same 47 V nominal, but ±5% tolerance (A suffix) instead of ±2% | Acceptable where tighter regulation not required; lower cost | Select 1N4756A if system-level calibration compensates for wider tolerance |
| BZX85C47 | 47 V ±5%, DO-41, 1.3 W rating, higher ZZT (100 Ω typical) | Higher power margin but looser regulation and less stable knee | Choose BZX85C47 only when derated power headroom is prioritized over voltage accuracy |
Compared with 1N4756A and BZX85C47, the 1N4756CPE3/TR12 delivers superior regulation accuracy (±2% vs. ±5%) and lower knee impedance (19 Ω vs. ≥30 Ω), making it optimal for precision reference designs where long-term stability and low-current performance are critical.
Availability
1N4756CPE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and analog signal conditioning applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1N4756CPE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for precision voltage regulation in harsh-environment power systems, emphasizing tight tolerance, low impedance, and robust thermal and ESD performance.
FAQ
What is the Zener voltage tolerance of the 1N4756CPE3/TR12?
The 1N4756CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its measured breakdown voltage falls within 46.06 V to 47.94 V at 5.5 mA test current and 25°C lead temperature, enabling high-accuracy voltage references without post-manufacturing trimming.
Is the 1N4756CPE3/TR12 RoHS compliant?
Yes, the 1N4756CPE3/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its full designation. It uses annealed matte-tin plating on leads and void-free UL94V-0 epoxy encapsulation, meeting EU Directive 2011/65/EU requirements without exemptions.
What is the maximum surge current rating for the 1N4756CPE3/TR12?
The 1N4756CPE3/TR12 has a maximum surge current (ISM) rating of 1500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to transient overvoltage events and is validated per JEDEC test conditions described in the original Microsemi datasheet.
Does the 1N4756CPE3/TR12 require dry packing before PCB assembly?
No, the 1N4756CPE3/TR12 does not require dry packing. It is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30°C/60% RH without baking or humidity-controlled packaging prior to reflow or hand soldering.
What package type and marking does the 1N4756CPE3/TR12 use?
The 1N4756CPE3/TR12 uses the DO-41 (JEDEC DO-204AL) axial-leaded plastic package. The cathode is marked with a distinct color band, and the full part number "1N4756C" is laser-marked or molded onto the body per Microsemi's standard marking practice for this series.
1N4756CPE3/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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 35.8 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)
1N4756CPE3/TR12 FAQ
1.How can I place an order for 1N4756CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756CPE3/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 1N4756CPE3/TR12 reliable?
The price and inventory of 1N4756CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4756CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4756CPE3/TR12?
1N4756CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756CPE3/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 1N4756CPE3/TR12?
For technical support, including 1N4756CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4756CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4756CPE3/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 1N4756CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4756CPE3/TR12?
All 1N4756CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756CPE3/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 1N4756CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4756CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756CPE3/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…
