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Microchip Technology 1N4758CP/TR12
- Part No.:
- 1N4758CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4758CP/TR12.pdf
- Description:
- DIODE ZENER 56V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
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Product details
Overview
1N4758CP/TR12 from Microsemi is a 56 V, 1 W axial-lead Zener diode in DO-41 plastic package with ±5% voltage tolerance, 4.5 mA test current, and 110 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4758CP/TR12 datasheet, 1N4758CP/TR12 pinout, 1N4758CP/TR12 application, or 1N4758CP/TR12 equivalent, key selection factors include its 56 V nominal Zener voltage, 1.0 W power rating at 25 °C, DO-41 mechanical outline, cathode-band polarity marking, and TR12 tape-and-reel packaging for automated assembly.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across a wide current range (0.25 mA to 2 A surge), with thermal resistance of 45 °C/W junction-to-lead and 105 °C/W junction-to-ambient on FR4 PCB. Its Zener knee occurs at 0.25 mA with 16 Ω impedance, enabling low-current regulation.
It features moisture sensitivity Level 1 per J-STD-020B (no dry pack required), RoHS-compliant matte-tin plating, UL94V-0 epoxy case, and is rated for operation from –65 °C to +150 °C. Forward voltage is ≤1.2 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 4.5 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 1.0 W at 25 °C lead temperature - sets maximum continuous DC power handling |
| Dynamic Impedance (ZZT) | 110 Ω at 4.5 mA - indicates voltage stability under small-signal AC variation |
| Max Reverse Current (IR) | 5 μA at 42.6 V - specifies leakage below regulation threshold |
| Surge Current (ISM) | 2000 mA (½-sine, 1/120 s) - supports transient overvoltage clamping capability |
| Thermal Resistance | 45 °C/W junction-to-lead - determines temperature rise under 1 W load with 10 mm lead length |
| Operating Temperature | –65 °C to +150 °C - enables use in industrial and automotive under-hood environments |
Pinout & Package
DO-41 (JEDEC 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 | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node to enable reverse breakdown at 56 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Registered Zener | Complies with industry-standard 1N47xxA series mechanical and electrical definitions |
| Plastic P-Suffix Construction | Lower thermal resistance vs. glass-body (G-suffix) variants, improving power handling reliability |
| Tape-and-Reel Packaging (TR12) | Standard EIA-296 format with 12 mm tape width - optimized for high-speed pick-and-place placement |
| ESD Robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly |
| Moisture Sensitivity Level | Level 1 per IPC/JEDEC J-STD-020B - no baking or dry pack required before reflow |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or shunt-regulated DC-DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 56 V setpoint for error amplifier input. Use Value: Maintains ±5% regulation across 0.25–200 mA operating current, reducing output drift under load transients. | Use Scenario: Protecting downstream circuitry from voltage surges exceeding 56 V in 48 V telecom or industrial bus systems. IC Role / Device Role / Timing Role: Passive crowbar element conducting during overvoltage events to limit rail excursion. Use Value: Withstands 2000 mA surge (½-sine, 1/120 s), clamping transients without degradation when properly heatsinked. |
| Signal Level Shifting | Temperature-Stable Bias Generator |
Use Scenario: Establishing fixed DC offset for op-amp inputs or ADC reference points in sensor signal chains. IC Role / Device Role / Timing Role: Precision DC bias source leveraging sharp Zener knee and low dynamic impedance. Use Value: 110 Ω ZZT ensures minimal voltage shift under varying sink currents, improving measurement repeatability. | Use Scenario: Generating stable bias voltages for RF amplifier stages where thermal drift must be minimized. IC Role / Device Role / Timing Role: Temperature-compensated reference node using inherent Zener tempco characteristics near 56 V. Use Value: Exhibits near-zero temperature coefficient (~0 mV/°C) at 56 V, reducing bias drift over –40 °C to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4758A | No TR suffix - bulk bag packaging; same electrical specs and DO-41 package | Lacks tape-and-reel format; unsuitable for automated SMT lines requiring TR12 carrier tape | Select 1N4758CP/TR12 when board-level automation requires EIA-296 compliant feeding |
| MMSZ5256ET1G | Surface-mount SOD-123 package; 56 V ±5%, 500 mW rating; 100 Ω ZZT at 10 mA | Lower power rating and different footprint - requires PCB redesign and derating for 1 W operation | Choose MMSZ5256ET1G only for space-constrained designs where 500 mW suffices and reflow compatibility is prioritized |
Compared with 1N4758A and MMSZ5256ET1G, the 1N4758CP/TR12 uniquely combines 1 W power handling, DO-41 axial-leaded form factor, and TR12 tape-and-reel delivery-making it optimal for through-hole or mixed-technology production requiring high-current regulation and automated assembly support.
Availability
1N4758CP/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and signal level shifting applications requiring stable component supply, consistent Zener voltage tolerance, and reliable tape-and-reel delivery for high-volume manufacturing.
Supply support for 1N4758CP/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems where long-term stability, JEDEC compliance, and moisture-insensitive packaging are critical.
FAQ
What is the Zener voltage tolerance of the 1N4758CP/TR12?
The 1N4758CP/TR12 has a nominal Zener voltage of 56 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is specified at 4.5 mA test current and 25 °C lead temperature, and applies across its full operating temperature range of –65 °C to +150 °C. The "P" suffix confirms plastic DO-41 construction, and "TR12" denotes EIA-296 tape-and-reel packaging.
Does the 1N4758CP/TR12 require dry packing before reflow soldering?
No, the 1N4758CP/TR12 does not require dry packing prior to reflow. It is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at standard ambient conditions without baking. This eliminates pre-reflow moisture mitigation steps and reduces process complexity in manufacturing lines handling the 1N4758CP/TR12.
What is the maximum surge current rating for the 1N4758CP/TR12?
The 1N4758CP/TR12 is rated for a maximum non-repetitive reverse surge current (ISM) of 2000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating supports transient overvoltage clamping in 48 V industrial systems, provided thermal limits are observed and adequate PCB copper area is used for heat dissipation during surge events involving the 1N4758CP/TR12.
How does the thermal resistance of the 1N4758CP/TR12 affect its power derating?
The 1N4758CP/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 10 mm lead length, meaning each watt of dissipated power raises the junction temperature by 45 °C above lead temperature. At ambient temperatures above 25 °C or with limited PCB copper area, power must be derated linearly per Microsemi's Figure 1 curve to keep junction temperature below 150 °C - a key constraint when designing systems using the 1N4758CP/TR12 for continuous regulation.
Is the 1N4758CP/TR12 RoHS compliant?
Yes, the 1N4758CP/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation for the 1N4728AP–1N4764AP,e3 series. Its terminations use annealed matte-tin plating, and its void-free thermosetting epoxy case meets UL94V-0 flammability requirements - all verified for compliance in devices shipped with the "e3" suffix, including the 1N4758CP/TR12.
1N4758CP/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):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 110 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 42.6 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)
1N4758CP/TR12 FAQ
1.How can I place an order for 1N4758CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4758CP/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 1N4758CP/TR12 reliable?
The price and inventory of 1N4758CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4758CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4758CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4758CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4758CP/TR12?
1N4758CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4758CP/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 1N4758CP/TR12?
For technical support, including 1N4758CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4758CP/TR12 requirements.
6.How does Aetrix verify that 1N4758CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4758CP/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 1N4758CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4758CP/TR12?
All 1N4758CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4758CP/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 1N4758CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4758CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4758CP/TR12 Tags
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MMBZ5240B-7-F
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Diodes Incorporated
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MMSZ5231B-7-F
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