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Microchip Technology 1N4758P/TR12
- Part No.:
- 1N4758P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4758P/TR12.pdf
- Description:
- DIODE ZENER 56V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,969
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Product details
Overview
1N4758P/TR12 from Microsemi is a 56 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 4.5 mA test current, 110 Ω dynamic impedance at IZT, and 2000 mA maximum surge current. It provides stable voltage regulation in power supply reference, overvoltage protection, and voltage-clamping circuits across industrial temperature range.
For engineers reviewing the 1N4758P/TR12 datasheet, 1N4758P/TR12 pinout, 1N4758P/TR12 application, or 1N4758P/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), steady-state power rating at defined lead temperature, reverse leakage at test voltage (5 µA @ 42.6 V), and RoHS-compliant "e3" plating option availability.
Technical Context
The 1N4758P/TR12 operates as a reverse-biased voltage reference device with sharp breakdown knee, characterized by a nominal Zener voltage of 56 V measured at 4.5 mA DC test current and 25 °C lead temperature. Its 110 Ω dynamic impedance at IZT and 16 Ω knee impedance at 0.25 mA ensure low AC ripple sensitivity and stable regulation under varying load conditions.
Thermal performance is defined by 45 °C/W junction-to-lead resistance at 10 mm lead length and 105 °C/W junction-to-ambient on FR4 board (1 oz Cu, 4 mm² pad). It maintains operation from –65 °C to +150 °C and supports soldering at 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 4.5 mA, TL = 25 °C - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 1.0 W at TL < 105 °C (3/8″ lead length) - sets maximum continuous DC power handling |
| Dynamic Impedance (ZZT) | 110 Ω at IZT = 4.5 mA - determines AC regulation error under varying current |
| Reverse Leakage Current | 5 µA max at VR = 42.6 V - ensures minimal standby power loss in high-impedance bias networks |
| Surge Current (ISM) | 2000 mA peak (½-sine, 1/120 s) - supports transient overvoltage suppression without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design with known lead-length derating |
| Operating Temperature | –65 °C to +150 °C - suitable for under-hood automotive and industrial environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode band marking; terminals are unidirectional anode/cathode leads for through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Must be held positive relative to anode to achieve reverse breakdown and voltage clamping |
| Anode (unbanded end) | Reference return path | Serves as circuit ground or common reference node in shunt regulator configurations |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1 W Zener | Fully compliant with JEDEC 1N47xxA standard for interchangeability and testing consistency |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants - improves power handling reliability |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT assembly logistics |
| RoHS-compliant "e3" option | Matte-tin plating per MIL-STD-750 Method 2026 - ensures solderability and environmental compliance |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 56 V setpoint for control loop stability. Use Value: ±5% VZ tolerance and 110 Ω ZZT minimize output drift under line/load transients. | Use Scenario: Clamping input rails against surge events in industrial sensor interfaces. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess energy to ground during voltage spikes. Use Value: 2000 mA surge rating and –65 °C to +150 °C operation ensure robustness in harsh environments. |
| Voltage-Level Translation | Signal Conditioning Clamp |
Use Scenario: Biasing op-amp inputs to fixed 56 V rail in high-side sensing circuits. IC Role / Device Role / Timing Role: Precision DC level shifter establishing known reference offset for analog front-ends. Use Value: Low 5 µA leakage at 42.6 V prevents loading of high-impedance sensor nodes. | Use Scenario: Limiting analog signal swing to protect ADC inputs in data acquisition systems. IC Role / Device Role / Timing Role: Bidirectional clamp (with series diode) restricting voltage excursions beyond 56 V. Use Value: Sharp knee impedance (16 Ω at 0.25 mA) ensures fast response and minimal signal distortion. |
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 "P" suffix - glass-body DO-35 package; higher thermal resistance (60 °C/W junction-to-lead) | Limited to lower-power or lower-temperature environments due to reduced thermal performance | Select 1N4758A only if legacy glass-body form factor or MIL-PRF-19500 screening is required |
| MMSZ5259B-TP | Surface-mount SOD-123 package; 56 V, ±5%, 500 mW; 100 Ω ZZT at 5 mA | Not suitable for 1 W continuous dissipation; requires PCB layout change and thermal pad design | Choose MMSZ5259B-TP only for space-constrained designs where 500 mW rating suffices |
Compared with 1N4758A and MMSZ5259B-TP, the 1N4758P/TR12 delivers superior thermal management via its plastic DO-41 package and full 1 W rating, making it optimal for through-hole power regulation where lead-temperature derating and surge resilience are critical.
Availability
1N4758P/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and test equipment requiring stable component supply with tape-and-reel packaging for automated assembly.
Supply support for 1N4758P/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 cost-effective, high-stability voltage regulation in commercial and industrial power systems where JEDEC-standardized 1 W Zeners are required.
FAQ
What is the Zener voltage tolerance of the 1N4758P/TR12?
The 1N4758P/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 verified at 4.5 mA test current and 25 °C lead temperature per Microsemi's published electrical characteristics table. The 1N4758P/TR12 does not offer tighter tolerances (e.g., ±2% or ±1%) - those require C- or D-suffix variants not applicable to this part number.
Does the 1N4758P/TR12 have RoHS-compliant plating?
Yes, the 1N4758P/TR12 uses RoHS-compliant annealed matte-tin plating on its axial leads, conforming to MIL-STD-750 Method 2026. The "e3" suffix denotes RoHS compliance, though it is omitted in this specific part number - Microsemi confirms that all 1N47xxAP,e3 devices (including 1N4758P/TR12) ship with e3 plating unless otherwise specified per order code.
What is the maximum surge current rating for the 1N4758P/TR12?
The 1N4758P/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 enables reliable transient suppression in power rails subject to inductive kickback or lightning-induced surges without degradation of the 1N4758P/TR12's Zener characteristics.
How does the thermal resistance of the 1N4758P/TR12 compare to glass-body variants?
The 1N4758P/TR12 features a plastic DO-41 package with a junction-to-lead thermal resistance of 45 °C/W at 10 mm lead length - significantly lower than the 60 °C/W typical for glass-body 1N4758A (DO-35). This 25% improvement allows the 1N4758P/TR12 to sustain higher continuous power at equivalent lead temperatures, enhancing reliability in thermally constrained layouts.
Is the 1N4758P/TR12 suitable for surface-mount assembly?
No, the 1N4758P/TR12 is an axial-lead DO-41 device intended for through-hole mounting only. It is not compatible with reflow or wave soldering processes used for SMT. For surface-mount equivalents, Microsemi offers the SMAJ4758A and MLL4758A in DO-214AC and SOD-80 packages respectively - neither shares pinout, footprint, or thermal profile with the 1N4758P/TR12.
1N4758P/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:
- ±10%
- 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)
1N4758P/TR12 FAQ
1.How can I place an order for 1N4758P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4758P/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 1N4758P/TR12 reliable?
The price and inventory of 1N4758P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4758P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4758P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4758P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4758P/TR12?
1N4758P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4758P/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 1N4758P/TR12?
For technical support, including 1N4758P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4758P/TR12 requirements.
6.How does Aetrix verify that 1N4758P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4758P/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 1N4758P/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4758P/TR12?
All 1N4758P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4758P/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 1N4758P/TR12 part is unused and in its original packaging.
Return procedure for 1N4758P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4758P/TR12 Tags
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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