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Microchip Technology 1N457
- Part No.:
- 1N457
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N457.pdf
- Description:
- DIODE GEN PURP 60V 150MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
1N457 from Microsemi is a JEDEC-registered hermetically sealed glass switching diode in DO-35 package, with 70 V maximum reverse voltage, 150 mA average output current, and 1.0 V forward voltage at 100 mA. It delivers fast switching performance for RS-232 interface networks and high-frequency data line applications.
For engineers reviewing the 1N457 datasheet, 1N457 pinout, 1N457 application, or 1N457 equivalent, key selection criteria include reverse voltage rating (VRM = 70 V), junction temperature range (–65 °C to +150 °C), metallurgical bonding construction, hermetic sealing, and DO-35 through-hole mechanical compatibility.
Technical Context
This discrete silicon switching diode uses metallurgical bonding and double-plug DO-35 glass encapsulation to achieve low capacitance and fast recovery. Its design supports high-speed signal routing in legacy serial interfaces where leakage control and thermal stability are critical.
Rated for –65 °C to +150 °C junction operation and qualified to MIL-PRF-19500/193 at JAN level, the 1N457 maintains stable VF ≤ 1.0 V at 100 mA and IR ≤ 25 nA at VRWM = 60 V, enabling reliable use in industrial and aerospace environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Reverse Voltage (VRM) | 70 V - defines absolute maximum non-repetitive reverse blocking capability without breakdown |
| Working Peak Reverse Voltage (VRWM) | 60 V - maximum continuous reverse voltage under normal operating conditions |
| Forward Voltage (VF) | 1.0 V max @ 100 mA - ensures low conduction loss in signal-level switching paths |
| Avg Output Current (IO) | 150 mA @ 25 °C - usable DC rectification capacity before thermal derating applies |
| Junction Temp Range | –65 °C to +150 °C - supports operation in extreme environmental conditions |
| Reverse Leakage (IR) | 25 nA @ VRWM = 60 V - minimal signal path disturbance in high-impedance circuits |
| Power Dissipation (PD) | 500 mW - sets thermal limit for continuous operation in ambient air |
Pinout & Package
DO-35 glass axial package with cathode band marking; tin/lead or RoHS-compliant matte tin plating on copper-clad steel leads; weight 0.2 g; polarity indicated by banded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of signal path during conduction |
| Cathode | Forward current exit point | Banded end; connects to higher-potential side; defines polarity for correct orientation in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded junction | Enables robust thermal cycling performance and long-term reliability in harsh environments |
| Hermetically sealed glass case | Prevents moisture ingress and contamination, preserving electrical characteristics over lifetime |
| Double-plug DO-35 construction | Provides mechanical rigidity and consistent lead alignment for automated through-hole insertion |
| JAN qualification per MIL-PRF-19500/193 | Validates compliance with military-grade screening, testing, and traceability requirements |
| Low capacitance & fast switching | Supports clean edge transitions in RS-232 and Ethernet 10Base-T signal conditioning paths |
Applications
| RS-232 Interface Protection | Ethernet 10Base-T Signal Clamping |
|---|---|
Use Scenario: Bidirectional ESD and transient suppression on RS-232 TX/RX lines in industrial terminals. IC Role / Device Role / Timing Role: Signal-level clamping diode placed between driver/receiver and connector. Use Value: Leverages 60 V VRWM and 25 nA IR to maintain signal integrity while limiting transients below IC damage thresholds. | Use Scenario: Polarity protection and voltage limiting on 10Base-T transformer center taps. IC Role / Device Role / Timing Role: Fast-switching clamp protecting PHY-side analog circuitry from induced surges. Use Value: 1.0 V VF and DO-35 mechanical stability ensure minimal insertion loss and repeatable board-level performance. |
| Switching Core Driver Isolation | Local Area Network Transceiver Biasing |
Use Scenario: Isolating gate drive signals in isolated DC-DC converter feedback loops. IC Role / Device Role / Timing Role: High-speed unidirectional signal path isolator with low forward drop. Use Value: 150 mA IO rating and –65 °C to +150 °C TJ range support sustained operation in thermally constrained power stages. | Use Scenario: Bias network stabilization in multi-drop LAN transceivers operating across wide temperature ranges. IC Role / Device Role / Timing Role: Precision current steering element in reference voltage dividers. Use Value: Tight VF tolerance (≤1.0 V) and metallurgical bond structure reduce drift in bias-sensitive analog front ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148 | Lower VRM (100 V), higher IF (300 mA), same DO-35 package but commercial-only qualification | Not JAN-qualified; unsuitable for mil-aero programs requiring MIL-PRF-19500 screening | Select when cost sensitivity outweighs military qualification needs and higher reverse voltage is acceptable |
| 1N914 | Identical VRM (70 V) and VF (1.0 V), but no JAN version available and IR spec looser (≤25 µA vs. ≤25 nA) | Limited to commercial-grade systems due to absence of hermetic seal validation and tighter IR requirement | Choose only for non-critical consumer applications where leakage immunity is not required |
Compared with 1N457, the 1N4148 offers higher current handling but lacks military qualification, while the 1N914 matches reverse voltage but fails to meet the 25 nA leakage threshold essential for precision signal paths in industrial communications.
Availability
1N457 is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10Base-T signal clamping, and switching core driver isolation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N457 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 Corporation (now part of Microchip Technology) specialized in high-reliability analog and RF semiconductors, particularly for defense, aerospace, and industrial markets.
The 1N457 belongs to Microsemi's legacy JEDEC-registered switching diode family, engineered for mission-critical signal integrity in harsh-environment serial communication and power control systems.
FAQ
What is the maximum reverse voltage rating for the 1N457?
The 1N457 has a maximum reverse voltage (VRM) rating of 70 V, which represents its absolute peak non-repetitive blocking capability. This value is confirmed in the Microsemi T4-LDS-0023 datasheet and defines the upper limit before avalanche breakdown occurs. The working peak reverse voltage (VRWM) is 60 V, intended for continuous operation. Engineers must respect both limits when designing clamping or rectification circuits using the 1N457.
Is the 1N457 available in JAN-qualified versions?
Yes, the 1N457 is available in JAN-qualified versions compliant with MIL-PRF-19500/193. These parts carry the "JAN" prefix (e.g., JAN 1N457) and undergo rigorous screening including temperature cycling, burn-in, and lot acceptance testing. The JAN qualification ensures suitability for defense and aerospace applications where reliability and traceability are mandatory - a key differentiator from commercial-only alternatives like the 1N4148 or 1N914.
What package type does the 1N457 use, and how is polarity marked?
The 1N457 uses the DO-35 glass axial package with metallurgically bonded construction and hermetic sealing. Polarity is marked by a visible cathode band on the blue-coated glass body. The banded end corresponds to the cathode terminal, and the unmarked end is the anode. This marking aligns with industry-standard diode orientation conventions and supports automated optical inspection during PCB assembly.
What is the forward voltage specification for the 1N457 at 100 mA?
The 1N457 has a maximum forward voltage (VF) of 1.0 V at 100 mA forward current, measured under pulsed conditions (tp = 8.5 ms, duty cycle ≤ 2%). This specification ensures predictable conduction loss in signal-level switching applications such as RS-232 line protection. The tight VF control contributes to consistent timing behavior and low power dissipation in high-density layouts where thermal management is constrained.
How does the 1N457 compare to the 1N458 and 1N459 in terms of voltage ratings?
The 1N457, 1N458, and 1N459 share identical forward voltage (1.0 V), leakage current (25 nA), and thermal specifications, but differ in reverse voltage ratings: 1N457 has VRM = 70 V / VRWM = 60 V; 1N458 is rated at 150 V / 125 V; and 1N459 at 200 V / 175 V. All three use the same DO-35 package and metallurgical construction, allowing direct substitution only when voltage requirements align - the 1N457 remains optimal for 60 V-class signal integrity applications.
1N457 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 60 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 25 nA @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N457 FAQ
1.How can I place an order for 1N457 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N457 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 1N457 reliable?
The price and inventory of 1N457 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N457 is usually 5 days.
3.What payment methods are accepted for 1N457?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N457 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N457?
1N457 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N457 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 1N457?
For technical support, including 1N457 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N457 requirements.
6.How does Aetrix verify that 1N457 is sourced from the original manufacturer or authorized distributors?
All 1N457 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 1N457 meets industry standards.
7.What is the process for return or replacement of 1N457?
All 1N457 units undergo pre-shipment inspection (PSI). If there is an issue with 1N457, 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 1N457 part is unused and in its original packaging.
Return procedure for 1N457:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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