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Microchip Technology 1N4154/TR
- Part No.:
- 1N4154/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4154/TR.pdf
- Description:
- DIODE GEN PURP 35V 200MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
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Product details
Overview
1N4154/TR from Microsemi is a hermetically sealed, metallurgically bonded silicon switching diode in DO-35 (DO-204AH) glass package, rated for 35 V peak reverse voltage, 200 mA average forward current, and 2 ns reverse recovery time, used in high-speed data line switching and RS-232 interface circuits.
For engineers reviewing the 1N4154/TR datasheet, 1N4154/TR pinout, 1N4154/TR application, or 1N4154/TR equivalent, this page delivers verified electrical parameters, JEDEC-compliant packaging details, MIL-PRF-19500 screening options, junction capacitance (4 pF), and thermal limits (–65°C to +150°C) critical for signal integrity and reliability validation.
Technical Context
This discrete switching diode employs double-plug glass construction with tin/lead or RoHS-compliant matte-tin plated copper-clad steel leads, enabling reliable through-hole mounting and low-leakage operation. Its metallurgical bond ensures stable junction characteristics across temperature extremes.
The device exhibits 1.0 V maximum forward voltage at 30 mA, 25 nA reverse current at 35 V and 25°C, and 100 µA reverse current at 35 V and 150°C - confirming suitability for high-temperature, low-power logic interface and transient suppression roles where fast turn-off and minimal charge storage are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Reverse Voltage (VRWM) | 35 V - defines maximum DC reverse bias before breakdown; sets safe operating margin in 24 V logic and RS-232 clamping circuits. |
| Reverse Recovery Time (trr) | 2 ns - enables clean switching up to ~175 MHz; critical for pulse shaping and digital signal edge fidelity. |
| Junction Capacitance (CJ) | 4 pF @ 0 V - minimizes capacitive loading on high-frequency lines such as Ethernet 10BASE-T receivers. |
| Forward Voltage (VF) | 1.0 V max @ 30 mA - ensures low conduction loss in series-switched signal paths without excessive voltage drop. |
| Reverse Current (IR) | 25 nA @ 35 V, 25°C - supports low-power standby states and prevents false triggering in high-impedance sensing nodes. |
| Operating Junction Temp | –65°C to +150°C - validated for aerospace-grade thermal cycling and industrial control environments. |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass package with axial leads; cathode indicated by black band; total weight 0.2 g; body diameter 1.40–2.29 mm, length 3.05–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source-side of switched signal path; requires minimum 0.5 V forward bias to conduct. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with black band; blocks up to 35 V reverse bias; used for clamping, protection, and polarity-sensitive routing. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded junction | Ensures mechanical stability and consistent trr/CJ performance under thermal shock and vibration. |
| Double-plug glass construction | Eliminates internal voids and delamination risk, supporting long-term hermeticity in humid or corrosive environments. |
| MIL-PRF-19500 screening option | Enables qualification for military/aerospace applications requiring extended life testing and lot traceability. |
| RoHS-compliant variant (e3) | Meets EU Directive 2011/65/EU with matte-tin over copper-clad steel leads; no lead content in termination finish. |
Applications
| RS-232 Interface Protection | Ethernet 10BASE-T Receiver Clamping |
|---|---|
Use Scenario: Protecting UART transceivers from ESD and line transients in industrial serial communication links. IC Role / Device Role: Bidirectional clamping diode placed between TX/RX lines and ground/VCC rails. Use Value: 2 ns trr and 4 pF CJ prevent signal distortion while limiting voltage excursions to ±35 V during 8 kV HBM events. |
Use Scenario: Limiting differential input swing at PHY receiver inputs in legacy 10 Mbps Ethernet hardware. IC Role / Device Role: Low-capacitance clamp diode shunting excess common-mode energy to reference planes. Use Value: 4 pF junction capacitance avoids degrading signal rise/fall times below 100 ns threshold required for 10BASE-T compliance. |
| High-Density Logic Switching | Magnetic Core Driver Isolation |
Use Scenario: Signal routing and level translation in space-constrained PCBs using flexible thru-hole leads. IC Role / Device Role: Fast-switching series element in TTL-to-CMOS interface or clock gating paths. Use Value: DO-35 package footprint (≤2.3 mm Ø × 5.1 mm L) allows >2× higher component density than SOT-23 alternatives. |
Use Scenario: Isolating drive pulses in legacy ferrite core memory systems and thin-film memory controllers. IC Role / Device Role: Flyback energy recirculation path during core reset cycles. Use Value: 500 mA non-repetitive surge rating handles inductive kickback from 100 µH+ core windings without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148WS | Surface-mount SOD-323 package; same 75 V VRWM but 4 ns trr and 4 pF CJ. | Requires rework for PCB layout; better suited for automated assembly and RF bypass vs. through-hole signal routing. | Select when board space is constrained and wave soldering is not used. |
| 1N4448 | Same DO-35 package; higher 75 V VRWM but identical 2 ns trr, 4 pF CJ, and 1.0 V VF @ 30 mA. | Direct replacement where higher reverse voltage margin is needed without changing layout or thermal design. | Choose for 48 V bus interfaces or dual-supply rail clamping where 35 V margin is insufficient. |
Compared with 1N4154/TR, 1N4148WS trades through-hole compatibility for SMT scalability, while 1N4448 retains identical form-factor and speed but doubles reverse voltage headroom - making it ideal for upgraded voltage tolerance without redesign.
Availability
1N4154/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10BASE-T receiver clamping, and high-density logic switching requiring stable component supply, long-lifecycle support, and MIL-PRF-19500 screening capability.
Supply support for 1N4154/TR 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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4154/TR belongs to Microsemi's legacy JEDEC-registered switching diode family designed specifically for high-speed, low-capacitance signal routing in mission-critical computing and communications infrastructure.
FAQ
What is the maximum reverse voltage rating for the 1N4154/TR?
The 1N4154/TR has a working peak reverse voltage (VRWM) of 35 V, verified per T4-LDS-0239 Rev. 1. This rating applies across the full operating temperature range and defines the maximum continuous DC reverse bias the 1N4154/TR can block without significant leakage or breakdown.
Does the 1N4154/TR meet RoHS requirements?
Yes - RoHS-compliant versions of the 1N4154/TR are available with e3 marking, featuring matte-tin over copper-clad steel leads per JESD22-A112. The standard 1N4154/TR may use tin/lead plating unless specified otherwise; always verify suffix code for compliance status.
What is the reverse recovery time of the 1N4154/TR and why does it matter?
The 1N4154/TR has a reverse recovery time (trr) of 2 ns at 10 mA, measured per JEDEC test conditions. This ultrafast value ensures minimal switching delay and reduced ringing in high-frequency digital signal paths, directly supporting reliable operation in 10BASE-T Ethernet and RS-232 timing-critical applications.
Can the 1N4154/TR be used in place of the 1N4148?
No - the 1N4154/TR is not a direct substitute for the 1N4148 due to its lower 35 V VRWM versus 75 V for the 1N4148. While both share DO-35 packaging and similar trr/CJ, using 1N4154/TR in 1N4148-designated positions risks reverse breakdown above 35 V; consult circuit voltage margins before substitution.
What packaging options are available for the 1N4154/TR?
The 1N4154/TR is supplied in DO-35 (DO-204AH) hermetically sealed glass package with axial leads. Tape-and-reel is available per EIA-296 standard; consult factory for minimum order quantities. Lead finish is either tin/lead or RoHS-compliant matte-tin depending on suffix code.
1N4154/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 30 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 2 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 25 V
- Capacitance @ Vr, F:
- 4pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4154/TR FAQ
1.How can I place an order for 1N4154/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4154/TR 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 1N4154/TR reliable?
The price and inventory of 1N4154/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4154/TR is usually 5 days.
3.What payment methods are accepted for 1N4154/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4154/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4154/TR?
1N4154/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4154/TR 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 1N4154/TR?
For technical support, including 1N4154/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4154/TR requirements.
6.How does Aetrix verify that 1N4154/TR is sourced from the original manufacturer or authorized distributors?
All 1N4154/TR 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 1N4154/TR meets industry standards.
7.What is the process for return or replacement of 1N4154/TR?
All 1N4154/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4154/TR, 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 1N4154/TR part is unused and in its original packaging.
Return procedure for 1N4154/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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