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Microchip Technology 1N4154-1/TR
- Part No.:
- 1N4154-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4154-1/TR.pdf
- Description:
- DIODE GEN PURP 35V 200MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,385
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Product details
Overview
1N4154-1/TR from Microsemi is a hermetically sealed, metallurgically bonded silicon switching diode in DO-35 (DO-204AH) package, rated for 35 V peak reverse voltage, 200 mA average forward current, and 2 ns reverse recovery time. It delivers low junction capacitance (4 pF) and fast switching performance for high-frequency signal routing in computer peripherals and data interface circuits.
For engineers reviewing the 1N4154-1/TR datasheet, 1N4154-1/TR pinout, 1N4154-1/TR application, or 1N4154-1/TR equivalent, key selection criteria include VRWM = 35 V, trr = 2 ns, VF ≤ 1.0 V @ 30 mA, CJ = 4 pF, and DO-35 mechanical compatibility with thru-hole high-density layouts.
Technical Context
This diode employs internal metallurgical bonding to minimize parasitic inductance and ensure stable high-speed switching behavior. Its double-plug DO-35 glass package provides hermetic sealing and thermal stability across -65 °C to +150 °C junction temperature range.
The 1N4154-1/TR is optimized for unidirectional signal clamping and logic-level switching where low capacitance and rapid turn-off are critical-particularly in RS-232/RS-422 line drivers and Ethernet 10BASE-T transceivers operating below 10 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 35 V - Maximum continuous reverse voltage before breakdown; sets safe operating margin in 24 V logic or 30 V bus clamp designs. |
| trr | 2 ns - Reverse recovery time measured at 10 mA; enables reliable operation up to ~100 MHz square-wave switching. |
| VF | ≤1.0 V @ 30 mA - Forward voltage drop; ensures minimal power loss and voltage headroom in low-voltage signal path applications. |
| CJ | 4 pF @ 0 V - Junction capacitance; supports high-frequency signal integrity in data lines without excessive loading. |
| IO | 200 mA - Average rectified forward current; sufficient for driving TTL/CMOS inputs or small-signal relay coils. |
| TJ Range | -65 °C to +150 °C - Operating junction temperature range; validated for industrial and extended-temperature embedded systems. |
Pinout & Package
DO-35 (DO-204AH) glass axial package with cathode indicated by a single color band; tin/lead or RoHS-compliant matte-tin plated copper-clad steel leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; requires layout clearance for thermal dissipation in sustained 200 mA operation. |
| Cathode | Forward current exit / reverse blocking terminal | Banded end; referenced to ground or lower-potential rail in clamping configurations; defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents moisture ingress and long-term parameter drift; qualified for mission-critical industrial control and aerospace-adjacent environments. |
| Metallurgical bonding | Eliminates wire bonds to reduce parasitic inductance (<0.5 nH), improving high-frequency transient response over epoxy-packaged alternatives. |
| Double-plug construction | Enhances mechanical robustness and thermal cycling reliability in vibration-prone equipment such as network switches and test instrumentation. |
| Low trr (2 ns) | Enables clean edge transitions in digital logic interfaces without overshoot or ringing when used in series with 50 Ω transmission lines. |
Applications
| RS-232 Line Protection | Ethernet 10BASE-T Transceiver |
|---|---|
Use Scenario: Protecting UART TX/RX lines against ESD and voltage transients in industrial serial gateways. IC Role / Device Role: Unidirectional clamping diode placed between signal line and ground rail. Use Value: 2 ns trr prevents signal distortion during 115.2 kbps bursts; 4 pF capacitance avoids RC filtering of rise/fall edges. | Use Scenario: Signal conditioning and DC bias isolation in 10 Mbps Ethernet PHY front-end circuits. IC Role / Device Role: High-speed AC coupling and level-shifting diode in differential pair termination networks. Use Value: 35 V VRWM safely handles ±15 V common-mode swings; DO-35 axial form factor fits tight 0.1" pitch connector footprints. |
| Computer Peripheral Decoding | Magnetic Core Memory Driver |
Use Scenario: Address decoding logic in legacy PC expansion cards using discrete TTL gates. IC Role / Device Role: Fast switching element in AND/OR gate arrays and pulse shaping networks. Use Value: Sub-5 ns switching enables reliable 10 MHz clock domain synchronization; 200 mA IO sustains fan-out to 10+ TTL loads. | Use Scenario: Current steering in ferrite core memory word-line drivers for early minicomputers. IC Role / Device Role: High-speed switch controlling bidirectional current pulses through magnetic cores. Use Value: Metallurgical bonding ensures consistent 2 ns trr across temperature extremes (-55 °C to +125 °C), preserving timing margins in core access cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148-TR | VRWM = 75 V, trr = 4 ns, VF = 1.0 V @ 10 mA | Higher reverse voltage rating but slower recovery; less suitable for >5 MHz signal paths | Select when system-level reverse stress exceeds 35 V and speed requirements are relaxed. |
| BAS16-TR | VRWM = 85 V, trr = 4 ns, SOT-23 surface-mount package | No thru-hole mounting; incompatible with DO-35 footprint; higher thermal resistance in same power dissipation | Choose only for new SMT designs where board space is constrained and 75 V standoff is required. |
Compared with 1N4154-1/TR, the 1N4148-TR offers greater reverse voltage margin at the cost of 2× longer trr, while the BAS16-TR trades axial thru-hole compatibility for SMT scalability-neither is pin-compatible, and both require layout revision.
Availability
1N4154-1/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10BASE-T signal conditioning, and computer peripheral decoding requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for 1N4154-1/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 1N4154-1/TR belongs to Microsemi's legacy JEDEC-registered switching diode family designed specifically for military-grade and high-stability commercial applications demanding hermetic sealing, metallurgical bonding, and MIL-PRF-19500 screening capability.
FAQ
What is the maximum reverse voltage rating for the 1N4154-1/TR?
The 1N4154-1/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 steady-state reverse bias the 1N4154-1/TR can withstand without significant leakage or breakdown. It is not interchangeable with 75 V-rated variants like the 1N4149-1/TR.
Does the 1N4154-1/TR meet RoHS requirements?
Yes, the 1N4154-1/TR is available in RoHS-compliant versions marked with "e3" per part nomenclature. The device uses matte-tin over copper-clad steel leads compliant with JESD201A Class 1a whisker resistance requirements, and its hermetic glass package contains no restricted substances above threshold limits.
What is the reverse recovery time (trr) specification for the 1N4154-1/TR?
The 1N4154-1/TR has a reverse recovery time (trr) of 2 ns, measured at 10 mA forward current and specified in the Electrical Characteristics table on page 2 of T4-LDS-0239. This value reflects the time required for the 1N4154-1/TR to transition from conduction to blocking state under standardized test conditions and is critical for high-speed digital interface design.
Can the 1N4154-1/TR be used in place of the 1N4148-TR?
No-the 1N4154-1/TR is not a direct replacement for the 1N4148-TR due to differing VRWM (35 V vs. 75 V) and trr (2 ns vs. 4 ns). While both are DO-35 switching diodes, substituting the 1N4154-1/TR in a 1N4148-TR design risks reverse breakdown if circuit transients exceed 35 V; conversely, replacing 1N4154-1/TR with 1N4148-TR may degrade timing in >5 MHz signal paths.
What package type does the 1N4154-1/TR use?
The 1N4154-1/TR uses the DO-35 (also designated DO-204AH) hermetically sealed glass axial package. Dimensions conform to MIL-PRF-19500 requirements: body diameter 1.40–2.29 mm, body length 3.05–5.08 mm, lead length ≥25.4 mm, with cathode identified by a single band. Lead finish is either tin/lead or RoHS-compliant matte-tin.
1N4154-1/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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4154-1/TR FAQ
1.How can I place an order for 1N4154-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4154-1/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 1N4154-1/TR reliable?
The price and inventory of 1N4154-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4154-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4154-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4154-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4154-1/TR?
1N4154-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4154-1/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 1N4154-1/TR?
For technical support, including 1N4154-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4154-1/TR requirements.
6.How does Aetrix verify that 1N4154-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4154-1/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 1N4154-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4154-1/TR?
All 1N4154-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4154-1/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 1N4154-1/TR part is unused and in its original packaging.
Return procedure for 1N4154-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4154-1/TR Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
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MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
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