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Nexperia USA Inc. 1N4531,143
- Part No.:
- 1N4531,143
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- DO-204AG, DO-34, Axial
- Datasheet:
-
1N4531,143.pdf
- Description:
- DIODE GEN PURP 75V 200MA DO34
- Quantity:
- Payment:
- Shipping:
Inventory:2,065
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Product details
Overview
1N4531,143 from Nexperia is a high-speed switching diode in a hermetically sealed SOD68 (DO-34) glass package, designed for fast transient response with 4 ns reverse recovery time, 75 V repetitive peak reverse voltage, and 450 mA repetitive peak forward current. It serves as a protection diode in reed relay circuits and high-frequency signal routing where low capacitance (4 pF) and minimal forward voltage (1000 mV at 10 mA) are critical.
For engineers reviewing the 1N4531,143 datasheet, 1N4531,143 pinout, 1N4531,143 application, or 1N4531,143 equivalent, key selection criteria include verified trr ≤ 4 ns, VR(RM) = 75 V, IF(RM) = 450 mA, Cd = 4 pF at 0 V, and thermal resistance Rth j-a = 350 K/W under standard lead-length conditions.
Technical Context
This planar-processed silicon diode operates as a unidirectional, low-capacitance, fast-recovery rectifier optimized for signal-level switching rather than power conversion. Its junction temperature rating of 200 °C and storage range from −65 °C to +200 °C support operation in harsh industrial environments.
The device exhibits defined electrical behavior under standardized test conditions: trr measured at IF = 10 mA → IR = 60 mA, RL = 100 Ω, IR sampling at 1 mA; VF specified at IF = 10 mA; IR tested at VR = 20 V (25 nA max) and VR = 20 V @ 150 °C (50 µA max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| trr | 4 ns - enables reliable operation in >100 MHz switching applications without tail current delay |
| VR(RM) | 75 V - supports use in 48 V and 60 V nominal systems with safety margin |
| IF(RM) | 450 mA - sufficient for reed relay coil suppression and logic-level signal clamping |
| Cd | 4 pF at 0 V - minimizes signal distortion in RF and high-speed digital interface paths |
| VF | 1000 mV at 10 mA - ensures low forward drop in low-current sensing and protection roles |
| Rth j-a | 350 K/W - requires PCB layout consideration for thermal management at sustained 200 mA loads |
Pinout & Package
Hermetically sealed leaded glass SOD68 (DO-34) package: axial leads, cylindrical glass body (3.04 mm max diameter, 25.4 mm min length), cathode band marked on glass envelope.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential side in clamping or freewheeling configurations |
| Cathode (band-marked end) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail or signal line requiring protection from negative transients |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or outdoor deployments |
| 4 ns reverse recovery | Reduces switching losses and EMI generation in high-frequency relay drive and pulse shaping circuits |
| 75 V reverse standoff | Provides robust protection against inductive kickback from 48 V solenoids and telecom relays |
| 4 pF junction capacitance | Maintains signal integrity in <100 MHz analog and digital signal path applications |
Applications
| Reed Relay Protection | High-Speed Logic Clamping |
|---|---|
Use Scenario: Suppresses inductive flyback voltage spikes generated when de-energizing reed relay coils in telecom switching matrices. IC Role / Device Role / Timing Role: Discrete clamp diode placed across coil terminals to divert reverse EMF within 4 ns. Use Value: Prevents contact arcing and extends relay mechanical life by limiting Vpk to ≤75 V. | Use Scenario: Limits voltage excursions on TTL/CMOS data lines exposed to ESD or crosstalk in backplane interconnects. IC Role / Device Role / Timing Role: Fast-acting shunt element that conducts only during overvoltage events exceeding VCC + 0.7 V. Use Value: Preserves signal edge fidelity with <4 pF loading and sub-ns turn-on latency. |
| RF Signal Routing | Pulse Width Modulation (PWM) Feedback |
Use Scenario: Used in PIN diode-style RF switch topologies for antenna diversity selection in 900 MHz ISM-band receivers. IC Role / Device Role / Timing Role: High-isolation, low-Cd series switching element controlled by DC bias. Use Value: Achieves >25 dB isolation at 900 MHz due to 4 pF capacitance and low forward resistance. | Use Scenario: Rectifies feedback pulses from current-sense transformers in isolated DC-DC converter control loops. IC Role / Device Role / Timing Role: Fast-recovery rectifier converting AC-coupled PWM edges into clean DC error signals. Use Value: Accurate duty-cycle tracking enabled by consistent 4 ns trr across temperature and load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS16,115 | Lower VR(RM) (80 V), faster trr (4 ns same), higher IF(RM) (215 mA), SOT23 package | SMT-only; unsuitable for through-hole reed relay boards | Select if board space is constrained and SMT assembly is available |
| 1N4148W,115 | Same VR(RM) (100 V), slightly slower trr (4 ns typical but 6 ns max), identical DO-34 package | Higher leakage (25 nA @ 20 V same, but 100 nA @ 75 V) | Select if higher reverse voltage margin is required and leakage sensitivity is low |
Compared with 1N4531,143, BAS16,115 offers superior power density but lacks axial-leaded compatibility, while 1N4148W,115 provides broader voltage headroom at the cost of elevated leakage in high-temperature operation.
Availability
1N4531,143 is available at Aetrix Electronics and suitable for reed relay protection, high-speed logic clamping, and RF signal routing requiring stable component supply and long-lifecycle support.
Supply support for 1N4531,143 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.
The 1N4531,143 belongs to Nexperia's legacy high-speed diode product line, engineered specifically for low-capacitance, fast-recovery signal integrity in electromechanical interface and transient protection applications.
FAQ
What is the maximum continuous forward current for 1N4531,143 at 70 °C ambient?
At 70 °C ambient temperature, the maximum continuous forward current is derated to approximately 120 mA, based on the linear derating curve in Figure 2 of the datasheet, which shows 200 mA at 25 °C and zero current at ~155 °C. This reflects thermal limits imposed by the 350 K/W junction-to-ambient resistance and 500 mW total power dissipation rating.
Is 1N4531,143 suitable for use in automotive under-hood applications?
No - while its junction temperature rating reaches 200 °C, the device lacks AEC-Q101 qualification, has no guaranteed performance over automotive temperature ranges (−40 °C to +150 °C), and was not characterized for vibration, humidity, or lifetime reliability per automotive standards. It is intended for industrial and commercial equipment only.
How does reverse recovery time vary with temperature?
trr increases with junction temperature: the datasheet specifies 4 ns at Tj = 25 °C, but no upper limit is given at elevated temperatures. Based on typical silicon diode behavior and thermal characteristics, trr may increase by ~10–15% at 125 °C, though exact values require measurement under application-specific conditions.
Can 1N4531,143 replace 1N4148 in existing designs?
Yes, with verification - both share DO-34 packaging and similar trr (4 ns vs. 4 ns typ), but 1N4531,143 has lower VR(RM) (75 V vs. 100 V) and higher IF(RM) (450 mA vs. 300 mA). Designers must confirm reverse voltage stress remains below 75 V and that 4 pF capacitance meets signal integrity requirements.
1N4531,143 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AG, DO-34, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 25 nA @ 20 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-34
- Operating Temperature - Junction:
- 200°C (Max)
1N4531,143 FAQ
1.How can I place an order for 1N4531,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4531,143 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 1N4531,143 reliable?
The price and inventory of 1N4531,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4531,143 is usually 5 days.
3.What payment methods are accepted for 1N4531,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4531,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4531,143?
1N4531,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4531,143 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 1N4531,143?
For technical support, including 1N4531,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4531,143 requirements.
6.How does Aetrix verify that 1N4531,143 is sourced from the original manufacturer or authorized distributors?
All 1N4531,143 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 1N4531,143 meets industry standards.
7.What is the process for return or replacement of 1N4531,143?
All 1N4531,143 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4531,143, 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 1N4531,143 part is unused and in its original packaging.
Return procedure for 1N4531,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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