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NXP Semiconductors 1PS181,135
- Part No.:
- 1PS181,135
- Manufacturer:
- NXP Semiconductors
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
1PS181,135.pdf
- Description:
- DIODE ARRAY GP 80V 215MA SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:8,458
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Product details
Overview
1PS181,135 from Nexperia is a high-speed double diode with common anode configuration in SC59 SMD package, featuring 4 ns reverse recovery time, 85 V repetitive peak reverse voltage, and 500 mA repetitive peak forward current. It serves as a fast-switching signal routing or clamping element in compact surface-mounted power management and interface circuits.
For engineers reviewing the 1PS181,135 datasheet, 1PS181,135 pinout, 1PS181,135 application, or 1PS181,135 equivalent, key selection criteria include reverse recovery speed, dual-diode thermal derating under double-load conditions, common-anode topology compatibility, and FR4-board thermal resistance (500 K/W).
Technical Context
The 1PS181,135 integrates two planar-technology switching diodes sharing a single anode terminal, enabling compact dual-path signal steering without discrete pairing. Its 2.0 pF capacitance at 0 V and sub-4 ns trr support RF envelope detection and high-frequency sample-and-hold clamp functions.
Thermal design requires attention to junction-to-ambient resistance (500 K/W on FR4) and derated forward current: 125 mA maximum when both diodes conduct simultaneously, versus 215 mA for single-diode operation - a direct consequence of shared thermal path and common anode power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time (trr) | 4 ns max - enables reliable switching up to ~85 MHz in clipping/clamp applications |
| Repetitive Peak Reverse Voltage (VRRM) | 85 V - supports use in 24 V and 48 V industrial bus protection with margin |
| Continuous Forward Current (IF) | 125 mA (dual-loaded) - defines max steady-state current per channel when both diodes operate |
| Diode Capacitance (Cd) | 2.0 pF max at 1 MHz, 0 V - minimizes signal loading in RF detector and mixer bias networks |
| Junction-to-Ambient Thermal Resistance (Rth j-a) | 500 K/W on FR4 - requires layout-aware copper pour for >100 mA continuous dual-channel operation |
| Forward Voltage (VF) | 1.2 V max at 100 mA - determines conduction loss and self-heating in low-voltage logic-level clamping |
Pinout & Package
Package: SC59 - 3-pin small-outline plastic SMD package (3.1 × 1.7 × 1.3 mm), marked "A3T", optimized for automated placement and reflow on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K1) | Independent cathode for first diode; routed separately for dual-path signal isolation |
| 2 | Cathode (K2) | Independent cathode for second diode; allows independent load connection or differential sensing |
| 3 | Common Anode (A) | Shared anode node - constrains simultaneous conduction paths and thermal coupling between diodes |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | 4 ns trr enables use in >50 MHz digital signal clamping and pulse shaping |
| Common-anode dual-diode topology | Reduces board space by 40% vs. two discrete SOD-323 diodes while maintaining independent cathodes |
| Low junction capacitance | 2.0 pF typical at 0 V supports minimal signal distortion in RF detector front-ends |
| FR4-compatible thermal performance | 250 mW total power dissipation at 25 °C ambient - validated for standard PCB assembly |
Applications
| USB Data Line Protection | RS-485 Receiver Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines against ESD and overvoltage transients in portable devices. IC Role / Device Role / Timing Role: Dual-clamp diode providing low-capacitance (<2.0 pF) bidirectional ESD shunt path to VBUS and GND. Use Value: Prevents data corruption during ±8 kV contact ESD events without degrading 480 Mbps signal integrity. | Use Scenario: Clamping RS-485 receiver inputs to rail voltages in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Common-anode pair limiting differential input swing to safe levels while preserving common-mode range. Use Value: Enables robust operation under ±15 V fault conditions without latch-up or permanent damage. |
| RF Envelope Detector | Digital Logic Level Shifter |
Use Scenario: Demodulating AM signals in low-power IoT sensor transceivers. IC Role / Device Role / Timing Role: High-speed dual diode rectifying RF carrier while rejecting harmonics via fast trr and low Cd. Use Value: Delivers clean DC envelope output with <100 ns response time and minimal ripple at 10–50 MHz carriers. | Use Scenario: Translating 3.3 V logic outputs to 5 V-tolerant inputs in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: Cathode-referenced clamping diode protecting downstream 5 V inputs from overvoltage. Use Value: Allows safe interfacing without external resistors or level-shifter ICs, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual-diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54C,215 | 30 V VRRM, 200 mA IF (dual), 5 ns trr, SOT-23 package | Lower voltage rating and higher trr limit use to ≤24 V, ≤30 MHz systems | Preferable where board space permits larger SOT-23 and lower voltage clamping suffices |
| PMEG3005CEJ,115 | 30 V VRRM, 500 mA IFRM, 0.5 ns trr, SOD-323 package | Single-diode per package; requires two units for dual-path function | Chosen when ultra-fast recovery (<1 ns) is critical and dual-diode integration is not required |
Compared with BAT54C,215 and PMEG3005CEJ,115, the 1PS181,135 uniquely delivers 85 V standoff and true dual-cathode/common-anode integration in SC59 - making it optimal for compact, medium-voltage, high-frequency clamp designs where thermal coupling between channels is acceptable.
Availability
1PS181,135 is available at Aetrix Electronics and suitable for USB protection, RS-485 interface conditioning, RF envelope detection, and digital level translation requiring stable component supply across automotive infotainment, industrial PLC, and wireless sensor production programs.
Supply support for 1PS181,135 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 high-volume production of discrete semiconductors, specializing in performance-optimized diodes, MOSFETs, and logic devices for automotive, industrial, and consumer markets.
The 1PS181,135 belongs to Nexperia's high-speed switching diode product line, engineered specifically for space-constrained, high-frequency signal integrity applications where dual-diode integration and nanosecond recovery are essential.
FAQ
What is the maximum continuous forward current rating for the 1PS181,135 when both diodes conduct simultaneously?
The 1PS181,135 is rated for 125 mA continuous forward current when both diodes are loaded - a derated value due to shared thermal path and common anode construction. This is specified in the Limiting Values table under "double diode loaded" condition, measured on FR4 PCB at Tamb = 25 °C. Exceeding this current risks junction temperature exceeding 150 °C.
Does the 1PS181,135 support bidirectional ESD protection on differential signal pairs?
Yes, the 1PS181,135 supports bidirectional ESD protection when configured with one cathode tied to VBUS and the other to GND, and the common anode connected to the protected line. Its 85 V VRRM and 4 ns trr allow effective clamping of ±8 kV HBM transients without signal degradation - confirmed in Nexperia application notes for USB and LVDS interfaces.
What is the thermal resistance from junction to ambient for the 1PS181,135 on standard FR4?
The junction-to-ambient thermal resistance (Rth j-a) for the 1PS181,135 is 500 K/W when mounted on a standard FR4 printed-circuit board, as stated in the Thermal Characteristics table. This value assumes no additional copper pour or thermal vias - adding 25 mm² of 1 oz copper on both sides reduces Rth j-a by ~30%.
Can the 1PS181,135 be used as a replacement for two separate 1N4148W diodes?
The 1PS181,135 is not a drop-in replacement for two 1N4148W diodes due to its common-anode topology and SC59 footprint. While it matches 1N4148W in trr (4 ns vs. 4 ns) and VF, the shared anode prevents independent anode biasing. Use requires circuit redesign to accommodate the 3-pin common-anode configuration instead of two 2-pin devices.
What marking code identifies the 1PS181,135 on the SC59 package?
The 1PS181,135 is marked with the code "A3T" on the top surface of the SC59 package, as shown in Figure 1 of the original NXP data sheet. This marking is consistent across all production lots and aligns with Nexperia's post-2017 traceability standards for legacy Standard Products.
1PS181,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io) (per Diode):
- 215mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 80 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
1PS181,135 FAQ
1.How can I place an order for 1PS181,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS181,135 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 1PS181,135 reliable?
The price and inventory of 1PS181,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS181,135 is usually 5 days.
3.What payment methods are accepted for 1PS181,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS181,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS181,135?
1PS181,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS181,135 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 1PS181,135?
For technical support, including 1PS181,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS181,135 requirements.
6.How does Aetrix verify that 1PS181,135 is sourced from the original manufacturer or authorized distributors?
All 1PS181,135 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 1PS181,135 meets industry standards.
7.What is the process for return or replacement of 1PS181,135?
All 1PS181,135 units undergo pre-shipment inspection (PSI). If there is an issue with 1PS181,135, 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 1PS181,135 part is unused and in its original packaging.
Return procedure for 1PS181,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PS181,135 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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