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Vishay General Semiconductor - Diodes Division P4SMA18CAHE3/61
- Part No.:
- P4SMA18CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA18CAHE3/61.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA18CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 15.3 V standoff voltage (VWM), 18.9 V maximum breakdown voltage (VBR), 25.2 V clamping voltage at 15.9 A peak pulse current (IPPM), and 400 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the P4SMA18CAHE3/61 datasheet, P4SMA18CAHE3/61 pinout, P4SMA18CAHE3/61 application, or P4SMA18CAHE3/61 equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, 120 °C/W junction-to-ambient thermal resistance, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical bidirectional conduction - no polarity marking required. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
Rated for -65 °C to +150 °C operating junction temperature, it delivers 400 W peak pulse power below 91 V (derated to 300 W above), with thermal performance defined by RθJA = 120 °C/W and RθJL = 30 °C/W - validated under JEDEC J-STD-020 MSL Level 1 reflow conditions (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - guaranteed avalanche conduction onset range for bidirectional operation |
| VC (Clamping Voltage) | 25.2 V at 15.9 A IPPM - peak line voltage seen by protected circuit during 10/1000 µs transient |
| PPPM (Peak Pulse Power) | 400 W - transient energy absorption capacity with 10/1000 µs waveform at TA = 25 °C |
| ID (Reverse Leakage) | 1.0 µA max at VWM - minimal standby current draw preserving signal integrity in high-impedance circuits |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - qualified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating and matte tin-plated leads solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No physical marking; symmetric terminals enable orientation-agnostic PCB layout |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | No band or marking - bidirectional operation eliminates polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V power rails when mounted on 5.0 mm × 5.0 mm pads |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring long-term field reliability |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to limit transient voltage before reaching MCU input pins. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs during ISO 7637-2 pulse 5a (110 V/500 ms) events. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: Primary transient suppressor across input terminals, coordinated with series current-limiting resistor. Use Value: Limits clamped voltage to 25.2 V, ensuring safe operation of optocoupler input stages rated for 30 V max reverse voltage. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Board |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against lightning-induced surges on building-wide data cabling. IC Role / Device Role / Timing Role: First-stage protection device on differential pair, preceding gas discharge tube or polymer PTC secondary protection. Use Value: Responds within <1 ns to clamp 1 kV/500 A transients to ≤25.2 V, preserving signal integrity and preventing transceiver latch-up. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to shunt inductive energy back into supply rail during MOSFET turn-off. Use Value: Absorbs 400 W peak pulses without degradation, extending MOSFET lifetime and eliminating need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 28.5 V VC at 21.2 A IPPM | Better suited for higher-energy transients but requires larger board area and has higher parasitic inductance | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and PCB space allows SMB footprint |
| 1.5KE18CA | Through-hole TO-218 package; 1500 W PPPM; 28.5 V VC at 53 A IPPM; higher thermal mass | Used in legacy industrial power supplies where manual assembly or high-reliability through-hole mounting is mandated | Choose for retrofit designs or applications requiring >1000 W surge handling and mechanical robustness over SMT density |
Compared with SMBJ18CA and 1.5KE18CA, P4SMA18CAHE3/61 offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and sufficient 400 W surge rating for cost-sensitive automotive and industrial edge nodes - without sacrificing reflow compatibility or leakage performance.
Availability
P4SMA18CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer appliance motor controls requiring stable component supply and long-term lifecycle support.
Supply support for P4SMA18CAHE3/61 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed for high-volume surface-mount transient suppression in automotive, industrial, and communications equipment - prioritizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of P4SMA18CAHE3/61 at its rated peak pulse current?
The P4SMA18CAHE3/61 has a maximum clamping voltage (VC) of 25.2 V at 15.9 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Vishay specification 88367. The clamping voltage defines the upper voltage limit imposed on protected circuitry during transient events, making it critical for ensuring downstream ICs remain within absolute maximum ratings. P4SMA18CAHE3/61 maintains this performance across its full operating temperature range.
Is P4SMA18CAHE3/61 suitable for automotive applications?
Yes, P4SMA18CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HE3. It undergoes stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT) per AEC-Q101 Rev D. Its -65 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and RoHS-compliant matte tin plating meet automotive manufacturing and under-hood environmental requirements. P4SMA18CAHE3/61 is commonly deployed in body control modules, sensor hubs, and infotainment power rails.
How does the bidirectional design of P4SMA18CAHE3/61 affect PCB layout?
The bidirectional design of P4SMA18CAHE3/61 eliminates polarity constraints - there is no cathode band or marking, and both terminals are functionally identical. This allows unrestricted orientation during automated placement and simplifies routing on dense PCBs, especially for differential or AC-coupled signals like RS-485, CAN, or audio lines. Layout only requires symmetric 5.0 mm × 5.0 mm copper pads per terminal to maintain specified thermal and surge performance. P4SMA18CAHE3/61 thus reduces design risk and assembly errors compared to unidirectional TVS diodes.
What is the maximum reverse leakage current for P4SMA18CAHE3/61 at its standoff voltage?
The maximum reverse leakage current (ID) for P4SMA18CAHE3/61 is 1.0 µA at its 15.3 V standoff voltage (VWM), tested at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor front-ends and battery-powered systems where standby current must be minimized. The value remains stable over temperature due to the device's glass-passivated junction construction. P4SMA18CAHE3/61 achieves this while maintaining tight VBR tolerance (17.1–18.9 V), supporting precision protection in noise-sensitive analog circuits.
Does P4SMA18CAHE3/61 require derating above ambient temperature?
Yes, P4SMA18CAHE3/61 requires thermal derating above TA = 25 °C, as shown in Figure 2 of Vishay document 88367. Its peak pulse power (PPPM) decreases linearly: at 75 °C ambient, PPPM is reduced to approximately 280 W; at 125 °C, it drops to ~160 W. Derating is based on RθJA = 120 °C/W and must be applied when calculating worst-case surge margin in enclosed or high-temperature environments. P4SMA18CAHE3/61 retains full functionality up to TJ = 150 °C, but sustained operation near that limit requires careful thermal design using recommended pad layouts.
P4SMA18CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA18CAHE3/61 FAQ
1.How can I place an order for P4SMA18CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA18CAHE3/61 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 P4SMA18CAHE3/61 reliable?
The price and inventory of P4SMA18CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA18CAHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA18CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA18CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA18CAHE3/61?
P4SMA18CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA18CAHE3/61 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 P4SMA18CAHE3/61?
For technical support, including P4SMA18CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA18CAHE3/61 requirements.
6.How does Aetrix verify that P4SMA18CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA18CAHE3/61 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 P4SMA18CAHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA18CAHE3/61?
All P4SMA18CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA18CAHE3/61, 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 P4SMA18CAHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA18CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA18CAHE3/61 Tags
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