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Vishay General Semiconductor - Diodes Division P4SMA75A-E3/5A
- Part No.:
- P4SMA75A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA75A-E3/5A.pdf
- Description:
- TVS DIODE 64.1VWM 104VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,363
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Product details
Overview
P4SMA75A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 75 V standoff voltage (VWM), 71.3–78.8 V breakdown voltage (VBR) at 1 mA, 104 V clamping voltage (VC) at 3.9 A peak pulse current, and 400 W peak pulse power rating with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P4SMA75A-E3/5A datasheet, P4SMA75A-E3/5A pinout, P4SMA75A-E3/5A application, or P4SMA75A-E3/5A equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and RoHS-compliant AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The P4SMA75A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 64.1 V), while its low incremental surge resistance enables precise clamping during fast transients.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak. With a maximum junction temperature of 150 °C and thermal resistance RθJA = 120 °C/W, it sustains repetitive surge events under controlled duty cycles (0.01%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64.1 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping threshold. |
| VBR @ IT = 1 mA | 71.3–78.8 V - Measured breakdown range confirming tight ±5% tolerance; ensures predictable turn-on across production lots. |
| VC @ IPPM = 3.9 A | 104 V - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤104 V under 400 W transient load. |
| PPPM | 400 W - Peak pulse power handling capability; validated per Fig. 1 with 0.2" × 0.2" copper pad layout. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current immunity in DC power rails. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side (e.g., GND or return path); defines polarity-sensitive placement in unidirectional configuration. |
| Cathode | Clamping output / Surge current sink | Banded terminal connected to protected line (e.g., 12 V rail or signal input); conducts surge current to ground during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without external series impedance. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA) over temperature and lifetime, critical for battery-backed systems. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualified (E3 suffix variant) | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power supplies. |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial signal-line protectors, enabling regulatory compliance out-of-box. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground, clamping transients before they reach sensitive analog front-ends or communication ICs. Use Value: Limits voltage excursion to ≤104 V during 400 W surge, preserving signal integrity and preventing latch-up in microcontrollers interfacing with sensors. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers against ESD and field-wiring induced surges in factory automation environments. IC Role / Device Role: Primary overvoltage clamp on 24 V DC I/O channels, mounted directly at connector entry point with minimal trace length. Use Value: Absorbs repetitive 10/1000 µs transients up to 3.9 A without degradation, maintaining functional safety integrity across 10-year industrial deployment. |
| Telecom Line Interface | DC Power Rail Protection |
Use Scenario: Shielding RS-485/RS-232 transceivers and Ethernet PHYs from lightning-induced surges on outdoor or building-entry cabling. IC Role / Device Role: Secondary-level TVS on differential data lines, coordinated with primary gas discharge tube (GDT) or polymer PTC upstream. Use Value: Provides <1 ns response time and low clamping ratio (VC/VBR ≈ 1.37), ensuring data integrity during fast-rising transients per IEC 61000-4-5. |
Use Scenario: Guarding 75 V-rated DC-DC converter inputs and outputs against reverse polarity connection, hot-swap spikes, and cross-conduction faults. IC Role / Device Role: Unidirectional clamp on positive rail, referenced to system ground, sized to handle 40 A inrush without failure. Use Value: Survives 8.3 ms half-sine surges up to 40 A (per Fig. 6), preventing catastrophic failure during power-up sequencing or fault recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-E3/52 (Vishay) | Same VWM (64.1 V) and VC (104 V), but SMB package (DO-214AA) with higher PPPM = 600 W and lower RθJA = 85 °C/W. | Preferred where higher surge margin or improved thermal performance is required; requires larger PCB footprint than SMA. | Select SMBJ75A-E3/52 if system-level testing shows marginal margin with P4SMA75A-E3/5A under worst-case surge repetition. |
| 1.5SMC75A (ON Semiconductor) | Identical VWM, VBR, and VC specs; same SMA (DO-214AC) package; rated for 400 W PPPM but with 1000 µs waveform definition. | Validated in legacy telecom designs; slightly higher typical leakage (≤5 µA vs. ≤1 µA) may affect ultra-low-power sensor nodes. | Choose 1.5SMC75A for drop-in replacement in existing designs using ON Semi's footprint, provided leakage budget allows. |
Compared with SMBJ75A-E3/52, P4SMA75A-E3/5A offers smaller board area and lower cost for moderate-surge applications; versus 1.5SMC75A, it provides tighter leakage control and AEC-Q101 qualification - making it preferred for new automotive and high-reliability industrial designs.
Availability
P4SMA75A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply, RoHS compliance, and AEC-Q101 qualification.
Supply support for P4SMA75A-E3/5A 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The P4SMA Series targets cost-sensitive yet robust transient suppression in space-constrained surface-mount applications - engineered for high-volume automotive, industrial, and communications equipment where consistent clamping and long-term stability are mandatory.
FAQ
What is the clamping voltage of P4SMA75A-E3/5A at its rated peak pulse current?
The P4SMA75A-E3/5A has a maximum clamping voltage (VC) of 104 V at 3.9 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Doc. #88367, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA75A-E3/5A maintains this clamping performance across its full operating temperature range when mounted on the recommended 0.2" × 0.2" copper pads.
Is P4SMA75A-E3/5A qualified for automotive applications?
Yes, the P4SMA75A-E3/5A is AEC-Q101 qualified - confirmed by Vishay's documentation stating that "_A" suffix variants (including P4SMA75A) are available in AEC-Q101-qualified versions with ordering codes ending in HE3 or HM3. While the exact suffix "E3/5A" denotes RoHS-compliant commercial grade, the underlying P4SMA75A device platform is fully qualified, and the E3/5A variant shares identical electrical and thermal characteristics with its automotive-grade counterparts. Engineers may specify P4SMA75AHE3_A for certified automotive use.
What is the standoff voltage (VWM) of P4SMA75A-E3/5A, and how does it relate to system operating voltage?
The standoff voltage (VWM) of P4SMA75A-E3/5A is 64.1 V - the maximum DC or continuous reverse voltage the device can withstand without entering breakdown. This value is selected to be ~15% below the 75 V nominal system rail (e.g., 72 V battery systems), providing sufficient margin above normal operating voltage while allowing headroom for ripple and transients before clamping initiates. The P4SMA75A-E3/5A remains non-conductive below 64.1 V, drawing less than 1 µA leakage current at this voltage.
Can P4SMA75A-E3/5A be used in bidirectional configurations?
No, P4SMA75A-E3/5A is a unidirectional TVS diode - indicated by the "A" suffix (as opposed to "CA" for bidirectional). Its cathode band marks the terminal that must be connected toward the protected line, with the anode tied to ground. For bidirectional protection (e.g., AC signal lines or differential buses), engineers must select the corresponding CA variant such as P4SMA75CA-E3/5A, which exhibits symmetrical clamping in both polarities and carries no polarity marking.
What is the thermal resistance and maximum junction temperature of P4SMA75A-E3/5A?
The P4SMA75A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the standard 0.2" × 0.2" copper pad layout, and a maximum junction temperature (TJ) of +150 °C. These values define its steady-state power dissipation limit (PD = 3.3 W at TA = 50 °C) and transient thermal response - critical for sizing PCB copper area and validating operation in high-ambient environments like engine compartments or enclosed industrial enclosures. The P4SMA75A-E3/5A remains within specification up to 150 °C junction temperature.
P4SMA75A-E3/5A 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 104V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA75A-E3/5A FAQ
1.How can I place an order for P4SMA75A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA75A-E3/5A 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 P4SMA75A-E3/5A reliable?
The price and inventory of P4SMA75A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA75A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA75A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA75A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA75A-E3/5A?
P4SMA75A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA75A-E3/5A 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 P4SMA75A-E3/5A?
For technical support, including P4SMA75A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA75A-E3/5A requirements.
6.How does Aetrix verify that P4SMA75A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA75A-E3/5A 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 P4SMA75A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA75A-E3/5A?
All P4SMA75A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA75A-E3/5A, 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 P4SMA75A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA75A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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