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Vishay General Semiconductor - Diodes Division P4SMA120A-E3/5A
- Part No.:
- P4SMA120A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120A-E3/5A.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,750
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Product details
Overview
P4SMA120A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 120 V standoff voltage (VWM), 114–126 V breakdown voltage (VBR) at 1 mA, 165 V maximum clamping voltage (VC) at 1.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P4SMA120A-E3/5A datasheet, P4SMA120A-E3/5A pinout, P4SMA120A-E3/5A application, or P4SMA120A-E3/5A equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 102 V, -65 °C to +150 °C operating temperature range, AEC-Q101 qualification eligibility (via HE3/HM3 variants), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The P4SMA120A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (114–126 V). Its glass-passivated junction ensures stable clamping performance under repetitive surge conditions, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
It delivers 400 W peak pulse power (10/1000 µs) up to 91 V; above that, derated to 300 W - confirmed by Fig. 2 in the datasheet. The device meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and exhibits 0.107 %/°C temperature coefficient of VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - precise avalanche initiation range; determines minimum overvoltage triggering point |
| VC (Clamping Voltage) | 165 V at 1.8 A IPPM - peak voltage seen by protected circuit during transient; critical for downstream component survivability |
| PPPM (Peak Pulse Power) | 400 W (≤91 V), 300 W (>91 V) - energy-handling capacity under standardized 10/1000 µs surge; sets protection robustness level |
| ID (Reverse Leakage) | 1.0 µA max at VWM - low leakage preserves system efficiency and avoids false triggers in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive or high-temperature industrial environments |
| Package | SMA (DO-214AC) - industry-standard SMT outline with 5.0 mm × 5.0 mm copper pad requirement for thermal management |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity marked with cathode band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 120 V rail); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables reliable suppression of IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 120 V DC lines without degradation |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn effect or interfacial delamination |
| AEC-Q101 qualification option (HE3/HM3) | Validates reliability for automotive powertrain and body electronics applications requiring zero-defect robustness |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns), improving protection fidelity for sensitive ICs |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 120 V DC input rails in programmable logic controller (PLC) power stages against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across input capacitor to limit transient voltage to ≤165 V. Use Value: Prevents damage to upstream rectifiers and downstream DC-DC controllers during 100 V/50 ms load dump events per ISO 7637-2. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins in BCM modules exposed to battery voltage transients. IC Role / Device Role / Timing Role: Standoff-clamp protector on 12 V supply line feeding LIN PHY, triggered within <1 ns of overvoltage onset. Use Value: Maintains functional safety integrity by limiting supply rail excursions to <165 V during jump-start or alternator regulation faults. |
| Telecom Remote Radio Unit (RRU) | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding Ethernet PHY power inputs in outdoor RRU enclosures subjected to lightning-induced surges on PoE+ lines. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V bias rail, coordinated with primary GDT-based protection. Use Value: Provides sub-200 V clamping to preserve 50 V-rated DC-DC converters and Ethernet magnetics insulation integrity. |
Use Scenario: Protecting gate drivers and MCU reset lines in washing machine motor control boards from brush-commutator noise. IC Role / Device Role / Timing Role: Localized clamping device on 12 V logic rail adjacent to triac driver ICs. Use Value: Eliminates MCU resets caused by 150 V/100 ns commutation spikes, improving field failure rate by >99.5 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 165 V VC at 2.7 A | Better suited for higher-energy surges but requires larger PCB footprint and different pad layout | Select when surge energy exceeds 400 W and board space allows SMB footprint |
| 1.5SMC120A | Same 120 V VWM, but 1500 W PPPM; DO-214AB package; 193 V VC at 7.8 A | Designed for primary-level protection; higher clamping voltage reduces system-level coordination margin | Choose for front-end surge suppression where 193 V clamping is acceptable and thermal mass permits |
Compared with SMBJ120A and 1.5SMC120A, the P4SMA120A-E3/5A offers optimal balance of compact SMA footprint, 400 W capability, and 165 V clamping - making it ideal for space-constrained secondary protection where precise voltage limiting is critical.
Availability
P4SMA120A-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom infrastructure, and consumer appliance designs requiring stable component supply with RoHS-compliant, commercial-grade reliability.
Supply support for P4SMA120A-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, and protection devices with emphasis on reliability, precision, and high-volume manufacturability.
The P4SMA Series targets cost-sensitive, high-reliability transient suppression in automotive, industrial, and telecom applications - engineered for automated SMT assembly and validated under AEC-Q101 for mission-critical use cases.
FAQ
What is the maximum clamping voltage of the P4SMA120A-E3/5A under standard test conditions?
The P4SMA120A-E3/5A has a maximum clamping voltage (VC) of 165 V at 1.8 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay datasheet (Document Number: 88367) and defines the upper voltage limit imposed on protected circuits during transient events. The P4SMA120A-E3/5A maintains this clamping performance across its full operating temperature range.
Is the P4SMA120A-E3/5A suitable for automotive applications?
The P4SMA120A-E3/5A itself is a commercial-grade part (E3 suffix), but Vishay offers AEC-Q101 qualified variants under HE3 and HM3 suffixes (e.g., P4SMA120AHE3_A). While the P4SMA120A-E3/5A meets MSL Level 1 and 260 °C reflow requirements, full automotive qualification requires the HE3/HM3 versions. The P4SMA120A-E3/5A remains widely used in non-safety-critical automotive subsystems where commercial-grade reliability suffices.
What is the reverse leakage current specification for the P4SMA120A-E3/5A at its standoff voltage?
The P4SMA120A-E3/5A specifies a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 102 V, tested at 25 °C. This low leakage ensures minimal power loss in standby mode and avoids interference with high-impedance sensing circuits. The P4SMA120A-E3/5A maintains this specification across its full -65 °C to +150 °C operating junction temperature range, with leakage increasing predictably per datasheet curves.
How does the P4SMA120A-E3/5A differ from bidirectional TVS diodes like P4SMA120CA?
The P4SMA120A-E3/5A is unidirectional and conducts only in reverse bias above VBR, while P4SMA120CA is bidirectional and clamps symmetrically in both polarities. The P4SMA120A-E3/5A has a cathode band marking and is intended for DC line protection with defined polarity; P4SMA120CA lacks polarity marking and suits AC or floating signal lines. Their electrical specs (VWM, VBR, VC) differ accordingly - the P4SMA120A-E3/5A uses 102 V VWM, whereas P4SMA120CA uses 102 V VWM per direction.
What PCB pad layout is required to achieve the rated 400 W peak pulse power for the P4SMA120A-E3/5A?
To achieve the full 400 W peak pulse power rating, the P4SMA120A-E3/5A must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Maximum Ratings table. Smaller pads reduce thermal dissipation and cause derating per Figure 2 in the datasheet. The P4SMA120A-E3/5A's thermal resistance (RθJA = 120 °C/W) assumes this layout - using smaller pads increases junction temperature and risks premature failure during repetitive surges.
P4SMA120A-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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 1.8A
- Power - Peak Pulse:
- 300W
- 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)
P4SMA120A-E3/5A FAQ
1.How can I place an order for P4SMA120A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120A-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 P4SMA120A-E3/5A reliable?
The price and inventory of P4SMA120A-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 P4SMA120A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA120A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120A-E3/5A?
P4SMA120A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120A-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 P4SMA120A-E3/5A?
For technical support, including P4SMA120A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120A-E3/5A requirements.
6.How does Aetrix verify that P4SMA120A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA120A-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 P4SMA120A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA120A-E3/5A?
All P4SMA120A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120A-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 P4SMA120A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA120A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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