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Vishay General Semiconductor - Diodes Division P4SMA120AHM3_A/H
- Part No.:
- P4SMA120AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120AHM3_A/H.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,761
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Product details
Overview
P4SMA120AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 120 V breakdown voltage (VBR = 114–126 V at IT = 1.0 mA), 165 V maximum clamping voltage (VC) at 1.8 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform). It protects MOSFETs and ICs against inductive switching transients in automotive power electronics.
For engineers reviewing the P4SMA120AHM3_A/H datasheet, P4SMA120AHM3_A/H pinout, P4SMA120AHM3_A/H application, or P4SMA120AHM3_A/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for automotive-grade ESD and load-dump protection design validation.
Technical Context
The P4SMA120AHM3_A/H operates as a unidirectional avalanche diode with cathode-band polarity marking, leveraging glass-passivated junction technology for stable reverse breakdown and low incremental surge resistance. Its thermal resistance (RθJA = 120 °C/W) and junction temperature limit (TJ = 150 °C) are defined for mounting on 0.2" × 0.2" copper pads per JEDEC standards.
It meets UL 497B recognition (QVGQ2) and supports bidirectional variants via CA suffix (e.g., P4SMA120CA), but P4SMA120AHM3_A/H itself is strictly unidirectional. Clamping behavior is characterized at IPPM = 1.8 A with VC ≤ 165 V, and leakage current is limited to 1.0 µA at VWM = 102 V - confirming tight stand-off margin for 100 V nominal rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V / 126 V at IT = 1.0 mA - defines reliable avalanche initiation threshold across production lot |
| VWM | 102 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 165 V at 1.8 A (10/1000 µs) - clamping voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W - peak transient power handling capability under standard lightning-surge waveform |
| IPPM | 1.8 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJ max. | 150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 120 °C/W - thermal resistance used to calculate junction temperature rise under DC power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Avalanche breakdown terminal | Connected to protected line (e.g., 12 V battery rail); band-marked end absorbs positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern vehicle manufacturing and recycling |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| 400 W peak pulse power (10/1000 µs) | Robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response time implied) |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V power rails in junction boxes and fuse panels against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and downstream DC-DC converters or microcontrollers. Use Value: Clamps transients up to 165 V while maintaining 102 V stand-off, preventing latch-up or gate oxide damage in protected ICs. |
Use Scenario: Input-stage surge suppression on AC/DC rectifier outputs feeding variable-frequency drives. IC Role / Device Role / Timing Role: Standoff diode absorbing inductive kickback from contactor coils and relay drivers. Use Value: Limits voltage overshoot to 165 V during 1.8 A surge events, preserving IGBT gate driver integrity and reducing snubber losses. |
| Telecom Power Supply Inputs | Automotive Sensor Signal Lines |
Use Scenario: Secondary-side overvoltage protection on telecom -48 V DC power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, placed after bulk filter capacitors. Use Value: Maintains 102 V working voltage margin above nominal -48 V rail while clamping to 165 V during 10/1000 µs events. |
Use Scenario: CAN/LIN bus line protection in automotive cabin modules subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 30 pF typical at VWM) placed inline with signal traces. Use Value: Provides sub-1 ns response with <1 µA leakage at 102 V, ensuring signal integrity and EMC compliance without loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120AHE3/A | Same VBR range (114–126 V), identical SMA package, but rated for 400 W only up to 85 V; 300 W above 91 V - lower peak power at same voltage | Less suitable for high-energy load-dump scenarios where full 400 W rating is required at 120 V | Select P4SMA120AHM3_A/H when full 400 W rating must be maintained at VBR ≥ 120 V |
| 1.5SMC120A | Higher package thermal mass (SMC/DO-214AB), 1500 W rating, but larger footprint and higher RθJA (60 °C/W) - different layout and thermal management needs | Used where PCB space allows larger devices and higher single-pulse energy absorption is prioritized over compactness | Choose P4SMA120AHM3_A/H for space-constrained automotive modules requiring AEC-Q101 + halogen-free in SMA form factor |
Compared with SMAJ120AHE3/A, P4SMA120AHM3_A/H sustains full 400 W rating at 120 V, not derated; versus 1.5SMC120A, it offers AEC-Q101 qualification, halogen-free construction, and smaller SMA footprint - making it optimal for modern automotive ECUs where size, compliance, and consistent high-voltage surge rating are jointly critical.
Availability
P4SMA120AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom power supply inputs, and automotive sensor signal lines requiring stable component supply with AEC-Q101 traceability and halogen-free compliance.
Supply support for P4SMA120AHM3_A/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, automotive qualification, and application-specific performance.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-reliability systems - especially automotive, industrial, and telecom infrastructure where AEC-Q101, MSL Level 1, and UL 497B recognition are mandatory.
FAQ
What is the breakdown voltage tolerance of P4SMA120AHM3_A/H?
The P4SMA120AHM3_A/H has a specified breakdown voltage range of 114 V to 126 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 120 V rating. This tight VBR window ensures predictable clamping onset across temperature and production lots, critical for protecting 100 V-class circuits without premature conduction.
Is P4SMA120AHM3_A/H suitable for bidirectional transient protection?
No, P4SMA120AHM3_A/H is a unidirectional TVS diode, identified by its cathode band marking and specified electrical characteristics for single-polarity surge suppression. For bidirectional protection, Vishay offers the P4SMA120CA variant; using P4SMA120AHM3_A/H in bidirectional applications would result in forward conduction during negative transients and potential failure.
Does P4SMA120AHM3_A/H meet automotive qualification standards?
Yes, P4SMA120AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024, Doc. #88367). This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock - validating suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of P4SMA120AHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA120AHM3_A/H is 165 V at peak pulse current IPPM = 1.8 A with a 10/1000 µs waveform. This value is measured under standardized test conditions (mounted on 0.2" × 0.2" copper pads) and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the halogen-free construction of P4SMA120AHM3_A/H impact board assembly?
The halogen-free molding compound in P4SMA120AHM3_A/H complies with IPC-4101D and JEDEC J-STD-020 MSL Level 1 requirements, allowing direct use in lead-free reflow processes peaking at 260 °C without delamination or popcorning. No special handling, baking, or process adjustments are needed beyond standard SMA package guidelines.
P4SMA120AHM3_A/H 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:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA120AHM3_A/H FAQ
1.How can I place an order for P4SMA120AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120AHM3_A/H 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 P4SMA120AHM3_A/H reliable?
The price and inventory of P4SMA120AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA120AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120AHM3_A/H?
P4SMA120AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120AHM3_A/H 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 P4SMA120AHM3_A/H?
For technical support, including P4SMA120AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA120AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA120AHM3_A/H 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 P4SMA120AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA120AHM3_A/H?
All P4SMA120AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120AHM3_A/H, 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 P4SMA120AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA120AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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