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Vishay General Semiconductor - Diodes Division P4SMA120AHM3/I
- Part No.:
- P4SMA120AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120AHM3/I.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,046
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Product details
Overview
P4SMA120AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 120 V standoff voltage (VWM), 114–126 V breakdown voltage (VBR) at 1 mA, and 165 V clamping voltage (VC) at 1.8 A peak pulse current (IPPM), delivering 400 W peak pulse power with 10/1000 µs waveform for protecting MOSFETs and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA120AHM3/I datasheet, P4SMA120AHM3/I pinout, P4SMA120AHM3/I application, or P4SMA120AHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), clamping performance under surge conditions, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA120AHM3/I operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior and fast response to transients. Its 120 V VWM enables use on 100 V DC bus lines, while 165 V VC ensures safe voltage limiting during 1.8 A surges.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads, it meets MSL Level 1 per J-STD-020 (peak reflow 260 °C) and supports repetitive surge duty cycles up to 0.01 % - delivering 300 W peak pulse power above 91 V per specification note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 120 V - maximum continuous reverse operating voltage before clamping initiates; sets operating margin for 100 V nominal systems. |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - defined avalanche onset range; ensures predictable turn-on within ±5 % tolerance. |
| VC (Clamping Voltage) | 165 V at IPPM = 1.8 A - peak voltage seen by protected circuit during 10/1000 µs transient; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W (≤91 V), 300 W (>91 V) - energy-handling capability with standard 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surges. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - negligible standby current; avoids loading of high-impedance sensor or reference circuits. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard PCB pad; informs derating above 25 °C ambient. |
| AEC-Q101 Qualified | Yes - qualified for automotive-grade reliability per stress test requirements; supports under-hood and ADAS power rail protection. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-side return; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables single-device protection against Level 4 IEC 61000-4-5 surges (4 kV, 2 Ω source) on 100 V rails without parallel staging. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive power electronics including engine control units and battery management systems requiring extended temperature and life-cycle reliability. |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU; supports green manufacturing and end-of-life compliance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C); eliminates baking requirement prior to SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for sensitive analog front-ends. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and local regulator input. Use Value: Limits transient voltage to ≤165 V during 1.8 A surges, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors interfacing with PLC analog inputs. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on sensor output trace, mounted adjacent to connector. Use Value: Clamps ESD (IEC 61000-4-2) and inductive switching spikes to <165 V while adding only 1.0 µA leakage at 120 V, preserving signal integrity. |
| Telecom DC Power Feeds | Consumer Power Adapter Output Rails |
|
Use Scenario: Secondary-side surge suppression on -48 V telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across output capacitor to absorb lightning-induced surges. Use Value: Withstands 300 W repetitive surges above 91 V, enabling reliable operation in outdoor base station cabinets with limited heatsinking. |
Use Scenario: Overvoltage protection on 19 V output of laptop AC adapters exposed to mains transients. IC Role / Device Role / Timing Role: Unidirectional clamp between adapter output and USB-PD controller input. Use Value: 120 V VWM provides 20 % margin over nominal 19 V output; 165 V VC prevents damage to USB-C interface ICs during surge events. |
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 | Same VWM (120 V), higher IPPM (20.1 A), larger SMB (DO-214AA) package (4.58 mm × 3.94 mm vs. SMA's 4.50 mm × 2.79 mm). | Higher surge current handling but requires larger PCB footprint; not drop-in compatible due to different pad layout and thermal mass. | Select SMBJ120A only when >1.8 A peak surge immunity is required and board space permits larger package. |
| 1.5SMC120A | Same VWM and VC, but 1.5 kW peak power rating and DO-214AB (SMC) package (7.11 mm × 6.22 mm); RθJA ≈ 30 °C/W with heatsink. | Designed for higher-power industrial systems with active cooling; incompatible with standard SMA land pattern. | Choose 1.5SMC120A for fixed installations needing >400 W dissipation where thermal management infrastructure exists. |
Compared with P4SMA120AHM3/I, SMBJ120A offers greater surge current headroom in a slightly larger package, while 1.5SMC120A targets high-power applications with heatsink support - neither is pin-compatible, but all three share identical VWM/VBR/VC specifications for direct functional comparison in system-level surge analysis.
Availability
P4SMA120AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeds, and consumer adapter outputs requiring stable component supply with AEC-Q101 qualification and halogen-free compliance.
Supply support for P4SMA120AHM3/I 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 is engineered for surface-mount transient suppression in space-constrained, high-reliability environments - particularly automotive, industrial, and telecom systems where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the P4SMA120AHM3/I under a 10/1000 µs surge?
The P4SMA120AHM3/I has a maximum clamping voltage (VC) of 165 V at 1.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88367, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA120AHM3/I maintains this clamping performance across its specified operating temperature range.
Is the P4SMA120AHM3/I qualified for automotive applications?
Yes, the P4SMA120AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes stress testing per AEC-Q101 requirements including HTOL, TCT, and ESD, making it suitable for under-hood and chassis-mounted electronics. The P4SMA120AHM3/I is explicitly listed in Vishay's automotive ordering matrix for the P4SMA family.
What does the "HM3" suffix mean in P4SMA120AHM3/I?
The "HM3" suffix in P4SMA120AHM3/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. The "I" denotes 7500-unit tape-and-reel packaging on 13-inch diameter reels. This distinguishes it from commercial-grade "E3" or "M3" variants and confirms suitability for automotive and high-reliability industrial use. The P4SMA120AHM3/I meets UL 497B recognition and flammability rating UL 94 V-0.
How does the thermal performance of P4SMA120AHM3/I compare to similar TVS diodes?
The P4SMA120AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads - consistent with industry-standard SMA package performance. This value supports derating calculations for continuous power dissipation (PD = 3.3 W) and enables accurate thermal modeling in compact layouts. Unlike larger packages such as SMB or SMC, the P4SMA120AHM3/I prioritizes space savings over ultra-low RθJA.
Can the P4SMA120AHM3/I be used in bidirectional configurations?
No, the P4SMA120AHM3/I is a unidirectional TVS diode, as confirmed by its part number suffix "A" (not "CA") and cathode-band marking. Bidirectional operation requires CA-suffix variants like P4SMA120CA. Using the P4SMA120AHM3/I in reverse-biased AC applications would result in forward conduction and potential failure. Always verify polarity alignment during PCB layout - the P4SMA120AHM3/I must be oriented with the banded end toward the protected line.
P4SMA120AHM3/I 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:
- 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/I FAQ
1.How can I place an order for P4SMA120AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120AHM3/I 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/I reliable?
The price and inventory of P4SMA120AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA120AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120AHM3/I?
P4SMA120AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120AHM3/I 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/I?
For technical support, including P4SMA120AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120AHM3/I requirements.
6.How does Aetrix verify that P4SMA120AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA120AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of P4SMA120AHM3/I?
All P4SMA120AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for P4SMA120AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA120AHM3/I Tags
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