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Vishay General Semiconductor - Diodes Division P4SMA120AHM3/H
- Part No.:
- P4SMA120AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120AHM3/H.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,333
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Product details
Overview
P4SMA120AHM3/H 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), 137 V maximum clamping voltage (VC) at 1.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - suitable for protecting MOSFETs and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P4SMA120AHM3/H datasheet, P4SMA120AHM3/H pinout, P4SMA120AHM3/H application, or P4SMA120AHM3/H equivalent, this page delivers verified electrical ratings, AEC-Q101 qualification status, thermal resistance data, clamping behavior under surge conditions, and direct alternative part comparisons for robust ESD and lightning transient protection design.
Technical Context
The P4SMA120AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 114–126 V at 1 mA). Its glass-passivated junction ensures stable leakage performance (<1 µA at VWM) and fast response time (<1 ns), enabling suppression of fast-rising transients induced by inductive switching or ESD events.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, with a maximum junction temperature of 150 °C and MSL Level 1 rating (peak reflow ≤260 °C). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 165 V at IPPM = 1.8 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for downstream IC survival. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy-handling capability under standard 10/1000 µs transient; derates to 300 W above 91 V per spec. |
| ID (Reverse Leakage) | <1 µA at VWM - Minimal standby power loss and signal integrity impact in high-impedance sensing paths. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or enclosed industrial environments without thermal shutdown. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; HM3 suffix denotes compliance. |
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. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional TVS configuration; enables clamping to reference during positive transients. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply or CAN bus); conducts avalanche current when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) with appropriate series impedance. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage across temperature and humidity stress cycles. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V or 5 V logic rails. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs and switch-sense lines in BCMs against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input connector and local regulator/LDO. Use Value: Limits transient voltage to ≤165 V during 100 A/10 ms load dump events, preventing damage to MCU GPIOs and level-shifters. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input front-end, upstream of optocoupler or digital isolator. Use Value: Maintains <1 µA leakage at 24 V nominal, preserving input hysteresis thresholds while surviving repeated 1 kV/500 Ω surges. |
| Telecom Base Station Power Rail | Consumer Appliance Motor Drive Interface |
Use Scenario: Safeguarding 48 V backplane power distribution against lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-level TVS on intermediate DC-DC converter outputs feeding RF amplifiers and baseband ICs. Use Value: Clamps 400 W transients within 1 ns, limiting voltage excursion to 165 V and preserving ±5% regulation tolerance of downstream converters. |
Use Scenario: Suppressing commutation spikes on microcontroller-driven H-bridge gate drive lines in washing machine motor controls. IC Role / Device Role / Timing Role: Localized TVS on half-bridge high-side and low-side driver supply pins. Use Value: Withstands repetitive 1.8 A pulses at 0.01% duty cycle, preventing latch-up in gate drivers during brushless motor startup/stall. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A | Same VWM (102 V), VC = 165 V, but rated at 400 W with 10/1000 µs waveform and not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use where AEC-Q101 is not mandated. | Select SMAJ120A for cost-sensitive non-automotive designs needing identical clamping performance without qualification overhead. |
| 1.5SMC120A | Higher package thermal mass (SMC vs. SMA); same VWM/VC specs but RθJA = 60 °C/W (vs. 120 °C/W), enabling higher average power handling. | Better suited for high-duty-cycle surge environments (e.g., factory automation with frequent motor switching). | Choose 1.5SMC120A when board space allows larger SMC package and thermal management requires lower junction rise per watt. |
Compared with SMAJ120A and 1.5SMC120A, the P4SMA120AHM3/H uniquely combines AEC-Q101 qualification, SMA footprint compatibility, and verified 165 V clamping at 1.8 A - making it optimal for space-constrained automotive modules where qualification and layout continuity are mandatory.
Availability
P4SMA120AHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, telecom power distribution, and consumer appliance motor control requiring stable component supply, halogen-free compliance, and AEC-Q101 assurance.
Supply support for P4SMA120AHM3/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, with design focus on low-profile SMT integration, AEC-Q101 compliance, and consistent clamping under repetitive surge stress.
FAQ
What is the clamping voltage of the P4SMA120AHM3/H under a 10/1000 µs surge?
The P4SMA120AHM3/H has a maximum clamping voltage (VC) of 165 V at 1.8 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and represents the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4SMA120AHM3/H qualified for automotive applications?
Yes, the P4SMA120AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code. This designation indicates full compliance with the AEC-Q101 stress test standard for discrete semiconductors, including high-temperature operating life, temperature cycling, and ESD testing - making the P4SMA120AHM3/H suitable for under-hood and chassis-mounted automotive electronics.
What does the "HM3" suffix mean in P4SMA120AHM3/H?
The "HM3" suffix in P4SMA120AHM3/H denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. Per Vishay's ordering information (Document 88367, page 3), HM3 parts meet JESD201 Class 2 whisker resistance and are rated for automotive-grade reliability - distinguishing them from commercial-grade "E3" or "M3" variants that lack qualification.
Can the P4SMA120AHM3/H be used in bidirectional configurations?
No, the P4SMA120AHM3/H is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number and confirmed by its cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., P4SMA120CA); using P4SMA120AHM3/H in AC-coupled or symmetrical surge environments would result in forward conduction during negative half-cycles and potential failure.
What is the thermal resistance of the P4SMA120AHM3/H?
The P4SMA120AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on the minimum recommended pad layout (0.2" × 0.2" copper pads). These values define its self-heating under sustained power dissipation and inform PCB layout decisions for thermal management in high-reliability applications.
P4SMA120AHM3/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:
- 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/H FAQ
1.How can I place an order for P4SMA120AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120AHM3/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/H reliable?
The price and inventory of P4SMA120AHM3/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/H is usually 5 days.
3.What payment methods are accepted for P4SMA120AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120AHM3/H?
P4SMA120AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120AHM3/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/H?
For technical support, including P4SMA120AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120AHM3/H requirements.
6.How does Aetrix verify that P4SMA120AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA120AHM3/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/H meets industry standards.
7.What is the process for return or replacement of P4SMA120AHM3/H?
All P4SMA120AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120AHM3/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/H part is unused and in its original packaging.
Return procedure for P4SMA120AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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