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Vishay General Semiconductor - Diodes Division P4SMA120AHE3_A/I
- Part No.:
- P4SMA120AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120AHE3_A/I.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA120AHE3_A/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 automotive-grade circuit protection.
For engineers reviewing the P4SMA120AHE3_A/I datasheet, P4SMA120AHE3_A/I pinout, P4SMA120AHE3_A/I application, or P4SMA120AHE3_A/I equivalent, this AEC-Q101 qualified TVS diode supports robust overvoltage protection in high-reliability automotive electronics, industrial sensor interfaces, and power supply rail clamping where precise clamping response and low incremental surge resistance are critical.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 102 V), then rapidly avalanches below 126 V to clamp transients within nanoseconds. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.107 %/°C).
Designed for automated SMT assembly, it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and delivers 400 W peak pulse power on 5.0 mm × 5.0 mm copper pads - derated to 300 W above 91 V - while maintaining thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - precise avalanche onset range ensuring predictable turn-on during transients |
| VC (Clamping Voltage) | 165 V at IPPM = 1.8 A - maximum voltage seen by protected circuit during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM (Peak Pulse Power) | 400 W - transient energy absorption capability with 10/1000 µs waveform, enabling protection against IEC 61000-4-5 surges |
| ID (Reverse Leakage) | 1.0 µA max at VWM - negligible standby current preserving signal integrity and power efficiency in always-on systems |
| TJ max | 150 °C - maximum junction temperature supporting operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units, ADAS sensors, and body electronics |
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 on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path (unidirectional) | Connected to ground or low-side reference; completes clamping path when cathode is tied to protected line |
| Cathode | Protected line connection / avalanche conduction node | Connected to the line requiring protection (e.g., 12 V rail); conducts surge current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV surge) without external series impedance |
| AEC-Q101 qualification | Validated reliability for automotive under-hood and chassis-mounted electronics across -65 °C to +150 °C |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| MSL Level 1 rating | Supports single-reflow Pb-free assembly at 260 °C without moisture sensitivity concerns |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in MOSFETs/ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power distribution networks in engine control modules (ECMs) and body control modules (BCMs) from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and ground to clamp transients <100 ns after onset. Use Value: Limits rail voltage to ≤165 V during 400 W surges, preventing brownout resets and MOSFET drain-source breakdown in power management ICs. |
Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, and position sensors in factory automation PLCs exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Low-leakage (1 µA) TVS mounted directly at connector interface to suppress sub-100 ns ESD events and 10/1000 µs surges. Use Value: Maintains signal fidelity with <1 pF junction capacitance while clamping to 165 V, avoiding ADC input saturation or op-amp rail-to-rail excursion. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing −48 V DC input stages of telecom base station power supplies against lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: High-VBR (114–126 V) unidirectional TVS used in conjunction with upstream fuse and common-mode choke. Use Value: Withstands repeated 400 W pulses without degradation, meeting GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Adding secondary-level overvoltage protection at DC barrel jack inputs of smart home hubs and set-top boxes fed by wall adapters. IC Role / Device Role / Timing Role: Standoff-rated (102 V) TVS acting as last-line defense against adapter fault conditions and hot-plug transients. Use Value: Prevents catastrophic failure of PMICs and SoCs by limiting input voltage to 165 V even during sustained overvoltage 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 |
|---|---|---|---|
| SMAJ120A-E3/5A | Same SMA package, identical VWM (102 V), VBR (114–126 V), VC (165 V), but rated for 400 W only up to 85 °C ambient; no AEC-Q101 qualification | Commercial/industrial use only; not approved for automotive production | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive qualification |
| 1.5SMC120A | Larger SMC (DO-214AB) package (7.11 mm × 6.22 mm vs. 4.50 mm × 3.99 mm), same electrical specs, higher thermal mass (RθJA = 100 °C/W), 1500 W peak pulse power rating | Used where board space allows larger footprint and higher surge margin is needed beyond 400 W | Choose when PCB layout permits larger package and system-level surge testing exceeds IEC 61000-4-5 Level 4 |
Compared with SMAJ120A-E3/5A, P4SMA120AHE3_A/I adds AEC-Q101 validation and tighter process control for automotive deployment; versus 1.5SMC120A, it trades surge headroom for compactness and lower profile - critical for space-constrained automotive ECUs and sensor nodes.
Availability
P4SMA120AHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA120AHE3_A/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 high-reliability diodes, rectifiers, and protection devices engineered for automotive, industrial, and computing applications.
The P4SMA Series targets compact, high-performance transient suppression in space-constrained automotive and industrial systems, emphasizing AEC-Q101 qualification, low-profile packaging, and consistent clamping behavior across temperature and lifetime.
FAQ
What is the clamping voltage of the P4SMA120AHE3_A/I under a 10/1000 µs surge?
The P4SMA120AHE3_A/I clamps to a maximum of 165 V when subjected to its rated peak pulse current of 1.8 A with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and represents the upper voltage limit imposed on the protected circuit during transient events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4SMA120AHE3_A/I suitable for automotive applications?
Yes, the P4SMA120AHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from −65 °C to +150 °C. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified variants, making P4SMA120AHE3_A/I appropriate for engine control units, ADAS camera modules, and body electronics where reliability under thermal and mechanical stress is mandatory.
What does the "A/I" suffix mean in P4SMA120AHE3_A/I?
The "A/I" suffix in P4SMA120AHE3_A/I indicates the packaging configuration: "A" denotes the AEC-Q101 qualified version (as opposed to commercial-grade "E3"), and "I" specifies 13-inch diameter plastic tape-and-reel delivery containing 7500 units. This format supports high-volume SMT assembly and aligns with Vishay's ordering convention for automotive-grade parts requiring full traceability and controlled handling.
How does the P4SMA120AHE3_A/I compare to bidirectional TVS diodes like P4SMA120CA?
The P4SMA120AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering lower leakage (<1 µA at 102 V) and sharper turn-on. In contrast, P4SMA120CA is bidirectional, suited for AC or polarity-agnostic signals (e.g., data lines), but exhibits higher leakage (≤10 µA) and slightly reduced clamping efficiency. Use P4SMA120AHE3_A/I when protecting defined-polarity DC rails in automotive systems where low standby current and precise clamping are essential.
What is the thermal resistance of the P4SMA120AHE3_A/I, and how does it affect layout design?
The P4SMA120AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. These values assume mounting on minimum recommended 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical in automotive applications where ambient temperatures may exceed 85 °C and derating curves apply above TA = 25 °C.
P4SMA120AHE3_A/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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA120AHE3_A/I FAQ
1.How can I place an order for P4SMA120AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120AHE3_A/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 P4SMA120AHE3_A/I reliable?
The price and inventory of P4SMA120AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA120AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120AHE3_A/I?
P4SMA120AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120AHE3_A/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 P4SMA120AHE3_A/I?
For technical support, including P4SMA120AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA120AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA120AHE3_A/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 P4SMA120AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA120AHE3_A/I?
All P4SMA120AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120AHE3_A/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 P4SMA120AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA120AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA120AHE3_A/I Tags
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