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Vishay General Semiconductor - Diodes Division P4SMA30AHM3_A/I
- Part No.:
- P4SMA30AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30AHM3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,960
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Product details
Overview
P4SMA30AHM3_A/I 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 30 V standoff voltage (VWM), 31.5 V maximum breakdown voltage (VBR), 41.4 V clamping voltage at 9.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P4SMA30AHM3_A/I datasheet, P4SMA30AHM3_A/I pinout, P4SMA30AHM3_A/I application, or P4SMA30AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), polarity marking convention, and direct alternative part comparisons for ESD/surge protection design-in.
Technical Context
The P4SMA30AHM3_A/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 30 V stand-off threshold to clamp transient energy into ground. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
It delivers 400 W peak pulse power (10/1000 µs) at 25 °C, derated linearly above TA = 25 °C per Fig. 2, with 30 °C/W junction-to-lead thermal resistance enabling effective heat dissipation on standard 5.0 mm × 5.0 mm copper pads. The cathode band denotes polarity, and it is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on under surge conditions. |
| VC (Clamping Voltage) | 41.4 V at 9.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability; validated per IEC 61000-4-5 with 10/1000 µs waveform. |
| ID (Reverse Leakage) | <1 µA at 30 V - Minimal standby current draw; preserves battery life and avoids false triggering in low-power systems. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; informs PCB pad sizing and airflow requirements for reliability. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by black band; anode is unmarked end. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line (e.g., 30 V rail or signal trace); conducts during forward bias or reverse clamping. |
| Cathode | Clamping reference / Ground connection point | Marked with black band; tied to system ground or low-impedance return path to shunt transient energy safely. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth, 2 kV line-line) without derating in typical layouts. |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without pre-baking or special handling. |
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates parameter drift due to surface contamination or humidity ingress. |
| Low incremental surge resistance | Minimizes clamping overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection fidelity. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input pins of transceivers or ADC front-ends. Use Value: Prevents latch-up or permanent damage to automotive-grade ICs under ISO 7637-2 pulses, leveraging AEC-Q101 qualification and 150 °C TJ max. |
Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, RS-232) against ESD and lightning-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted at connector entry point to divert >1 kV transients away from isolation barriers and level-shifting circuitry. Use Value: Maintains functional safety integrity with 41.4 V clamping voltage limiting stress on downstream optocouplers and protection ICs during repetitive surge events. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers exposed to mains-borne transients and hot-plug events. IC Role / Device Role / Timing Role: Unidirectional clamping device across DC output rails (e.g., 5 V, 12 V, 24 V) to prevent overvoltage damage to connected devices. Use Value: Delivers 400 W pulse handling without thermal runaway, supported by 3.3 W steady-state power dissipation and 120 °C/W RθJA for compact board layouts. |
Use Scenario: Primary-level surge suppression on telephone line interface cards handling POTS, DSL, or VoIP signals in central office and CPE equipment. IC Role / Device Role / Timing Role: Fast-response TVS placed before hybrid transformers and line drivers to absorb induced lightning surges per ITU-T K.20/K.21. Use Value: Achieves sub-1 ns response time and low capacitance (<100 pF at VWM), preserving signal integrity on high-frequency telecom lines while meeting GR-1089-CORE requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same VWM (30 V), identical SMA package, but rated for 400 W only up to 91 V; no AEC-Q101 qualification. | Lacks automotive qualification; suitable for commercial/industrial use where AEC-Q101 is not mandated. | Select SMAJ30A for cost-sensitive non-automotive designs requiring same clamping performance without qualification overhead. |
| 1.5SMC30A | Higher package thermal mass (DO-214AB), 400 W rating, but larger footprint (7.11 mm × 6.22 mm) and 150 °C TJ max; no AEC-Q101. | Requires PCB layout change; better suited for high-reliability industrial power supplies needing higher thermal margin. | Choose 1.5SMC30A only if board space allows larger package and thermal derating is critical beyond SMA's 120 °C/W RθJA. |
Compared with SMAJ30A and 1.5SMC30A, P4SMA30AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and DO-214AC form factor - making it the only drop-in option for automotive Tier-1 suppliers requiring both compliance and compactness without sacrificing clamping performance.
Availability
P4SMA30AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA30AHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets high-volume transient suppression in automotive, industrial, and consumer electronics, engineered for robust surge handling, AEC-Q101 compliance, and seamless SMT integration in space-constrained designs.
FAQ
What is the clamping voltage of P4SMA30AHM3_A/I at its rated peak pulse current?
The P4SMA30AHM3_A/I has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per standard test methods and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA30AHM3_A/I maintains this clamping performance across its specified operating temperature range and is validated for repetitive surge duty cycles up to 0.01 %.
Is P4SMA30AHM3_A/I qualified for automotive applications?
Yes, P4SMA30AHM3_A/I is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification, and the "_A/I" indicates packaging in 13-inch tape-and-reel format. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - all required for under-hood and cabin-mounted ECUs.
What does the "HM3" suffix mean in P4SMA30AHM3_A/I?
The "HM3" suffix in P4SMA30AHM3_A/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes the part from commercial-grade variants (e.g., "E3" or "M3") and confirms compliance with automotive reliability standards. The "HM3" designation applies to the entire P4SMA family for voltages up to 220 V, and P4SMA30AHM3_A/I is explicitly listed in Vishay's ordering table as an AEC-Q101 qualified variant.
How does P4SMA30AHM3_A/I compare to bidirectional TVS diodes like P4SMA30CA?
P4SMA30AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +30 V rail to ground), offering lower leakage and tighter VBR tolerance than bidirectional equivalents. In contrast, P4SMA30CA provides symmetrical clamping for AC or floating signal lines but exhibits higher reverse leakage and wider VBR spread. The P4SMA30AHM3_A/I cannot substitute for P4SMA30CA in AC-coupled applications without circuit redesign.
What is the maximum operating temperature for P4SMA30AHM3_A/I?
The P4SMA30AHM3_A/I has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of –65 °C to +150 °C. This rating enables reliable operation in under-hood automotive environments and sealed industrial enclosures. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in the datasheet, and thermal design must account for RθJA = 120 °C/W using recommended 5.0 mm × 5.0 mm copper pads.
P4SMA30AHM3_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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- 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)
P4SMA30AHM3_A/I FAQ
1.How can I place an order for P4SMA30AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30AHM3_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 P4SMA30AHM3_A/I reliable?
The price and inventory of P4SMA30AHM3_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 P4SMA30AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA30AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30AHM3_A/I?
P4SMA30AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30AHM3_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 P4SMA30AHM3_A/I?
For technical support, including P4SMA30AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA30AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA30AHM3_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 P4SMA30AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA30AHM3_A/I?
All P4SMA30AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30AHM3_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 P4SMA30AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA30AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30AHM3_A/I Tags
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