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Vishay General Semiconductor - Diodes Division P4SMA30CAHM3/H
- Part No.:
- P4SMA30CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHM3/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA30CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 41.4 V maximum clamping voltage (VC) at 9.7 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial control systems.
For engineers reviewing the P4SMA30CAHM3/H datasheet, P4SMA30CAHM3/H pinout, P4SMA30CAHM3/H application, or P4SMA30CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), junction temperature range (–65 °C to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA30CAHM3/H operates bidirectionally with symmetrical clamping in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, critical for consistent transient suppression across repeated surges.
Rated for 400 W peak pulse power (derated to 300 W above 91 V), it sustains repetitive 10/1000 μs transients at 0.01 % duty cycle when mounted on 5.0 mm × 5.0 mm copper pads. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 33.3 V min @ 1.0 mA - Guaranteed avalanche initiation threshold; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 41.4 V max @ 9.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capability for standardized 10/1000 μs transient; supports IEC 61000-4-5 Level 3/4 surge immunity. |
| TJ Range | –65 °C to +150 °C - Full operational junction temperature range; enables use in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with automated pick-and-place and reflow soldering. |
| AEC-Q101 Qualified | Yes - Validated for automotive reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes halogen-free, RoHS-compliant AEC-Q101 grade. |
Pinout & Package
SMA (DO-214AC) package: two-terminal, bidirectional device with no polarity marking; terminals are matte tin-plated leads solderable per J-STD-002 and JESD22-B102, meeting JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity surge) | Conducts during negative-going transients; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive polarity surge) | Conducts during positive-going transients; enables bidirectional protection without external polarity management. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails without polarity concerns. |
| 400 W peak pulse power | Supports robust IEC 61000-4-5 surge immunity up to 1 kV open-circuit / 0.5 kV source impedance in industrial and automotive designs. |
| AEC-Q101 qualified (HM3) | Validated for automotive-grade reliability including high-temp operation, thermal cycling, and long-term stability in harsh environments. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive ICs. |
| MSL Level 1 (260 °C peak) | Allows standard lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing load-dump and ISO 7637-2 pulse 5a/b transients on 5–12 V sensor supply and signal lines. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADC front-ends by limiting transient voltage to ≤41.4 V at 9.7 A. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Differential-line TVS suppressing EFT bursts (IEC 61000-4-4) and surge events (IEC 61000-4-5) on A/B bus lines. Use Value: Maintains signal integrity by clamping common-mode surges while preserving <10 pF junction capacitance to avoid data rate degradation. |
| Consumer USB Port Protection | Power Supply Input Stage |
Use Scenario: Shielding USB 2.0 D+/D– lines in smart home hubs and set-top boxes against ESD (IEC 61000-4-2 ±15 kV air) and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector to shunt fast transients before reaching PHY IC. Use Value: Limits ESD-induced voltage to <45 V within nanoseconds, preventing gate oxide rupture in USB transceiver input stages. |
Use Scenario: Secondary-side transient suppression on 24 V DC input rails of industrial IoT gateways and PoE-powered devices. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing switching spikes from relay coils, solenoids, and inductive loads connected to same rail. Use Value: Extends lifetime of DC-DC converter input capacitors and MOSFETs by clamping repetitive 400 W pulses without thermal runaway (RθJA = 120 °C/W). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher VWM (33 V), higher VC (53.3 V), SMB package (larger footprint, RθJA = 100 °C/W) | Lower clamping ratio (VC/VWM = 1.61 vs. 1.38), less suitable for tight 3.3 V or 5 V rail margins | Select when board space allows larger SMB package and higher clamping voltage is acceptable for 3.3 V logic protection. |
| 1.5SMC33CA | Same VWM/VC specs but SMC package (7.11 mm × 6.22 mm), higher PPPM (1500 W), RθJA = 15 °C/W | Over-specified power handling; requires larger PCB pad area and thermal relief for lower-power applications | Choose only when 1500 W surge rating is required; otherwise, P4SMA30CAHM3/H offers better size-to-performance ratio for compact designs. |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA30CAHM3/H delivers optimal balance of compact SMA footprint, AEC-Q101 qualification, and precise 30 V clamping margin - making it preferred for space-constrained automotive and industrial PCBs where thermal management and reliability are prioritized over raw power rating.
Availability
P4SMA30CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and consumer USB interface protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA30CAHM3/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 automotive-grade qualification.
The P4SMA Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the P4SMA30CAHM3/H at its rated peak pulse current?
The P4SMA30CAHM3/H 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 circuits during surge events. The P4SMA30CAHM3/H maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C) due to its stable avalanche characteristics.
Is the P4SMA30CAHM3/H suitable for automotive applications?
Yes, the P4SMA30CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stringent reliability requirements including temperature cycling, high-temperature reverse bias, and mechanical shock testing. The P4SMA30CAHM3/H is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where sustained operation at 150 °C junction temperature is required.
What does the "CA" suffix indicate in P4SMA30CAHM3/H?
The "CA" suffix in P4SMA30CAHM3/H designates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA30AHM3/H), the CA version has no polarity marking and functions identically regardless of applied voltage polarity. This makes the P4SMA30CAHM3/H ideal for protecting AC-coupled lines, differential buses, and floating grounds.
How does the thermal resistance of the P4SMA30CAHM3/H affect its derating in real-world layouts?
The P4SMA30CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. In practice, this means that at 3.3 W steady-state power dissipation, junction temperature rises ~400 °C above ambient - confirming that the device is intended for transient-only operation. The P4SMA30CAHM3/H must not be subjected to continuous forward conduction; its ratings assume short-duration pulses with ≤0.01 % duty cycle.
Does the P4SMA30CAHM3/H require special PCB layout considerations?
Yes - to achieve rated 400 W peak pulse power, the P4SMA30CAHM3/H must be mounted on copper pads of at least 5.0 mm × 5.0 mm per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal resistance and reduce surge capability. Additionally, minimize trace length between the P4SMA30CAHM3/H and protected node to reduce inductance, ensuring sub-nanosecond response. Avoid routing high-speed signals near the P4SMA30CAHM3/H anode/cathode traces to prevent coupling.
P4SMA30CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA30CAHM3/H FAQ
1.How can I place an order for P4SMA30CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHM3/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 P4SMA30CAHM3/H reliable?
The price and inventory of P4SMA30CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHM3/H?
P4SMA30CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHM3/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 P4SMA30CAHM3/H?
For technical support, including P4SMA30CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHM3/H requirements.
6.How does Aetrix verify that P4SMA30CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHM3/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 P4SMA30CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHM3/H?
All P4SMA30CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHM3/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 P4SMA30CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA30CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30CAHM3/H Tags
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