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Vishay General Semiconductor - Diodes Division P4SMA30CAHM3_A/I
- Part No.:
- P4SMA30CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHM3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,995
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Product details
Overview
P4SMA30CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 μs). It clamps transients to ≤41.4 V at 9.7 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA30CAHM3_A/I datasheet, P4SMA30CAHM3_A/I pinout, P4SMA30CAHM3_A/I application, or P4SMA30CAHM3_A/I equivalent, this device serves as a robust, halogen-free, RoHS-compliant TVS for bidirectional surge suppression on signal lines, sensor interfaces, and power rails in harsh environments where fast response (<1 ns), low clamping ratio, and MSL Level 1 reliability are required.
Technical Context
The P4SMA30CAHM3_A/I operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction enables stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 μs pulses at 0.01% duty cycle.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads, it delivers 400 W peak pulse power up to 91 V and derates to 300 W above that threshold. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting operation from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 33.3 V min - Voltage at which device enters avalanche conduction at 1 mA test current; ensures reliable triggering above normal operating range. |
| VC (Clamping Voltage) | 41.4 V max at 9.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs transient; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID (Reverse Leakage) | 1.0 μA max at 30 V - Minimal leakage at rated VWM ensures negligible standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating enabling use in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; accepts reverse surge current when voltage falls below –VWM. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical avalanche junction; accepts forward surge current when voltage exceeds +VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow soldering without moisture sensitivity handling. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills environmental compliance mandates for global automotive and industrial OEMs. |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor signal and ground, clamping ±100 V transients within nanoseconds. Use Value: Prevents sensor IC latch-up or damage while maintaining signal fidelity due to low leakage (<1 μA) and minimal capacitance. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD and burst events in vehicle body control modules. IC Role / Device Role / Timing Role: Two P4SMA30CAHM3_A/I devices deployed in common-mode configuration, each protecting one line to ground. Use Value: Maintains CAN signal integrity up to 1 Mbps with <1 ns response time and no DC bias impact on bus termination. |
| Telecom DSL Line Surge Protection | Consumer Appliance Motor Drive Feedback Protection |
Use Scenario: Shielding ADSL/VDSL line interface ICs from lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: Bidirectional TVS installed between tip/ring and ground on front-end filter stage. Use Value: Absorbs 400 W surges per line while preserving low-frequency signal passband and meeting GR-1089-CORE requirements. |
Use Scenario: Securing hall-effect rotor position feedback signals in BLDC motor controllers against commutation noise. IC Role / Device Role / Timing Role: TVS placed at microcontroller ADC input pins receiving conditioned hall sensor outputs. Use Value: Blocks sub-microsecond spikes from motor phase switching without distorting 1–10 kHz position sampling accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher VWM (33 V), same SMA package, 600 W PPPM rating | Better suited for 28 V automotive systems; clamps at 53.3 V vs. 41.4 V for P4SMA30CAHM3_A/I | Select SMBJ33CA when higher standoff margin or greater surge headroom is needed; not drop-in due to VWM mismatch. |
| 1.5SMC33CA | Same VWM (33 V), larger SMC (DO-214AB) package, 1500 W PPPM | Requires PCB layout change; used where higher energy absorption is mandatory (e.g., power supply inputs) | Choose 1.5SMC33CA only if system-level surge tests exceed 400 W; incompatible pinout and footprint. |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA30CAHM3_A/I offers tighter VWM tolerance (30 V vs. 33 V), lower clamping voltage (41.4 V), and AEC-Q101 qualification in the compact SMA footprint-making it optimal for space-constrained, automotive-grade signal-line protection where precise voltage coordination matters.
Availability
P4SMA30CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom line cards, and consumer appliance motor control requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability assurance.
Supply support for P4SMA30CAHM3_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 cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications equipment-designed for automated placement, robust surge handling, and long-term stability in harsh thermal environments.
FAQ
What is the maximum clamping voltage of the P4SMA30CAHM3_A/I at its rated peak pulse current?
The P4SMA30CAHM3_A/I has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures downstream ICs see limited overvoltage during surge events, and it is guaranteed across the full operating temperature range per the Vishay datasheet revision 09-Jan-2024. The P4SMA30CAHM3_A/I maintains this clamping performance with low incremental resistance due to its glass-passivated junction design.
Is the P4SMA30CAHM3_A/I suitable for automotive applications?
Yes, the P4SMA30CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It operates from –65 °C to +150 °C junction temperature and meets MSL Level 1 reflow requirements. The P4SMA30CAHM3_A/I is explicitly recommended for sensor protection, infotainment interfaces, and body electronics where bidirectional transient suppression is required without polarity constraints.
What does the "CA" suffix mean in P4SMA30CAHM3_A/I?
The "CA" suffix in P4SMA30CAHM3_A/I denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA30AHM3_A/I), the CA version has no cathode marking and functions identically regardless of orientation. This makes the P4SMA30CAHM3_A/I ideal for AC-coupled lines, differential buses, and floating signal paths where polarity cannot be assumed.
How does the P4SMA30CAHM3_A/I compare to the P4SMA30AHM3_A/I?
The P4SMA30CAHM3_A/I is bidirectional, whereas the P4SMA30AHM3_A/I is unidirectional (anode-cathode asymmetry with band marking). Their VWM, VBR, and PPPM ratings are identical, but the P4SMA30CAHM3_A/I clamps in both directions and lacks polarity identification. Use the P4SMA30CAHM3_A/I for balanced lines like RS-485 or CAN; choose the P4SMA30AHM3_A/I only when DC-biased protection with defined polarity is required.
What is the thermal resistance of the P4SMA30CAHM3_A/I, and how does it affect PCB layout?
The P4SMA30CAHM3_A/I 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 5.0 mm × 5.0 mm copper pads per terminal. To maintain reliability under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks. The P4SMA30CAHM3_A/I achieves full 400 W rating only with this pad size; reducing pad area increases junction temperature and requires derating per Figure 2 in the datasheet.
P4SMA30CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA30CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHM3_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 P4SMA30CAHM3_A/I reliable?
The price and inventory of P4SMA30CAHM3_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 P4SMA30CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHM3_A/I?
P4SMA30CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHM3_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 P4SMA30CAHM3_A/I?
For technical support, including P4SMA30CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA30CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHM3_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 P4SMA30CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHM3_A/I?
All P4SMA30CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHM3_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 P4SMA30CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA30CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30CAHM3_A/I Tags
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