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Vishay General Semiconductor - Diodes Division P4SMA30CAHM3/I
- Part No.:
- P4SMA30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,717
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Product details
Overview
P4SMA30CAHM3/I 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 and 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, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA30CAHM3/I datasheet, P4SMA30CAHM3/I pinout, P4SMA30CAHM3/I application, or P4SMA30CAHM3/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), clamping performance under surge conditions, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA30CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for protecting sensitive inputs against ESD and inductive switching spikes.
Rated for 150 °C maximum junction temperature and MSL Level 1 (260 °C reflow peak), it supports automated SMT placement on standard 0.2" × 0.2" copper pads. The device delivers 400 W peak pulse power up to 91 V, derating to 300 W above that threshold per Fig. 2 of the datasheet.
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 below clamping threshold. |
| VBR (Breakdown Voltage) | 33.3 V min at 1 mA - Voltage at which avalanche conduction initiates; ensures reliable triggering during transients. |
| VC (Clamping Voltage) | 41.4 V max at 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 - Surge energy handling capability with 10/1000 µs waveform; validates protection level for common lightning/inductive spikes. |
| ID (Reverse Leakage) | 1.0 µA max at 30 V - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs PCB pad design and power derating above 25 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, matte tin-plated leads, compliant with J-STD-002 and JESD22-B102 solderability standards. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Enables clamping in both voltage polarities - no external polarity assignment required in layout. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Same physical terminal as anode under reverse polarity; dual-role terminal eliminates orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 24 V industrial buses. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where long-term reliability under thermal cycling is mandatory. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-020 MSL Level 1, enabling use in green manufacturing environments. |
| Low profile SMA package | 0.208" × 0.157" footprint with 0.090" height - fits dense PCB layouts while maintaining 0.110" lead spacing for IPC-7351B compliance. |
| 120 °C/W thermal resistance | Allows direct mounting on 5 mm × 5 mm copper pads without heatsinking for ≤0.5 W average dissipation in ambient ≤70 °C. |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Protecting gate drivers and feedback sensors from inductive kickback during PWM switching of 24 V DC motors. IC Role / Device Role / Timing Role: Bidirectional TVS clamps ±40 V transients induced by relay coil de-energization or MOSFET turn-off. Use Value: Limits voltage stress on SiC gate drivers to <42 V, preventing oxide breakdown and ensuring >10-year field reliability. |
Use Scenario: Safeguarding LIN bus transceivers and door module microcontrollers against load dump and jump-start events. IC Role / Device Role / Timing Role: Clamps 12 V system transients up to ±60 V within 1 ns, preserving data integrity during battery disconnection/reconnection. Use Value: Maintains LIN communication continuity during ISO 7637-2 Pulse 5a (75 V/350 ms), avoiding ECU reset or firmware corruption. |
| Telecom Power Supply Input | Consumer Sensor Interface |
Use Scenario: Suppressing lightning-induced surges on 48 V PoE injectors feeding IP cameras and access points. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp limits input rail excursion to 45 V during 10/1000 µs surges up to 400 W. Use Value: Prevents damage to primary-side controllers and isolation transformers, meeting IEC 61000-4-5 2 kV line-to-earth immunity. |
Use Scenario: Shielding I²C and analog sensor outputs (e.g., temperature, humidity) from ESD and board-level coupling noise. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional suppression absorbs ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: Enables fail-safe sensor operation in unshielded consumer enclosures, eliminating false readings or ADC saturation. |
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), higher VC (53.3 V), SMB package (larger footprint, RθJA = 85 °C/W) | Better suited for 36 V systems; requires larger PCB area and offers superior thermal performance | Select when higher standoff margin or improved thermal dissipation is needed; not drop-in due to package size and pin pitch mismatch. |
| 1.5SMC33CA | Same VWM/VC, but DO-214AB package (SMB), 1500 W PPPM rating, higher IPPM (42.9 A) | Targeted at higher-energy surge environments (e.g., outdoor telecom); larger footprint and higher cost | Choose for enhanced surge margin in harsh environments; incompatible pinout and layout - redesign required. |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA30CAHM3/I provides optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and precise 30 V clamping for 24 V industrial and automotive subsystems - making it ideal where space, reliability, and regulatory alignment are jointly constrained.
Availability
P4SMA30CAHM3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, telecom power input stages, and consumer sensor interface designs requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for P4SMA30CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in space-constrained, thermally demanding applications - particularly targeting automotive, industrial automation, and communications infrastructure where AEC-Q101 validation and halogen-free compliance are mandatory.
FAQ
What is the clamping voltage of the P4SMA30CAHM3/I at its rated peak pulse current?
The P4SMA30CAHM3/I has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA30CAHM3/I maintains this clamping performance across its full operating temperature range of -65 °C to +150 °C.
Is the P4SMA30CAHM3/I suitable for automotive applications?
Yes, the P4SMA30CAHM3/I is AEC-Q101 qualified (denoted by the HM3 suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD per the AEC standard. It is specifically intended for automotive body electronics, infotainment interfaces, and sensor protection in 12 V and 24 V systems. The P4SMA30CAHM3/I also meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements.
What does the "CA" suffix indicate in P4SMA30CAHM3/I?
The "CA" suffix in P4SMA30CAHM3/I denotes a bidirectional Transient Voltage Suppressor - meaning it provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. Unlike unidirectional variants (e.g., P4SMA30A), the CA version has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals. This makes the P4SMA30CAHM3/I ideal for AC-coupled lines or differential signal protection.
How does the P4SMA30CAHM3/I compare to the P4SMA30A in terms of electrical behavior?
The P4SMA30CAHM3/I is bidirectional with identical VWM (30 V), VBR (33.3 V min), and VC (41.4 V max) ratings as the unidirectional P4SMA30A, but differs in polarity handling: the P4SMA30A conducts only in reverse bias and requires correct cathode orientation, whereas the P4SMA30CAHM3/I clamps equally in both directions and carries no polarity marking. Both share the same SMA package, AEC-Q101 qualification (HM3), and halogen-free construction.
What is the thermal resistance and maximum power dissipation of the P4SMA30CAHM3/I?
The P4SMA30CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. Its steady-state power dissipation (PD) is rated at 3.3 W at TA = 50 °C. Derating follows the curve in Figure 2 of datasheet 88367, reducing to ~2.2 W at 100 °C ambient. These values directly inform PCB copper area requirements and thermal management for continuous operation of the P4SMA30CAHM3/I.
P4SMA30CAHM3/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:
- 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/I FAQ
1.How can I place an order for P4SMA30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHM3/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/I reliable?
The price and inventory of P4SMA30CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHM3/I?
P4SMA30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHM3/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/I?
For technical support, including P4SMA30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHM3/I requirements.
6.How does Aetrix verify that P4SMA30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHM3/I?
All P4SMA30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHM3/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/I part is unused and in its original packaging.
Return procedure for P4SMA30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30CAHM3/I Tags
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