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Vishay General Semiconductor - Diodes Division P4SMA30CAHM3_A/H
- Part No.:
- P4SMA30CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHM3_A/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,426
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Product details
Overview
P4SMA30CAHM3_A/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 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 in automotive sensor protection, industrial I/O interfaces, and telecom line surge suppression.
For engineers reviewing the P4SMA30CAHM3_A/H datasheet, P4SMA30CAHM3_A/H pinout, P4SMA30CAHM3_A/H application, or P4SMA30CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical bidirectional behavior - no polarity marking required. Its glass-passivated junction enables fast response time (<1 ns) and stable performance across -65 °C to +150 °C operating junction temperature range.
The P4SMA30CAHM3_A/H delivers 400 W peak pulse power handling per 10/1000 µs waveform at 25 °C, derated linearly above TA = 25 °C per Fig. 2, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - optimized for PCB-level transient suppression without heatsinking under typical layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (Breakdown Voltage) | 33.3 V min - guaranteed conduction onset at 1 mA test current, ensuring predictable turn-on |
| VC (Clamping Voltage) | 41.4 V max at IPPM = 9.7 A - limits downstream voltage stress during ESD or lightning-induced surges |
| PPPM (Peak Pulse Power) | 400 W - handles 10/1000 µs transients per JEDEC standards, sufficient for IEC 61000-4-5 Level 3 |
| ID (Reverse Leakage) | 1.0 µA max at VWM - negligible standby current, critical for low-power sensor and battery-backed circuits |
| TJ max | +150 °C - supports under-hood automotive and industrial environments with high ambient temperatures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTRB, HTGB, and TCT |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL level 1 (260 °C peak reflow). Cathode band absent - bidirectional symmetry eliminates polarity concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Accepts surge current from either terminal - symmetric conduction enables single-device bidirectional protection |
| Cathode | Transient current exit point (either direction) | Completes low-impedance path to ground or rail during overvoltage events - no DC polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-component protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS sensors, and infotainment power rails |
| 400 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial control and telecom interfaces |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes voltage overshoot during transients - protects 3.3 V/5 V logic and analog front-ends |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - simplifies SMT manufacturing |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and chassis ground, absorbing ±2 kV ESD and 100 V/100 ms load dump spikes. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs and analog-to-digital converters while maintaining signal integrity below 41.4 V. |
Use Scenario: Shielding PLC digital input modules from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across dry-contact inputs or optocoupler primary side, diverting surge energy away from isolation barrier. Use Value: Enables robust operation in harsh electromagnetic environments without requiring additional series impedance or filtering components. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair lines (A/B), coordinated with secondary GDT or polymer PTC for multi-stage protection. Use Value: Limits clamped voltage to ≤41.4 V, preserving transceiver common-mode range and preventing receiver saturation during 10/1000 µs surges. |
Use Scenario: Front-end ESD protection for USB 2.0 data lines and HDMI/DisplayPort differential pairs in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at connector, shunting >8 kV HBM ESD pulses before reaching serializer ICs. Use Value: Maintains signal integrity with <1 pF junction capacitance (typical at 0 V), avoiding data rate degradation up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same SMA package, 33 V VWM, 36.7 V VBR min, 53.3 V VC at 7.5 A - higher clamping voltage, lower PPPM (400 W same) | Less effective for 3.3 V/5 V rail protection due to higher VC; better suited for 24 V industrial bus lines | Select when system margin allows ≥53 V clamping and higher VWM tolerance is needed |
| 1.5SMC33CA | Higher-power SMC package (1500 W PPPM), 33 V VWM, 36.7 V VBR min, 53.3 V VC - larger footprint, higher thermal mass | Used where sustained surge energy exceeds P4SMA30CAHM3_A/H capability, e.g., AC mains input stages | Choose only if board space permits SMC and peak surge currents exceed 9.7 A |
Compared with SMAJ33CA and 1.5SMC33CA, the P4SMA30CAHM3_A/H offers tighter clamping (41.4 V vs. 53.3 V), smaller SMA footprint, and AEC-Q101 qualification - making it optimal for space-constrained automotive and portable industrial designs requiring precise low-voltage protection.
Availability
P4SMA30CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA30CAHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume transient protection applications across automotive, industrial, and communications markets - engineered for automated assembly, thermal robustness, and consistent clamping performance under repetitive surge stress.
FAQ
What is the clamping voltage of P4SMA30CAHM3_A/H at its rated peak pulse current?
The P4SMA30CAHM3_A/H has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value ensures downstream circuitry remains within safe operating limits during standardized surge events. The P4SMA30CAHM3_A/H maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C), with minimal derating required up to 125 °C.
Is P4SMA30CAHM3_A/H suitable for automotive applications?
Yes, P4SMA30CAHM3_A/H is AEC-Q101 qualified and specifically designated for automotive use with the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The P4SMA30CAHM3_A/H is commonly deployed in body control modules, ADAS camera interfaces, and infotainment power rails where transient immunity and long-term reliability are mandatory.
How does the bidirectional design of P4SMA30CAHM3_A/H affect PCB layout?
The bidirectional nature of P4SMA30CAHM3_A/H eliminates polarity marking and orientation constraints - no cathode band is present, allowing unrestricted placement on differential or AC-coupled signal paths. This simplifies layout, reduces assembly errors, and enables symmetric routing for balanced EMI suppression. The P4SMA30CAHM3_A/H requires only two 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal and surge performance, per Vishay's recommended mounting pad layout.
What is the maximum reverse leakage current for P4SMA30CAHM3_A/H at its standoff voltage?
The P4SMA30CAHM3_A/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its 30 V standoff voltage (VWM), tested at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes power loss in battery-operated systems. The P4SMA30CAHM3_A/H maintains leakage below 5 µA even at elevated temperatures up to 125 °C, supporting reliable operation in thermally demanding environments.
Does P4SMA30CAHM3_A/H require special handling during reflow soldering?
No - P4SMA30CAHM3_A/H is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C and unlimited floor life. It supports standard lead-free reflow profiles without pre-baking or moisture sensitivity precautions. The P4SMA30CAHM3_A/H uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, ensuring robust solderability and whisker resistance per JESD 201 Class 2.
P4SMA30CAHM3_A/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:
- 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/H FAQ
1.How can I place an order for P4SMA30CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHM3_A/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_A/H reliable?
The price and inventory of P4SMA30CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHM3_A/H?
P4SMA30CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHM3_A/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_A/H?
For technical support, including P4SMA30CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA30CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHM3_A/H?
All P4SMA30CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for P4SMA30CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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