My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA8.2CAHM3/H
- Part No.:
- P4SMA8.2CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2CAHM3/H.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,189
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA8.2CAHM3/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 8.2 V breakdown voltage (VBR), 7.02 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), 33.1 A peak pulse current (IPPM), and 12.1 V maximum clamping voltage (VC) - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the P4SMA8.2CAHM3/H datasheet, P4SMA8.2CAHM3/H pinout, P4SMA8.2CAHM3/H application, or P4SMA8.2CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.47), and MSL Level 1 moisture sensitivity rating for lead-free reflow compatibility.
Technical Context
The P4SMA8.2CAHM3/H operates as a bidirectional avalanche diode with symmetrical forward and reverse conduction characteristics, enabling transient suppression on AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<200 µA at VWM), while the 120 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature under defined PCB pad conditions.
It delivers 400 W peak pulse power per the 10/1000 µs waveform standard, derating linearly above 25 °C ambient per Figure 2, and maintains clamping performance across repetitive surge events at ≤0.01% duty cycle. The device meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 7.79 V (min) to 8.61 V (max) at 10 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering. |
| Stand-off Voltage VWM | 7.02 V - maximum continuous working voltage before leakage exceeds 200 µA; sets safe operating margin below VBR. |
| Clamping Voltage VC | 12.1 V at 33.1 A IPPM - limits downstream voltage during surge, protecting 3.3 V/5 V logic and analog front-ends. |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - sustains high-energy transients common in automotive load-dump and inductive switching events. |
| Operating Temperature | -65 °C to +150 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly; 5.0 mm × 5.0 mm copper pad layout required for rated power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | No polarity marking; terminals are functionally identical - enables placement without orientation check during SMT. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Unmarked device - eliminates risk of reverse installation error in AC or differential protection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - simplifies protection design for RS-485, CAN, USB, and other balanced interfaces. |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) without degradation. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules. |
| Halogen-free & RoHS-compliant | P4SMA8.2CAHM3/H uses HM3 suffix - meets EU RoHS Directive 2011/65/EU and JEDEC JS709C halogen-free standards. |
| Low clamping ratio | VC/VBR ≈ 1.47 - minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) from load-dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal line and ground to clamp fast transients before they reach ADC input or microcontroller GPIO. Use Value: Prevents latch-up and permanent damage to 5 V tolerant sensor interface ICs during 100 V/50 ms load-dump events per ISO 16750-2. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to shunt induced energy from relay coil switching and lightning-induced coupling. Use Value: Maintains functional safety integrity by limiting transient voltage to <12.1 V, well below 24 V system overvoltage trip thresholds. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY and PoE controller pins against ESD and surge in network edge devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS on differential pairs (e.g., TX+/TX−) to preserve signal integrity while suppressing ±8 kV contact ESD (IEC 61000-4-2). Use Value: Enables robust EMC compliance without adding series impedance or degrading 100BASE-TX eye diagram margins. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kickback before it couples into MCU power rails or Hall-effect position sensors. Use Value: Extends lifespan of 3.3 V microcontrollers by preventing repeated exposure to >30 V transients during motor start/stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | Higher 8.0 V VWM, 100 W lower PPPM (300 W), SMB package (larger footprint) | Limited to lower-energy transients; less suitable for automotive load-dump where 400 W is required | Select when board space allows larger SMB package and surge energy is constrained to <300 W. |
| 1.5KE8.2CA | Through-hole DO-201 package, same VBR/VC, but 1500 W PPPM and higher IPPM (123 A) | Designed for primary-level AC/DC input protection, not signal-line use due to parasitic inductance | Choose only for high-power bulk protection; not recommended for high-speed signal lines due to slower response and layout constraints. |
Compared with SMBJ8.0CA and 1.5KE8.2CA, the P4SMA8.2CAHM3/H uniquely balances 400 W surge handling, AEC-Q101 qualification, and compact SMA footprint - making it optimal for space-constrained, automotive-grade signal-line protection where both reliability and miniaturization are critical.
Availability
P4SMA8.2CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer appliance motor controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA8.2CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, high surge immunity, and surface-mount manufacturability are mandatory.
FAQ
What is the exact breakdown voltage range for P4SMA8.2CAHM3/H?
The P4SMA8.2CAHM3/H has a guaranteed breakdown voltage (VBR) range of 7.79 V to 8.61 V at 10 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage protection design for 5 V and 3.3 V systems. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88367.
Is P4SMA8.2CAHM3/H suitable for automotive applications?
Yes, P4SMA8.2CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It is explicitly listed in Vishay's ordering table for AEC-Q101 applications and meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - making P4SMA8.2CAHM3/H appropriate for engine control, body electronics, and ADAS sensor protection.
What does the "CA" suffix mean in P4SMA8.2CAHM3/H?
The "CA" suffix in P4SMA8.2CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and IPPM values regardless of voltage polarity. This eliminates the need for polarity-aware layout and makes P4SMA8.2CAHM3/H ideal for AC-coupled, differential, or floating signal lines such as CAN, RS-485, and audio interfaces.
What is the maximum clamping voltage of P4SMA8.2CAHM3/H at its rated peak pulse current?
The P4SMA8.2CAHM3/H clamps to a maximum of 12.1 V at its rated peak pulse current of 33.1 A (10/1000 µs waveform). This clamping voltage is measured under standardized test conditions with 0.2" × 0.2" copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events - ensuring compatibility with 5 V logic families and safeguarding sensitive analog inputs.
Does P4SMA8.2CAHM3/H require special PCB layout considerations?
Yes, P4SMA8.2CAHM3/H requires minimum 5.0 mm × 5.0 mm copper pad areas per terminal to achieve its rated 400 W peak pulse power and thermal performance. Smaller pads reduce heat dissipation, causing premature thermal runaway during repetitive surges. Additionally, short, low-inductance traces between the device and protected node are essential to minimize voltage overshoot - verified in Vishay's application guidance for the P4SMA Series.
P4SMA8.2CAHM3/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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 33.1A
- 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)
P4SMA8.2CAHM3/H FAQ
1.How can I place an order for P4SMA8.2CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/H reliable?
The price and inventory of P4SMA8.2CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA8.2CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2CAHM3/H?
P4SMA8.2CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/H?
For technical support, including P4SMA8.2CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2CAHM3/H requirements.
6.How does Aetrix verify that P4SMA8.2CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA8.2CAHM3/H?
All P4SMA8.2CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA8.2CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA8.2CAHM3/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
