My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA6.8CAHM3_A/H
- Part No.:
- P4SMA6.8CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CAHM3_A/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,399
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA6.8CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping ESD and surge transients on signal/power lines. It features 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), <10.5 V clamping voltage at 38.1 A peak current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the P4SMA6.8CAHM3_A/H datasheet, P4SMA6.8CAHM3_A/H pinout, P4SMA6.8CAHM3_A/H application, or P4SMA6.8CAHM3_A/H equivalent, this device serves as a robust, surface-mount overvoltage protection solution for bidirectional signal paths in automotive sensor interfaces, industrial I/O, and telecom line protection where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The P4SMA6.8CAHM3_A/H operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at VWM), while its MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power under standard 10/1000 µs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), enabling reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45–7.14 V at 10 mA test current - defines precise avalanche initiation threshold for bidirectional clamping |
| Stand-off Voltage VWM | 5.80 V - maximum continuous reverse working voltage before significant leakage begins |
| Clamping Voltage VC | 10.5 V at 38.1 A peak pulse - limits transient voltage seen by protected ICs to safe levels |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - sustains high-energy surges without failure under defined test conditions |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Max Junction Temperature | +150 °C - enables deployment in under-hood and industrial environments with elevated ambient temperatures |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional device with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal accepts positive or negative transients - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy lightning-induced surges on automotive CAN, LIN, and sensor lines without degradation |
| Low clamping voltage (10.5 V @ 38.1 A) | Protects 5 V logic and microcontrollers by limiting transient overshoot below damage thresholds |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensors |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog/digital output lines of pressure, temperature, and position sensors in engine compartments and chassis modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector interface to shunt transients before reaching ASIC or MCU input pins. Use Value: Prevents latch-up or permanent damage to sensor signal conditioning circuits during load dump or ISO 7637-2 pulse 5a events. |
Use Scenario: Safeguarding PLC digital input channels exposed to field wiring in factory automation systems. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on 24 V DC input lines subject to inductive switching spikes from solenoids and relays. Use Value: Eliminates need for external series impedance or RC filtering while maintaining signal integrity and EMC compliance. |
| Telecom Line Interface Protection | Consumer USB/UART Port Protection |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or polymer PTC devices. Use Value: Maintains signal symmetry and common-mode rejection while absorbing >1 kV EFT bursts per IEC 61000-4-4. |
Use Scenario: Adding robust ESD immunity to USB 2.0 data lines and UART debug ports in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp placed adjacent to connector to divert ±15 kV contact discharge per IEC 61000-4-2. Use Value: Preserves signal rise/fall times and prevents bit errors without degrading data rate up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Higher 600 W PPPM rating, larger SMB (DO-214AA) package (4.58 mm × 3.94 mm), 11.2 V clamping at 34.4 A | Better suited for higher-energy surges but requires more PCB area; less optimal for space-constrained automotive modules | Select SMBJ6.8CA when system-level surge tests exceed IEC 61000-4-5 Level 3 (1 kV/2 Ω); retain P4SMA6.8CAHM3_A/H for cost- and size-sensitive AEC-Q101 designs. |
| 1.5SMC6.8CA | Same 400 W rating but in larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); 10.5 V clamping identical, 1000 µA max leakage at VWM | Offers higher thermal mass for repetitive surge duty but incompatible with fine-pitch automated placement used in compact ECUs | Choose 1.5SMC6.8CA only if board layout allows larger footprint and thermal management prioritizes sustained pulse handling over miniaturization. |
Compared with SMBJ6.8CA and 1.5SMC6.8CA, the P4SMA6.8CAHM3_A/H delivers identical clamping performance in the smallest qualified surface-mount package, making it optimal for automotive and portable industrial designs where PCB area, weight, and AEC-Q101 compliance are jointly constrained.
Availability
P4SMA6.8CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, AEC-Q101 traceability, and consistent DO-214AC form factor.
Supply support for P4SMA6.8CAHM3_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 application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-designed to meet stringent AEC-Q101, UL 497B, and IEC 61000-4-x standards with minimal footprint and predictable clamping behavior.
FAQ
What is the exact breakdown voltage range for P4SMA6.8CAHM3_A/H?
The P4SMA6.8CAHM3_A/H has a guaranteed breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping onset across production lots and supports precise overvoltage margin design in 5 V systems where the P4SMA6.8CAHM3_A/H is commonly deployed.
Is P4SMA6.8CAHM3_A/H unidirectional or bidirectional?
The P4SMA6.8CAHM3_A/H is a bidirectional transient voltage suppressor, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities with identical VBR, VWM, and VC specifications-making it ideal for protecting AC-coupled or differential signal lines such as RS-485, CAN, and audio interfaces without polarity concerns during PCB layout.
Does P4SMA6.8CAHM3_A/H meet automotive qualification standards?
Yes, the "HM3" suffix in P4SMA6.8CAHM3_A/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22-A114, confirming suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of P4SMA6.8CAHM3_A/H under surge conditions?
The P4SMA6.8CAHM3_A/H clamps to a maximum of 10.5 V at 38.1 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Can P4SMA6.8CAHM3_A/H be used in place of a unidirectional TVS like P4SMA6.8A?
No-P4SMA6.8CAHM3_A/H is strictly bidirectional and not interchangeable with unidirectional variants like P4SMA6.8A. The latter has a cathode band and conducts only in reverse bias; substituting them risks forward conduction, excessive leakage, or failure to clamp negative transients. Always match the "A" (unidirectional) or "CA" (bidirectional) suffix to the circuit's polarity requirements.
P4SMA6.8CAHM3_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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38.1A
- 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)
P4SMA6.8CAHM3_A/H FAQ
1.How can I place an order for P4SMA6.8CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/H reliable?
The price and inventory of P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CAHM3_A/H?
P4SMA6.8CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/H?
For technical support, including P4SMA6.8CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA6.8CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CAHM3_A/H?
All P4SMA6.8CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA6.8CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8CAHM3_A/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 …
