My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA6.8CAHE3/61
- Part No.:
- P4SMA6.8CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CAHE3/61.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,758
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA6.8CAHE3/61 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 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), 38.1 A peak pulse current (IPPM), and 10.5 V maximum clamping voltage (VC) - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P4SMA6.8CAHE3/61 datasheet, P4SMA6.8CAHE3/61 pinout, P4SMA6.8CAHE3/61 application, or P4SMA6.8CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR = 1.54), 1000 µA max reverse leakage at VWM, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions per JESD22-A114 test conditions. Its glass-passivated junction ensures stable VBR tolerance (±5% min/max), low incremental surge resistance, and fast response time (<1 ns) to ESD and lightning-induced transients.
The device is rated for 150 °C maximum junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 for automotive under-hood and body electronics. Thermal resistance is 120 °C/W (junction-to-ambient) on standard PCB pad layout, enabling reliable operation without heatsinking in typical 3.3 W steady-state dissipation scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise voltage threshold where avalanche conduction begins in either polarity |
| VWM | 5.8 V - maximum continuous working voltage before leakage exceeds 1000 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 10.5 V at 38.1 A - clamped voltage during 400 W transient, limiting downstream IC stress to sub-11 V |
| IPPM | 38.1 A - peak surge current survivable under 10/1000 µs waveform, validated per IEC 61000-4-5 |
| PPPM | 400 W - transient power handling capacity, derated linearly above 25 °C ambient per Fig. 2 |
| TJ max | +150 °C - enables use in engine control units, motor drives, and industrial enclosures without thermal derating penalties |
| AEC-Q101 | Qualified - certified for automotive applications including ABS, ADAS sensors, and infotainment power rails |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded epoxy case meeting UL 94 V-0 flammability rating; 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 | Transient return path (bidirectional) | Provides symmetrical conduction path for positive and negative surges; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA devices; forms low-impedance clamp loop with anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485, sensor bridges) without polarity concerns |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) on 50 Ω source impedance |
| AEC-Q101 qualification | Validated for automotive temperature cycling (-40 °C to +125 °C), humidity storage, and mechanical shock per AEC specification |
| Low clamping ratio (VC/VBR) | 1.54 - minimizes voltage overshoot during clamping, protecting 5 V logic and analog front-ends with tight margins |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, compatible with standard SMT production lines |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and 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 clamping element placed directly at connector entry point to shunt surge energy before reaching ASIC or MCU pins. Use Value: Limits transient voltage to ≤10.5 V, preserving integrity of 5 V tolerant transceivers and preventing latch-up in microcontroller GPIOs. |
Use Scenario: Safeguarding PLC digital input modules and analog acquisition channels against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with upstream fuses and filtering capacitors. Use Value: Survives repeated 400 W transients without degradation, ensuring >10-year field reliability in harsh electromagnetic environments. |
| Consumer Power Adapter Output | Telecom Line Card Protection |
Use Scenario: Secondary-side transient suppression on USB-C PD and 12 V wall adapter outputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-response clamp between VBUS and GND, activated within <1 ns to limit overshoot during plug-in transients. Use Value: Maintains output regulation by clamping to 10.5 V, preventing damage to connected devices' USB PHYs and PMICs. |
Use Scenario: Protection of Ethernet PHYs and DSL line drivers against lightning-induced surges on RJ-45 ports in residential gateways and base stations. IC Role / Device Role / Timing Role: First-stage bidirectional suppressor on differential pairs, preceding common-mode chokes and secondary TVS arrays. Use Value: Provides 38.1 A surge current handling with 10.5 V clamping, meeting GR-1089-CORE Level 3 telecom immunity requirements. |
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 peak pulse power, larger SMB (DO-214AA) package (4.6 mm × 3.6 mm vs. SMA's 4.3 mm × 2.6 mm) | Better suited for higher-energy surges but requires larger PCB footprint and different pad layout | Select when system-level surge testing exceeds 400 W or when thermal margin must be increased beyond 120 °C/W |
| 1.5KE6.8CA | Through-hole TO-218 package, 1500 W peak pulse power, higher VC (12.6 V), slower response due to parasitic inductance | Used in legacy power supply designs and high-reliability military systems where board space is unconstrained | Choose only for through-hole manufacturing or when legacy BOM compatibility outweighs SMT efficiency and clamping performance |
Compared with SMBJ6.8CA and 1.5KE6.8CA, P4SMA6.8CAHE3/61 delivers optimal balance of compact size, AEC-Q101 compliance, and precise 10.5 V clamping - making it the preferred choice for space-constrained automotive and industrial SMT designs requiring repeatable sub-11 V protection.
Availability
P4SMA6.8CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapter outputs, and telecom line card protection requiring stable component supply across extended production lifecycles.
Supply support for P4SMA6.8CAHE3/61 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive and industrial electronics, emphasizing AEC-Q101 qualification, SMT manufacturability, and consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage tolerance for P4SMA6.8CAHE3/61?
The P4SMA6.8CAHE3/61 has a specified breakdown voltage range of 6.45 V to 7.14 V at 10 mA test current, representing ±5% tolerance around the nominal 6.8 V rating. This tight VBR distribution ensures predictable clamping onset across production lots and supports robust design margins in 5 V system protection. The value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay P4SMA datasheet revision 09-Jan-2024.
Is P4SMA6.8CAHE3/61 suitable for automotive applications?
Yes, P4SMA6.8CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It passes temperature cycling, humidity storage, and mechanical shock tests required for under-hood and body electronics. Its 150 °C maximum junction temperature, MSL Level 1 reflow rating, and bidirectional clamping make P4SMA6.8CAHE3/61 appropriate for CAN/LIN transceivers, sensor signal conditioning, and power rail protection in vehicles.
What is the maximum clamping voltage of P4SMA6.8CAHE3/61 under surge conditions?
The maximum clamping voltage (VC) of P4SMA6.8CAHE3/61 is 10.5 V at 38.1 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage seen at the device terminals during worst-case transient events. It directly determines the protection level delivered to downstream 5 V ICs connected to the same line.
Does P4SMA6.8CAHE3/61 have polarity markings on the package?
No, P4SMA6.8CAHE3/61 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., P4SMA6.8A), the CA version functions identically in both directions and carries no cathode band or other orientation indicators. PCB layout must treat both terminals as electrically symmetric, with equal trace routing and pad geometry to maintain balanced surge response.
What is the thermal resistance of P4SMA6.8CAHE3/61 in standard mounting conditions?
The typical thermal resistance junction-to-ambient (RθJA) for P4SMA6.8CAHE3/61 is 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air convection and is used to calculate junction temperature rise under steady-state power dissipation. For example, at 3.3 W continuous power, ΔTJ ≈ 396 °C - confirming that P4SMA6.8CAHE3/61 is intended for transient-only duty, not continuous operation.
P4SMA6.8CAHE3/61 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8CAHE3/61 FAQ
1.How can I place an order for P4SMA6.8CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CAHE3/61 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 P4SMA6.8CAHE3/61 reliable?
The price and inventory of P4SMA6.8CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8CAHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CAHE3/61?
P4SMA6.8CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CAHE3/61 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 P4SMA6.8CAHE3/61?
For technical support, including P4SMA6.8CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CAHE3/61 requirements.
6.How does Aetrix verify that P4SMA6.8CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CAHE3/61 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 P4SMA6.8CAHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CAHE3/61?
All P4SMA6.8CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CAHE3/61, 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 P4SMA6.8CAHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA6.8CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8CAHE3/61 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 …
