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Vishay General Semiconductor - Diodes Division P4SMA68CAHM3/H
- Part No.:
- P4SMA68CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68CAHM3/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,893
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Product details
Overview
P4SMA68CAHM3/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 or power lines. It features 68 V breakdown voltage (VBR min/max = 64.6 V / 71.4 V), 58.1 V standoff voltage (VWM), 92.0 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor line protection per AEC-Q101 qualification.
For engineers reviewing the P4SMA68CAHM3/H datasheet, P4SMA68CAHM3/H pinout, P4SMA68CAHM3/H application, or P4SMA68CAHM3/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction - all critical for ESD/surge protection design-in and automotive-grade BOM validation.
Technical Context
The P4SMA68CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 10/1000 µs surge response supports IEC 61000-4-5 Level 3 compliance when properly laid out.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient, on standard 0.2" × 0.2" copper pads) and RθJL = 30 °C/W (junction-to-lead), enabling reliable operation up to TJ = +150 °C. The device is rated for 400 W peak pulse power below 91 V and derates to 300 W above 91 V per Fig. 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - Ensures consistent avalanche initiation across production lots; tested at 1.0 mA IT |
| VWM | 58.1 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 92.0 V at 4.3 A - Clamped voltage during 10/1000 µs surge; defines worst-case downstream voltage stress |
| PPPM | 400 W - Peak surge power handling capability under standardized waveform; validates robustness against lightning-induced surges |
| IPPM | 4.3 A - Peak pulse current corresponding to VC; used to size PCB trace width and layout thermal relief |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments |
| Package | SMA (DO-214AC) - Surface-mount outline with 0.208" length, compatible with automated pick-and-place and reflow |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0; matte tin-plated leads solderable per J-STD-002; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Terminal where transient current enters during positive half-cycle; identical electrical behavior to cathode due to bidirectional structure |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Terminal where transient current exits during positive half-cycle; functionally interchangeable with anode for clamping in either polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL level 1 and JESD 201 class 2 whisker resistance requirements |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit) / 2 kV (short-circuit) with proper PCB layout |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD > 15 kV contact discharge) |
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and low leakage (<1 µA) over temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Lines |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs in automotive door modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt surge energy before reaching transceiver IC. Use Value: Maintains signal integrity by limiting transient voltage to ≤92.0 V, preventing latch-up or permanent damage to 5 V tolerant CAN PHYs. |
Use Scenario: Guarding RS-485/CAN FD physical layer lines in factory automation PLCs subjected to motor switching noise. IC Role / Device Role / Timing Role: Fast-response TVS placed differential-mode across A/B bus lines to suppress common-mode surges induced by nearby VFDs. Use Value: Enables reliable communication up to 5 Mbps by clamping transients within 1 ns, with <1 µA leakage preserving bus DC bias. |
| Consumer USB Power Delivery | Telecom DSL Line Interface |
Use Scenario: Safeguarding USB-C CC and VBUS lines in portable chargers against ESD and hot-plug voltage spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS (58.1 V) placed upstream of buck converter input to absorb 15 kV HBM ESD events. Use Value: Prevents false overvoltage shutdowns in PMICs by clamping transients below 92.0 V without affecting 20 V PD negotiation. |
Use Scenario: Protecting ADSL/VDSL line drivers in residential gateways from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at line entry point, coordinated with gas discharge tube (GDT) secondary protection. Use Value: Handles 400 W surge energy while maintaining <1 pF junction capacitance to avoid signal attenuation above 30 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Higher VWM (55.1 V), lower VC (103 V @ 3.9 A), SMB package (larger footprint) | Lower clamping ratio (VC/VBR ≈ 1.61 vs. 1.43), less suitable for tight 5 V rail margins | Select when board space allows larger SMB package and higher surge margin is needed beyond 400 W |
| 1.5KE68CA | Through-hole DO-201 package, same VBR/VC, 1500 W rating but slower response due to higher parasitic inductance | Not suitable for high-frequency signal lines; limited to power rail or chassis-level protection | Choose only for legacy through-hole designs or where manual assembly is required and layout inductance is non-critical |
Compared with SMBJ64CA and 1.5KE68CA, the P4SMA68CAHM3/H offers superior high-frequency surge response due to its low-inductance SMA package, tighter VBR tolerance (±5%), and AEC-Q101 qualification - making it the preferred choice for new automotive and high-speed data line designs requiring surface-mount reliability and precise clamping.
Availability
P4SMA68CAHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial communications, consumer power delivery, and telecom infrastructure requiring stable component supply with halogen-free, AEC-Q101-qualified TVS protection.
Supply support for P4SMA68CAHM3/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, automotive qualification, and high-volume manufacturability.
The P4SMA Series is engineered for robust transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance, low leakage, and repeatable clamping performance are mandatory.
FAQ
What is the meaning of the "HM3" and "/H" suffixes in P4SMA68CAHM3/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification; the "/H" denotes packaging in 7-inch plastic tape and reel (1800 units per reel). This full ordering code confirms the device meets automotive-grade reliability standards and environmental compliance requirements - essential for P4SMA68CAHM3/H deployment in Tier-1 automotive supply chains.
Does P4SMA68CAHM3/H have polarity markings on the package?
No, P4SMA68CAHM3/H is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) case. Its symmetrical construction allows installation in either orientation on the PCB - unlike unidirectional variants (e.g., P4SMA68A) which feature a cathode band. This simplifies layout and eliminates orientation errors during automated assembly of P4SMA68CAHM3/H.
What is the maximum clamping voltage VC for P4SMA68CAHM3/H and under what test condition?
The maximum clamping voltage VC for P4SMA68CAHM3/H is 92.0 V, measured at a peak pulse current IPPM of 4.3 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is guaranteed across the full operating temperature range of −65 °C to +150 °C for P4SMA68CAHM3/H.
How does the thermal resistance of P4SMA68CAHM3/H affect PCB layout?
P4SMA68CAHM3/H has RθJA = 120 °C/W (junction-to-ambient) when mounted on 0.2" × 0.2" copper pads per datasheet Fig. 2. To maintain TJ ≤ 150 °C during repetitive surges, designers must provide adequate copper area and minimize trace length - especially for high-duty-cycle applications. Thermal vias under the pads further reduce effective RθJA, directly improving P4SMA68CAHM3/H long-term reliability.
Is P4SMA68CAHM3/H suitable for protecting high-speed data lines like USB 3.0 or HDMI?
No, P4SMA68CAHM3/H is not optimized for high-speed data lines due to its junction capacitance (~100 pF at VWM), which would severely attenuate signals above ~100 MHz. It is intended for lower-frequency signal lines (e.g., CAN, LIN, RS-485) and power rails. For USB 3.0 or HDMI, low-capacitance TVS arrays (e.g., <0.5 pF) are required - P4SMA68CAHM3/H serves best where clamping voltage and surge power take precedence over bandwidth.
P4SMA68CAHM3/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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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)
P4SMA68CAHM3/H FAQ
1.How can I place an order for P4SMA68CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68CAHM3/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 P4SMA68CAHM3/H reliable?
The price and inventory of P4SMA68CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA68CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68CAHM3/H?
P4SMA68CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68CAHM3/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 P4SMA68CAHM3/H?
For technical support, including P4SMA68CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68CAHM3/H requirements.
6.How does Aetrix verify that P4SMA68CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA68CAHM3/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 P4SMA68CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA68CAHM3/H?
All P4SMA68CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68CAHM3/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 P4SMA68CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA68CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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