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Vishay General Semiconductor - Diodes Division P4SMA68AHM3_A/H
- Part No.:
- P4SMA68AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68AHM3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,158
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Product details
Overview
P4SMA68AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V at IT = 1.0 mA), 58.1 V standoff voltage (VWM), clamps to ≤92.0 V at 4.3 A peak pulse current (IPPM), and delivers 400 W peak pulse power (10/1000 µs waveform) - ideal for safeguarding MOSFETs, ICs, and sensor interfaces against inductive switching transients.
For engineers reviewing the P4SMA68AHM3_A/H datasheet, P4SMA68AHM3_A/H pinout, P4SMA68AHM3_A/H application, or P4SMA68AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, SMA (DO-214AC) package thermal resistance (RθJA = 120 °C/W), and verified clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for fast response (<1 ns) and low incremental surge resistance. Its design targets transient suppression in automotive and industrial environments where reliability under repeated 10/1000 µs surges up to 400 W (derated above TA = 25 °C) is critical.
The device meets MSL Level 1 per J-STD-020 (peak reflow temperature 260 °C), supports automated placement, and is rated for TJ = –65 to +150 °C operation. Its 3.3 W steady-state power dissipation (PD) and 40 A non-repetitive forward surge capability (IFSM, 8.3 ms half-sine) define its thermal and surge handling envelope in PCB-constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at IT = 1.0 mA - defines reliable conduction onset under controlled test conditions |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤92.0 V at IPPM = 4.3 A - clamping voltage limiting downstream component stress during surge |
| PPPM | 400 W (10/1000 µs waveform) - peak transient energy absorption capacity under standard surge profile |
| IFSM | 40 A (8.3 ms half-sine) - single-event surge current rating for unidirectional forward conduction |
| TJ max. | +150 °C - maximum junction temperature defining safe operating area under power dissipation |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to protected line's lower-potential side; reverse-biased during normal operation |
| Cathode | Forward current exit / surge sink | Marked by band; connected to ground or reference rail to shunt transient energy away from load |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity, and surge endurance |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and automotive production without brominated flame retardants |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA at VWM) across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; peak temperature tolerance up to 260 °C |
| 400 W peak pulse power (10/1000 µs) | Provides robust protection against common lightning-induced and inductive-switching transients in 24 V systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control units (ECUs) and body electronics from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy to ground before it reaches downstream DC-DC converters or microcontrollers. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic supplies by limiting voltage to ≤92.0 V during 400 W surges. |
Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, or analog sensor outputs) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed directly at connector entry points to divert sub-100 ns transients. Use Value: Maintains signal integrity by holding clamped voltage below IC absolute maximum ratings while supporting >1 kV ESD immunity. |
| Telecom Power Supply Input | Consumer Device USB/Power Port |
Use Scenario: Safeguarding AC/DC adapter inputs and PoE-powered equipment front-ends against surges on mains-connected lines. IC Role / Device Role / Timing Role: Primary-level transient suppressor upstream of input rectifiers and bulk capacitors. Use Value: Absorbs 400 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV) surge immunity. |
Use Scenario: Overvoltage protection on USB-C PD input ports and external power adapters in laptops and portable devices. IC Role / Device Role / Timing Role: Standoff-rated (58.1 V) clamping device that remains inactive during 20 V PD negotiation but activates on fault. Use Value: Enables safe operation with 20 V USB PD profiles while suppressing accidental 48 V or higher transients to <92 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/5A | Same VBR range (64.6–71.4 V), identical SMA package, but commercial-grade (not AEC-Q101 qualified); RθJA = 120 °C/W same | Lacks automotive qualification; suitable for industrial/commercial designs without AEC-Q101 mandate | Select when cost sensitivity outweighs automotive reliability requirements and no vehicle deployment is planned |
| SMCJ68A-HM3 | Higher peak power (1500 W), same VBR/VWM, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm vs. SMA's 4.50 mm × 2.79 mm) | Used where higher surge margin is needed and board space allows larger footprint | Choose only if system-level surge testing requires >400 W capability and PCB layout accommodates SMC package |
Compared with SMAJ68A-E3/5A, P4SMA68AHM3_A/H adds AEC-Q101 qualification and halogen-free compliance for automotive use; compared with SMCJ68A-HM3, it trades surge capacity for compact size and lower thermal mass - making it optimal for space-constrained, automotive-grade 24 V rail protection.
Availability
P4SMA68AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer USB-C PD interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA68AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping, AEC-Q101 validation, and surface-mount compatibility for automated manufacturing.
FAQ
What is the breakdown voltage tolerance for P4SMA68AHM3_A/H?
The P4SMA68AHM3_A/H has a specified breakdown voltage (VBR) range of 64.6 V to 71.4 V at a test current of 1.0 mA, representing ±5% tolerance around the nominal 68 V rating. This tight VBR window ensures predictable clamping behavior in 24 V systems where overvoltage thresholds must remain within defined safety margins. The P4SMA68AHM3_A/H maintains this specification across its qualified operating temperature range.
Is P4SMA68AHM3_A/H suitable for automotive applications?
Yes, P4SMA68AHM3_A/H is explicitly AEC-Q101 qualified (indicated by the HM3 suffix) and halogen-free, meeting automotive reliability standards for temperature cycling, mechanical shock, and surge endurance. Its construction - including glass-passivated junction, MSL Level 1 rating, and 150 °C max junction temperature - validates its use in engine compartments, ADAS modules, and body control units where sustained thermal and electrical stress is expected. The P4SMA68AHM3_A/H is designed for such environments.
What is the maximum clamping voltage of P4SMA68AHM3_A/H under surge conditions?
The P4SMA68AHM3_A/H clamps to a maximum of 92.0 V at its rated peak pulse current of 4.3 A (IPPM) under the standardized 10/1000 µs waveform. This clamping voltage is guaranteed across production lots and temperature extremes, ensuring downstream components like 75 V-rated MOSFETs or 60 V-input DC-DC controllers remain within safe operating limits. The P4SMA68AHM3_A/H achieves this with low incremental surge resistance and fast response.
Does P4SMA68AHM3_A/H have a bidirectional variant?
No, P4SMA68AHM3_A/H is strictly unidirectional, as confirmed by its part number suffix "A" and cathode-band marking. Bidirectional variants in the P4SMA family use the "CA" suffix (e.g., P4SMA68CA). The P4SMA68AHM3_A/H is intended for DC line protection where polarity is fixed - such as 24 V supply rails - and must be oriented with the cathode toward the protected circuit's ground reference to function correctly.
What is the thermal resistance of P4SMA68AHM3_A/H, and how does it affect PCB layout?
The P4SMA68AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2", or 5.0 mm × 5.0 mm per terminal). This value directly impacts steady-state power handling: at 3.3 W dissipation, junction temperature rise could exceed 396 °C without adequate copper area - hence the datasheet mandates specific pad sizing. Layouts using the P4SMA68AHM3_A/H must follow Vishay's recommended mounting pad dimensions to ensure thermal reliability and avoid premature failure.
P4SMA68AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA68AHM3_A/H FAQ
1.How can I place an order for P4SMA68AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68AHM3_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 P4SMA68AHM3_A/H reliable?
The price and inventory of P4SMA68AHM3_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 P4SMA68AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA68AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68AHM3_A/H?
P4SMA68AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68AHM3_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 P4SMA68AHM3_A/H?
For technical support, including P4SMA68AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA68AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA68AHM3_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 P4SMA68AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA68AHM3_A/H?
All P4SMA68AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68AHM3_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 P4SMA68AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA68AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA68AHM3_A/H Tags
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