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Vishay General Semiconductor - Diodes Division P4SMA91AHM3/H
- Part No.:
- P4SMA91AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91AHM3/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,894
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Product details
Overview
P4SMA91AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 77.8 V standoff voltage (VWM), clamps to ≤125 V at 3.2 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 P4SMA91AHM3/H datasheet, P4SMA91AHM3/H pinout, P4SMA91AHM3/H application, or P4SMA91AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMA (DO-214AC) surface-mount package, low clamping ratio (VC/VBR ≈ 1.31), and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
The P4SMA91AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and surge events. Its clamping behavior follows standardized 10/1000 µs waveform testing per ANSI/IEEE C62.35, with derating above 25 °C per Figure 2 and thermal impedance defined in Figure 5.
It is rated for 150 °C maximum junction temperature, supports 40 A non-repetitive forward surge (8.3 ms half-sine), and exhibits a +0.106 %/°C temperature coefficient of VBR. Polarity is marked by a cathode band; no marking applies to bidirectional variants - but this part is explicitly unidirectional per device marking "91A" and ordering code suffix "H".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable avalanche initiation range for consistent clamping onset |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤125 V at 3.2 A (10/1000 µs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 400 W peak pulse power - sustains single high-energy transients without failure under standard test conditions |
| IFSM | 40 A peak forward surge - withstands 8.3 ms half-sine inrush without degradation (unidirectional only) |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on 0.2" × 0.2" copper pads, critical for power derating |
| TJ max | 150 °C - maximum allowable junction temperature, defining upper thermal operating limit |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VC |
| Anode (unmarked end) | Reference node | Typically tied to system ground or lower-potential rail; completes conduction path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for industrial and automotive production without brominated flame retardants |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients common in motor drives, power supplies, and telecom line interfaces |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream components during suppression events |
| MSL Level 1 (J-STD-020) | Unlimited floor life at ≤30 °C/60 % RH; compatible with standard SMT reflow up to 260 °C peak |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V automotive power rails from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps surges up to 125 V while maintaining <1 µA leakage at 77.8 V, preserving low-quiescent-current design integrity. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC modules from field-induced ESD. IC Role / Device Role / Timing Role: Point-of-entry TVS on 4–20 mA or 0–10 V signal traces before ADC input stage. Use Value: Sub-1 ns response ensures transient energy is shunted before reaching sensitive front-end amplifiers or isolation barriers. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails against lightning-induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Secondary-level TVS after primary GDT or MOV, placed directly at IC supply pins. Use Value: 400 W rating enables coordination with upstream protectors while limiting let-through voltage to safe IC thresholds. |
Use Scenario: Overvoltage clamp on AC-DC adapter secondary-side DC bus feeding USB-C PD controllers. IC Role / Device Role / Timing Role: Unidirectional suppressor between rectifier output and bulk capacitor input. Use Value: Withstands repetitive 300 W surges above 91 V and maintains stable VBR across -65 °C to +150 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Higher IPPM (4.3 A), same VWM (77 V), SMB package (larger footprint, RθJA = 85 °C/W) | Better thermal performance in high-duty-cycle environments; requires larger PCB area | Select when higher surge repetition rate or improved thermal dissipation is required over space-constrained layouts |
| 1.5SMC91A | Same VBR/VWM, 1500 W PPPM, SMC (DO-214AB) package, higher IFSM (100 A) | Designed for higher-energy industrial transients; not AEC-Q101 qualified | Choose for non-automotive applications needing greater single-pulse margin without AEC validation |
Compared with SMBJ90A and 1.5SMC91A, the P4SMA91AHM3/H offers optimal balance of AEC-Q101 compliance, halogen-free construction, and compact SMA footprint - making it preferred for space-limited automotive and industrial designs where regulatory alignment and board real estate are critical.
Availability
P4SMA91AHM3/H is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom line protection, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA91AHM3/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 infrastructure - delivering standardized surge immunity in compact, AEC-Q101-qualified surface-mount packages.
FAQ
What is the breakdown voltage tolerance of the P4SMA91AHM3/H?
The P4SMA91AHM3/H has a specified breakdown voltage range of 86.5 V to 95.5 V at test current IT = 1.0 mA, representing ±5 % tolerance around the nominal 91 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes from -65 °C to +150 °C.
Is the P4SMA91AHM3/H suitable for automotive applications?
Yes, the P4SMA91AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it appropriate for engine control units, body electronics, and ADAS power rail protection.
What does the "HM3" suffix mean in P4SMA91AHM3/H?
The "HM3" suffix in P4SMA91AHM3/H denotes halogen-free, RoHS-compliant packaging with JESD 201 Class 2 whisker resistance, MSL Level 1 moisture sensitivity, and compatibility with lead-free reflow up to 260 °C peak. The trailing "/H" indicates 7-inch tape-and-reel packaging (1800 units per reel).
How does the clamping voltage of P4SMA91AHM3/H compare to its breakdown voltage?
The P4SMA91AHM3/H clamps to a maximum of 125 V at 3.2 A (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.31 using the typical VBR of 95.5 V. This low ratio ensures minimal overvoltage exposure to protected ICs while maintaining robust surge handling capability.
Can P4SMA91AHM3/H be used in bidirectional configurations?
No, the P4SMA91AHM3/H is a unidirectional TVS diode, as confirmed by its "A" suffix (not "CA") and device marking "91A". Bidirectional operation requires CA-suffixed parts like P4SMA91CA; using P4SMA91AHM3/H in reverse-biased AC applications would result in forward conduction and potential failure.
P4SMA91AHM3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
P4SMA91AHM3/H FAQ
1.How can I place an order for P4SMA91AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91AHM3/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 P4SMA91AHM3/H reliable?
The price and inventory of P4SMA91AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA91AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91AHM3/H?
P4SMA91AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91AHM3/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 P4SMA91AHM3/H?
For technical support, including P4SMA91AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91AHM3/H requirements.
6.How does Aetrix verify that P4SMA91AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA91AHM3/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 P4SMA91AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA91AHM3/H?
All P4SMA91AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91AHM3/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 P4SMA91AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA91AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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