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Vishay General Semiconductor - Diodes Division P4SMA91AHE3/61
- Part No.:
- P4SMA91AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91AHE3/61.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,796
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Product details
Overview
P4SMA91AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 125 V maximum clamping voltage (VC) at 3.2 A peak pulse current (IPPM), and 400 W peak pulse power rating (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA91AHE3/61 datasheet, P4SMA91AHE3/61 pinout, P4SMA91AHE3/61 application, or P4SMA91AHE3/61 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and validated automotive-grade qualification status - all critical for ESD and lightning transient protection design validation.
Technical Context
The P4SMA91AHE3/61 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages and low incremental surge resistance for stable clamping. Its 125 V clamping voltage at 3.2 A ensures robust protection of 90–100 V rail systems without overstressing downstream components.
Thermal performance is defined by RθJA = 120 °C/W (junction-to-ambient, on minimum pad layout) and RθJL = 30 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. Derating above 25 °C ambient follows Fig. 2 in the datasheet, with 300 W peak power applied above 91 V standoff.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines precise avalanche onset window for predictable clamping threshold |
| 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) - clamping voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W (≤91 V), 300 W (>91 V) - peak transient energy absorption capability under standard waveform |
| IFSM | 40 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 77.8 V rail); conducts when VAK ≥ VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 77.8 V systems |
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics per stress test requirements |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal cycling |
| Low profile SMA package | Supports automated SMT assembly and fits high-density PCB layouts with minimal Z-height impact |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow compatibility without dry-pack requirements |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground to clamp spikes above 77.8 V. Use Value: Limits transient voltage to ≤125 V, preventing damage to MCU power inputs and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential signal pair or single-ended output to ground. Use Value: Sub-1 ns response prevents latch-up in op-amps and ADC front-ends during ±8 kV contact ESD. |
| Telecom DC Power Input Protection | Consumer Device USB Power Rail Protection |
Use Scenario: Safeguarding PoE-powered equipment input stages from induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter input filter. Use Value: Absorbs 400 W surges while maintaining VC below 125 V, preserving converter overvoltage immunity. |
Use Scenario: Adding secondary surge margin to USB-C VBUS lines in portable chargers and docks. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and chassis ground near connector. Use Value: Clamps 100 V transients to 125 V within 1 ns, meeting IEC 61000-4-2 Level 4 without affecting 5–20 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91A-E3/52 | Higher 600 W PPPM, SMB (DO-214AA) package, same VBR range and VC (125 V) | Requires larger PCB footprint; better suited for higher-energy surges where space permits | Select when >400 W surge margin is required and board area allows SMB outline |
| 1.5SMC91A | Same VBR/VC, but SMC (DO-214AB) package, 1500 W PPPM, higher IPPM (12.3 A) | Designed for industrial mains-level protection; not AEC-Q101 qualified | Choose for non-automotive, high-energy AC/DC front-end protection where qualification is not mandatory |
Compared with SMBJ91A-E3/52 and 1.5SMC91A, the P4SMA91AHE3/61 offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and 400 W surge capability - making it the preferred choice for space-constrained automotive and industrial DC rail protection where qualification and manufacturability are critical.
Availability
P4SMA91AHE3/61 is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, telecom DC inputs, and consumer USB power rails requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA91AHE3/61 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA91AHE3/61 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications systems where AEC-Q101 qualification and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of P4SMA91AHE3/61 under a 10/1000 µs surge?
The P4SMA91AHE3/61 clamps to a maximum of 125 V when subjected to its rated peak pulse current of 3.2 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and reflects worst-case voltage seen by protected circuitry during surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is P4SMA91AHE3/61 suitable for automotive applications?
Yes, P4SMA91AHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock, and is rated for operation from –65 °C to +150 °C junction temperature - making it appropriate for engine control units, body electronics, and ADAS power domains.
What is the standoff voltage (VWM) of P4SMA91AHE3/61, and why does it matter?
The standoff voltage VWM of P4SMA91AHE3/61 is 77.8 V - the maximum continuous reverse voltage it can block without exceeding 1.0 µA leakage. This value ensures reliable operation on 72–75 V nominal systems (e.g., 24 V automotive with 3× load dump margin) while providing sufficient headroom below VBR to prevent false triggering during normal operation.
Does P4SMA91AHE3/61 have a bidirectional variant?
No, P4SMA91AHE3/61 is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., P4SMA91CA). The "A" in P4SMA91AHE3/61 denotes unidirectional configuration, with polarity marked by a cathode band. For AC-coupled or symmetrical transient protection, P4SMA91CAHE3/61 would be the correct selection.
What is the thermal resistance of P4SMA91AHE3/61, and how does it affect layout?
P4SMA91AHE3/61 has a typical junction-to-ambient thermal resistance RθJA of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must provide these minimum pad areas and avoid excessive trace length or isolation - otherwise, thermal derating will reduce effective surge capability.
P4SMA91AHE3/61 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91AHE3/61 FAQ
1.How can I place an order for P4SMA91AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91AHE3/61 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 P4SMA91AHE3/61 reliable?
The price and inventory of P4SMA91AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91AHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA91AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91AHE3/61?
P4SMA91AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91AHE3/61 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 P4SMA91AHE3/61?
For technical support, including P4SMA91AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91AHE3/61 requirements.
6.How does Aetrix verify that P4SMA91AHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA91AHE3/61 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 P4SMA91AHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA91AHE3/61?
All P4SMA91AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91AHE3/61, 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 P4SMA91AHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA91AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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