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Vishay General Semiconductor - Diodes Division P4SMA91CAHM3_A/H
- Part No.:
- P4SMA91CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CAHM3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,737
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Product details
Overview
P4SMA91CAHM3_A/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 and power lines. It features a 91 V breakdown voltage (VBR min/max = 86.5 V / 95.5 V at 1 mA), 77.8 V standoff voltage (VWM), 125 V maximum clamping voltage (VC) at 3.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA91CAHM3_A/H datasheet, P4SMA91CAHM3_A/H pinout, P4SMA91CAHM3_A/H application, or P4SMA91CAHM3_A/H equivalent, this device is selected for robust ESD and surge immunity in bidirectional DC/AC circuits where low-profile SMT placement, AEC-Q101 qualification, and halogen-free RoHS compliance are required.
Technical Context
The P4SMA91CAHM3_A/H operates as a symmetrical avalanche diode, conducting equally in both directions above its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 µs transients up to 400 W (derated to 300 W above 91 V).
It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), supports automated placement, and is qualified to AEC-Q101 for automotive-grade reliability. Thermal resistance is RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), with operating junction temperature range of –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines precise symmetric avalanche onset for reliable bidirectional clamping |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 125 V at 3.2 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 400 W (≤91 V), 300 W (>91 V) - peak transient energy absorption capability per JEDEC standard |
| IPPM | 3.2 A - maximum non-repetitive peak pulse current supported at rated VC |
| TJ Range | –65 °C to +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMA (DO-214AC) - 5.28 mm × 4.50 mm footprint, compatible with standard SMT reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for global OEM production without compromising surge robustness |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; supports high-volume automated assembly with 260 °C peak reflow |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| 400 W 10/1000 µs pulse rating | Provides margin against common industrial surge events (IEC 61000-4-5 level 3/4) on 12 V/24 V rails |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of protection ICs or interface ICs. Use Value: Limits transient voltage to ≤125 V during 3.2 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor front-ends. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-induced surges from solenoid coils, motor drives, and relay contacts. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC I/O lines, coordinated with series impedance and filtering components. Use Value: Absorbs 400 W pulses without degradation, maintaining signal integrity and reducing false triggering in noisy factory environments. |
| Telecom Power Rail Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports and base station power supplies against lightning-induced surges on primary DC input rails. IC Role / Device Role / Timing Role: First-line TVS device on bulk DC input, preceding DC-DC converters and hot-swap controllers. Use Value: Clamps 10/1000 µs surges to 125 V while sustaining 300–400 W peak power, extending system MTBF in outdoor telecom deployments. |
Use Scenario: Shielding USB Type-C receptacles and barrel-jack inputs in smart home hubs and portable audio devices from ESD and accidental AC adapter misconnection. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed directly at connector entry point, before EMI filters and LDOs. Use Value: Withstands ±30 kV contact ESD (IEC 61000-4-2) and limits clamping voltage below IC absolute maximum ratings without adding signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Higher package thermal mass (SMB/DO-214AA); 90 V VBR, 124 V VC @ 3.5 A; 600 W PPPM | Better suited for higher-energy surges but requires larger PCB area (5.3 mm × 4.6 mm vs. 5.28 mm × 4.50 mm) | Select when board space allows and >400 W surge margin is needed; not drop-in due to different pad layout |
| SMCJ91CA | Larger SMC (DO-214AB) package; identical VBR/VC specs but 1500 W PPPM; RθJA = 35 °C/W (lower thermal resistance) | Used in high-power industrial SMPS and solar inverters where sustained surge duty cycles occur | Choose for thermally demanding environments or multi-pulse stress; incompatible footprint requires layout change |
Compared with SMBJ90CA and SMCJ91CA, the P4SMA91CAHM3_A/H delivers optimal balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint - making it preferred for space-constrained automotive and consumer designs where 400 W surge handling suffices.
Availability
P4SMA91CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supply designs requiring stable component supply, AEC-Q101 traceability, and halogen-free manufacturing compliance.
Supply support for P4SMA91CAHM3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications systems - delivering standardized TVS performance in compact, qualified, and environmentally compliant packages.
FAQ
What does the "CA" suffix indicate in P4SMA91CAHM3_A/H?
The "CA" suffix in P4SMA91CAHM3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity applied across its terminals. This is essential for protecting AC-coupled or floating signal lines where polarity reversal may occur during surge events.
Is P4SMA91CAHM3_A/H suitable for automotive applications?
Yes, P4SMA91CAHM3_A/H is AEC-Q101 qualified (as indicated by the HM3 suffix) and rated for operating junction temperatures from –65 °C to +150 °C. It is specifically intended for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces where robust transient immunity and long-term reliability under thermal cycling are mandatory.
What is the maximum clamping voltage of P4SMA91CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA91CAHM3_A/H is 125 V at a peak pulse current (IPPM) of 3.2 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does P4SMA91CAHM3_A/H require polarity-aware PCB layout?
No - P4SMA91CAHM3_A/H is a bidirectional TVS diode with symmetrical terminals and no polarity marking on the SMA package. The device functions identically regardless of orientation on the PCB, simplifying layout and eliminating risk of reverse installation during automated assembly.
How does the HM3 suffix differ from E3 or M3 in P4SMA91CAHM3_A/H?
The HM3 suffix in P4SMA91CAHM3_A/H indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. In contrast, E3 is RoHS-compliant but commercial-grade only, and M3 adds halogen-free content without automotive qualification. Only HM3 guarantees compliance with both environmental and automotive reliability standards for P4SMA91CAHM3_A/H.
P4SMA91CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA91CAHM3_A/H FAQ
1.How can I place an order for P4SMA91CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CAHM3_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 P4SMA91CAHM3_A/H reliable?
The price and inventory of P4SMA91CAHM3_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 P4SMA91CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA91CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CAHM3_A/H?
P4SMA91CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CAHM3_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 P4SMA91CAHM3_A/H?
For technical support, including P4SMA91CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA91CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA91CAHM3_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 P4SMA91CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA91CAHM3_A/H?
All P4SMA91CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CAHM3_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 P4SMA91CAHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA91CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA91CAHM3_A/H Tags
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