My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA91A-E3/5A
- Part No.:
- P4SMA91A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91A-E3/5A.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,823
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA91A-E3/5A 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), 77.8 V maximum standoff voltage (VWM), and clamps to 125 V at 3.2 A peak pulse current (IPPM) under 10/1000 µs waveform - used for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P4SMA91A-E3/5A datasheet, P4SMA91A-E3/5A pinout, P4SMA91A-E3/5A application, or P4SMA91A-E3/5A equivalent, key selection criteria include unidirectional polarity, 400 W peak pulse power rating (derated to 300 W above 91 V), RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
The P4SMA91A-E3/5A operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its VBR threshold. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while fast response time (<1 ns) enables suppression of ESD and inductive switching spikes before sensitive downstream components are damaged.
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. The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and dissipates 3.3 W continuously at TA = 50 °C on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 86.5–95.5 V at 1.0 mA test current - defines precise avalanche initiation point for repeatable clamping |
| Standoff Voltage VWM | 77.8 V maximum - ensures no conduction during normal 72–75 V DC rail operation |
| Clamping Voltage VC | 125 V at 3.2 A (10/1000 µs) - limits transient voltage seen by protected IC to safe margin below absolute max ratings |
| Peak Pulse Power PPPM | 400 W (≤91 V), 300 W (>91 V) - sustains single high-energy surges without failure under standard test waveform |
| Reverse Leakage ID | <1.0 µA at VWM - negligible standby power loss and no interference with high-impedance signal paths |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly; 5.28 mm × 4.50 mm body, 2.54 mm lead pitch |
| Operating Temperature | −65 °C to +150 °C - supports deployment in automotive engine compartments and industrial outdoor enclosures |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode indicated by band on one end; terminals are anode and cathode (unidirectional), with polarity critical for correct circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground or lower-potential rail during overvoltage event |
| Anode | Reference/return path | Typically tied to system ground or common return; completes current path during clamping operation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients from relay coil snubbing or lightning-induced surges without degradation |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning or baking |
| AEC-Q101 qualified variant available | Enables drop-in use in automotive powertrain and body electronics where reliability validation is mandatory |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from solenoid valves and BLDC motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side switch output and ground to clamp negative flyback voltage. Use Value: Limits transient voltage to ≤125 V, preventing latch-up or oxide rupture in 100 V-rated MOSFETs and 5 V MCU GPIOs. |
Use Scenario: Safeguarding LIN bus transceivers and door module sensors from load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators feeding microcontrollers. Use Value: Withstands 300 W pulses per ISO 7637-2 Pulse 5a, maintaining VWM margin above 14 V nominal battery voltage. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage surge protection for AC/DC adapters and PoE-powered devices exposed to mains-borne transients. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC bus (e.g., 48 V telecom rail) before DC-DC converters. Use Value: Clamps 1 kV/0.5 J surges to <125 V within <1 ns, preserving input capacitor and controller IC reliability. |
Use Scenario: ESD and EFT protection on user interface buttons, display backlight drivers, and relay control outputs. IC Role / Device Role / Timing Role: Localized TVS on 5 V or 3.3 V supply traces feeding touch controllers and LED drivers. Use Value: Sub-µA leakage avoids battery drain in standby; 125 V clamping prevents damage to 16 V-rated capacitors and 5 V logic. |
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 (Bourns) | Same VWM (77.5 V), higher IPPM (3.3 A), SMB package (larger footprint, 3.5 mm × 4.6 mm) | Requires PCB layout change; better thermal dissipation but incompatible with tight SMA layouts | Select when higher surge margin or legacy SMB footprint is required; not pin-compatible with P4SMA91A-E3/5A |
| 1.5SMC91A (ON Semiconductor) | Identical VBR/VWM/VC, same SMA package, but rated for 1500 W peak power (10/1000 µs) and higher IPPM (13.1 A) | Over-spec'd for most 400 W use cases; may increase cost and board space without functional benefit | Choose only if design requires >400 W surge handling; otherwise P4SMA91A-E3/5A offers optimal cost-performance balance |
Compared with SMBJ90A and 1.5SMC91A, the P4SMA91A-E3/5A delivers precise 400 W surge capability in the smallest standardized SMA footprint, with verified 1.0 µA leakage at VWM and full RoHS compliance - making it ideal for space-constrained, high-volume industrial and consumer designs where exact power rating alignment matters.
Availability
P4SMA91A-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, telecom power inputs, and consumer appliance control boards requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for P4SMA91A-E3/5A 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, precision, and high-volume manufacturability.
The P4SMA91A-E3/5A belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, low-leakage transient suppression in surface-mount power and signal line protection across automotive, industrial, and communications systems.
FAQ
What is the maximum clamping voltage of the P4SMA91A-E3/5A under standard test conditions?
The P4SMA91A-E3/5A clamps to a maximum of 125 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 3.2 A. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream components during surge events - critical for ensuring compatibility with 150 V-rated capacitors or 130 V absolute maximum voltage limits of protected ICs. The P4SMA91A-E3/5A maintains this clamping performance across its full operating temperature range.
Is the P4SMA91A-E3/5A suitable for automotive applications?
The P4SMA91A-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under ordering codes like P4SMA91AHE3_A. These variants undergo stress testing per automotive reliability standards and are approved for use in body electronics, infotainment, and ADAS subsystems. For non-automotive designs, the P4SMA91A-E3/5A provides identical electrical specs and RoHS compliance - always verify qualification status using the full part number before automotive deployment.
What does the "E3/5A" suffix indicate in P4SMA91A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability requirements. The "/5A" specifies packaging: 7500 units per 13-inch diameter plastic tape-and-reel - optimized for high-speed pick-and-place assembly. This differs from "/61", which indicates 1800 units per 7-inch reel. Both share identical electrical and thermal specifications; only packaging and quantity differ.
How does the P4SMA91A-E3/5A compare to bidirectional TVS diodes like P4SMA91CA?
The P4SMA91A-E3/5A is unidirectional and must be oriented with cathode toward the protected line to function correctly, whereas P4SMA91CA is bidirectional and symmetrical - suitable for AC lines or differential signals. The P4SMA91A-E3/5A offers tighter VBR tolerance (±5%) and lower leakage (<1.0 µA) than its bidirectional counterpart (typically ±10%, ~5 µA). Use P4SMA91A-E3/5A for DC rails with defined polarity; choose P4SMA91CA only when polarity reversal or AC coupling is present.
What is the thermal resistance of the P4SMA91A-E3/5A, and how does it affect layout?
The P4SMA91A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2" per terminal), and 30 °C/W junction-to-lead (RθJL). To maintain TJ ≤ 150 °C under 3.3 W continuous dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical in enclosed industrial enclosures. The P4SMA91A-E3/5A's low RθJL allows efficient heat transfer to adjacent ground planes via its leads.
P4SMA91A-E3/5A 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91A-E3/5A FAQ
1.How can I place an order for P4SMA91A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91A-E3/5A 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 P4SMA91A-E3/5A reliable?
The price and inventory of P4SMA91A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA91A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91A-E3/5A?
P4SMA91A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91A-E3/5A 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 P4SMA91A-E3/5A?
For technical support, including P4SMA91A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91A-E3/5A requirements.
6.How does Aetrix verify that P4SMA91A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA91A-E3/5A 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 P4SMA91A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA91A-E3/5A?
All P4SMA91A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91A-E3/5A, 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 P4SMA91A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA91A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA91A-E3/5A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
