My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMP12A-E3/84A
~~2.jpg)
- Part No.:
- SMP12A-E3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP12A-E3/84A.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,149
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMP12A-E3/84A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for clamping voltage transients on power and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 μs), 20.1 A peak pulse current (IPPM), and 19.9 V maximum clamping voltage (VC) - deployed in consumer, industrial, and telecom electronics for IC and MOSFET protection.
For engineers reviewing the SMP12A-E3/84A datasheet, SMP12A-E3/84A pinout, SMP12A-E3/84A application, or SMP12A-E3/84A equivalent, this page delivers verified electrical parameters, DO-220AA package details, clamping performance under surge conditions, and real-world ESD/lightning transient protection use cases.
Technical Context
The SMP12A-E3/84A operates as a unidirectional avalanche diode with fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of inductive switching spikes and lightning-induced surges. Its thermal design supports continuous operation up to TJ = 150 °C, with RθJA = 250 °C/W and RθJL = 50 °C/W.
It is rated for 40 A non-repetitive forward surge current (IFSM, 10 ms half-sine), exhibits 2.5 V max forward voltage at 25 A, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature - confirming suitability for high-volume automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - reverse stand-off voltage; defines maximum continuous operating voltage before leakage exceeds 1 μA. |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - ensures reliable avalanche conduction onset within tight tolerance for predictable clamping. |
| VC @ IPPM | 19.9 V at 20.1 A - clamping voltage during 10/1000 μs surge; limits downstream voltage stress to safe levels. |
| PPPM | 400 W - peak pulse power handling capability under standardized 10/1000 μs waveform; enables robust transient absorption. |
| IFSM | 40 A - single half-sine surge rating (10 ms); supports high-energy fault events without bond wire failure. |
| TJ max. | +150 °C - maximum junction temperature; allows operation in hot industrial or enclosed environments. |
Pinout & Package
Package: SMP (DO-220AA), ultra-low-profile surface-mount case with 1.0 mm typical height, matte tin-plated leads, halogen-free and RoHS-compliant (M3 suffix), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit terminal during forward conduction; marked with color band | Connected to higher-potential side (e.g., VCC rail or signal line); defines directionality and clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Peak pulse power | 400 W (10/1000 μs) - sustains high-energy transients without degradation in compact DO-220AA footprint. |
| Clamping ratio (VC/VWM) | 1.66 - low ratio ensures minimal overvoltage exposure to protected ICs during surge events. |
| Response time | <1 ns - enables suppression before sensitive circuitry experiences damaging overvoltage. |
| Thermal reliability | MSL Level 1, 260 °C peak reflow - guarantees compatibility with standard lead-free SMT processes without delamination. |
| Leakage control | ≤1 μA at VWM - prevents excessive standby current in battery-powered or low-power sensor nodes. |
Applications
| USB Power Line Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting 5 V USB VBUS lines from hot-plug induced transients and ESD events in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp surges before reaching USB controller or power switch IC. Use Value: Limits VBUS overshoot to ≤19.9 V during 20.1 A surge, preserving USB compliance and preventing latch-up in connected devices. |
Use Scenario: Safeguarding microcontroller GPIO inputs receiving signals from door lock actuators and window switches. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input line to absorb inductive kickback from relay coils and motor drivers. Use Value: Withstands 40 A IFSM surges and clamps at 19.9 V, ensuring MCU input pins remain below absolute maximum ratings during load dump events. |
| Industrial Sensor Signal Conditioning | Telecom Ethernet PHY Interface |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter outputs) from field wiring transients in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) unidirectional TVS on signal path to preserve accuracy while blocking surges. Use Value: Maintains signal integrity with <1 μA reverse leakage at 12 V, while clamping fast transients before op-amp or ADC input stages. |
Use Scenario: Protecting RJ45 magnetics secondary side and PHY differential pairs from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on TX+/TX− and RX+/RX− lines referenced to local ground plane. Use Value: 400 W pulse rating and 19.9 V VC enable compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV) surge immunity testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP12A-M3/84A | Same electrical specs and DO-220AA package; differs only in halogen-free/RoHS-compliant M3 plating vs. E3 matte tin. | No functional difference; M3 variant adds whisker resistance (JESD 201 Class 2) and stricter material compliance. | Select SMP12A-M3/84A for automotive or high-reliability industrial programs requiring whisker mitigation. |
| SMAJ12A | Same VWM (12 V) and VC (20.1 V), but larger SMA (DO-214AC) package (2.4 mm height), lower PPPM (400 W same), higher RθJA (300 °C/W). | Less suitable for ultra-thin designs; requires larger PCB area and has reduced thermal margin in dense layouts. | Choose SMAJ12A only when legacy SMA footprint compatibility is mandatory and board height >1.0 mm is acceptable. |
Compared with SMP12A-E3/84A, the SMP12A-M3/84A offers identical protection performance with enhanced process reliability, while SMAJ12A trades compactness and thermal efficiency for broader industry familiarity - making SMP12A-E3/84A optimal for space-constrained, high-density SMT designs requiring 1.0 mm profile and MSL-1 reflow compatibility.
Availability
SMP12A-E3/84A is available at Aetrix Electronics and suitable for USB power delivery systems, automotive body electronics, industrial sensor interfaces, and telecom PHY protection requiring stable component supply and consistent surge immunity performance.
Supply support for SMP12A-E3/84A 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, precision, and high-volume manufacturability.
The eSMP® Series, including SMP12A-E3/84A, was engineered for ultra-low-profile transient suppression in space-constrained consumer, computing, and industrial electronics - prioritizing surge robustness, automated placement compatibility, and thermal resilience.
FAQ
What is the clamping voltage of SMP12A-E3/84A under a 10/1000 μs surge?
The SMP12A-E3/84A has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current of 20.1 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 25-Apr-2022. The SMP12A-E3/84A maintains this clamping performance across its specified operating temperature range.
Is SMP12A-E3/84A unidirectional or bidirectional?
SMP12A-E3/84A is a unidirectional Transient Voltage Suppressor, as explicitly stated in the Vishay datasheet under "PRIMARY CHARACTERISTICS" and "FEATURES". Its polarity is marked by a cathode band, and it conducts only when the cathode is at a higher potential than the anode - making it suitable for DC power rail and single-polarity signal line protection.
What package does SMP12A-E3/84A use, and what are its key mechanical attributes?
SMP12A-E3/84A uses the SMP (DO-220AA) package: a surface-mount case with 1.0 mm typical height, 0.142" × 0.086" outline, matte tin-plated leads, and UL 94 V-0 molding compound. It meets MSL Level 1 and supports 260 °C peak reflow, per J-STD-020. The SMP12A-E3/84A footprint is optimized for high-speed automated placement and space-constrained PCB layouts.
Does SMP12A-E3/84A meet RoHS and halogen-free requirements?
SMP12A-E3/84A is RoHS-compliant and halogen-free per Vishay's material categorization policy (www.vishay.com/doc?99912). While the E3 suffix denotes standard matte tin plating, the device satisfies EU RoHS Directive 2011/65/EU and is compatible with lead-free soldering processes - confirmed by its MSL Level 1 rating and J-STD-002/JESD 22-B102 solderability certification.
What is the maximum operating junction temperature for SMP12A-E3/84A?
The SMP12A-E3/84A has a maximum operating junction temperature (TJ max.) of +150 °C, as specified in the "MAXIMUM RATINGS" table of the Vishay datasheet. This rating enables reliable operation in high-temperature environments such as engine compartments, enclosed industrial enclosures, and thermally dense PCB assemblies - provided thermal design accounts for RθJA = 250 °C/W.
SMP12A-E3/84A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 20.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-220AA (SMP)
SMP12A-E3/84A FAQ
1.How can I place an order for SMP12A-E3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP12A-E3/84A 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 SMP12A-E3/84A reliable?
The price and inventory of SMP12A-E3/84A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP12A-E3/84A is usually 5 days.
3.What payment methods are accepted for SMP12A-E3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP12A-E3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP12A-E3/84A?
SMP12A-E3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP12A-E3/84A 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 SMP12A-E3/84A?
For technical support, including SMP12A-E3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP12A-E3/84A requirements.
6.How does Aetrix verify that SMP12A-E3/84A is sourced from the original manufacturer or authorized distributors?
All SMP12A-E3/84A 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 SMP12A-E3/84A meets industry standards.
7.What is the process for return or replacement of SMP12A-E3/84A?
All SMP12A-E3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP12A-E3/84A, 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 SMP12A-E3/84A part is unused and in its original packaging.
Return procedure for SMP12A-E3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP12A-E3/84A 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 …
