My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC22HE3/57T
- Part No.:
- 3KASMC22HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22HE3/57T.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC22HE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of power rails and signal lines in engine control units and ADAS sensor interfaces.
For engineers reviewing the 3KASMC22HE3/57T datasheet, 3KASMC22HE3/57T pinout, 3KASMC22HE3/57T application, or 3KASMC22HE3/57T equivalent, key selection criteria include clamping voltage (35.5 V at IPPM), AEC-Q101 qualification, MSL Level 1 rating, unidirectional polarity, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB mounting conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across -65 °C to +185 °C operating range. Its 10/1000 μs waveform response delivers 84.5 A peak pulse current (IPPM) with low incremental surge resistance and fast transient response - critical for suppressing load-dump spikes and inductive switching transients in 12 V automotive systems.
The device operates exclusively in unidirectional mode, with cathode denoted by color band, and is optimized for high-reliability applications requiring JESD22-B102-compliant solderability and JESD201 Class 2 whisker resistance. It meets UL 94 V-0 flammability and RoHS compliance per Vishay's HM3 base P/N designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Voltage at which device enters avalanche conduction; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 35.5 V at 84.5 A IPPM - Peak voltage seen by protected circuit during worst-case 3000 W surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 3000 W (10/1000 μs) - Surge energy handling capacity; validates suitability for ISO 7637-2 Pulse 5a/b load-dump events |
| TJ max | +185 °C - Enables operation in under-hood environments without derating; supports AEC-Q101 automotive qualification |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient on standard pad layout; informs board-level thermal design requirements |
| Polarity | Unidirectional - Requires correct orientation relative to DC rail polarity; cathode marked by band |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Completes current path during reverse-biased transient clamping; must be routed with low-inductance trace |
| Cathode | High-side connection to protected line (e.g., battery rail or signal line) | Marked by color band; connects to node requiring overvoltage protection; defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use per stress test requirements including HTGB, HTRB, and TCT |
| Junction passivation | Stable leakage and breakdown characteristics over lifetime and temperature extremes (-65 °C to +185 °C) |
| MSL Level 1 (260 °C peak) | Compatible with standard SMT reflow profiles without moisture sensitivity concerns |
| 3000 W peak pulse power | Withstands severe load-dump transients in 12 V vehicle electrical systems per ISO 16750-2 |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during surge events, reducing stress on downstream ICs and MOSFETs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protection of 12 V supply rail against alternator load-dump transients (ISO 16750-2 Pulse 5a, up to 120 V/400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits rail voltage to ≤35.5 V during 3000 W surges, preventing damage to LDOs and microcontrollers rated for 36 V absolute maximum. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, mounted directly at connector entry point. Use Value: Clamps 1 kV/1.2 × 50 μs transients to <40 V within nanoseconds, preserving signal integrity and enabling robust 3–30 V logic detection. |
| ADAS Camera Sensor Interface | Telecom Power Supply Input |
Use Scenario: Shielding FPD-Link III or GMSL serial data lines and associated 3.3 V bias rails from ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized TVS on coaxial power+data feed near image sensor module PCB edge. Use Value: Sub-1 ns response time and 35.5 V clamping prevent latch-up or damage to serializer/deserializer ICs with 3.6 V absolute max ratings. |
Use Scenario: Secondary-stage surge suppression on 48 V telecom rectifier output feeding PoE midspans and base station controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to absorb repetitive lightning-induced surges. Use Value: 200 A IFSM rating and 185 °C TJ capability ensure long-term reliability in sealed, high-ambient-temperature enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Lower PPPM (400 W), same DO-214AC (SMA) package, VBR 24.4–26.9 V, VC = 35.5 V at 11.8 A | Not AEC-Q101 qualified; limited to consumer/industrial use; insufficient for automotive load-dump | Select only for cost-sensitive non-automotive designs where surge energy is ≤400 W |
| SMCJ22A | Same DO-214AB (SMC) package, identical VWM/VBR/VC specs, but rated for 1500 W PPPM (10/1000 μs) and not AEC-Q101 qualified | Lacks automotive qualification and 3000 W capability; suitable for industrial power supplies but not under-hood ECUs | Choose when AEC-Q101 is unnecessary and peak surge energy remains below 1500 W |
Compared with SMAJ22A and SMCJ22A, the 3KASMC22HE3/57T provides triple the peak pulse power (3000 W), guaranteed AEC-Q101 qualification, and extended 185 °C junction rating - making it the only option among the three validated for high-energy, high-temperature automotive transients.
Availability
3KASMC22HE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, ADAS camera interface hardening, and telecom 48 V power supply surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 3KASMC22HE3/57T 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 MOSFETs with emphasis on reliability, high-temperature operation, and automotive qualification.
The 3KASMC series is part of Vishay's PAR® (Protection and Regulation) family, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC22HE3/57T at its rated peak pulse current?
The 3KASMC22HE3/57T has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 84.5 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on the protected circuit during worst-case transient events. The 3KASMC22HE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC22HE3/57T qualified for automotive applications?
Yes, the 3KASMC22HE3/57T is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT) required for automotive electronics. Its 185 °C maximum junction temperature and DO-214AB (SMC) package with MSL Level 1 rating further validate its suitability for under-hood and ADAS applications.
What does the "HM3/57T" suffix indicate in 3KASMC22HE3/57T?
The "HM3" suffix denotes Vishay's RoHS-compliant, AEC-Q101-qualified base P/N configuration with JESD201 Class 2 whisker resistance and J-STD-002/JESD22-B102 solderability. The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units - standard for automated SMT placement. The "E3" reflects the specific revision level per Vishay's internal documentation.
Can the 3KASMC22HE3/57T be used in bidirectional configurations?
No, the 3KASMC22HE3/57T is strictly unidirectional, as confirmed in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. It conducts only during reverse-biased avalanche and must be oriented with the cathode band toward the protected line. For bidirectional protection, a separate device such as the SMBJ22CA or a back-to-back unidirectional pair would be required - the 3KASMC22HE3/57T itself does not support symmetrical clamping.
What is the thermal resistance of the 3KASMC22HE3/57T under standard mounting conditions?
The 3KASMC22HE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's DO-214AB outline drawing. This value assumes no additional copper pour or thermal vias; actual RθJA improves significantly with enhanced PCB copper area and thermal via arrays beneath the cathode/anode pads.
3KASMC22HE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 76.1A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
3KASMC22HE3/57T FAQ
1.How can I place an order for 3KASMC22HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22HE3/57T 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 3KASMC22HE3/57T reliable?
The price and inventory of 3KASMC22HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC22HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC22HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22HE3/57T?
3KASMC22HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22HE3/57T 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 3KASMC22HE3/57T?
For technical support, including 3KASMC22HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22HE3/57T requirements.
6.How does Aetrix verify that 3KASMC22HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC22HE3/57T 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 3KASMC22HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC22HE3/57T?
All 3KASMC22HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22HE3/57T, 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 3KASMC22HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC22HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC22HE3/57T 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 …
