My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC30AHE3/57T
- Part No.:
- 3KASMC30AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHE3/57T.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,478
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC30AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 30 V stand-off voltage, 33.3–36.8 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - deployed for automotive-grade ESD and surge protection on power rails and signal lines of MOSFETs and sensors.
For engineers reviewing the 3KASMC30AHE3/57T datasheet, 3KASMC30AHE3/57T pinout, 3KASMC30AHE3/57T application, or 3KASMC30AHE3/57T equivalent, key selection criteria include clamping voltage (48.4 V at 62 A), unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, and thermal resistance (RθJA = 77.5 °C/W) under standard SMT mounting conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range. Its 3000 W peak pulse power handling with 10/1000 µs waveform and low incremental surge resistance enable robust protection against inductive switching transients and lightning-induced surges.
The device exhibits fast response time (<1 ns), low leakage (<1 µA at 30 V, <15 µA at TJ = 150 °C), and meets JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements - confirming suitability for high-reliability automotive and industrial PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 µs) - Sustains high-energy transients without failure; supports ISO 7637-2 Pulse 5a/b compliance in automotive designs. |
| VC @ IPPM | 48.4 V at 62 A - Clamping voltage limits downstream IC stress; enables use with 40 V-rated MOSFETs and controllers. |
| TJ max | +185 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard reflow without baking prior to assembly. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0 flammability rating and RoHS compliance (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path; forms clamping loop with cathode. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 24 V rail or sensor signal); absorbs surge energy into ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and leakage over lifetime and temperature. |
| High-temperature capability | Rated for continuous operation up to +185 °C junction temperature - eliminates thermal derating in engine control units. |
| Low clamping ratio | VC/VWM = 1.61 - Minimizes overvoltage exposure to downstream components compared to typical 1.8–2.2 ratios. |
| Fast transient response | <1 ns turn-on - Captures sub-microsecond ESD and switching spikes before sensitive logic or analog circuits are affected. |
| Robust surge current | IFSM = 200 A (8.3 ms half-sine) - Withstands repeated load-dump events in 12/24 V vehicle electrical systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in engine control modules (ECMs) against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input, conducting surge current to chassis ground. Use Value: Limits peak voltage to ≤48.4 V, preventing damage to 40 V-input buck converters and microcontrollers without requiring series impedance. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground, shunting ESD and cable discharge events. Use Value: Maintains signal integrity with <1 µA leakage at 30 V and clamps transients within 1 ns - no measurable offset or noise injection during normal operation. |
| Telecom DC Power Input Protection | Computer Peripheral USB VBUS Protection |
|
Use Scenario: Securing -48 V DC input of telecom base station power supplies against lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Primary unidirectional TVS on input stage, coordinated with upstream MOVs and downstream filtering. Use Value: Delivers 3000 W pulse handling with 77.5 °C/W RθJA, enabling reliable operation without heatsinking in compact 1U chassis. |
Use Scenario: Adding secondary overvoltage protection on USB 2.0 VBUS lines in docking stations exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Standby TVS parallel to USB port, activated only during >30 V overvoltage events (e.g., faulty wall adapter). Use Value: Prevents latch-up in USB controller ICs by clamping to 48.4 V before internal 5.5 V absolute maximum is exceeded. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same DO-214AC (SMA) package; lower PPPM = 400 W; VC = 48.4 V at 8.3 A; RθJA ≈ 110 °C/W | Limited to low-energy transients (e.g., board-level ESD); unsuitable for automotive load dump or industrial surges. | Select when cost sensitivity outweighs surge robustness and thermal constraints allow higher ambient rise. |
| 1.5KE30A | Through-hole DO-201AE package; PPPM = 1500 W; VC = 48.4 V at 31 A; not AEC-Q101 qualified | Requires manual or wave soldering; lacks automotive qualification and MSL Level 1 reflow compatibility. | Choose only for legacy through-hole designs where SMT space is unavailable and automotive certification is not required. |
Compared with SMAJ30A and 1.5KE30A, the 3KASMC30AHE3/57T delivers 7.5× higher pulse power than SMAJ30A and 2× higher than 1.5KE30A while maintaining identical clamping voltage - enabling single-device protection for demanding automotive and industrial surge profiles without layout redesign.
Availability
3KASMC30AHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC input protection requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC30AHE3/57T 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 optoelectronics with emphasis on reliability, high-temperature operation, and automotive qualification.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial systems - prioritizing thermal stability, surge robustness, and SMT manufacturability over cost-optimized consumer-grade alternatives.
FAQ
What is the clamping voltage of the 3KASMC30AHE3/57T and how is it verified?
The 3KASMC30AHE3/57T has a maximum clamping voltage (VC) of 48.4 V at 62 A peak pulse current (IPPM) with a 10/1000 µs waveform, as measured per ANSI/IEEE C62.35. This value is confirmed in the Electrical Characteristics table on page 2 of Vishay document 89962 and validated under standardized surge testing conditions - ensuring repeatable protection behavior across production lots and temperature ranges.
Is the 3KASMC30AHE3/57T suitable for automotive applications?
Yes, the 3KASMC30AHE3/57T is AEC-Q101 qualified and rated for continuous operation up to +185 °C junction temperature, making it suitable for under-hood and powertrain applications. Its DO-214AB (SMC) package meets MSL Level 1 and JESD22-B102 solderability standards - fully supporting automated SMT assembly in automotive electronics manufacturing.
What does the 'HE3/57T' suffix indicate in 3KASMC30AHE3/57T?
The 'HE3/57T' suffix denotes Vishay's packaging configuration: 'HE3' identifies the HM3 base part (RoHS-compliant, AEC-Q101 qualified), and '/57T' specifies 7-inch plastic tape-and-reel delivery with 850 units per reel. This matches the ordering information on page 2 of document 89962 and confirms full traceability and process control for production use.
How does the thermal resistance of the 3KASMC30AHE3/57T affect its power handling?
The 3KASMC30AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout. This allows sustained 6.0 W power dissipation at TL = 75 °C and supports full 3000 W pulse capability without thermal runaway - critical for protecting high-current automotive loads where heatsinking is impractical.
Can the 3KASMC30AHE3/57T replace older TVS diodes like P6KE30A in existing designs?
The 3KASMC30AHE3/57T is not a direct drop-in replacement for P6KE30A due to different packages (DO-214AB vs. DO-15) and higher surge ratings. While both share VWM = 30 V and similar VC, the 3KASMC30AHE3/57T requires SMT layout changes and offers superior 3000 W pulse handling versus P6KE30A's 600 W - necessitating system-level validation for revised surge immunity claims.
3KASMC30AHE3/57T 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
3KASMC30AHE3/57T FAQ
1.How can I place an order for 3KASMC30AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHE3/57T 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 3KASMC30AHE3/57T reliable?
The price and inventory of 3KASMC30AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC30AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHE3/57T?
3KASMC30AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHE3/57T 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 3KASMC30AHE3/57T?
For technical support, including 3KASMC30AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC30AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHE3/57T 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 3KASMC30AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHE3/57T?
All 3KASMC30AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHE3/57T, 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 3KASMC30AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC30AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHE3/57T 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 …
