My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 5KASMC40AHM3_A/H
- Part No.:
- 5KASMC40AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC40AHM3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,561
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
5KASMC40AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 40 V stand-off voltage (VWM), 46.8 V nominal breakdown (VBR), 5000 W peak pulse power (10/1000 μs), 64.5 V maximum clamping voltage (VC) at 77.5 A IPPM, and 185 °C junction temperature - deployed for automotive sensor line protection against inductive switching transients.
For engineers reviewing the 5KASMC40AHM3_A/H datasheet, 5KASMC40AHM3_A/H pinout, 5KASMC40AHM3_A/H application, or 5KASMC40AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), unidirectional polarity, and SMC package compatibility with high-reliability automotive PCB layouts.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping across -65 °C to +185 °C operating range, with low incremental surge resistance and fast response time critical for protecting MOSFETs and ICs from ESD and load-dump events. Its 0.092 %/°C VBR temperature coefficient ensures predictable breakdown shift over temperature.
The device is optimized for single-polarity transient suppression on power rails and signal lines where reverse conduction must be blocked; it does not support bidirectional operation and requires cathode-band orientation during placement. Mounting on minimum recommended pad layout yields RθJA = 100 °C/W, while infinite heatsink mounting achieves RθJM = 20.8 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (min/typ/max) | 44.4 / 46.8 / 49.1 V at 1 mA - defines reliable turn-on threshold under DC bias |
| VC @ IPPM | 64.5 V at 77.5 A - clamping voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM (10 × 1000 μs) | 5000 W - peak transient energy absorption capability without failure |
| TJ max. | +185 °C - enables use in under-hood automotive environments without derating |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard PCB pad layout |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during positive transients relative to anode |
| Anode | Cathode of internal PN junction | Typically tied to ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage (<2 μA at VWM) and long-term reliability under thermal cycling |
| High-temperature operation | Rated up to TJ = +185 °C supports placement near powertrain ECUs and motor drivers |
| Peak pulse power | 5000 W (10/1000 μs) handles ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| Clamping efficiency | Low VC/VBR ratio (~1.37) minimizes voltage overshoot during fast transients |
| Manufacturing compliance | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical systems |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input stages. Use Value: Limits clamping voltage to 64.5 V at 77.5 A, preventing damage to 3.3 V/5 V interface ICs while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding gate driver inputs and feedback sensing nodes in variable-frequency drives exposed to relay switching noise and back-EMF. IC Role / Device Role / Timing Role: Standoff-rated TVS on isolated control signal paths to suppress sub-microsecond spikes without affecting PWM timing integrity. Use Value: Fast response time and low RSURGE ensure clamping occurs within nanoseconds, preserving signal fidelity during high-dV/dt events. |
| Telecom Power Rail Protection | Computer PSU Output Lines |
Use Scenario: Shielding 48 V DC distribution lines in base station power modules from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, coordinated with upstream MOVs and fuses. Use Value: 5000 W PPPM rating sustains multiple 10/1000 μs surges without degradation, supporting GR-1089-CORE compliance. |
Use Scenario: Guarding +12 V and +5 V output rails in ATX PSUs against cross-regulation faults and capacitor discharge events. IC Role / Device Role / Timing Role: Secondary-level TVS positioned after DC-DC converters to absorb residual ripple and transient coupling. Use Value: 40 V VWM aligns with 12 V rail tolerance; 64.5 V VC prevents latch-up in downstream VRMs and memory controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A | Lower PPPM (400 W), higher RθJA (150 °C/W), same SMC package and VWM | Not AEC-Q101 qualified; suitable only for commercial-grade consumer/industrial use | Select when cost sensitivity outweighs automotive reliability and surge margin requirements |
| SMCJ40A | Same 5000 W PPPM and AEC-Q101 qualification, but VBR min = 44.4 V (identical), VC = 64.5 V (identical), RθJA = 100 °C/W (identical) | Identical electrical specs and qualification; differs only in branding and traceability documentation | Valid alternative if supply chain diversification or dual-sourcing is required without design change |
Compared with SMAJ40A and SMCJ40A, the 5KASMC40AHM3_A/H delivers identical clamping and thermal performance to SMCJ40A while offering superior surge margin versus SMAJ40A - making it optimal for automotive front-end protection where sustained 5 kW pulse handling and 185 °C operation are mandatory.
Availability
5KASMC40AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive inputs, telecom power rail protection, and computer PSU output lines requiring stable component supply with full AEC-Q101 traceability and extended temperature capability.
Supply support for 5KASMC40AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 5KASMC40AHM3_A/H belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for robust transient suppression in harsh automotive and industrial environments where thermal stability and surge endurance are critical.
FAQ
What is the maximum clamping voltage of the 5KASMC40AHM3_A/H under a 10/1000 μs surge?
The 5KASMC40AHM3_A/H has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current (IPPM) of 77.5 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - a key parameter for ensuring safe operation of 48 V-tolerant interfaces and 3.3 V/5 V logic inputs protected by this device.
Is the 5KASMC40AHM3_A/H qualified for automotive applications?
Yes, the 5KASMC40AHM3_A/H is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and mechanical shock - all required for automotive electronic components. Its 185 °C maximum junction temperature and halogen-free, RoHS-compliant SMC package further support deployment in engine control units, body electronics, and ADAS sensor modules where long-term reliability under thermal and vibration stress is essential.
What does the "HM3_A/H" suffix indicate in 5KASMC40AHM3_A/H?
The "HM3_A/H" suffix in 5KASMC40AHM3_A/H specifies packaging and revision: "HM3" denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance; "A" is the revision code per Vishay's internal documentation; "H" indicates 7-inch plastic tape-and-reel packaging with 850 units per reel. This full suffix ensures traceability to material composition, manufacturing lot, and delivery format - critical for automotive PPAP submissions and production line setup.
How does the thermal resistance of the 5KASMC40AHM3_A/H affect PCB layout?
The 5KASMC40AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on Vishay's minimum recommended pad layout. To maintain safe operation below 185 °C junction temperature, PCB copper area and via count must be designed to dissipate 6.5 W continuously - especially under sustained surge conditions. Increasing copper area or adding thermal vias reduces effective RθJA, directly improving surge survivability and long-term reliability in high-temperature environments.
Can the 5KASMC40AHM3_A/H replace a bidirectional TVS in existing designs?
No, the 5KASMC40AHM3_A/H is unidirectional only and cannot replace a bidirectional TVS without circuit redesign. It conducts only during positive transients relative to its cathode; negative excursions beyond VWM will not be clamped. If bidirectional protection is required - such as for AC-coupled data lines or differential buses - a separate bidirectional device like SMBJ40CA or layout-level changes (e.g., back-to-back configuration) would be necessary. Always verify polarity alignment and transient directionality before substitution.
5KASMC40AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 77.5A
- Power - Peak Pulse:
- 5000W (5kW)
- 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 (SMC)
5KASMC40AHM3_A/H FAQ
1.How can I place an order for 5KASMC40AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC40AHM3_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 5KASMC40AHM3_A/H reliable?
The price and inventory of 5KASMC40AHM3_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 5KASMC40AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC40AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC40AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC40AHM3_A/H?
5KASMC40AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC40AHM3_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 5KASMC40AHM3_A/H?
For technical support, including 5KASMC40AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC40AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC40AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC40AHM3_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 5KASMC40AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC40AHM3_A/H?
All 5KASMC40AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC40AHM3_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 5KASMC40AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC40AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC40AHM3_A/H 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
