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Vishay General Semiconductor - Diodes Division 5KASMC33AHM3_A/I
- Part No.:
- 5KASMC33AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC33AHM3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,928
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Product details
Overview
5KASMC33AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 33 V stand-off voltage (VWM), 38.7 V nominal breakdown (VBR), 5000 W peak pulse power (10/1000 μs), 93.8 V clamping voltage at 50 A surge current, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 5KASMC33AHM3_A/I datasheet, 5KASMC33AHM3_A/I pinout, 5KASMC33AHM3_A/I application, or 5KASMC33AHM3_A/I equivalent, this page delivers verified electrical specs, thermal performance at TJ = 185 °C, SMC package mechanical data, and direct alternatives for ESD/surge protection in high-reliability signal lines and power rails.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time under transient overvoltage events. Its junction temperature rating of 185 °C and MSL Level 1 qualification support operation in under-hood automotive environments and industrial control systems with sustained thermal stress.
The device operates unidirectionally with a cathode band marking, exhibits 0.091 %/°C temperature coefficient of VBR, and maintains stable clamping performance across -65 °C to +185 °C junction temperature range while meeting UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (nom) | 38.7 V - breakdown voltage at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 93.8 V - clamping voltage at 50 A peak pulse current, limiting downstream voltage stress |
| PPPM (10/1000 μs) | 5000 W - peak pulse power handling capability for lightning/surge immunity compliance |
| TJ max | +185 °C - enables use in high-temperature automotive engine compartments without derating |
| IR @ VWM | 2.0 μA - ultra-low leakage ensures minimal standby power loss in battery-powered systems |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side reference point |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±5 % over lifetime and 1000-hour HTOL testing at 150 °C |
| MSL Level 1 rating | Allows reflow soldering at 260 °C peak without moisture-induced package cracking |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed automotive ECUs and industrial enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp transients above 33 V while maintaining low leakage. Use Value: Clamps to ≤93.8 V at 50 A, preventing damage to 3.3 V/5 V logic supplies downstream of DC/DC converters. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: TVS connected across signal and return path to shunt fast transients before reaching precision DAC or op-amp inputs. Use Value: 2.0 μA leakage at 33 V avoids loading sensitive current-loop receivers; 185 °C rating supports operation near motor drives. |
| Automotive CAN Bus Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding CAN_H/CAN_L differential pair from ESD (IEC 61000-4-2) and coupled surges in body control modules. IC Role / Device Role / Timing Role: One 5KASMC33AHM3_A/I per line (CAN_H–GND, CAN_L–GND) providing unidirectional clamping referenced to chassis ground. Use Value: 93.8 V clamping ensures CAN transceiver I/O remains within absolute maximum ratings during 8 kV contact discharge. | Use Scenario: Front-end surge suppression on AC/DC adapter input (after bridge rectifier, before bulk capacitor) in smart home devices. IC Role / Device Role / Timing Role: TVS placed across DC bus to absorb energy from lightning-induced surges on mains-connected equipment. Use Value: 5000 W peak pulse power handles 10/1000 μs waveform per IEC 61000-4-5 Level 3 (2 kV line-earth), extending adapter MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 (Vishay) | Same VWM/VBR/VC specs but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy < 100 mJ |
| 1.5KE33A (ON Semiconductor) | Through-hole DO-201 package; same 33 V VWM but higher VC = 53.3 V at 92.5 A | Higher clamping voltage increases risk to downstream ICs; not AEC-Q101 qualified | Choose only for non-automotive cost-sensitive designs where leaded assembly is acceptable |
Compared with SMBJ33A-E3/52 and 1.5KE33A, the 5KASMC33AHM3_A/I delivers superior surge robustness (5000 W vs. 600 W/1500 W), automotive qualification, and SMC's thermal advantage (RθJM = 20.8 °C/W), making it optimal for high-reliability embedded power rail protection.
Availability
5KASMC33AHM3_A/I is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, and CAN bus protection requiring stable component supply and long-term lifecycle assurance.
Supply support for 5KASMC33AHM3_A/I 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, MOSFETs, and TVS devices with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 5KASMCxxA series is designed specifically for high-energy transient suppression in harsh-environment automotive and industrial systems, leveraging passivated anisotropic rectifier technology to ensure stable clamping performance across extended temperature ranges.
FAQ
What is the maximum clamping voltage of the 5KASMC33AHM3_A/I at its rated peak pulse current?
The 5KASMC33AHM3_A/I has a maximum clamping voltage (VC) of 93.8 V at 50 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 89432 and defines the upper voltage limit imposed on protected circuits during surge events. The 5KASMC33AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the 5KASMC33AHM3_A/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the 5KASMC33AHM3_A/I is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 19-Jan-2024 (Document Number: 89432). It meets stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (UHAST), supporting deployment in engine control units, body electronics, and ADAS modules where reliability is critical.
What is the thermal resistance from junction to mount (RθJM) for the 5KASMC33AHM3_A/I in its SMC package?
The 5KASMC33AHM3_A/I has a typical thermal resistance from junction to mount (RθJM) of 20.8 °C/W, as specified in the Thermal Characteristics table of the Vishay datasheet. This value assumes mounting on an infinite heatsink and enables effective heat dissipation during repetitive surge events, contributing to its 185 °C maximum junction temperature rating.
Does the 5KASMC33AHM3_A/I have a bidirectional or unidirectional polarity configuration?
The 5KASMC33AHM3_A/I is unidirectional only, as stated in the Features section of the Vishay datasheet. It conducts in the forward direction like a standard diode and clamps transients in reverse bias. Polarity is marked by a cathode band on the SMC package body, and the device must be oriented accordingly in-circuit to protect against negative-going transients relative to ground.
What is the leakage current specification for the 5KASMC33AHM3_A/I at its 33 V stand-off voltage?
The 5KASMC33AHM3_A/I specifies a maximum reverse leakage current (IR) of 2.0 μA at its 33 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage minimizes power loss in always-on automotive subsystems and preserves battery life in portable industrial sensors, as confirmed in the Electrical Characteristics table of the Vishay datasheet.
5KASMC33AHM3_A/I 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 93.8A
- 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)
5KASMC33AHM3_A/I FAQ
1.How can I place an order for 5KASMC33AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC33AHM3_A/I 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 5KASMC33AHM3_A/I reliable?
The price and inventory of 5KASMC33AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC33AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 5KASMC33AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC33AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC33AHM3_A/I?
5KASMC33AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC33AHM3_A/I 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 5KASMC33AHM3_A/I?
For technical support, including 5KASMC33AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC33AHM3_A/I requirements.
6.How does Aetrix verify that 5KASMC33AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 5KASMC33AHM3_A/I 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 5KASMC33AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 5KASMC33AHM3_A/I?
All 5KASMC33AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC33AHM3_A/I, 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 5KASMC33AHM3_A/I part is unused and in its original packaging.
Return procedure for 5KASMC33AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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