My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6S33AHM3/I
- Part No.:
- SM6S33AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM6S33AHM3/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,262
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6S33AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 33 V stand-off voltage (VWM), 38.7 V nominal breakdown (VBR), 4600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM6S33AHM3/I datasheet, SM6S33AHM3/I pinout, SM6S33AHM3/I application, or SM6S33AHM3/I equivalent, key selection criteria include its 175 °C junction rating, low 10 μA leakage at VWM, 53.3 V clamping voltage at IPPM, and compliance with ISO7637-2 surge testing under automotive conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping performance across -55 °C to +175 °C operating range. Its DO-218AB package features a metal heatsink anode configuration and achieves 0.45 °C/W junction-to-mount thermal resistance, enabling high-reliability transient suppression without external heatsinking in constrained automotive PCB layouts.
The device operates exclusively in unidirectional mode with 0.091 %/°C temperature coefficient of VBR and meets MSL Level 1 per J-STD-020 at 245 °C peak reflow. It sustains 600 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits ≤1.9 V forward voltage at 100 A DC pulse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR (nom) | 38.7 V - Breakdown voltage at 5 mA test current; defines precise turn-on threshold |
| VC @ IPPM | 53.3 V - Clamping voltage at 86 A peak pulse current; limits downstream voltage stress |
| PPPM (10/1000 μs) | 4600 W - Peak transient energy handling capability for short-duration surges |
| TJ max | +175 °C - Enables operation in under-hood automotive environments without derating |
| ID @ VWM | 10 μA - Ultra-low leakage preserves battery drain budget in always-on vehicle systems |
| Package | DO-218AB - Metal heatsink anode package with UL 94 V-0 molding compound |
Pinout & Package
DO-218AB package features two terminals: Lead 1 (cathode) and Lead 2/metal heatsink (anode). The anode serves as both electrical terminal and thermal path to PCB copper, requiring direct connection to large copper pour for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Lead 1) | Transient current sink | Connected to protected line; conducts surge current to anode during overvoltage events |
| Anode / Metal Heatsink (Lead 2) | Reference node & thermal interface | Must be soldered to large PCB copper area to dissipate 4600 W pulses and maintain TJ ≤ 175 °C |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, ADAS, and infotainment modules |
| Junction passivation | Stable VBR drift < ±5 % over lifetime under 175 °C thermal cycling and humidity exposure |
| ISO7637-2 compliance | Withstands load dump pulses up to 35 V for 400 ms and 12 V for 1000 ms without degradation |
| MSL Level 1 rating | Zero moisture sensitivity; safe for standard SMT reflow without baking or dry pack requirements |
| RoHS-compliant & halogen-free | Meets automotive ELV Directive and JESD201 Class 2 whisker resistance for long-term solder joint integrity |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 12 V supply rail from alternator load dump transients during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes above 33 V to 53.3 V within nanoseconds. Use Value: Prevents damage to MCU, CAN transceivers, and power regulators by limiting transient energy to 4600 W. | Use Scenario: Shields LIN bus power and microcontroller I/O from switching noise in door module actuators. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at BCM input filter stage. Use Value: Maintains system uptime by suppressing >100 V spikes induced by solenoid coil de-energization. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and ISP power rails against ESD and inductive kickback in front-facing cameras. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V or 3.3 V camera module input. Use Value: Ensures uninterrupted video stream by clamping sub-100 ns transients to <53.3 V while drawing <10 μA leakage. | Use Scenario: Protects H-bridge gate drivers and current sense amplifiers from motor back-EMF during regenerative braking. IC Role / Device Role / Timing Role: High-energy TVS on 12 V logic supply feeding EPS controller ICs. Use Value: Handles 600 A surge currents without failure, preserving steering assist functionality during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Lower PPPM (400 W), SMA package, 55 V clamping voltage, no AEC-Q101 qualification | Not suitable for automotive load dump; limited to industrial or consumer-grade surge protection | Select only for cost-sensitive non-automotive designs where 4600 W capability is unnecessary |
| SM6S33AHM3/52 | Same electrical specs and DO-218AB package; differs only in tape-and-reel packaging (5000 pcs vs. 750 pcs per reel) | No functional difference; identical performance and mounting requirements | Choose based on production volume and assembly line feeder compatibility |
Compared with SMAJ33A and SM6S33AHM3/52, the SM6S33AHM3/I delivers 11.5× higher surge power handling and automotive-grade qualification-critical for ECU and BCM deployments-while the /52 variant offers identical protection in high-volume tape format.
Availability
SM6S33AHM3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SM6S33AHM3/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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SM6SxxA family is engineered specifically for automotive load dump and ISO7637-2 transient protection, emphasizing high-temperature stability, low leakage, and robust surge immunity in harsh under-hood environments.
FAQ
What is the maximum clamping voltage of the SM6S33AHM3/I at its rated peak pulse current?
The SM6S33AHM3/I has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 86 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components experience no more than 53.3 V during transient events. The SM6S33AHM3/I maintains this clamping performance across its full operating temperature range from -55 °C to +175 °C.
Is the SM6S33AHM3/I suitable for new automotive designs despite the "Not For New Designs" note in Vishay's document?
Yes-the "Not For New Designs" notice applies only to the legacy SM6S10A–SM6S36A base part numbers without the HM3 suffix. The SM6S33AHM3/I is explicitly listed as the qualified alternative in Vishay's documentation and carries AEC-Q101 qualification, DO-218AB packaging, and full ISO7637-2 compliance. Engineers may confidently use SM6S33AHM3/I in new automotive designs requiring high-energy transient suppression.
How does the DO-218AB package of the SM6S33AHM3/I improve thermal performance compared to SMA or SMB packages?
The DO-218AB package of the SM6S33AHM3/I integrates a metal heatsink anode that provides a direct thermal path to the PCB, achieving a junction-to-mount thermal resistance (RθJM) of just 0.45 °C/W. In contrast, SMA/SMB packages rely solely on lead-frame conduction and exhibit RθJA values >60 °C/W. This enables the SM6S33AHM3/I to safely dissipate 4600 W pulses without exceeding 175 °C junction temperature when mounted on ≥2 oz. copper.
Does the SM6S33AHM3/I meet RoHS and halogen-free requirements?
Yes-the SM6S33AHM3/I carries the E3 suffix, confirming it is RoHS-compliant, halogen-free, and features matte tin-plated leads compliant with J-STD-002 and JESD22-B102. It also passes JESD201 Class 2 whisker testing, ensuring long-term solder joint reliability in automotive applications subject to thermal cycling and vibration.
What is the leakage current specification of the SM6S33AHM3/I at its stand-off voltage and elevated temperature?
The SM6S33AHM3/I specifies a maximum reverse leakage current (ID) of 10 μA at 33 V (VWM) and 25 °C, and ≤15 μA at the same voltage but at TJ = 175 °C. This ultra-low leakage preserves battery standby current budgets in always-on automotive systems such as telematics and alarm controllers, where cumulative leakage across multiple protection devices must remain below 100 μA.
SM6S33AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- 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):
- 86A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AC
SM6S33AHM3/I FAQ
1.How can I place an order for SM6S33AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S33AHM3/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 SM6S33AHM3/I reliable?
The price and inventory of SM6S33AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S33AHM3/I is usually 5 days.
3.What payment methods are accepted for SM6S33AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S33AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S33AHM3/I?
SM6S33AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S33AHM3/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 SM6S33AHM3/I?
For technical support, including SM6S33AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S33AHM3/I requirements.
6.How does Aetrix verify that SM6S33AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6S33AHM3/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 SM6S33AHM3/I meets industry standards.
7.What is the process for return or replacement of SM6S33AHM3/I?
All SM6S33AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S33AHM3/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 SM6S33AHM3/I part is unused and in its original packaging.
Return procedure for SM6S33AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S33AHM3/I 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 …
