My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T33CAHE3/5B
;;2.jpg)
- Part No.:
- SM6T33CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHE3/5B.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,435
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T33CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 33 V standoff voltage (VWM), 37.1–41.0 V breakdown (VBR at 1 mA), 600 W peak pulse power (10/1000 μs), and clamps to ≤59 V at 13.1 A. It is AEC-Q101 qualified and used for protecting automotive sensor signal lines against inductive switching surges.
For engineers reviewing the SM6T33CAHE3/5B datasheet, SM6T33CAHE3/5B pinout, SM6T33CAHE3/5B application, or SM6T33CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, SMB package thermal performance, and verified 600 W surge handling per JEDEC standards.
Technical Context
The SM6T33CAHE3/5B operates as a symmetrical silicon avalanche diode with identical forward and reverse breakdown characteristics due to its bidirectional CA construction. Its glass-passivated junction ensures stable leakage (<1.0 μA at 28.2 V) and low dynamic impedance under transient stress.
Designed for surface-mount placement on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it delivers 600 W peak pulse power with <100 °C/W junction-to-ambient thermal resistance and supports operating junction temperatures from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | ≤59 V at 13.1 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability per standard 10/1000 μs waveform |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby current; critical for low-power sensor interfaces |
| TJ max. | +150 °C - Enables use in under-hood automotive environments without derating |
| Package | SMB (DO-214AA) - Industry-standard footprint with 2.20 mm height; compatible with automated reflow |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (reverse bias) | Accepts surge current during negative-going transients; symmetric with cathode |
| Cathode | Transient current entry point (forward bias) | Accepts surge current during positive-going transients; symmetric with anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and surge endurance |
| 600 W peak pulse power | Meets ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surge immunity requirements |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or ADC front-ends |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-related popcorn failure |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage across 15-year automotive service life |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump and inductive kickback in 12 V systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching precision amplifier or MCU ADC input. Use Value: Limits voltage excursion to ≤59 V during 13.1 A surge, preserving sensor signal integrity and preventing ADC saturation or latch-up. |
Use Scenario: Guarding differential CAN_H/CAN_L lines in factory automation gateways subject to EFT and surge coupling from motor drives. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) providing common-mode and differential-mode transient suppression without affecting 1 Mbps CAN signaling. Use Value: Maintains bus eye diagram integrity by clamping transients within 1 ns response time while adding <0.5 pF parasitic capacitance per line. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in smart home hubs against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp mounted adjacent to USB connector to divert ESD current away from PHY transceiver. Use Value: Achieves <1.0 μA leakage at 28.2 V, ensuring no impact on USB suspend current budget while passing IEC 61000-4-2 Level 4 testing. |
Use Scenario: Front-end protection of ADSL/VDSL line interface circuits exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge arrestor placed before transformer coupling, rated for repeated 600 W pulses per ITU-T K.20/K.21. Use Value: Withstands ≥1000 surges at 8/20 μs waveform (VC = 68 V at 11.1 A), extending line card field life in telecom central offices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select only when board space is constrained and surge energy does not exceed 400 W rating |
| 1.5KE33CA | Higher PPPM (1500 W) but axial DO-15 package; slower response due to higher inductance | Not suitable for high-speed data lines; requires through-hole mounting and larger PCB area | Prefer for legacy industrial power supply inputs where layout flexibility allows axial components |
Compared with SMAJ33CA and 1.5KE33CA, the SM6T33CAHE3/5B uniquely balances AEC-Q101 qualification, 600 W surge capacity, SMB footprint, and sub-1 μA leakage-making it optimal for space-constrained, high-reliability automotive and industrial signal-line protection.
Availability
SM6T33CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN gateways, consumer USB hubs, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T33CAHE3/5B 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SM6T Series was engineered specifically for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and repeatable 600 W surge performance are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T33CAHE3/5B?
The "CA" suffix in SM6T33CAHE3/5B denotes a bidirectional configuration, meaning the device provides symmetrical clamping in both polarities-essential for protecting AC-coupled or differential signal lines like CAN, RS-485, or USB. Unlike unidirectional variants (e.g., SM6T33A), SM6T33CAHE3/5B has no cathode marking and identical VBR in forward and reverse directions, as confirmed in Vishay's Electrical Characteristics table.
Is SM6T33CAHE3/5B suitable for automotive applications?
Yes, SM6T33CAHE3/5B is explicitly AEC-Q101 qualified (per ordering code HE3 suffix), validated for temperature cycling, mechanical shock, and surge endurance required in automotive ECUs and sensor modules. Its 150 °C max junction temperature, MSL Level 1 rating, and 600 W pulse power make it appropriate for under-hood and body-control unit deployments where SM6T33CAHE3/5B replaces legacy TVS diodes lacking automotive qualification.
What is the clamping voltage of SM6T33CAHE3/5B at rated surge current?
The clamping voltage (VC) of SM6T33CAHE3/5B is guaranteed ≤59 V at 13.1 A peak pulse current using the standard 10/1000 μs waveform, as specified in Vishay's Electrical Characteristics table. This value reflects actual measured voltage across the device terminals during surge conditions and determines the maximum overvoltage imposed on protected circuitry-critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMB package of SM6T33CAHE3/5B compare thermally to SMA or SMC packages?
The SMB (DO-214AA) package of SM6T33CAHE3/5B offers a thermal resistance of 100 °C/W junction-to-ambient (RθJA) when mounted on 5.0 mm × 5.0 mm copper pads-higher than SMC (≈50 °C/W) but lower than SMA (≈125 °C/W). This makes SM6T33CAHE3/5B suitable for moderate-duty surge suppression where board space is limited but thermal dissipation must exceed SMA capability, as confirmed in Vishay's Thermal Characteristics section.
Does SM6T33CAHE3/5B meet RoHS and halogen-free requirements?
Yes, SM6T33CAHE3/5B carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. Per Vishay's Ordering Information and Mechanical Data sections, HE3 devices use matte tin-plated leads and molding compound meeting UL 94 V-0, with no restriction on halogen content-distinct from HM3 variants which are explicitly halogen-free. Compliance documentation is available under Vishay document #99912.
SM6T33CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T33CAHE3/5B FAQ
1.How can I place an order for SM6T33CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHE3/5B 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 SM6T33CAHE3/5B reliable?
The price and inventory of SM6T33CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T33CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHE3/5B?
SM6T33CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHE3/5B 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 SM6T33CAHE3/5B?
For technical support, including SM6T33CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHE3/5B requirements.
6.How does Aetrix verify that SM6T33CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHE3/5B 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 SM6T33CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T33CAHE3/5B?
All SM6T33CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHE3/5B, 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 SM6T33CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T33CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33CAHE3/5B 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 …
