My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC33CAHE3_A/H
- Part No.:
- 1.5SMC33CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33CAHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,776
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC33CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 33 V standoff voltage (VWM), and 45.7 V clamping voltage (VC) at 32.8 A peak pulse current. It protects signal lines and power rails in automotive sensor units, industrial I/O interfaces, and telecom front-end circuits.
For engineers reviewing the 1.5SMC33CAHE3_A/H datasheet, 1.5SMC33CAHE3_A/H pinout, 1.5SMC33CAHE3_A/H application, or 1.5SMC33CAHE3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 33 V reverse standoff rating, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage exceeding its breakdown threshold (~37.1–41.0 V), it avalanches to divert surge current away from downstream circuitry while maintaining clamping voltage ≤45.7 V. Its bidirectional symmetry enables use on AC-coupled or differential signal paths without polarity concerns.
Engineered for automotive-grade reliability, the 1.5SMC33CAHE3_A/H features glass-passivated junction, MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and thermal resistance of 75 °C/W (junction-to-ambient) when mounted on 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC bias limit for protected line. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Voltage range where avalanche conduction begins; ensures reliable triggering above normal operating transients. |
| VC (Clamping) | 45.7 V at 32.8 A (10/1000 μs) - Maximum voltage seen by protected circuit during worst-case surge; determines downstream component voltage stress. |
| PPPM | 1500 W - Peak pulse power handling capability; supports robust protection against lightning-induced surges and inductive switching spikes. |
| ID (Leakage) | ≤1.0 μA at 33 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive overvoltage events; connects to line being protected. |
| Anode | Transient current exit (negative half-cycle) | Serves as return path during negative overvoltage events; enables symmetrical clamping on AC or differential signals. |
| Cathode | Transient current exit (positive half-cycle) | Provides low-impedance path to ground or reference rail during positive surges; critical for fast clamping response. |
| Cathode | Transient current entry (negative half-cycle) | Accepts surge current during negative transients; completes bidirectional conduction path without external polarity reversal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled, differential, or floating signal lines without polarity constraints. |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge waveforms. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without popcorn cracking or delamination; eliminates pre-bake requirement. |
| Glass-passivated junction | Improves long-term stability and reduces parameter drift under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS diode placed across signal pair or supply rail to clamp transients before they reach sensitive IC inputs. Use Value: Maintains signal fidelity under ISO 16750-2 load dump (12 V system: +120 V/100 ms) and prevents latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding RS-485/RS-422 transceivers and PLC analog input channels against field-induced surges in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamping element connected between differential lines and ground to suppress common-mode and differential-mode transients. Use Value: Limits voltage excursion to ≤45.7 V during 1 kV/500 A IEC 61000-4-5 combination wave tests, preserving data integrity and preventing transceiver damage. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Front-end surge suppression on Ethernet PHY magnetics or DSL line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed before isolation transformers to absorb energy and reduce stress on secondary-side protection. Use Value: Clamps 10/1000 μs surges up to 1500 W without degradation, extending transformer and PHY IC lifetime in outdoor or unshielded installations. |
Use Scenario: Secondary-side overvoltage protection on 5 V/9 V/12 V DC output rails of wall adapters used in smart home devices. IC Role / Device Role / Timing Role: Bidirectional shunt limiter across regulated output to prevent overvoltage damage to USB ports or microcontrollers during regulator fault conditions. Use Value: Responds in <1 ps to clamp output excursions beyond 33 V, limiting downstream voltage stress to ≤45.7 V during short-circuit or feedback failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same VWM (33 V) and VC (53.3 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA). | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 level 4 or automotive load dump. | Select when board space is constrained and surge threat level is limited to ±8 kV contact ESD per IEC 61000-4-2. |
| 1.5KE33CA | Same VWM/VC specs but through-hole DO-201 package; higher thermal mass but incompatible with SMT assembly. | Requires manual or wave-soldering; not suitable for high-volume automated production or compact PCB layouts. | Choose only for legacy designs, prototyping, or repair scenarios where SMT infrastructure is unavailable. |
Compared with SMBJ33CA and 1.5KE33CA, the 1.5SMC33CAHE3_A/H delivers superior surge robustness (1500 W vs. 600 W or 1500 W with THT limitations) and automotive qualification-making it the preferred choice for production-grade automotive and industrial SMT designs requiring AEC-Q101 compliance and high-reliability clamping.
Availability
1.5SMC33CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O protection, and telecom line interface designs requiring stable component supply, AEC-Q101 validation, and consistent SMC-package form factor.
Supply support for 1.5SMC33CAHE3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and communications systems where space, robustness, and qualification compliance are critical.
FAQ
What does the "CA" suffix indicate in 1.5SMC33CAHE3_A/H?
The "CA" suffix in 1.5SMC33CAHE3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities-ideal for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating power rails without polarity concerns. This distinguishes it from unidirectional variants (e.g., "A") that require correct anode/cathode orientation.
Is 1.5SMC33CAHE3_A/H qualified for automotive applications?
Yes, 1.5SMC33CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling-validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of 1.5SMC33CAHE3_A/H and why does it matter?
The clamping voltage (VC) of 1.5SMC33CAHE3_A/H is 45.7 V at 32.8 A (10/1000 μs waveform). This value represents the maximum voltage imposed on the protected circuit during a surge event; staying below this threshold ensures downstream components-such as 3.3 V or 5 V logic ICs-are not subjected to destructive overvoltage, directly determining system-level surge survivability.
How does the SMC (DO-214AB) package of 1.5SMC33CAHE3_A/H compare to SMB or SOD-123 packages?
The SMC (DO-214AB) package of 1.5SMC33CAHE3_A/H offers higher power handling (1500 W) and lower thermal resistance (RθJA = 75 °C/W on 8 mm² pads) than SMB (600 W) or SOD-123 (<100 W) packages. Its larger footprint accommodates greater surge energy dissipation, making it appropriate for demanding industrial and automotive applications where smaller packages would thermally saturate.
Can 1.5SMC33CAHE3_A/H be used in place of a unidirectional TVS like 1.5SMC33AHE3_A/H?
No-1.5SMC33CAHE3_A/H is bidirectional and lacks polarity marking, while 1.5SMC33AHE3_A/H is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC/differential lines, whereas unidirectional parts are required for DC rails where reverse conduction must be blocked. Interchange introduces risk of unintended conduction or failed protection.
1.5SMC33CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 32.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
1.5SMC33CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC33CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33CAHE3_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 1.5SMC33CAHE3_A/H reliable?
The price and inventory of 1.5SMC33CAHE3_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 1.5SMC33CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC33CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33CAHE3_A/H?
1.5SMC33CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33CAHE3_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 1.5SMC33CAHE3_A/H?
For technical support, including 1.5SMC33CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC33CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33CAHE3_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 1.5SMC33CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC33CAHE3_A/H?
All 1.5SMC33CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33CAHE3_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 1.5SMC33CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC33CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33CAHE3_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…
