My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC33CAHE3/57T
- Part No.:
- 1.5SMC33CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33CAHE3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,316
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC33CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 µs), with a standoff voltage of 28.2 V, clamping voltage of 45.7 V at 32.8 A, and AEC-Q101 qualification for automotive use. It protects signal lines and power rails in sensor interfaces and ECU inputs against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC33CAHE3/57T datasheet, 1.5SMC33CAHE3/57T pinout, 1.5SMC33CAHE3/57T application, or 1.5SMC33CAHE3/57T equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, AEC-Q101 compliance status, and direct alternative part comparisons - all specific to the 1.5SMC33CAHE3/57T variant.
Technical Context
The 1.5SMC33CAHE3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±31.4 V (min) and ±34.7 V (max) breakdown in both polarities. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting high-speed sensor interfaces and CAN bus nodes.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 1500 W peak pulse power per IEC 61000-4-5 with 0.01% duty cycle, and supports continuous power dissipation of 6.5 W at 50 °C ambient. Junction temperature range spans −65 °C to +150 °C, with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges up to IEC 61000-4-5 Level 4 without failure |
| Stand-off Voltage (VWM) | 28.2 V - maximum continuous reverse voltage before leakage exceeds 1 µA; sets operating margin below clamping threshold |
| Breakdown Voltage (VBR) | 31.4 V (min) to 34.7 V (max) at 1 mA - defines symmetric avalanche onset in both directions for bidirectional protection |
| Clamping Voltage (VC) | 45.7 V at 32.8 A - limits transient voltage seen by downstream ICs during full-rated surge event |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive environments and industrial control enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Identical terminal in both directions; connects to protected line (e.g., CAN_H or LIN bus) |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal; connects to reference plane (e.g., chassis ground or signal return) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment up to Level 4 (4 kV) |
| Glass-passivated junction | Ensures stable breakdown voltage over lifetime and improved reliability vs. epoxy-passivated alternatives |
| AEC-Q101 qualification | Validated for automotive powertrain, body control, and ADAS modules requiring extended temperature and reliability validation |
| MSL Level 1 | Allows unlimited floor life and standard reflow without baking; compatible with high-volume SMT assembly |
Applications
| Automotive Sensor Interface Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure, temperature, and position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp ±50 V transients within 1 ns. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC front-ends while maintaining signal integrity below 28.2 V normal operation. |
Use Scenario: Safeguarding CAN_H and CAN_L lines in vehicle networking nodes against ESD and coupled surges from nearby solenoid switching. IC Role / Device Role / Timing Role: Two 1.5SMC33CAHE3/57T devices deployed differentially across CAN bus pair to suppress common-mode transients up to ±45.7 V. Use Value: Maintains CAN FD bit timing integrity by limiting voltage excursion below transceiver absolute maximum ratings (±40 V typical). |
| Industrial PLC Analog Input Protection | Telecom Line Card Surge Guarding |
|
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges induced by motor drives or lightning. IC Role / Device Role / Timing Role: Bidirectional TVS connected across input terminals to shunt >30 V transients directly to system ground before reaching op-amp input stage. Use Value: Enables robust operation in factory-floor environments where 1500 W surge capability meets IEC 61000-4-4 (EFT) and -4-5 requirements. |
Use Scenario: Protecting Ethernet PHY or VDSL line drivers on telecom access equipment from induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Placed at line-side interface between transformer center-tap and ground to clamp longitudinal mode surges on twisted-pair cables. Use Value: Limits clamped voltage to 45.7 V, staying within safe operating area of 50 V-rated isolation transformers and PHY ESD structures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same 33 V bidirectional rating but lower 400 W peak power; SMA package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge | Select when board space is constrained and surge threat level is ≤1 kV; verify thermal performance with 15 °C/W RθJA |
| 1.5KE33CA | Through-hole TO-204AA (DO-41); identical 1500 W rating and 33 V breakdown, but no AEC-Q101 qualification | Not approved for automotive production; used in industrial prototypes or non-safety-critical consumer gear | Choose for cost-sensitive, non-automotive designs where manual assembly or wave soldering is preferred |
Compared with SMAJ33CA and 1.5KE33CA, the 1.5SMC33CAHE3/57T uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W IEC 61000-4-5 compliance - making it the only option qualified for production automotive ECUs requiring zero layout change from legacy SMC footprints.
Availability
1.5SMC33CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus hardening, industrial PLC analog inputs, and telecom line card surge guarding requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for 1.5SMC33CAHE3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against repetitive surges and extended temperature operation are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC33CAHE3/57T at its rated peak pulse current?
The 1.5SMC33CAHE3/57T clamps to a maximum of 45.7 V at its rated peak pulse current of 32.8 A (10/1000 µs waveform). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads and represents the upper limit of voltage imposed on protected circuitry during a full-rated surge event. The 1.5SMC33CAHE3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC33CAHE3/57T suitable for automotive applications?
Yes, the 1.5SMC33CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), confirming suitability for engine control units, body electronics, and ADAS modules. The 1.5SMC33CAHE3/57T is RoHS-compliant and halogen-free per Vishay's material categorization.
How does the bidirectional configuration of the 1.5SMC33CAHE3/57T affect its circuit placement?
The 1.5SMC33CAHE3/57T has no polarity marking and functions identically in both directions, allowing placement across any two points needing symmetrical overvoltage protection - such as differential signal pairs (CAN_H/CAN_L), AC-coupled lines, or ungrounded power rails. Unlike unidirectional TVS diodes, the 1.5SMC33CAHE3/57T eliminates orientation errors during automated assembly and simplifies schematic symbol usage.
What is the thermal resistance of the 1.5SMC33CAHE3/57T, and how does it impact PCB layout?
The 1.5SMC33CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper pads). For reliable operation at full 6.5 W continuous power, PCB layout must provide adequate copper area and thermal vias; doubling pad size reduces RθJA by ~20%. The 1.5SMC33CAHE3/57T's junction-to-lead resistance (RθJL) is 15 °C/W, supporting localized heat sinking to internal ground planes.
Does the 1.5SMC33CAHE3/57T meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, the 1.5SMC33CAHE3/57T meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it can be stored indefinitely at ambient conditions without baking and processed through standard lead-free reflow profiles (e.g., JEDEC J-STD-020D) without risk of popcorning or delamination. The 1.5SMC33CAHE3/57T's matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
1.5SMC33CAHE3/57T 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:
- 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):
- 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)
1.5SMC33CAHE3/57T FAQ
1.How can I place an order for 1.5SMC33CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33CAHE3/57T 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 1.5SMC33CAHE3/57T reliable?
The price and inventory of 1.5SMC33CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC33CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33CAHE3/57T?
1.5SMC33CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33CAHE3/57T 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 1.5SMC33CAHE3/57T?
For technical support, including 1.5SMC33CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC33CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33CAHE3/57T 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 1.5SMC33CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC33CAHE3/57T?
All 1.5SMC33CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33CAHE3/57T, 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 1.5SMC33CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC33CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33CAHE3/57T 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 …
