My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ20CAHE3/57T
- Part No.:
- SMCJ20CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ20CAHE3/57T.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,727
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ20CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features 20 V standoff voltage (VWM), 32.4 V maximum clamping voltage at 46.3 A peak pulse current (10/1000 µs), and 1500 W peak pulse power dissipation. Used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supply rails.
For engineers reviewing the SMCJ20CAHE3/57T datasheet, SMCJ20CAHE3/57T pinout, SMCJ20CAHE3/57T application, or SMCJ20CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VWM = 1.62), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ20CAHE3/57T operates as a silicon avalanche diode with symmetrical breakdown in both directions, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1 µA at 20 V) and repeatable clamping performance across temperature (-55 °C to +150 °C).
It delivers fast response (<1.0 ps) to transient events such as ESD, inductive switching spikes, and lightning-induced surges. Thermal resistance is characterized at RθJA = 75 °C/W (on recommended pad layout) and RθJL = 15 °C/W, supporting reliable operation under repetitive surge conditions when mounted per JESD22-B102 soldering standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuit. |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - Verified breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 32.4 V at 46.3 A (10/1000 µs) - Clamping voltage limits stress on downstream components during worst-case surge. |
| PPPM | 1500 W - Peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 surge immunity design. |
| ID @ VWM | <1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor interfaces. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking; case conforms to JEDEC DO-214AB outline, 7.11 mm × 6.22 mm × 2.62 mm, matte tin-plated leads, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to ground or return rail during clamping; symmetric with Anode for AC applications. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or floating lines (e.g., USB D+/D−, RS-485, CAN bus) without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, ADAS sensors, and body control modules requiring long-term field reliability. |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements up to 4 kV (line-to-earth) in properly designed PCB layouts. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required prior to assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between power rail and chassis ground to shunt surge energy away from LDOs and microcontrollers. Use Value: Withstands 1500 W surges and maintains <1 µA leakage at 20 V, ensuring minimal quiescent current impact and robust startup behavior after cold cranking. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across sensor output and ground to suppress EFT bursts without distorting mV-level signals. Use Value: Clamps to 32.4 V within picoseconds while adding negligible loading (<1 pF typical), preserving signal fidelity and ADC accuracy. |
| Telecom Interface Surge Protection | Consumer Device USB Port Protection |
|
Use Scenario: Hardening RS-485 transceivers in outdoor telecom base stations against lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional SMCJ20CAHE3/57T installed on differential pair (A/B) to clamp common-mode transients before they reach transceiver inputs. Use Value: Symmetrical 22.2–24.5 V breakdown ensures balanced clamping on both lines, preventing data corruption during 4 kV surge events. |
Use Scenario: Safeguarding USB 2.0 data lines in portable medical monitors exposed to ESD in clinical environments. IC Role / Device Role / Timing Role: Dual-channel placement (one per D+ and D−) to absorb ±8 kV contact ESD per IEC 61000-4-2 without signal degradation. Use Value: Sub-1 µA leakage and fast response prevent false disconnect detection and maintain USB enumeration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC20CA | Same VWM (20 V) and VC (32.4 V), but lower PPPM (600 W); smaller SMA package (DO-214AC). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance. | Select when board space is constrained and surge threat level is ≤1 kV. |
| SMCJ20CAHM3/57T | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free material composition (HM3 vs HE3). | No functional difference; HM3 meets stricter environmental mandates (e.g., EU RoHS + halogen-free). | Choose HM3 version if halogen-free compliance is contractually required. |
Compared with SAC20CA, SMCJ20CAHE3/57T provides 2.5× higher surge power handling and larger thermal mass for sustained clamping; versus SMCJ20CAHM3/57T, it offers identical protection performance with standard RoHS compliance-making it optimal for cost-sensitive automotive Tier 2 suppliers not requiring halogen-free certification.
Availability
SMCJ20CAHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom RS-485 surge immunity, and consumer USB port ESD suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ20CAHE3/57T 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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMCJ20CAHE3/57T at its rated peak pulse current?
The SMCJ20CAHE3/57T clamps to a maximum of 32.4 V when subjected to its rated peak pulse current of 46.3 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and verified across production lots; it directly determines the maximum voltage stress imposed on protected downstream components during surge events.
Is SMCJ20CAHE3/57T suitable for automotive applications?
Yes, SMCJ20CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and validation across temperature cycling, high-temperature reverse bias, and ESD tests-making it appropriate for engine control units, ADAS camera modules, and body electronics where reliability under vibration and thermal stress is critical.
How does the bidirectional nature of SMCJ20CAHE3/57T affect its placement on a PCB?
The SMCJ20CAHE3/57T has no polarity marking and functions identically in both directions, so it can be placed across any two nodes requiring symmetrical overvoltage protection-such as differential signal pairs (CAN_H/CAN_L, RS-485 A/B) or AC-coupled power rails. No orientation check is needed during automated placement, simplifying assembly and reducing misorientation defects.
What is the maximum operating temperature for SMCJ20CAHE3/57T?
The SMCJ20CAHE3/57T has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. This allows deployment in under-hood automotive locations, industrial motor drives, and outdoor telecom equipment without derating below full 1500 W surge capability at ambient temperatures up to +85 °C (with proper PCB copper area per datasheet fig. 2).
Does SMCJ20CAHE3/57T meet RoHS and REACH requirements?
Yes, SMCJ20CAHE3/57T carries the HE3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and conformity with REACH SVHC thresholds. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above regulated limits, and its matte tin-plated leads comply with J-STD-002 solderability standards.
SMCJ20CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ20CAHE3/57T FAQ
1.How can I place an order for SMCJ20CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ20CAHE3/57T 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 SMCJ20CAHE3/57T reliable?
The price and inventory of SMCJ20CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ20CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ20CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ20CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ20CAHE3/57T?
SMCJ20CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ20CAHE3/57T 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 SMCJ20CAHE3/57T?
For technical support, including SMCJ20CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ20CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ20CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ20CAHE3/57T 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 SMCJ20CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ20CAHE3/57T?
All SMCJ20CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ20CAHE3/57T, 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 SMCJ20CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ20CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ20CAHE3/57T 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 …
