My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ20CAHE3_A/H
- Part No.:
- SMCJ20CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ20CAHE3_A/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,444
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ20CAHE3_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 20 V standoff voltage (VWM), 32.4 V clamping voltage (VC) at 46.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power electronics.
For engineers reviewing the SMCJ20CAHE3_A/H datasheet, SMCJ20CAHE3_A/H pinout, SMCJ20CAHE3_A/H application, or SMCJ20CAHE3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VWM = 1.62), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at 20 V), but conducts heavily when transient voltage exceeds its breakdown range (22.2–24.5 V at 1 mA test current), limiting downstream voltage to ≤32.4 V. Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
Designed for bidirectional operation, SMCJ20CAHE3_A/H suppresses positive and negative transients symmetrically without polarity sensitivity-ideal for AC-coupled lines, differential buses, or ungrounded sensor interfaces. Thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ max = 150 °C) support reliable operation in compact, thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 24 V nominal systems. |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 32.4 V at 46.3 A - Clamped voltage during 10/1000 µs surge; limits stress on protected circuitry to safe levels. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity. |
| ID @ VWM | 1.0 µA - Reverse leakage at 20 V; negligible power loss and minimal impact on high-impedance sensor bias networks. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification. |
Pinout & Package
SMCJ20CAHE3_A/H uses the SMC (DO-214AB) surface-mount package: 7.11 mm × 6.22 mm × 2.62 mm body, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 rated for 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during negative transients | One of two symmetrical terminals; no polarity marking required for bidirectional operation. |
| Cathode | Current entry terminal during positive transients | Identical physical terminal to Anode; bidirectional symmetry eliminates cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC performance for ± polarity transients-enables single-device protection of AC lines or floating differential signals. |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring extended temperature cycling and long-term reliability. |
| 1500 W peak pulse rating | Withstands 4 kV IEC 61000-4-5 surge events without degradation when mounted on 8 mm × 8 mm copper pads. |
| Low clamping ratio (VC/VWM) | 1.62 - Minimizes overvoltage exposure to downstream components compared to higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60% RH-eliminates bake requirements prior to reflow soldering. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protecting 24 V supply rails feeding ECUs, lighting modules, and actuators from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping element placed at point-of-load input to divert surge energy away from DC-DC converters and microcontrollers. Use Value: Maintains system uptime by preventing latch-up or permanent damage during 12 V/24 V vehicle electrical disturbances. |
Use Scenario: Guarding analog outputs (e.g., 4–20 mA, 0–10 V) and digital sensor interfaces (CAN, LIN) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) parallel protector on signal traces, preserving signal integrity up to 1 MHz bandwidth. Use Value: Enables robust field deployment in factory automation where sensors are exposed to frequent electrostatic discharges and ground potential shifts. |
| Telecom Power Feeds | Consumer Power Adapters |
|
Use Scenario: Safeguarding PoE (Power over Ethernet) injectors and splitters against induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional clamp across isolated DC output rails (e.g., 48 V), absorbing common-mode and differential-mode transients. Use Value: Meets IEC 61000-4-5 compliance for Class B telecom equipment without adding bulkier MOV-based solutions. |
Use Scenario: Secondary-side surge suppression in AC/DC adapters for smart home devices, preventing failure due to mains-borne spikes. IC Role / Device Role / Timing Role: Final-stage protector between rectifier output and primary-side controller IC, rated for repeated 1500 W pulses. Use Value: Extends product lifetime and reduces warranty returns in cost-sensitive consumer electronics with minimal BOM impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CAHE3_A/H | Lower PPPM (600 W), same VWM/VC, SMB package (smaller footprint, lower thermal mass) | Suitable for space-constrained consumer designs with lower surge threat level (IEC 61000-4-5 Level 2) | Select when board area is critical and full 1500 W rating is not required. |
| SMCJ20AHE3_A/H | Unidirectional variant; identical VWM, VBR, VC, and PPPM-but requires correct polarity orientation and adds cathode marking | Applicable only where circuit ground reference is fixed and transients are known to be unidirectional (e.g., DC bus inputs) | Choose only if system architecture guarantees consistent polarity and avoids risk of reverse connection. |
Compared with SMBJ20CAHE3_A/H and SMCJ20AHE3_A/H, SMCJ20CAHE3_A/H uniquely delivers 1500 W bidirectional surge capability in an AEC-Q101-qualified SMC package-making it the optimal choice for automotive and industrial 24 V systems requiring robust, polarity-agnostic protection without layout redesign.
Availability
SMCJ20CAHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom power feeds, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ20CAHE3_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 SMCJ series is engineered for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom-where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMCJ20CAHE3_A/H at its rated peak pulse current?
The SMCJ20CAHE3_A/H has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 46.3 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream circuitry remains within safe voltage limits during surge events. The clamping performance is symmetric for both polarities due to its bidirectional design.
Is SMCJ20CAHE3_A/H qualified for automotive applications?
Yes, SMCJ20CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88394. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness-making it suitable for under-hood and chassis-mounted automotive electronics operating from −40 °C to +125 °C ambient.
How does the bidirectional nature of SMCJ20CAHE3_A/H affect PCB layout?
The bidirectional design of SMCJ20CAHE3_A/H eliminates polarity marking-no cathode band is present, and either terminal may connect to either side of the protected line. This simplifies layout, avoids orientation errors during automated placement, and enables use on floating or AC-coupled nodes such as differential sensor pairs or isolated power rails without ground reference constraints.
What is the thermal resistance of SMCJ20CAHE3_A/H, and how does it impact power dissipation?
SMCJ20CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. At its rated 6.5 W steady-state power dissipation (PD), this results in ~488 °C rise above ambient-so PD is only relevant for continuous DC leakage; actual surge handling relies on short-duration thermal mass, not steady-state cooling.
Can SMCJ20CAHE3_A/H replace a unidirectional TVS like SMCJ20AHE3_A/H in an existing design?
SMCJ20CAHE3_A/H can functionally replace SMCJ20AHE3_A/H in most cases because both share identical VWM (20 V), VBR (22.2–24.5 V), VC (32.4 V), and PPPM (1500 W). However, the bidirectional version removes polarity dependency-so no layout change is needed, but ensure the original design does not rely on unidirectional forward conduction behavior (e.g., for DC bias paths), which SMCJ20CAHE3_A/H does not support.
SMCJ20CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/H FAQ
1.How can I place an order for SMCJ20CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ20CAHE3_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 SMCJ20CAHE3_A/H reliable?
The price and inventory of SMCJ20CAHE3_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 SMCJ20CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ20CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ20CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ20CAHE3_A/H?
SMCJ20CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ20CAHE3_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 SMCJ20CAHE3_A/H?
For technical support, including SMCJ20CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ20CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ20CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ20CAHE3_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 SMCJ20CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ20CAHE3_A/H?
All SMCJ20CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ20CAHE3_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 SMCJ20CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ20CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ20CAHE3_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
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 …
