My Inquiry
My Account
Vishay T6N20CAHM3/I
- Part No.:
- T6N20CAHM3/I
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
T6N20CAHM3/I.pdf
- Description:
- 600W,20V 5%, DFN3820A BIDIR TVS
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
T6N20CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® Transient Voltage Suppressor in DFN3820A package, with 20 V nominal breakdown voltage (VBR), 17.1 V stand-off voltage (VWM), 27.7 V clamping voltage at 21.7 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It is AEC-Q101 qualified and rated for TJ = 185 °C, targeting automotive sensor line protection.
For engineers reviewing the T6N20CAHM3/I datasheet, T6N20CAHM3/I pinout, T6N20CAHM3/I application, or T6N20CAHM3/I equivalent, key selection criteria include its bidirectional clamping behavior, low-profile DFN3820A footprint with side-wettable flanks for AOI, 30 kV ESD immunity per IEC 61000-4-2, and compliance with automotive reliability requirements under high-temperature operation.
Technical Context
This device implements passivated anisotropic rectifier technology to achieve stable bidirectional transient suppression without polarity marking. Its junction passivation enables reliable operation up to 185 °C, supporting automotive under-hood environments where thermal derating must be managed per Figure 2 of the datasheet.
The DFN3820A package provides low thermal resistance (RθJM = 5–6.5 °C/W) and meets MSL Level 1 with 260 °C lead-free reflow compatibility. Clamping performance is specified at 21.7 A (10/1000 μs), delivering 27.7 V maximum VC, enabling robust protection of 3.3 V–24 V signal lines against inductive switching transients and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 18 V nominal rails |
| VC @ IPPM | 27.7 V - clamps 10/1000 μs surge to safe level for downstream 3.3 V or 5 V logic interfaces |
| IPPM | 21.7 A - peak surge current handling capacity under standard 10/1000 μs waveform |
| PPPM | 600 W - transient energy absorption capability sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 |
| TJ max | +185 °C - supports placement near heat sources in automotive ECUs without derating loss |
| ESD immunity | ±30 kV contact/air - exceeds IEC 61000-4-2 Level 4 for robust handling and system-level ESD resilience |
Pinout & Package
DFN3820A package: 2-terminal, bidirectional configuration with no cathode band; dimensions 3.95 mm × 2.18 mm × 0.88 mm (L × W × H); matte tin-plated terminals; side-wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Common transient path | Both terminals function identically - symmetric clamping between signal line and ground or rail |
| Case (exposed pad) | Thermal & electrical reference | Internally connected to neither terminal; requires PCB thermal pad for RθJM optimization but no electrical tie |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Side-wettable DFN flanks | Supports automated optical inspection of solder joint quality on both side edges - critical for automotive zero-defect manufacturing |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing per stress test plan |
| 185 °C junction rating | Permits placement in high-ambient zones (e.g., near power MOSFETs or DC/DC converters) without thermal shutdown risk |
| MSL Level 1, 260 °C peak | Eliminates bake requirements prior to SMT assembly - reduces production cost and moisture-related defects |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle body control modules. IC Role / Device Role: Primary transient clamp placed directly at connector entry point, shunting surge energy to chassis ground. Use Value: Maintains signal integrity below 27.7 V during 21.7 A transients, preventing latch-up or damage to 5 V or 3.3 V interface ICs. | Use Scenario: Safeguarding differential CAN_H/CAN_L lines in industrial gateways exposed to long cable runs and field wiring faults. IC Role / Device Role: Bidirectional TVS pair (one per line) referenced to common ground, suppressing common-mode surges per IEC 61000-4-5. Use Value: Withstands 600 W pulses without degradation, preserving bus timing margins and meeting EMC Class B immunity requirements. |
| Automotive Lighting Control | Power Supply Input Stage |
Use Scenario: Shielding LED driver ICs and microcontrollers in adaptive front lighting systems (AFS) from alternator ripple and relay coil flyback. IC Role / Device Role: Standoff-clamp suppressor across 12 V supply rail input, triggered only during >17.1 V overvoltage events. Use Value: Low 1.0 μA leakage at 17.1 V minimizes quiescent current drain - essential for always-on vehicle modules. | Use Scenario: Front-end surge suppression for 24 V industrial PLC power inputs subjected to lightning-induced surges on shared building wiring. IC Role / Device Role: First-line defense before bulk capacitance and DC/DC converter, limiting voltage seen by upstream regulators. Use Value: 27.7 V clamping ensures downstream 24 V-rated components remain within absolute maximum ratings during 10/1000 μs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | DO-214AC package; 20 V VBR; 300 W PPPM; higher VC = 32.4 V; larger footprint (4.5 × 2.7 mm) | Lower power handling and less suitable for space-constrained automotive PCBs | Select when legacy through-hole or larger SMT layout exists and 600 W rating is not required |
| SMCJ20CA | DO-214AB package; same 20 V VBR; 1500 W PPPM; VC = 32.4 V; 7.1 × 6.2 mm footprint | Higher surge capacity but incompatible with DFN-restricted board areas and AOI processes | Choose for high-energy surge zones (e.g., main battery input) where size and optical inspection are secondary |
Compared with SMAJ20CA and SMCJ20CA, the T6N20CAHM3/I delivers identical 20 V standoff in a 3.95 × 2.18 mm DFN3820A package with 600 W rating and side-wettable flanks - making it the only option that satisfies AEC-Q101, MSL Level 1, and automated optical inspection requirements simultaneously in compact automotive layouts.
Availability
T6N20CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and power supply input stage applications requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for T6N20CAHM3/I 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for automotive, industrial, and computing markets.
The T6N20CAHM3/I belongs to Vishay's PAR® family of surface-mount TVS diodes engineered specifically for high-reliability automotive transient suppression with extended junction temperature capability and AOI-compatible packaging.
FAQ
What is the breakdown voltage tolerance of the T6N20CAHM3/I?
The T6N20CAHM3/I has a ±5 % breakdown voltage tolerance, as indicated by the "CA" suffix in its part number. Its specified VBR range is 19.0 V (min) to 21.0 V (max) at 1.0 mA test current, with 20.0 V nominal. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges, critical for protecting sensitive automotive interfaces where margin to IC absolute maximum ratings is narrow.
Is the T6N20CAHM3/I suitable for lead-free reflow soldering?
Yes, the T6N20CAHM3/I is fully compatible with lead-free reflow soldering processes. It meets MSL Level 1 per J-STD-020 and supports a maximum peak temperature of 260 °C. The matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards, and the HM3 suffix confirms qualification to JESD 201 Class 2 whisker resistance - ensuring long-term solder joint integrity in automotive production environments.
Does the T6N20CAHM3/I require a specific PCB pad layout for thermal performance?
Yes, optimal thermal performance for the T6N20CAHM3/I requires adherence to the recommended mounting pad layout for the DFN3820A package. While the exposed thermal pad is not electrically connected, it must be soldered to a dedicated copper thermal pad on the PCB to achieve the specified RθJM of 5–6.5 °C/W. Deviation from the documented pad dimensions (e.g., insufficient copper area or missing thermal vias) will degrade junction-to-mount thermal resistance and reduce surge current derating capability above 25 °C ambient.
How does the T6N20CAHM3/I compare to unidirectional TVS diodes in circuit design?
The T6N20CAHM3/I is bidirectional and has no polarity marking, making it ideal for protecting AC-coupled, differential, or floating signal lines such as CAN, LIN, or sensor bridges. Unlike unidirectional TVS diodes, it clamps equally in both directions - eliminating the need for orientation verification during placement and reducing BOM complexity. Its 17.1 V VWM and 27.7 V VC apply symmetrically, simplifying schematic symbol usage and layout for balanced protection schemes without additional series components.
What is the maximum leakage current specification for the T6N20CAHM3/I at its stand-off voltage?
The T6N20CAHM3/I specifies a maximum reverse leakage current (IR) of 1.0 μA at VWM = 17.1 V and TA = 25 °C. At elevated junction temperature (TJ = 150 °C), leakage remains ≤1.0 μA under the same VWM. This ultra-low leakage preserves signal integrity and minimizes standby power draw - especially important in always-on automotive modules where cumulative leakage across multiple protection devices could impact battery drain budgets.
T6N20CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- 2-VDFN
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN3820A
T6N20CAHM3/I FAQ
1.How can I place an order for T6N20CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for T6N20CAHM3/I 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 T6N20CAHM3/I reliable?
The price and inventory of T6N20CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T6N20CAHM3/I is usually 5 days.
3.What payment methods are accepted for T6N20CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T6N20CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T6N20CAHM3/I?
T6N20CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T6N20CAHM3/I 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 T6N20CAHM3/I?
For technical support, including T6N20CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T6N20CAHM3/I requirements.
6.How does Aetrix verify that T6N20CAHM3/I is sourced from the original manufacturer or authorized distributors?
All T6N20CAHM3/I 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 T6N20CAHM3/I meets industry standards.
7.What is the process for return or replacement of T6N20CAHM3/I?
All T6N20CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with T6N20CAHM3/I, 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 T6N20CAHM3/I part is unused and in its original packaging.
Return procedure for T6N20CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T6N20CAHM3/I 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 …
