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Vishay General Semiconductor - Diodes Division VTVS21GSMF-HM3-18
- Part No.:
- VTVS21GSMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS21GSMF-HM3-18.pdf
- Description:
- TVS DIODE 20.5VWM 34VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,506
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Product details
Overview
VTVS21GSMF-HM3-18 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, with 23.72 V minimum and 24.69 V maximum reverse breakdown voltage at 1 mA, 20.50 V maximum stand-off voltage, and 34 V maximum clamping voltage at 11.67 A peak pulse current. It delivers ±2 % VBR tolerance, 513 pF typical capacitance at 0 V, and is halogen-free and AEC-Q101 qualified for automotive ESD protection.
For engineers reviewing the VTVS21GSMF-HM3-18 datasheet, VTVS21GSMF-HM3-18 pinout, VTVS21GSMF-HM3-18 application, or VTVS21GSMF-HM3-18 equivalent, this device is selected for high-reliability DC power rail and signal line surge suppression where tight voltage tolerance, low clamping ratio, and IEC 61000-4-2 ±30 kV ESD immunity are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its precisely specified VBR range (23.72–24.69 V). Its low 34 V clamping voltage at 11.67 A (10/1000 μs) ensures robust overvoltage protection for 24 V nominal systems while maintaining minimal voltage overshoot during transients.
The device uses "Low-Noise" fast-response silicon technology with sub-nanosecond response time, enabling effective suppression of EFT bursts and lightning-induced surges. Its SMF (DO-219AB) package supports wave and reflow soldering, complies with MSL level 1, and features UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 23.72 V / 24.69 V at IT = 1 mA - defines precise clamping onset for 24 V system compatibility |
| VRWM | 20.50 V max - ensures reliable blocking of normal 24 V rail operation without leakage |
| VC @ IPPM | 34 V at 11.67 A (10/1000 μs) - limits transient voltage to safe margin below downstream IC absolute max ratings |
| PPPM | 400 W - sustains high-energy surges common in automotive load-dump and ISO 7637-2 tests |
| CD | 513 pF at VR = 0 V, f = 1 MHz - low enough for CAN, LIN, and sensor interfaces without signal integrity degradation |
| ESD Rating | ±30 kV contact & air discharge per IEC 61000-4-2 - meets automotive and industrial front-panel ESD requirements |
| TJ max | +175 °C - enables under-hood deployment in engine control units and body electronics |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case with cathode marking bar; dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H); compatible with SOD-123W footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side opposite cathode bar) | Reference node for unidirectional clamping | Connected to protected line; conducts only during negative transients relative to cathode |
| Cathode (bar-marked end) | Clamp output / surge return path | Connected to ground or lower-potential rail; sinks transient current to limit voltage rise |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % VBR tolerance | Enables tighter system-level voltage margining vs. ±5 % variants, reducing overdesign in 24 V supply protection |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from ISO 7637-2 Pulse 1/2a/5a without degradation |
| IEC 61000-4-2 ±30 kV ESD immunity | Eliminates need for external ESD stages on exposed connectors in automotive infotainment and ADAS modules |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Halogen-free & RoHS-compliant | Meets EU ELV Directive and OEM sustainability requirements for vehicle production |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional transient clamp placed between battery input and DC/DC converter input. Use Value: Limits voltage to ≤34 V during 11.67 A surges, preventing damage to downstream PMICs rated for 36 V absolute max. |
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in factory automation PLCs from cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transients before signal conditioning op-amps. Use Value: 513 pF capacitance avoids bandwidth reduction in 10 kHz sensor signals while clamping to 34 V. |
| Automotive CAN Bus Node Protection | Consumer Appliance Control Board ESD Guard |
Use Scenario: Safeguarding CANH/CANL lines in body control modules exposed to ESD from user interaction. IC Role / Device Role / Timing Role: Bidirectional protection not applicable - this unidirectional device used on VCC rail feeding CAN transceiver. Use Value: ±30 kV IEC 61000-4-2 rating prevents latch-up or failure of CAN PHY during assembly or service. |
Use Scenario: Protecting microcontroller GPIOs and display interface lines in smart home appliances from user-handling ESD. IC Role / Device Role / Timing Role: Point-of-entry clamp on 24 V auxiliary supply feeding MCU power domain. Use Value: AEC-Q101 qualification ensures long-term reliability despite non-automotive use, supporting 10+ year product lifecycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VTVS21ASMF-HM3-18 | ±5 % VBR (23.0–25.4 V) vs. ±2 % (23.72–24.69 V); same package, clamping, and power rating | Suitable where wider voltage margin is acceptable, e.g., non-safety-critical 24 V peripherals | Select VTVS21ASMF-HM3-18 for cost-sensitive designs with relaxed VBR tolerance requirements. |
| SMAJ22A-E3/57T | 22 V VWM, 35.5 V VC @ 11.3 A, SMA package (DO-214AC), no AEC-Q101 qualification | Larger footprint; lacks automotive qualification and tighter VBR control | Choose SMAJ22A-E3/57T only for non-automotive industrial applications where DO-214AC layout exists. |
Compared with VTVS21ASMF-HM3-18 and SMAJ22A-E3/57T, VTVS21GSMF-HM3-18 provides superior voltage precision and automotive qualification in a smaller SMF package, making it optimal for space-constrained, safety-critical 24 V systems requiring guaranteed clamping performance.
Availability
VTVS21GSMF-HM3-18 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, CAN subsystems, and consumer appliance control boards requiring stable component supply across multi-year production cycles.
Supply support for VTVS21GSMF-HM3-18 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The VTVS-GSMF series is designed specifically for high-precision, AEC-Q101-qualified transient suppression in 12 V and 24 V automotive electrical systems, emphasizing tight voltage tolerance and robust surge handling.
FAQ
What is the exact reverse breakdown voltage range for VTVS21GSMF-HM3-18?
The VTVS21GSMF-HM3-18 has a reverse breakdown voltage (VBR) range of 23.72 V to 24.69 V at IT = 1 mA and TJ = 25 °C, reflecting its ±2 % tolerance grade. This precise window ensures consistent clamping behavior across production lots and supports accurate system-level overvoltage margining in 24 V architectures. The VTVS21GSMF-HM3-18 datasheet specifies these values in the Electrical Characteristics table under the VTVS21GSMF part number row.
Is VTVS21GSMF-HM3-18 qualified for automotive use?
Yes, VTVS21GSMF-HM3-18 is AEC-Q101 qualified, meaning it has passed stress tests including temperature cycling, high-temperature operating life, and ESD robustness required for automotive electronic components. This qualification applies to the full VTVSxxGSMF family and is explicitly stated in the Vishay document 85891 Rev. 2.2. The VTVS21GSMF-HM3-18 is therefore approved for use in engine control, body electronics, and ADAS modules.
What is the maximum clamping voltage of VTVS21GSMF-HM3-18 under surge conditions?
The VTVS21GSMF-HM3-18 exhibits a maximum reverse clamping voltage (VC) of 34 V at 11.67 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and guarantees that protected circuits will not experience voltages exceeding 34 V during high-energy transients. The VTVS21GSMF-HM3-18 maintains this clamping performance across its full operating temperature range.
Does VTVS21GSMF-HM3-18 meet IEC 61000-4-2 ESD standards?
Yes, VTVS21GSMF-HM3-18 provides ±30 kV contact discharge and ±30 kV air discharge ESD protection per IEC 61000-4-2, verified through standardized testing. This performance is intrinsic to its "Low-Noise" silicon design and is confirmed in the Features section of the Vishay datasheet. The VTVS21GSMF-HM3-18 is routinely deployed on exposed ports and connectors in automotive and industrial equipment to prevent ESD-induced failures.
What package type does VTVS21GSMF-HM3-18 use, and is it compatible with automated assembly?
VTVS21GSMF-HM3-18 uses the SMF (DO-219AB) package - a low-profile, halogen-free surface-mount case measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with standard wave and reflow soldering processes, rated for peak temperatures up to 260 °C, and classified as MSL level 1. The VTVS21GSMF-HM3-18's tape-and-reel packaging (HM3-18 = 13" reel, 10 kpcs) supports high-volume SMT line integration.
VTVS21GSMF-HM3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 23.72V
- Voltage - Clamping (Max) @ Ipp:
- 34V
- Current - Peak Pulse (10/1000µs):
- 11.67A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 513pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS21GSMF-HM3-18 FAQ
1.How can I place an order for VTVS21GSMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS21GSMF-HM3-18 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 VTVS21GSMF-HM3-18 reliable?
The price and inventory of VTVS21GSMF-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS21GSMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS21GSMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS21GSMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS21GSMF-HM3-18?
VTVS21GSMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS21GSMF-HM3-18 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 VTVS21GSMF-HM3-18?
For technical support, including VTVS21GSMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS21GSMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS21GSMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS21GSMF-HM3-18 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 VTVS21GSMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS21GSMF-HM3-18?
All VTVS21GSMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS21GSMF-HM3-18, 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 VTVS21GSMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS21GSMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS21GSMF-HM3-18 Tags
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