My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ22CAHM3/H
- Part No.:
- SMBJ22CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,662
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ22CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ22CAHM3/H datasheet, SMBJ22CAHM3/H pinout, SMBJ22CAHM3/H application, or SMBJ22CAHM3/H equivalent, this part delivers verified bidirectional surge suppression with halogen-free, RoHS-compliant construction, AEC-Q101 qualification, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and lightning transient protection design validation.
Technical Context
This TVS diode operates symmetrically in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%), low incremental surge resistance, and fast response time (<1 ns) to transient events such as inductive switching spikes or ESD.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, supporting reliable operation under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads per terminal. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamped voltage level limits downstream component stress during 600 W transient surges. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform supports IEC 61000-4-5 Level 3/4 surge immunity compliance. |
| IPPM | 16.9 A - Peak surge current capacity derived from VC and PPPM; validates protection capability for common industrial transients. |
| TJ max. | +150 °C - Enables use in under-hood automotive or high-ambient industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as anode and cathode interchangeably.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path for transient energy; no fixed polarity required in circuit layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completes symmetrical clamping path; enables placement across differential lines or AC rails without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge testing up to 1 kV line-to-ground in 2 Ω/12 Ω coupling networks. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules and infotainment interfaces requiring zero-failure reliability. |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU for sustainable electronics manufacturing. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without baking; eliminates moisture-related popcorning risk during PCB reflow. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, reducing stress on protected 3.3 V/5 V logic and analog front-ends. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver signal lines against inductive kickback from relay coils and solenoid switches. IC Role / Device Role / Timing Role: Bidirectional TVS placed across isolated gate drive inputs to clamp ±50 V transients within <1 ns. Use Value: Prevents latch-up or permanent damage to isolated gate drivers (e.g., Si823x) while maintaining signal integrity during 100 kHz PWM switching. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and battery reversal events in door module ECUs. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing >100 A surge currents induced by alternator regulation faults. Use Value: Maintains LIN physical layer compliance (ISO 17987-4) by limiting bus voltage to <40 V during 12 V system transients. |
| Telecom Power Supply Inputs | Consumer Sensor Interface Boards |
|
Use Scenario: Input-stage protection for 48 V DC-DC converters subjected to lightning-induced surges on PoE-powered infrastructure. IC Role / Device Role / Timing Role: First-line clamping device upstream of primary-side controller ICs (e.g., UCC28070). Use Value: Limits input rail excursion to ≤38 V during 6 kV/3 kA combination wave tests, preventing controller UVLO lockout. |
Use Scenario: ESD protection for I²C lines connecting MEMS accelerometers to host microcontrollers in portable devices. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional suppressor placed directly at connector interface. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without signal distortion or timing skew on 400 kHz bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMAJ22CAHM3 | Lower 400 W PPPM; SMA package (smaller footprint, higher RθJA = 140 °C/W); same VWM/VC. | Limited to lower-energy transients; less effective in high-temperature enclosures or high-duty-cycle surge environments. | Choose only if board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 2. |
Compared with SMBJ22CAHM3/H, the HE3/H variant trades halogen-free content and automotive qualification for cost reduction, while the SMAJ22CAHM3 sacrifices pulse power headroom and thermal performance for miniaturization - making SMBJ22CAHM3/H the optimal choice for AEC-Q101-requiring, high-energy transient environments.
Availability
SMBJ22CAHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supply inputs, and consumer sensor interface boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ22CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure resilience and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of SMBJ22CAHM3/H at its rated peak pulse current?
The SMBJ22CAHM3/H has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream components experience controlled overvoltage stress. The SMBJ22CAHM3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with minimal drift due to its low VBR temperature coefficient (0.096 %/°C).
Is SMBJ22CAHM3/H suitable for automotive applications?
Yes, SMBJ22CAHM3/H is AEC-Q101 qualified and specifically designed for automotive use cases including body control modules, lighting drivers, and infotainment interfaces. The HM3 suffix confirms halogen-free, RoHS-compliant construction and qualification to AEC-Q101 stress test requirements. Its 150 °C maximum junction temperature and MSL Level 1 rating support under-hood deployment and single-reflow assembly - making SMBJ22CAHM3/H appropriate for production automotive electronics where reliability and regulatory compliance are mandatory.
How does the bidirectional configuration of SMBJ22CAHM3/H affect circuit layout?
The bidirectional configuration of SMBJ22CAHM3/H eliminates polarity constraints during PCB placement - both terminals are functionally identical, with no cathode band or marking required. This allows direct placement across AC signal pairs (e.g., RS-485, CAN), transformer-coupled lines, or ungrounded power rails without orientation verification. Layout benefits include reduced assembly errors, simplified routing, and compatibility with differential protection schemes where symmetric clamping is essential - all without altering schematic symbol or netlist connectivity for SMBJ22CAHM3/H.
What is the thermal resistance of SMBJ22CAHM3/H, and how does it impact power dissipation?
SMBJ22CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. These values define its ability to dissipate energy from repetitive transients: at 5.0 W steady-state power (PD), junction temperature rise is limited to 500 °C above ambient - but actual operation remains within safe limits due to short pulse duration and duty cycle <0.01 %. The SMBJ22CAHM3/H's low RθJL enables efficient heat transfer to PCB copper, supporting sustained surge handling in thermally constrained designs.
Does SMBJ22CAHM3/H meet industry surge immunity standards?
Yes, SMBJ22CAHM3/H supports compliance with IEC 61000-4-5 (surge immunity) up to Level 4 (4 kV line-to-earth, 2 kV line-to-line) when applied with appropriate series impedance and layout practices. Its 600 W peak pulse power rating, 35.5 V clamping voltage, and sub-nanosecond response time enable effective suppression of 10/1000 µs combination wave surges. The SMBJ22CAHM3/H is also recognized under UL 497B (QVGQ2 file E136766) for telecommunications protector classification - confirming suitability for certified telecom and industrial equipment designs.
SMBJ22CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ22CAHM3/H FAQ
1.How can I place an order for SMBJ22CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3/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 SMBJ22CAHM3/H reliable?
The price and inventory of SMBJ22CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3/H?
SMBJ22CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3/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 SMBJ22CAHM3/H?
For technical support, including SMBJ22CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3/H requirements.
6.How does Aetrix verify that SMBJ22CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3/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 SMBJ22CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3/H?
All SMBJ22CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3/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 SMBJ22CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3/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 …
