My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ22CAHM3/H
- Part No.:
- SMCJ22CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAHM3/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,301
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ22CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V standoff voltage (VWM), 35.5 V clamping voltage (VC) at 42.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on automotive sensor signal lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the SMCJ22CAHM3/H datasheet, SMCJ22CAHM3/H pinout, SMCJ22CAHM3/H application, or SMCJ22CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under real-world PCB pad constraints.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction enables fast response (<1 ns) to transients induced by inductive switching or ESD events, while maintaining low incremental surge resistance for stable clamping performance across repeated surges.
The SMCJ22CAHM3/H is rated for -55 °C to +150 °C operating junction temperature and meets JESD201 Class 2 whisker resistance. Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak, and the HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction per Vishay's automotive-grade specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 35.5 V at 42.3 A - clamped voltage during 1500 W transient, limiting downstream IC stress |
| PPPM | 1500 W - peak surge power handling with 10/1000 µs waveform, critical for ISO 7637-2 pulse 5a/b immunity |
| RθJA | 75 °C/W - thermal resistance to ambient on standard 8 mm × 8 mm copper pads, defining derating above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated placement |
Pinout & Package
SMCJ22CAHM3/H uses the SMC (DO-214AB) package: a two-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path for transient energy; no polarity dependency in circuit layout |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; enables placement flexibility and eliminates orientation checks during assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations without compromising surge robustness or thermal reliability |
| Low incremental surge resistance | Ensures minimal voltage overshoot during fast-rising transients (e.g., ISO 16750-2 load dump spikes) |
| MSL Level 1, 260 °C peak | Supports single-pass lead-free reflow without moisture-induced damage or delamination |
| Glass passivated junction | Provides stable leakage performance (<1 µA at VWM) and long-term reliability under thermal cycling |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching protected ICs. Use Value: Clamps to 35.5 V during 1500 W pulses, preventing damage to 3.3 V/5 V sensor signal conditioning circuitry while maintaining AEC-Q101 compliance. | Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, Profibus) against lightning-induced surges and ground loop transients in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted across differential signal pairs or between signal and ground. Use Value: Symmetrical clamping ensures equal protection for positive/negative transients, eliminating need for dual unidirectional devices and reducing BOM count. |
| Telecom Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and PoE injectors from ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) events in network infrastructure equipment. IC Role / Device Role / Timing Role: Primary-level TVS at board edge, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: 35.5 V clamping voltage aligns with 24 V nominal telecom supply rails, preserving headroom for downstream regulators and isolators. | Use Scenario: Overvoltage suppression on AC-DC adapter primary-side rectifier outputs and DC-DC converter inputs exposed to mains-borne transients. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, providing precise clamping where fast response and low leakage are required. Use Value: <1 µA reverse leakage at 22 V ensures minimal standby power loss, critical for Energy Star and EU CoC Tier 2 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC22CA | Lower PPPM (600 W), same VWM (22 V), smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5 or high-current lightning surges | Select when space-constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| SMCJ22CAHE3/H | Same electrical specs, but RoHS-compliant commercial grade (E3) instead of halogen-free automotive (HM3) | Lacks AEC-Q101 qualification and JESD201 Class 2 whisker resistance; not approved for automotive use | Choose for cost-sensitive industrial or consumer designs where automotive qualification is unnecessary |
Compared with SAC22CA and SMCJ22CAHE3/H, the SMCJ22CAHM3/H uniquely delivers 1500 W surge capacity, AEC-Q101 validation, and halogen-free construction - making it the only option qualified for under-hood automotive deployment with full ISO 7637-2 immunity.
Availability
SMCJ22CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, telecom infrastructure equipment, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ22CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 or extended temperature operation.
FAQ
What is the clamping voltage of SMCJ22CAHM3/H at its rated peak pulse current?
The SMCJ22CAHM3/H has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 42.3 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ22CAHM3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMCJ22CAHM3/H suitable for automotive applications?
Yes, the SMCJ22CAHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix, which denotes halogen-free, RoHS-compliant, and automotive-grade construction. It meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility, supporting deployment in engine control units, ADAS sensors, and body electronics. The SMCJ22CAHM3/H is validated for ISO 7637-2 Pulse 5a/b immunity testing.
How does the bidirectional design of SMCJ22CAHM3/H affect PCB layout?
The bidirectional design of SMCJ22CAHM3/H eliminates polarity concerns during placement - no cathode band marking exists, and either terminal functions identically. This allows unrestricted orientation on PCBs, simplifying automated assembly and reducing risk of misplacement. Layout requires only two symmetric copper pads (minimum 8.0 mm × 8.0 mm each) per terminal to achieve specified thermal and surge ratings. The SMCJ22CAHM3/H does not require routing directionality or orientation verification.
What is the maximum reverse leakage current of SMCJ22CAHM3/H at its standoff voltage?
The SMCJ22CAHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 22 V standoff voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss in always-on systems such as automotive wake-up circuits or battery-backed industrial controllers. Leakage remains below 5 µA up to +125 °C junction temperature, preserving efficiency in thermally stressed environments. The SMCJ22CAHM3/H achieves this performance via glass-passivated junction technology.
Does SMCJ22CAHM3/H require heatsinking for standard operation?
No external heatsink is required for SMCJ22CAHM3/H under typical surge conditions, as its thermal design relies on PCB copper pad area (minimum 8.0 mm × 8.0 mm per terminal) to dissipate energy. With a junction-to-ambient thermal resistance (RθJA) of 75 °C/W, the device self-cools adequately between transient events. Continuous power dissipation is limited to 6.5 W at 50 °C ambient; for sustained high-power operation, increased copper area or internal layer planes are recommended. The SMCJ22CAHM3/H is optimized for pulsed, not steady-state, power handling.
SMCJ22CAHM3/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:
- 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):
- 42.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ22CAHM3/H FAQ
1.How can I place an order for SMCJ22CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAHM3/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 SMCJ22CAHM3/H reliable?
The price and inventory of SMCJ22CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ22CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAHM3/H?
SMCJ22CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAHM3/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 SMCJ22CAHM3/H?
For technical support, including SMCJ22CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAHM3/H requirements.
6.How does Aetrix verify that SMCJ22CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAHM3/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 SMCJ22CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ22CAHM3/H?
All SMCJ22CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAHM3/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 SMCJ22CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ22CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CAHM3/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 …
