My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM5S22CAHM3/I
- Part No.:
- SM5S22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S22CAHM3/I.pdf
- Description:
- 3600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM5S22CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 24 V systems. It features a 22 V standoff voltage (VWM), 25.7 V nominal breakdown voltage (VBR), 35.5 V maximum clamping voltage at 101 A peak pulse current, and 3600 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SM5S22CAHM3/I datasheet, SM5S22CAHM3/I pinout, SM5S22CAHM3/I application, or SM5S22CAHM3/I equivalent, this AEC-Q101-qualified DO-218AC TVS diode delivers high-temperature reliability (TJ = 175 °C), low leakage (<10 μA at VWM), and compliance with ISO 7637-2 and ISO 16750-2 surge standards for automotive electronics protection.
Technical Context
This TVS operates as a voltage-clamping overvoltage protection device in parallel with sensitive circuitry, activating when reverse transient voltage exceeds its breakdown threshold. Its bidirectional structure enables symmetrical clamping for both positive and negative transients without polarity marking.
It uses silicon avalanche junction technology with RoHS-compliant, halogen-free molding compound and matte tin-plated terminals qualified to JESD 201 Class 2 whisker test. Thermal performance is characterized by RθJM = 0.45 °C/W and RθJA = 65 °C/W on FR4 PCB per JEDEC 51-2A/51-14.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (nom) | 25.7 V - Voltage at which device enters avalanche conduction at 5 mA test current; ensures reliable turn-on during transients. |
| VC @ IPPM | 35.5 V at 101 A - Clamped voltage under 10/1000 μs surge; limits downstream component stress to safe levels. |
| PPPM (10/1000 μs) | 3600 W - Peak transient energy handling capacity; supports harsh automotive load dump events. |
| TJ max | 175 °C - Maximum junction temperature rating; enables operation in under-hood environments without derating. |
| ID @ VWM | <10 μA at 25 °C - Low reverse leakage preserves battery life and signal integrity in always-on circuits. |
| Package | DO-218AC - Surface-mount package with metal heatsink terminal; provides low thermal resistance (RθJM = 0.45 °C/W). |
Pinout & Package
SM5S22CAHM3/I is housed in a DO-218AC package with two terminals: Terminal 1 (anode side) and Terminal 2 (metal heatsink/cathode side). The device is bidirectional and has no cathode band marking. Mounting pad layout follows IPC 7351 standard with recommended copper area for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode connection | Primary current entry point during positive transients; soldered to PCB trace with standard footprint. |
| Terminal 2 | Metal heatsink / common terminal | Provides low-impedance thermal path to PCB copper; serves as return path for both polarities due to bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per stress test requirements. |
| ISO 7637-2 & ISO 16750-2 compliance | Meets Pulse 5a (load dump) and Pulse 1/2a/3a transient immunity standards for 24 V vehicle electrical systems. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH; reflow-compatible up to 245 °C peak without preconditioning. |
| Halogen-free, RoHS-compliant construction | Meets environmental regulations and material categorization per Vishay Doc. #99912; suitable for global automotive supply chains. |
| Junction temperature capability | Rated for continuous operation from –55 °C to +175 °C; eliminates need for external thermal derating in engine control units. |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of microcontroller I/O and CAN transceiver power rails against alternator load dump surges during battery disconnection. IC Role / Device Role / Timing Role: Parallel-connected clamping TVS absorbing >3 kW transient energy within microseconds to prevent latch-up or damage. Use Value: Enables robust 24 V system design meeting OEM requirements for ISO 16750-2 Pulse 5a without additional filtering or redundancy. |
Use Scenario: Safeguarding LIN bus transceivers and sensor interface circuits from inductive switching transients in door modules and lighting drivers. IC Role / Device Role / Timing Role: Fast-response voltage clamp limiting transient overshoot to <36 V during relay coil de-energization. Use Value: Prevents false triggering and data corruption in low-voltage digital interfaces while maintaining signal integrity at 19.2 kbps LIN rates. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Input | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Input protection for 12 V–24 V camera modules exposed to battery line transients during cold-cranking and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC/DC converter input to limit voltage excursions during ISO 16750-2 Pulse 4. Use Value: Maintains stable 3.3 V output to image sensor and ISP despite ±100 V, 50 ms transients; avoids brownout resets. |
Use Scenario: Protection of half-bridge gate drivers and current sense amplifiers from motor back-EMF spikes during EPS torque assist transitions. IC Role / Device Role / Timing Role: High-surge-capability TVS shunting inductive kickback energy away from sensitive analog and logic circuitry. Use Value: Eliminates need for snubber networks or larger capacitors; reduces BOM count and PCB area in space-constrained steering column assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5A | Lower PPPM (400 W vs. 3600 W); SMA package (DO-214AC); unidirectional only. | Not suitable for automotive load dump; limited to low-energy ESD/surge in consumer electronics. | Select only for cost-sensitive non-automotive designs where peak surge energy is <500 W. |
| TPSMD22A | Same DO-218AC package; 3600 W rating; but VBR min = 23.1 V and VC = 37.5 V at 101 A. | Higher clamping voltage increases stress on downstream ICs; requires margin verification in 24 V systems. | Acceptable where 2.0 V higher clamping is tolerable and alternate sourcing is needed. |
Compared with SMAJ22A-E3/5A and TPSMD22A, SM5S22CAHM3/I offers superior surge robustness for automotive use, lower clamping voltage for tighter system protection margins, and AEC-Q101 qualification essential for Tier 1 supply chain acceptance.
Availability
SM5S22CAHM3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera power inputs, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SM5S22CAHM3/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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SM5SxxCA family is engineered specifically for high-energy transient suppression in 12 V and 24 V automotive power networks, emphasizing AEC-Q101 compliance, high-temperature stability, and standardized DO-218AC packaging for automated assembly.
FAQ
What is the maximum clamping voltage of SM5S22CAHM3/I under a 10/1000 μs surge?
The SM5S22CAHM3/I exhibits a maximum clamping voltage (VC) of 35.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 101 A. This value is measured per Figure 4 in the Vishay datasheet (Doc. #98458) and represents the upper voltage limit imposed on protected circuitry during worst-case transients. Designers must ensure downstream components tolerate this clamped level under all operating temperatures.
Is SM5S22CAHM3/I suitable for bidirectional surge protection without polarity concerns?
Yes, SM5S22CAHM3/I is explicitly specified as bidirectional in the Vishay datasheet, with no cathode band marking required. Its symmetrical avalanche structure allows identical clamping behavior for both positive- and negative-polarity transients, making it ideal for protecting differential buses like LIN or ungrounded power rails where polarity reversal may occur during fault conditions.
Does SM5S22CAHM3/I meet automotive qualification standards?
Yes, SM5S22CAHM3/I carries full AEC-Q101 qualification as indicated by the "H" in its part number suffix and confirmed in the Ordering Information table (Doc. #98458). It also meets ISO 7637-2 and ISO 16750-2 surge test requirements for automotive applications, including Load Dump (Pulse 5a), making it acceptable for Tier 1 automotive electronics designs.
What is the thermal resistance from junction to mounting pad for SM5S22CAHM3/I?
The SM5S22CAHM3/I has a typical thermal resistance from junction to mounting pad (RθJM) of 0.45 °C/W, as specified in the Thermal Characteristics table (Doc. #98458). This low value is enabled by the DO-218AC package's metal heatsink terminal and requires adequate PCB copper area (per Vishay's recommended pad layout) to realize full thermal performance in high-power surge events.
How does the HM3 suffix affect the material composition of SM5S22CAHM3/I?
The HM3 suffix denotes that SM5S22CAHM3/I uses halogen-free, RoHS-compliant molding compound and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. This material set satisfies automotive environmental requirements and eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating-critical for modern vehicle platforms with strict chemical content controls.
SM5S22CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 101A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM5S22CAHM3/I FAQ
1.How can I place an order for SM5S22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S22CAHM3/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 SM5S22CAHM3/I reliable?
The price and inventory of SM5S22CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S22CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S22CAHM3/I?
SM5S22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S22CAHM3/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 SM5S22CAHM3/I?
For technical support, including SM5S22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S22CAHM3/I requirements.
6.How does Aetrix verify that SM5S22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S22CAHM3/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 SM5S22CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S22CAHM3/I?
All SM5S22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S22CAHM3/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 SM5S22CAHM3/I part is unused and in its original packaging.
Return procedure for SM5S22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S22CAHM3/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 …
