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Vishay General Semiconductor - Diodes Division SMA5J33CAHM3/H
- Part No.:
- SMA5J33CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CAHM3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,802
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Product details
Overview
SMA5J33CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 33 V standoff voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), clamping voltage of 53.3 V at 9.4 A IPPM, and operates from –55 °C to +150 °C - used in automotive sensor interface protection and industrial I/O line hardening.
For engineers reviewing the SMA5J33CAHM3/H datasheet, SMA5J33CAHM3/H pinout, SMA5J33CAHM3/H application, or SMA5J33CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 80 °C/W), and bidirectional clamping behavior confirmed per ANSI/IEEE C62.35.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical avalanche structure enables identical clamping performance in both polarities, with leakage current ≤1.0 μA at 33 V and maximum clamping voltage of 53.3 V under 9.4 A 10/1000 μs surge.
Rated for 500 W peak pulse power and 40 A non-repetitive forward surge (unidirectional only - not applicable here), it is mounted on 5.0 mm × 5.0 mm copper pads and meets MSL Level 1 (260 °C reflow). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuit. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on during transients. |
| VC @ IPPM | 53.3 V at 9.4 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W - peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage at rated standoff; minimizes standby power loss and signal distortion. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient; informs PCB pad design and power derating above 25 °C. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when voltage exceeds VBR. |
| Case (body) | Mechanical mounting / thermal path | No electrical connection; provides mechanical stability and contributes to thermal dissipation via PCB copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware layout in AC-coupled or floating lines. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and global environmental compliance mandates without compromising surge rating. |
| Low RθJL (25 °C/W) | Enables efficient heat transfer to PCB leads - critical for sustained surge duty cycles and thermal reliability. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning - reduces manufacturing complexity. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤53.3 V while maintaining <1.0 μA leakage at 33 V - preserving signal integrity and preventing latch-up in 3.3 V/5 V receivers. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on channel-level inputs, coordinated with series impedance and filtering. Use Value: Withstands 500 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) Level 3–4 requirements. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Guarding 48 V DC power feeds in PoE-powered network equipment against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-stage TVS on intermediate DC bus, downstream of primary MOV/GDT protection. Use Value: Fast response (<1 ns) and low clamping ratio (VC/VBR ≈ 1.45) minimize overshoot into DC-DC converters and PMICs. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Localized clamp at motor driver output stage, protecting gate drivers and sense resistors. Use Value: 150 °C TJ max and halogen-free HM3 construction support long-term reliability in thermally constrained appliance enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CAHE3/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker resistance. | Approved for commercial/industrial use; not qualified for automotive under AEC-Q101. | Select when halogen-free requirement is absent and cost sensitivity outweighs automotive qualification needs. |
| SMCJ33CAHM3 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (35 °C/W vs. 80 °C/W) and 1500 W PPPM. | Used where higher surge energy handling is required and board space permits larger footprint. | Choose for applications needing >500 W surge margin or legacy designs already using SMC footprints. |
Compared with SMA5J33CAHM3/H, SMA5J33CAHE3/H omits halogen-free and AEC-Q101 compliance, while SMCJ33CAHM3 trades compact size for higher power rating and lower thermal resistance - making SMA5J33CAHM3/H optimal for space-constrained automotive and industrial PCBs requiring certified environmental and reliability attributes.
Availability
SMA5J33CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer appliance motor controls requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMA5J33CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability systems - particularly targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and halogen-free compliance.
FAQ
What is the polarity configuration of SMA5J33CAHM3/H?
SMA5J33CAHM3/H is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMA5J33AHM3/H), it has no cathode band marking and functions identically regardless of voltage polarity - ideal for AC-coupled lines, differential buses, or floating grounds where polarity cannot be assumed.
Does SMA5J33CAHM3/H meet automotive qualification standards?
Yes, SMA5J33CAHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 88875 datasheet. This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "HM3" suffix indicate for SMA5J33CAHM3/H?
The "HM3" suffix on SMA5J33CAHM3/H denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only), M3 (halogen-free RoHS), and HE3 (RoHS + AEC-Q101) - making SMA5J33CAHM3/H the highest environmental and reliability tier in the SMA5J family.
How is thermal performance characterized for SMA5J33CAHM3/H?
SMA5J33CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal, and junction-to-lead resistance (RθJL) of 25 °C/W. These values guide PCB layout decisions - such as minimum pad area and copper thickness - to ensure junction temperature remains below 150 °C during repetitive surge events.
Can SMA5J33CAHM3/H replace SMA5J33A in an existing design?
No - SMA5J33CAHM3/H is bidirectional, whereas SMA5J33A is unidirectional and includes a cathode band. Substituting them requires verifying circuit topology: SMA5J33CAHM3/H may be used only where symmetrical clamping is acceptable and no DC bias polarity dependency exists. Clamping voltage (53.3 V) and standoff (33 V) match, but forward conduction behavior differs fundamentally.
SMA5J33CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.4A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J33CAHM3/H FAQ
1.How can I place an order for SMA5J33CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CAHM3/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 SMA5J33CAHM3/H reliable?
The price and inventory of SMA5J33CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J33CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CAHM3/H?
SMA5J33CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CAHM3/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 SMA5J33CAHM3/H?
For technical support, including SMA5J33CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CAHM3/H requirements.
6.How does Aetrix verify that SMA5J33CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J33CAHM3/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 SMA5J33CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J33CAHM3/H?
All SMA5J33CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CAHM3/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 SMA5J33CAHM3/H part is unused and in its original packaging.
Return procedure for SMA5J33CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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