My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ36CAHM3_A/H
- Part No.:
- SMAJ36CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHM3_A/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,824
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ36CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features 36 V standoff voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ36CAHM3_A/H datasheet, SMAJ36CAHM3_A/H pinout, SMAJ36CAHM3_A/H application, or SMAJ36CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast energy dissipation during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) when mounted per recommended pad layout. Its 10/1000 μs waveform rating applies up to 78 V; above that, PPPM derates to 300 W - a critical design constraint for high-voltage rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 3.3 V/5 V/12 V/24 V system rails. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - guaranteed breakdown range ensures predictable turn-on threshold across temperature and unit variation. |
| VC @ IPPM | 58.1 V at 6.9 A - clamping voltage under standardized 10/1000 μs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak surge power handling capacity; defines survivability against IEC 61000-4-5 Level 3/4 transients. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - enables operation in under-hood automotive or industrial environments without thermal derating penalties. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" × 0.157" footprint; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation (no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (one direction) | Accepts positive-going surge relative to other terminal; symmetrical with cathode in bidirectional mode. |
| Cathode | Transient current entry (opposite direction) | Accepts negative-going surge relative to other terminal; functionally identical to anode in SMAJ36CAHM3_A/H. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709C and IEC 61249-2-21 standards; eliminates brominated flame retardants for safer end-of-life processing. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/500 A without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs - critical for protecting 3.3 V logic interfaces or analog sensor front-ends. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles (peak 260 °C), eliminating bake requirements and simplifying SMT line integration. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load-dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, responding within <1 ns to suppress spikes exceeding 36 V. Use Value: Prevents latch-up or gate oxide damage in automotive-grade MCUs by limiting transient voltage to ≤58.1 V during 400 W surge events. |
Use Scenario: Shielding 4–20 mA current-loop sensor outputs from ESD and inductive switching noise in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) transient shunt across analog output terminals, maintaining loop accuracy during normal operation. Use Value: Ensures uninterrupted sensor data transmission by clamping transients before they distort the current signal or damage op-amp input stages. |
| Telecom Interface Surge Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS pair (two SMAJ36CAHM3_A/H) across A/B lines, providing symmetrical clamping without polarity bias. Use Value: Maintains signal integrity under IEC 61000-4-5 Level 4 (4 kV) surges by limiting differential voltage swing to <116 V peak. |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines behind primary TVS arrays in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamp with low capacitance (typ. 150 pF at 0 V), minimizing signal rise-time degradation. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge tests while preserving USB full-speed timing margins and eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CAHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification. | Approved for industrial/commercial use only; not suitable for automotive OEM or Tier 1 designs requiring AEC-Q101. | Select SMAJ36CAHE3_A/H only if halogen-free content and automotive qualification are not required. |
| SMBJ36CAHM3_A/H | Same VWM/VBR/VC ratings, but SMB (DO-214AA) package - 25 % larger footprint and 600 W PPPM rating. | Better suited for higher-energy surges (e.g., 12 V battery rail protection); requires PCB layout change due to larger pad dimensions. | Choose SMBJ36CAHM3_A/H when surge energy exceeds 400 W or thermal margin is constrained by ambient conditions. |
Compared with SMAJ36CAHE3_A/H, the SMAJ36CAHM3_A/H adds halogen-free construction and AEC-Q101 validation for automotive use; compared with SMBJ36CAHM3_A/H, it trades peak power headroom for smaller board area and tighter layout constraints in space-constrained modules.
Availability
SMAJ36CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom infrastructure, and consumer USB port protection requiring stable component supply and traceable sourcing.
Supply support for SMAJ36CAHM3_A/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 SMAJ series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications systems - delivering robust ESD/surge protection in compact, automated-placement-ready packages.
FAQ
What is the clamping voltage of SMAJ36CAHM3_A/H at its rated peak pulse current?
The SMAJ36CAHM3_A/H has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The clamping performance is verified across temperature and unit-to-unit variation per Vishay's qualification testing.
Is SMAJ36CAHM3_A/H suitable for automotive applications?
Yes, SMAJ36CAHM3_A/H is AEC-Q101 qualified (indicated by the HM3 suffix), making it suitable for automotive applications including engine control units, body electronics, and ADAS sensors. It undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD immunity. Its halogen-free, RoHS-compliant construction further meets automotive material compliance requirements such as JS709C and ELV directives.
How does the bidirectional configuration of SMAJ36CAHM3_A/H affect its circuit implementation?
The bidirectional configuration of SMAJ36CAHM3_A/H means it functions identically in both polarities - no cathode marking is present, and it clamps transients regardless of voltage polarity across its terminals. This allows direct placement across AC-coupled lines (e.g., RS-485, CAN, audio) or ungrounded signal pairs without orientation concerns. Unlike unidirectional variants, it eliminates the need for polarity-aware routing or dual-device solutions.
What is the thermal resistance of SMAJ36CAHM3_A/H, and how does it impact PCB layout?
SMAJ36CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; reducing RθJA requires increasing copper area or adding thermal vias. Layout must follow Vishay's specified pad dimensions to ensure reliable power dissipation and avoid thermal runaway during repetitive surge events.
Does SMAJ36CAHM3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ36CAHM3_A/H meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, meaning it has unlimited floor life and can be processed using standard lead-free reflow profiles without pre-baking. This simplifies manufacturing logistics and reduces risk of popcorning or delamination during assembly - especially important for high-throughput SMT lines serving automotive and industrial customers.
SMAJ36CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ36CAHM3_A/H FAQ
1.How can I place an order for SMAJ36CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHM3_A/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 SMAJ36CAHM3_A/H reliable?
The price and inventory of SMAJ36CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHM3_A/H?
SMAJ36CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHM3_A/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 SMAJ36CAHM3_A/H?
For technical support, including SMAJ36CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHM3_A/H requirements.
6.How does Aetrix verify that SMAJ36CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHM3_A/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 SMAJ36CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHM3_A/H?
All SMAJ36CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHM3_A/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 SMAJ36CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ36CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CAHM3_A/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
