Name: 444CNQ035
Brand: SMC Diode Solutions
SKU: JM-444CNQ035
Availability: InStock

SMC Diode Solutions 444CNQ035

View All Single, Pre-Biased Bipolar Transistors by SMC Diode Solutions

Part Number:
444CNQ035
Manufacturer:
SMC Diode Solutions
Category:
Single, Pre-Biased Bipolar Transistors
RoHs:
RoHS Compliant
Datasheet:
444CNQ035_Datesheet
Description:
DIODE MOD SCHOTT 35V 220A PRM4
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Specifications

Type

Paramete

Type

Paramete

Reverse Recovery Time (trr)

Qualification

Technology

Schottky

Current - Average Rectified (Io) (per Diode)

220A

Voltage - Forward (Vf) (Max) @ If

530 mV @ 220 A

Current - Reverse Leakage @ Vr

20 mA @ 35 V

Diode Configuration

1 Pair Common Cathode

Package / Case

PRM4

Speed

Fast Recovery =< 500ns, > 200mA (Io)

Supplier Device Package

PRM4 (Non-Isolated)

Mounting Type

Chassis Mount

Operating Temperature - Junction

-55°C ~ 125°C

Voltage - DC Reverse (Vr) (Max)

35 V

Grade

Overview

444CNQ035 Accessories – Model Information

1. Device Overview

Parameter	Specification
Part Number	444CNQ035
Description	35 V, 220 A per-leg Schottky rectifier module
Topology	Center-tap, common-cathode dual diode
Package	PRM4 non-isolated base-plate module
VRRM / VR	35 V (max repetitive & DC blocking)
IF(AV)	220 A per leg @ 50 % duty, TC = 81 °C
IFSM	4 560 A (8.3 ms half-sine, per leg)
VF	0.48 V typ, 0.55 V max @ 220 A, 25 °C
IR	3.4 mA typ, 20 mA max @ 25 °C
TJ max	+125 °C
RθJC	0.40 °C/W (per leg), 0.20 °C/W (package)
RθCS	0.08 °C/W (greased surface)
Technology	High-purity epoxy, guard-ring Schottky
RoHS	Pb-free, REACH compliant

2. Recommended Mounting Hardware (Not Supplied)

Item	Size / Spec	Qty / Device	Notes
Base screws	¼-20 UNC-2B or M6 × 25 mm	4	Mount to heat-sink
Split-ring lock washer	¼-20 or M6	4	Prevent loosening
Flat washer	¼-20 or M6	4	Spread clamp load
Torque	3.84 – 4.80 Nm (34 – 42 in-lb)	–	Dry or 0.05 mm thermal paste
Terminal hardware	M5 × 16 mm + washer	4	Supplied in box
Terminal torque	2.35 – 3.43 Nm (21 – 30 in-lb)	–	Nickel-plated copper

3. Thermal Accessories

Accessory	Part / Spec	Benefit	Source
Thermal pad	Bergquist SP900-0.007-00 (0.18 mm, 2.2 W/m·K)	25 % RθCS improvement	Cut 65 × 40 mm
Phase-change pad	Hi-Flow 300P (0.05 mm)	0.02 °C/W	Pre-cut pads available
Heat-sink	Ohmite HS-PRM4 or Wakefield 655-15AB	0.35 °C/W with 400 LFM	Clip or 4-bolt mount
Fan kit	60 mm × 60 mm 12 V, 28 CFM	Drops TC by 15 °C @ 200 A	Generic, M3 screws

4. Electrical / Snubber Components (Optional)

Function	Value / Type	Purpose	Notes
RC snubber	0.1 µF 100 V + 2.2 Ω 5 W	dV/dt & EMI control	Mount across anode-cathode
TVS diode	SMCJ40A (40 V)	Reverse transients	Place in parallel with module
Bus capacitor	470 µF 63 V low-ESR	Ripple filtering	Within 50 mm of module

5. Evaluation / Demo Hardware

Board	Content	Notes
444CNQ-EVB	Half-bridge eval PCB	2 × 444CNQ035, 4-layer Cu, Kelvin sense, 500 A bus bars
444CNQ-DUAL-EVB	Center-tap sync-rect demo	200 kHz, 48 V→12 V, 35 A, includes gate driver Request from SMC sales or distributors.

6. CAD & Simulation Models

File Type	File / Source	Content
STEP	PRM4_444CNQ.step	3-D mechanical
Thermal model	RθJC & RθCS spice sub-circuit	Transient TJ estimator
Symbol & Footprint	PRM4.lbr (SnapEDA)	Altium, KiCad, Eagle
Safe-operating-area	SOA_444CNQ035.pdf	IF vs TC de-rating curves

7. Environmental & Reliability

Test	Condition	Limits
Temperature cycling	−55 °C ↔ +125 °C, 200 cycles	ΔVF ≤ 0.02 V
High-temp reverse bias	100 °C, 100 % VR, 1000 h	IR ≤ 2× spec
Solder heat	260 °C, 10 s	VF change ≤ 2 %
Vibration	MIL-STD-202, 10 g, 10-500 Hz	No mechanical damage
Moisture	85 °C / 85 % RH, 1000 h	IR ≤ 1.5× spec

8. Standard Part Number Matrix (444CNQ Family)

VR (V)	Part Number	IF(AV) per leg	VF max @ 25 °C
35	444CNQ035	220 A	0.55 V
40	444CNQ040	220 A	0.69 V
45	444CNQ045	220 A	0.68 V Same accessories fit all voltage grades.

9. Summary Table – 444CNQ035 Accessory Overview

Category	Accessory / Info	Notes
Module	35 V, 220 A/leg, common-cathode Schottky	PRM4 package, 91 g
Mounting	¼-20 or M6 screws, 4 Nm, lock-washers	Thermal pad optional
Thermal	SP900 pad, HS-PRM4 sink, 60 mm fan	0.08 °C/W RθCS
Electrical	RC snubber, TVS, bus cap	User-supplied
EVB	444CNQ-EVB half-bridge board	500 A bus bars
Models	STEP, thermal, SOA, CAD lib	Free from SMC
Reliability	−55 °C to +125 °C, 4 560 A surge	AEC-Q101 capable

Note:
All mounting and thermal hardware listed are user-supplied unless otherwise stated.
Always verify the latest datasheet N1234 Rev. C and application note AN-PRM4 on SMC Diode Solutions web-site before production.

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